From e40b73ac00f30b7ba88f792d8cba9f162204f033 Mon Sep 17 00:00:00 2001 From: Aleksandr Mishin Date: Thu, 22 Sep 2022 16:41:35 +0300 Subject: [PATCH] #165: changed todo formatting --- .../org/polystat/j2eo/eotree/EOMetaObjects.kt | 2 +- .../polystat/j2eo/translator/Expressions.kt | 22 +- .../j2eo/translator/MethodInvocations.kt | 2 +- .../polystat/j2eo/translator/Statements.kt | 3 +- .../polystat/j2eo/translator/Translator.kt | 4 +- .../polystat/j2eo/treeMapper/TreeMappings.kt | 9 +- .../kotlin/org/polystat/j2eo/util/Naming.kt | 2 +- .../org/polystat/j2eo/util/StaticGenerator.kt | 5 +- src/test/resources/codebase/View.java | 13975 ---------------- .../SimpleNativeMethod.java | 4 +- .../SampleTest.java | 3 +- 11 files changed, 34 insertions(+), 13997 deletions(-) delete mode 100644 src/test/resources/codebase/View.java diff --git a/src/main/kotlin/org/polystat/j2eo/eotree/EOMetaObjects.kt b/src/main/kotlin/org/polystat/j2eo/eotree/EOMetaObjects.kt index a7955242..7a15fe5a 100644 --- a/src/main/kotlin/org/polystat/j2eo/eotree/EOMetaObjects.kt +++ b/src/main/kotlin/org/polystat/j2eo/eotree/EOMetaObjects.kt @@ -12,7 +12,7 @@ import arrow.core.Option */ fun EOSeqCall(vararg statements: EOCopy): EOBndExpr = EOSeqCall(statements.toList()) -// TODO: maybe expand list type from List to List? +// @todo #165:90m maybe we should expand list type from List to List? /** * Generator of seq > @ blocks. */ diff --git a/src/main/kotlin/org/polystat/j2eo/translator/Expressions.kt b/src/main/kotlin/org/polystat/j2eo/translator/Expressions.kt index 342b8260..bfe66167 100644 --- a/src/main/kotlin/org/polystat/j2eo/translator/Expressions.kt +++ b/src/main/kotlin/org/polystat/j2eo/translator/Expressions.kt @@ -181,7 +181,7 @@ fun mapParenthesized(expr: Parenthesized, name: String, context: Context): List< ) + mapExpression(expr.expression, parExprName, context) } -// TODO: add support for type +// @todo #165:90m Support for type should be added fun mapThis(expr: This, name: String, context: Context): EOBndExpr { return EOBndExpr( EOObject( @@ -290,8 +290,12 @@ fun mapUnaryPostfix(expr: UnaryPostfix, name: String, context: Context): List { val function = when (expr.operator) { TokenCode.Plus -> "add" @@ -315,14 +319,14 @@ fun mapBinary(expr: Binary, name: String, context: Context): List { TokenCode.LeftShiftAssign -> "shift_l_equal" TokenCode.ArithmRightShift -> "shift_u" TokenCode.ArithmRightShiftAssign -> "shift_u_equal" - TokenCode.NonEqual -> "not_eq" /* TODO: double check */ - TokenCode.DoubleVertical -> "or" /* TODO: double check */ - TokenCode.DoubleAmpersand -> "and" /* TODO: double check */ - TokenCode.Ampersand -> "bit_and" /* TODO: double check */ - TokenCode.Vertical -> "bit_or" /* TODO: double check */ + TokenCode.NonEqual -> "not_eq" + TokenCode.DoubleVertical -> "or" + TokenCode.DoubleAmpersand -> "and" + TokenCode.Ampersand -> "bit_and" + TokenCode.Vertical -> "bit_or" TokenCode.VerticalAssign -> "or_write" /* FIXME */ TokenCode.AmpersandAssign -> "and_write" /* FIXME */ - TokenCode.Caret -> "bit_xor" /* TODO: double check */ + TokenCode.Caret -> "bit_xor" else -> "binary_op_placeholder" // FIXME // throw IllegalArgumentException("Binary operation ${expr.operator} is not supported") diff --git a/src/main/kotlin/org/polystat/j2eo/translator/MethodInvocations.kt b/src/main/kotlin/org/polystat/j2eo/translator/MethodInvocations.kt index 45a5ef9b..2313b715 100644 --- a/src/main/kotlin/org/polystat/j2eo/translator/MethodInvocations.kt +++ b/src/main/kotlin/org/polystat/j2eo/translator/MethodInvocations.kt @@ -70,7 +70,7 @@ fun trueMethodInvocationName(name: String): List { } } -// TODO: create state object to store binding of expression +// @todo #165:90m Create state object to store binding of expression fun mapMethodInvocation(methodInvocation: MethodInvocation, name: String, context: Context): List { // require(!methodInvocation.superSign) { "Super sign isn't supported yet" } /* FIXME (NOW PARTIALLY SUPPORTED) */ diff --git a/src/main/kotlin/org/polystat/j2eo/translator/Statements.kt b/src/main/kotlin/org/polystat/j2eo/translator/Statements.kt index 50645469..1b41ff03 100644 --- a/src/main/kotlin/org/polystat/j2eo/translator/Statements.kt +++ b/src/main/kotlin/org/polystat/j2eo/translator/Statements.kt @@ -185,8 +185,9 @@ fun mapIfThenElseStatement(rn: IfThenElse, name: String, context: Context): List * * conditionExpr and statement are mapped into separate objects. * - * TODO: check if we can use iterator inside of statement. */ + +// @todo #165:90m We should check if we can use iterator inside of statement fun mapWhileStatement(wh: While, name: String, context: Context): List { val emptyName = context.genUniqueEntityName("empty") val condName = context.genUniqueEntityName(wh.condition) diff --git a/src/main/kotlin/org/polystat/j2eo/translator/Translator.kt b/src/main/kotlin/org/polystat/j2eo/translator/Translator.kt index b0de8285..76147574 100644 --- a/src/main/kotlin/org/polystat/j2eo/translator/Translator.kt +++ b/src/main/kotlin/org/polystat/j2eo/translator/Translator.kt @@ -29,10 +29,10 @@ class Translator(val relativePath: Path) { " is not supported" ) } - + // @todo #165:30m We should add license to EOLicense() fun mapPackage(pkg: Package, context: Context): EOProgram { return EOProgram( - EOLicense(), // TODO: add license? + EOLicense(), EOMetas( Some(pkg.compoundName.names.joinToString(".")), ArrayList() diff --git a/src/main/kotlin/org/polystat/j2eo/treeMapper/TreeMappings.kt b/src/main/kotlin/org/polystat/j2eo/treeMapper/TreeMappings.kt index 173901f9..ba9b1d1e 100644 --- a/src/main/kotlin/org/polystat/j2eo/treeMapper/TreeMappings.kt +++ b/src/main/kotlin/org/polystat/j2eo/treeMapper/TreeMappings.kt @@ -38,12 +38,13 @@ fun TypeDeclarationContext.toTopLevelComponent(): TopLevelComponent? = null // throw java.lang.Exception("Cannot translate") // FIXME } +// @todo #165:90m We should implement this.typeList(1) for PERMITS (Java 17) fun ClassDeclarationContext.toClassDeclaration(): ClassDeclaration = NormalClassDeclaration( identifier().toToken(), typeParameters()?.toTypeParameters(), typeType()?.toType(), - typeList(0)?.toTypeList(), // TODO: use this.typeList(1) for PERMITS (Java 17) + typeList(0)?.toTypeList(), classBody().toDeclarations() ) @@ -187,12 +188,13 @@ fun TypeTypeOrVoidContext.toType(): Type? = typeType()?.toType() fun BlockContext.toDeclaration(isStatic: TerminalNode?): List = listOf(ClassInitializer(this.toBlock(), isStatic != null)) +// @todo #165:90m return Block(null, ...). Is it always null? fun BlockContext.toBlock(): Block { val blockStmntsLst = ArrayList(this.blockStatement().map { it.toBlockStatement() }) val blockStmnts = BlockStatements(blockStmntsLst.removeFirstOrNull()) blockStmntsLst.forEach { blockStmnts.add(it) } blockStmnts.blockStatements.removeIf { it == null } - return Block(null /* TODO: always null? */, blockStmnts) + return Block(null, blockStmnts) } fun Declaration.toBlockStatement(): BlockStatement = BlockStatement(this) @@ -465,6 +467,7 @@ fun ArgumentsContext.toArgList(): ArgumentList { } } +// @todo #165:60m Maybe type arguments are somewhere else? fun MethodCallContext.toExpression(expr: Expression?): Expression { val exprLst = if (expressionList() == null) listOf() @@ -476,7 +479,7 @@ fun MethodCallContext.toExpression(expr: Expression?): Expression { return MethodInvocation( expr, SUPER() != null, - null, // TODO: type arguments are somewhere else + null, identifier()?.toToken() ?: if (SUPER() != null) { Token(TokenCode.Super, "super") } else { null } ?: if (THIS() != null) { Token(TokenCode.This, "this") } else { null }, diff --git a/src/main/kotlin/org/polystat/j2eo/util/Naming.kt b/src/main/kotlin/org/polystat/j2eo/util/Naming.kt index a704af1d..ee8a2df7 100644 --- a/src/main/kotlin/org/polystat/j2eo/util/Naming.kt +++ b/src/main/kotlin/org/polystat/j2eo/util/Naming.kt @@ -7,6 +7,6 @@ fun String.eoClassName(): String = genClassName(this) fun genClassName(javaName: String): String = "class__$javaName" -// TODO: introduce logic considering packages and classes +// @todo #165:90m introduce logic considering packages and classes fun CompoundName.eoClassCompoundName(): CompoundName = CompoundName(names.dropLast(1) + names.last().eoClassName()) diff --git a/src/main/kotlin/org/polystat/j2eo/util/StaticGenerator.kt b/src/main/kotlin/org/polystat/j2eo/util/StaticGenerator.kt index e4d48e4e..7a1044d5 100644 --- a/src/main/kotlin/org/polystat/j2eo/util/StaticGenerator.kt +++ b/src/main/kotlin/org/polystat/j2eo/util/StaticGenerator.kt @@ -13,13 +13,14 @@ import tree.Declaration.NormalClassDeclaration /** * Maps all static class members to EO bindings, skipping non-static ones. */ +// @todo #165:90m dec is ClassDeclaration is not always true fun generateStatic(clsDec: NormalClassDeclaration, context: Context): List { return clsDec.body.declarations .filter { dec: Declaration -> dec.modifiers?.modifiers?.modifiers?.find { it == TokenCode.Static } != null || dec is ConstructorDeclaration || - dec is ClassDeclaration /* FIXME (IT'S NOT ALWAYS TRUE) */ - } // TODO + dec is ClassDeclaration + } .map { mapClassDeclaration(it, context) } .flatten() } diff --git a/src/test/resources/codebase/View.java b/src/test/resources/codebase/View.java deleted file mode 100644 index e970a110..00000000 --- a/src/test/resources/codebase/View.java +++ /dev/null @@ -1,13975 +0,0 @@ -/* - * Copyright (C) 2006 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package android.view; -import android.content.ClipData; -import android.content.Context; -import android.content.res.Configuration; -import android.content.res.Resources; -import android.content.res.TypedArray; -import android.graphics.Bitmap; -import android.graphics.Camera; -import android.graphics.Canvas; -import android.graphics.Interpolator; -import android.graphics.LinearGradient; -import android.graphics.Matrix; -import android.graphics.Paint; -import android.graphics.PixelFormat; -import android.graphics.Point; -import android.graphics.PorterDuff; -import android.graphics.PorterDuffXfermode; -import android.graphics.Rect; -import android.graphics.RectF; -import android.graphics.Region; -import android.graphics.Shader; -import android.graphics.drawable.ColorDrawable; -import android.graphics.drawable.Drawable; -import android.os.Handler; -import android.os.IBinder; -import android.os.Message; -import android.os.Parcel; -import android.os.Parcelable; -import android.os.RemoteException; -import android.os.SystemClock; -import android.text.TextUtils; -import android.util.AttributeSet; -import android.util.FloatProperty; -import android.util.LocaleUtil; -import android.util.Log; -import android.util.Pool; -import android.util.Poolable; -import android.util.PoolableManager; -import android.util.Pools; -import android.util.Property; -import android.util.SparseArray; -import android.util.TypedValue; -import android.view.ContextMenu.ContextMenuInfo; -import android.view.accessibility.AccessibilityEvent; -import android.view.accessibility.AccessibilityEventSource; -import android.view.accessibility.AccessibilityManager; -import android.view.accessibility.AccessibilityNodeInfo; -import android.view.accessibility.AccessibilityNodeProvider; -import android.view.animation.Animation; -import android.view.animation.AnimationUtils; -import android.view.animation.Transformation; -import android.view.inputmethod.EditorInfo; -import android.view.inputmethod.InputConnection; -import android.view.inputmethod.InputMethodManager; -import android.widget.ScrollBarDrawable; -import static android.os.Build.VERSION_CODES.*; -import com.android.internal.R; -import com.android.internal.util.Predicate; -import com.android.internal.view.menu.MenuBuilder; -import java.lang.ref.WeakReference; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.util.ArrayList; -import java.util.Arrays; -import java.util.Locale; -import java.util.concurrent.CopyOnWriteArrayList; -/** - *

- * This class represents the basic building block for user interface components. A View - * occupies a rectangular area on the screen and is responsible for drawing and - * event handling. View is the base class for widgets, which are - * used to create interactive UI components (buttons, text fields, etc.). The - * {@link android.view.ViewGroup} subclass is the base class for layouts, which - * are invisible containers that hold other Views (or other ViewGroups) and define - * their layout properties. - *

- * - *
- *

Developer Guides

- *

For information about using this class to develop your application's user interface, - * read the User Interface developer guide. - *

- * - * - *

Using Views

- *

- * All of the views in a window are arranged in a single tree. You can add views - * either from code or by specifying a tree of views in one or more XML layout - * files. There are many specialized subclasses of views that act as controls or - * are capable of displaying text, images, or other content. - *

- *

- * Once you have created a tree of views, there are typically a few types of - * common operations you may wish to perform: - *

    - *
  • Set properties: for example setting the text of a - * {@link android.widget.TextView}. The available properties and the methods - * that set them will vary among the different subclasses of views. Note that - * properties that are known at build time can be set in the XML layout - * files.
    • - *
  • Set focus: The framework will handled moving focus in - * response to user input. To force focus to a specific view, call - * {@link #requestFocus}.
    • - *
  • Set up listeners: Views allow clients to set listeners - * that will be notified when something interesting happens to the view. For - * example, all views will let you set a listener to be notified when the view - * gains or loses focus. You can register such a listener using - * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. - * Other view subclasses offer more specialized listeners. For example, a Button - * exposes a listener to notify clients when the button is clicked.
    • - *
  • Set visibility: You can hide or show views using - * {@link #setVisibility(int)}.
    • - *
- *

- *

- * Note: The Android framework is responsible for measuring, laying out and - * drawing views. You should not call methods that perform these actions on - * views yourself unless you are actually implementing a - * {@link android.view.ViewGroup}. - *

- * - * - *

Implementing a Custom View

- * - *

- * To implement a custom view, you will usually begin by providing overrides for - * some of the standard methods that the framework calls on all views. You do - * not need to override all of these methods. In fact, you can start by just - * overriding {@link #onDraw(android.graphics.Canvas)}. - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - *
Category Methods Description
CreationConstructorsThere is a form of the constructor that are called when the view - * is created from code and a form that is called when the view is - * inflated from a layout file. The second form should parse and apply - * any attributes defined in the layout file. - *
{@link #onFinishInflate()}Called after a view and all of its children has been inflated - * from XML.
Layout{@link #onMeasure(int, int)}Called to determine the size requirements for this view and all - * of its children. - *
{@link #onLayout(boolean, int, int, int, int)}Called when this view should assign a size and position to all - * of its children. - *
{@link #onSizeChanged(int, int, int, int)}Called when the size of this view has changed. - *
Drawing{@link #onDraw(android.graphics.Canvas)}Called when the view should render its content. - *
Event processing{@link #onKeyDown(int, KeyEvent)}Called when a new key event occurs. - *
{@link #onKeyUp(int, KeyEvent)}Called when a key up event occurs. - *
{@link #onTrackballEvent(MotionEvent)}Called when a trackball motion event occurs. - *
{@link #onTouchEvent(MotionEvent)}Called when a touch screen motion event occurs. - *
Focus{@link #onFocusChanged(boolean, int, android.graphics.Rect)}Called when the view gains or loses focus. - *
{@link #onWindowFocusChanged(boolean)}Called when the window containing the view gains or loses focus. - *
Attaching{@link #onAttachedToWindow()}Called when the view is attached to a window. - *
{@link #onDetachedFromWindow}Called when the view is detached from its window. - *
{@link #onWindowVisibilityChanged(int)}Called when the visibility of the window containing the view - * has changed. - *
- *

- * - * - *

IDs

- * Views may have an integer id associated with them. These ids are typically - * assigned in the layout XML files, and are used to find specific views within - * the view tree. A common pattern is to: - *
    - *
  • Define a Button in the layout file and assign it a unique ID. - * 
    - * <Button
- *     android:id="@+id/my_button"
- *     android:layout_width="wrap_content"
- *     android:layout_height="wrap_content"
- *     android:text="@string/my_button_text"/>
- *
    • - *
  • From the onCreate method of an Activity, find the Button - * 
    - *      Button myButton = (Button) findViewById(R.id.my_button);
- *
    • - *
- *

- * View IDs need not be unique throughout the tree, but it is good practice to - * ensure that they are at least unique within the part of the tree you are - * searching. - *

- * - * - *

Position

- *

- * The geometry of a view is that of a rectangle. A view has a location, - * expressed as a pair of left and top coordinates, and - * two dimensions, expressed as a width and a height. The unit for location - * and dimensions is the pixel. - *

- * - *

- * It is possible to retrieve the location of a view by invoking the methods - * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, - * coordinate of the rectangle representing the view. The latter returns the - * top, or Y, coordinate of the rectangle representing the view. These methods - * both return the location of the view relative to its parent. For instance, - * when getLeft() returns 20, that means the view is located 20 pixels to the - * right of the left edge of its direct parent. - *

- * - *

- * In addition, several convenience methods are offered to avoid unnecessary - * computations, namely {@link #getRight()} and {@link #getBottom()}. - * These methods return the coordinates of the right and bottom edges of the - * rectangle representing the view. For instance, calling {@link #getRight()} - * is similar to the following computation: getLeft() + getWidth() - * (see Size for more information about the width.) - *

- * - * - *

Size, padding and margins

- *

- * The size of a view is expressed with a width and a height. A view actually - * possess two pairs of width and height values. - *

- * - *

- * The first pair is known as measured width and - * measured height. These dimensions define how big a view wants to be - * within its parent (see Layout for more details.) The - * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} - * and {@link #getMeasuredHeight()}. - *

- * - *

- * The second pair is simply known as width and height, or - * sometimes drawing width and drawing height. These - * dimensions define the actual size of the view on screen, at drawing time and - * after layout. These values may, but do not have to, be different from the - * measured width and height. The width and height can be obtained by calling - * {@link #getWidth()} and {@link #getHeight()}. - *

- * - *

- * To measure its dimensions, a view takes into account its padding. The padding - * is expressed in pixels for the left, top, right and bottom parts of the view. - * Padding can be used to offset the content of the view by a specific amount of - * pixels. For instance, a left padding of 2 will push the view's content by - * 2 pixels to the right of the left edge. Padding can be set using the - * {@link #setPadding(int, int, int, int)} method and queried by calling - * {@link #getPaddingLeft()}, {@link #getPaddingTop()}, - * {@link #getPaddingRight()}, {@link #getPaddingBottom()}. - *

- * - *

- * Even though a view can define a padding, it does not provide any support for - * margins. However, view groups provide such a support. Refer to - * {@link android.view.ViewGroup} and - * {@link android.view.ViewGroup.MarginLayoutParams} for further information. - *

- * - * - *

Layout

- *

- * Layout is a two pass process: a measure pass and a layout pass. The measuring - * pass is implemented in {@link #measure(int, int)} and is a top-down traversal - * of the view tree. Each view pushes dimension specifications down the tree - * during the recursion. At the end of the measure pass, every view has stored - * its measurements. The second pass happens in - * {@link #layout(int,int,int,int)} and is also top-down. During - * this pass each parent is responsible for positioning all of its children - * using the sizes computed in the measure pass. - *

- * - *

- * When a view's measure() method returns, its {@link #getMeasuredWidth()} and - * {@link #getMeasuredHeight()} values must be set, along with those for all of - * that view's descendants. A view's measured width and measured height values - * must respect the constraints imposed by the view's parents. This guarantees - * that at the end of the measure pass, all parents accept all of their - * children's measurements. A parent view may call measure() more than once on - * its children. For example, the parent may measure each child once with - * unspecified dimensions to find out how big they want to be, then call - * measure() on them again with actual numbers if the sum of all the children's - * unconstrained sizes is too big or too small. - *

- * - *

- * The measure pass uses two classes to communicate dimensions. The - * {@link MeasureSpec} class is used by views to tell their parents how they - * want to be measured and positioned. The base LayoutParams class just - * describes how big the view wants to be for both width and height. For each - * dimension, it can specify one of: - *

    - *
  • an exact number - *
  • MATCH_PARENT, which means the view wants to be as big as its parent - * (minus padding) - *
  • WRAP_CONTENT, which means that the view wants to be just big enough to - * enclose its content (plus padding). - *
- * There are subclasses of LayoutParams for different subclasses of ViewGroup. - * For example, AbsoluteLayout has its own subclass of LayoutParams which adds - * an X and Y value. - *

- * - *

- * MeasureSpecs are used to push requirements down the tree from parent to - * child. A MeasureSpec can be in one of three modes: - *

    - *
  • UNSPECIFIED: This is used by a parent to determine the desired dimension - * of a child view. For example, a LinearLayout may call measure() on its child - * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how - * tall the child view wants to be given a width of 240 pixels. - *
  • EXACTLY: This is used by the parent to impose an exact size on the - * child. The child must use this size, and guarantee that all of its - * descendants will fit within this size. - *
  • AT_MOST: This is used by the parent to impose a maximum size on the - * child. The child must gurantee that it and all of its descendants will fit - * within this size. - *
- *

- * - *

- * To intiate a layout, call {@link #requestLayout}. This method is typically - * called by a view on itself when it believes that is can no longer fit within - * its current bounds. - *

- * - * - *

Drawing

- *

- * Drawing is handled by walking the tree and rendering each view that - * intersects the invalid region. Because the tree is traversed in-order, - * this means that parents will draw before (i.e., behind) their children, with - * siblings drawn in the order they appear in the tree. - * If you set a background drawable for a View, then the View will draw it for you - * before calling back to its onDraw() method. - *

- * - *

- * Note that the framework will not draw views that are not in the invalid region. - *

- * - *

- * To force a view to draw, call {@link #invalidate()}. - *

- * - * - *

Event Handling and Threading

- *

- * The basic cycle of a view is as follows: - *

    - *
  1. An event comes in and is dispatched to the appropriate view. The view - * handles the event and notifies any listeners.
    2. - *
  2. If in the course of processing the event, the view's bounds may need - * to be changed, the view will call {@link #requestLayout()}.
    3. - *
  3. Similarly, if in the course of processing the event the view's appearance - * may need to be changed, the view will call {@link #invalidate()}.
    4. - *
  4. If either {@link #requestLayout()} or {@link #invalidate()} were called, - * the framework will take care of measuring, laying out, and drawing the tree - * as appropriate.
    5. - *
- *

- * - *

Note: The entire view tree is single threaded. You must always be on - * the UI thread when calling any method on any view. - * If you are doing work on other threads and want to update the state of a view - * from that thread, you should use a {@link Handler}. - *

- * - * - *

Focus Handling

- *

- * The framework will handle routine focus movement in response to user input. - * This includes changing the focus as views are removed or hidden, or as new - * views become available. Views indicate their willingness to take focus - * through the {@link #isFocusable} method. To change whether a view can take - * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) - * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} - * and can change this via {@link #setFocusableInTouchMode(boolean)}. - *

- *

- * Focus movement is based on an algorithm which finds the nearest neighbor in a - * given direction. In rare cases, the default algorithm may not match the - * intended behavior of the developer. In these situations, you can provide - * explicit overrides by using these XML attributes in the layout file: - * 

- * nextFocusDown
- * nextFocusLeft
- * nextFocusRight
- * nextFocusUp
- *
- *

- * - * - *

- * To get a particular view to take focus, call {@link #requestFocus()}. - *

- * - * - *

Touch Mode

- *

- * When a user is navigating a user interface via directional keys such as a D-pad, it is - * necessary to give focus to actionable items such as buttons so the user can see - * what will take input. If the device has touch capabilities, however, and the user - * begins interacting with the interface by touching it, it is no longer necessary to - * always highlight, or give focus to, a particular view. This motivates a mode - * for interaction named 'touch mode'. - *

- *

- * For a touch capable device, once the user touches the screen, the device - * will enter touch mode. From this point onward, only views for which - * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. - * Other views that are touchable, like buttons, will not take focus when touched; they will - * only fire the on click listeners. - *

- *

- * Any time a user hits a directional key, such as a D-pad direction, the view device will - * exit touch mode, and find a view to take focus, so that the user may resume interacting - * with the user interface without touching the screen again. - *

- *

- * The touch mode state is maintained across {@link android.app.Activity}s. Call - * {@link #isInTouchMode} to see whether the device is currently in touch mode. - *

- * - * - *

Scrolling

- *

- * The framework provides basic support for views that wish to internally - * scroll their content. This includes keeping track of the X and Y scroll - * offset as well as mechanisms for drawing scrollbars. See - * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and - * {@link #awakenScrollBars()} for more details. - *

- * - * - *

Tags

- *

- * Unlike IDs, tags are not used to identify views. Tags are essentially an - * extra piece of information that can be associated with a view. They are most - * often used as a convenience to store data related to views in the views - * themselves rather than by putting them in a separate structure. - *

- * - * - *

Animation

- *

- * You can attach an {@link Animation} object to a view using - * {@link #setAnimation(Animation)} or - * {@link #startAnimation(Animation)}. The animation can alter the scale, - * rotation, translation and alpha of a view over time. If the animation is - * attached to a view that has children, the animation will affect the entire - * subtree rooted by that node. When an animation is started, the framework will - * take care of redrawing the appropriate views until the animation completes. - *

- *

- * Starting with Android 3.0, the preferred way of animating views is to use the - * {@link android.animation} package APIs. - *

- * - * - *

Security

- *

- * Sometimes it is essential that an application be able to verify that an action - * is being performed with the full knowledge and consent of the user, such as - * granting a permission request, making a purchase or clicking on an advertisement. - * Unfortunately, a malicious application could try to spoof the user into - * performing these actions, unaware, by concealing the intended purpose of the view. - * As a remedy, the framework offers a touch filtering mechanism that can be used to - * improve the security of views that provide access to sensitive functionality. - *

- * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the - * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework - * will discard touches that are received whenever the view's window is obscured by - * another visible window. As a result, the view will not receive touches whenever a - * toast, dialog or other window appears above the view's window. - *

- * For more fine-grained control over security, consider overriding the - * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own - * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. - *

- * - * @attr ref android.R.styleable#View_alpha - * @attr ref android.R.styleable#View_background - * @attr ref android.R.styleable#View_clickable - * @attr ref android.R.styleable#View_contentDescription - * @attr ref android.R.styleable#View_drawingCacheQuality - * @attr ref android.R.styleable#View_duplicateParentState - * @attr ref android.R.styleable#View_id - * @attr ref android.R.styleable#View_requiresFadingEdge - * @attr ref android.R.styleable#View_fadingEdgeLength - * @attr ref android.R.styleable#View_filterTouchesWhenObscured - * @attr ref android.R.styleable#View_fitsSystemWindows - * @attr ref android.R.styleable#View_isScrollContainer - * @attr ref android.R.styleable#View_focusable - * @attr ref android.R.styleable#View_focusableInTouchMode - * @attr ref android.R.styleable#View_hapticFeedbackEnabled - * @attr ref android.R.styleable#View_keepScreenOn - * @attr ref android.R.styleable#View_layerType - * @attr ref android.R.styleable#View_longClickable - * @attr ref android.R.styleable#View_minHeight - * @attr ref android.R.styleable#View_minWidth - * @attr ref android.R.styleable#View_nextFocusDown - * @attr ref android.R.styleable#View_nextFocusLeft - * @attr ref android.R.styleable#View_nextFocusRight - * @attr ref android.R.styleable#View_nextFocusUp - * @attr ref android.R.styleable#View_onClick - * @attr ref android.R.styleable#View_padding - * @attr ref android.R.styleable#View_paddingBottom - * @attr ref android.R.styleable#View_paddingLeft - * @attr ref android.R.styleable#View_paddingRight - * @attr ref android.R.styleable#View_paddingTop - * @attr ref android.R.styleable#View_saveEnabled - * @attr ref android.R.styleable#View_rotation - * @attr ref android.R.styleable#View_rotationX - * @attr ref android.R.styleable#View_rotationY - * @attr ref android.R.styleable#View_scaleX - * @attr ref android.R.styleable#View_scaleY - * @attr ref android.R.styleable#View_scrollX - * @attr ref android.R.styleable#View_scrollY - * @attr ref android.R.styleable#View_scrollbarSize - * @attr ref android.R.styleable#View_scrollbarStyle - * @attr ref android.R.styleable#View_scrollbars - * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade - * @attr ref android.R.styleable#View_scrollbarFadeDuration - * @attr ref android.R.styleable#View_scrollbarTrackHorizontal - * @attr ref android.R.styleable#View_scrollbarThumbHorizontal - * @attr ref android.R.styleable#View_scrollbarThumbVertical - * @attr ref android.R.styleable#View_scrollbarTrackVertical - * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack - * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack - * @attr ref android.R.styleable#View_soundEffectsEnabled - * @attr ref android.R.styleable#View_tag - * @attr ref android.R.styleable#View_transformPivotX - * @attr ref android.R.styleable#View_transformPivotY - * @attr ref android.R.styleable#View_translationX - * @attr ref android.R.styleable#View_translationY - * @attr ref android.R.styleable#View_visibility - * - * @see android.view.ViewGroup - */ -public class View implements Drawable.Callback, Drawable.Callback2, KeyEvent.Callback, - AccessibilityEventSource { - private static final boolean DBG = false; - /** - * The logging tag used by this class with android.util.Log. - */ - protected static final String VIEW_LOG_TAG = "View"; - /** - * Used to mark a View that has no ID. - */ - public static final int NO_ID = -1; - /** - * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when - * calling setFlags. - */ - private static final int NOT_FOCUSABLE = 0x00000000; - /** - * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling - * setFlags. - */ - private static final int FOCUSABLE = 0x00000001; - /** - * Mask for use with setFlags indicating bits used for focus. - */ - private static final int FOCUSABLE_MASK = 0x00000001; - /** - * This view will adjust its padding to fit sytem windows (e.g. status bar) - */ - private static final int FITS_SYSTEM_WINDOWS = 0x00000002; - /** - * This view is visible. - * Use with {@link #setVisibility} and {@code - * android:visibility}. - */ - public static final int VISIBLE = 0x00000000; - /** - * This view is invisible, but it still takes up space for layout purposes. - * Use with {@link #setVisibility} and {@code - * android:visibility}. - */ - public static final int INVISIBLE = 0x00000004; - /** - * This view is invisible, and it doesn't take any space for layout - * purposes. Use with {@link #setVisibility} and {@code - * android:visibility}. - */ - public static final int GONE = 0x00000008; - /** - * Mask for use with setFlags indicating bits used for visibility. - * {@hide} - */ - static final int VISIBILITY_MASK = 0x0000000C; - private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; - /** - * This view is enabled. Intrepretation varies by subclass. - * Use with ENABLED_MASK when calling setFlags. - * {@hide} - */ - static final int ENABLED = 0x00000000; - /** - * This view is disabled. Intrepretation varies by subclass. - * Use with ENABLED_MASK when calling setFlags. - * {@hide} - */ - static final int DISABLED = 0x00000020; - /** - * Mask for use with setFlags indicating bits used for indicating whether - * this view is enabled - * {@hide} - */ - static final int ENABLED_MASK = 0x00000020; - /** - * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be - * called and further optimizations will be performed. It is okay to have - * this flag set and a background. Use with DRAW_MASK when calling setFlags. - * {@hide} - */ - static final int WILL_NOT_DRAW = 0x00000080; - /** - * Mask for use with setFlags indicating bits used for indicating whether - * this view is will draw - * {@hide} - */ - static final int DRAW_MASK = 0x00000080; - /** - *

This view doesn't show scrollbars.

- * {@hide} - */ - static final int SCROLLBARS_NONE = 0x00000000; - /** - *

This view shows horizontal scrollbars.

- * {@hide} - */ - static final int SCROLLBARS_HORIZONTAL = 0x00000100; - /** - *

This view shows vertical scrollbars.

- * {@hide} - */ - static final int SCROLLBARS_VERTICAL = 0x00000200; - /** - *

Mask for use with setFlags indicating bits used for indicating which - * scrollbars are enabled.

- * {@hide} - */ - static final int SCROLLBARS_MASK = 0x00000300; - /** - * Indicates that the view should filter touches when its window is obscured. - * Refer to the class comments for more information about this security feature. - * {@hide} - */ - static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; - // note flag value 0x00000800 is now available for next flags... - /** - *

This view doesn't show fading edges.

- * {@hide} - */ - static final int FADING_EDGE_NONE = 0x00000000; - /** - *

This view shows horizontal fading edges.

- * {@hide} - */ - static final int FADING_EDGE_HORIZONTAL = 0x00001000; - /** - *

This view shows vertical fading edges.

- * {@hide} - */ - static final int FADING_EDGE_VERTICAL = 0x00002000; - /** - *

Mask for use with setFlags indicating bits used for indicating which - * fading edges are enabled.

- * {@hide} - */ - static final int FADING_EDGE_MASK = 0x00003000; - /** - *

Indicates this view can be clicked. When clickable, a View reacts - * to clicks by notifying the OnClickListener.

- * {@hide} - */ - static final int CLICKABLE = 0x00004000; - /** - *

Indicates this view is caching its drawing into a bitmap.

- * {@hide} - */ - static final int DRAWING_CACHE_ENABLED = 0x00008000; - /** - *

Indicates that no icicle should be saved for this view.

- * {@hide} - */ - static final int SAVE_DISABLED = 0x000010000; - /** - *

Mask for use with setFlags indicating bits used for the saveEnabled - * property.

- * {@hide} - */ - static final int SAVE_DISABLED_MASK = 0x000010000; - /** - *

Indicates that no drawing cache should ever be created for this view.

- * {@hide} - */ - static final int WILL_NOT_CACHE_DRAWING = 0x000020000; - /** - *

Indicates this view can take / keep focus when int touch mode.

- * {@hide} - */ - static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; - /** - *

Enables low quality mode for the drawing cache.

- */ - public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; - /** - *

Enables high quality mode for the drawing cache.

- */ - public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; - /** - *

Enables automatic quality mode for the drawing cache.

- */ - public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; - private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { - DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH - }; - /** - *

Mask for use with setFlags indicating bits used for the cache - * quality property.

- * {@hide} - */ - static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; - /** - *

- * Indicates this view can be long clicked. When long clickable, a View - * reacts to long clicks by notifying the OnLongClickListener or showing a - * context menu. - *

- * {@hide} - */ - static final int LONG_CLICKABLE = 0x00200000; - /** - *

Indicates that this view gets its drawable states from its direct parent - * and ignores its original internal states.

- * - * @hide - */ - static final int DUPLICATE_PARENT_STATE = 0x00400000; - /** - * The scrollbar style to display the scrollbars inside the content area, - * without increasing the padding. The scrollbars will be overlaid with - * translucency on the view's content. - */ - public static final int SCROLLBARS_INSIDE_OVERLAY = 0; - /** - * The scrollbar style to display the scrollbars inside the padded area, - * increasing the padding of the view. The scrollbars will not overlap the - * content area of the view. - */ - public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; - /** - * The scrollbar style to display the scrollbars at the edge of the view, - * without increasing the padding. The scrollbars will be overlaid with - * translucency. - */ - public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; - /** - * The scrollbar style to display the scrollbars at the edge of the view, - * increasing the padding of the view. The scrollbars will only overlap the - * background, if any. - */ - public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; - /** - * Mask to check if the scrollbar style is overlay or inset. - * {@hide} - */ - static final int SCROLLBARS_INSET_MASK = 0x01000000; - /** - * Mask to check if the scrollbar style is inside or outside. - * {@hide} - */ - static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; - /** - * Mask for scrollbar style. - * {@hide} - */ - static final int SCROLLBARS_STYLE_MASK = 0x03000000; - /** - * View flag indicating that the screen should remain on while the - * window containing this view is visible to the user. This effectively - * takes care of automatically setting the WindowManager's - * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. - */ - public static final int KEEP_SCREEN_ON = 0x04000000; - /** - * View flag indicating whether this view should have sound effects enabled - * for events such as clicking and touching. - */ - public static final int SOUND_EFFECTS_ENABLED = 0x08000000; - /** - * View flag indicating whether this view should have haptic feedback - * enabled for events such as long presses. - */ - public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; - /** - *

Indicates that the view hierarchy should stop saving state when - * it reaches this view. If state saving is initiated immediately at - * the view, it will be allowed. - * {@hide} - */ - static final int PARENT_SAVE_DISABLED = 0x20000000; - /** - *

Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.

- * {@hide} - */ - static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; - /** - * Horizontal direction of this view is from Left to Right. - * Use with {@link #setLayoutDirection}. - * {@hide} - */ - public static final int LAYOUT_DIRECTION_LTR = 0x00000000; - /** - * Horizontal direction of this view is from Right to Left. - * Use with {@link #setLayoutDirection}. - * {@hide} - */ - public static final int LAYOUT_DIRECTION_RTL = 0x40000000; - /** - * Horizontal direction of this view is inherited from its parent. - * Use with {@link #setLayoutDirection}. - * {@hide} - */ - public static final int LAYOUT_DIRECTION_INHERIT = 0x80000000; - /** - * Horizontal direction of this view is from deduced from the default language - * script for the locale. Use with {@link #setLayoutDirection}. - * {@hide} - */ - public static final int LAYOUT_DIRECTION_LOCALE = 0xC0000000; - /** - * Mask for use with setFlags indicating bits used for horizontalDirection. - * {@hide} - */ - static final int LAYOUT_DIRECTION_MASK = 0xC0000000; - /* - * Array of horizontal direction flags for mapping attribute "horizontalDirection" to correct - * flag value. - * {@hide} - */ - private static final int[] LAYOUT_DIRECTION_FLAGS = {LAYOUT_DIRECTION_LTR, - LAYOUT_DIRECTION_RTL, LAYOUT_DIRECTION_INHERIT, LAYOUT_DIRECTION_LOCALE}; - /** - * Default horizontalDirection. - * {@hide} - */ - private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; - /** - * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} - * should add all focusable Views regardless if they are focusable in touch mode. - */ - public static final int FOCUSABLES_ALL = 0x00000000; - /** - * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} - * should add only Views focusable in touch mode. - */ - public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; - /** - * Use with {@link #focusSearch(int)}. Move focus to the previous selectable - * item. - */ - public static final int FOCUS_BACKWARD = 0x00000001; - /** - * Use with {@link #focusSearch(int)}. Move focus to the next selectable - * item. - */ - public static final int FOCUS_FORWARD = 0x00000002; - /** - * Use with {@link #focusSearch(int)}. Move focus to the left. - */ - public static final int FOCUS_LEFT = 0x00000011; - /** - * Use with {@link #focusSearch(int)}. Move focus up. - */ - public static final int FOCUS_UP = 0x00000021; - /** - * Use with {@link #focusSearch(int)}. Move focus to the right. - */ - public static final int FOCUS_RIGHT = 0x00000042; - /** - * Use with {@link #focusSearch(int)}. Move focus down. - */ - public static final int FOCUS_DOWN = 0x00000082; - /** - * Bits of {@link #getMeasuredWidthAndState()} and - * {@link #getMeasuredWidthAndState()} that provide the actual measured size. - */ - public static final int MEASURED_SIZE_MASK = 0x00ffffff; - /** - * Bits of {@link #getMeasuredWidthAndState()} and - * {@link #getMeasuredWidthAndState()} that provide the additional state bits. - */ - public static final int MEASURED_STATE_MASK = 0xff000000; - /** - * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits - * for functions that combine both width and height into a single int, - * such as {@link #getMeasuredState()} and the childState argument of - * {@link #resolveSizeAndState(int, int, int)}. - */ - public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; - /** - * Bit of {@link #getMeasuredWidthAndState()} and - * {@link #getMeasuredWidthAndState()} that indicates the measured size - * is smaller that the space the view would like to have. - */ - public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; - /** - * Base View state sets - */ - // Singles - /** - * Indicates the view has no states set. States are used with - * {@link android.graphics.drawable.Drawable} to change the drawing of the - * view depending on its state. - * - * @see android.graphics.drawable.Drawable - * @see #getDrawableState() - */ - protected static final int[] EMPTY_STATE_SET; - /** - * Indicates the view is enabled. States are used with - * {@link android.graphics.drawable.Drawable} to change the drawing of the - * view depending on its state. - * - * @see android.graphics.drawable.Drawable - * @see #getDrawableState() - */ - protected static final int[] ENABLED_STATE_SET; - /** - * Indicates the view is focused. States are used with - * {@link android.graphics.drawable.Drawable} to change the drawing of the - * view depending on its state. - * - * @see android.graphics.drawable.Drawable - * @see #getDrawableState() - */ - protected static final int[] FOCUSED_STATE_SET; - /** - * Indicates the view is selected. States are used with - * {@link android.graphics.drawable.Drawable} to change the drawing of the - * view depending on its state. - * - * @see android.graphics.drawable.Drawable - * @see #getDrawableState() - */ - protected static final int[] SELECTED_STATE_SET; - /** - * Indicates the view is pressed. States are used with - * {@link android.graphics.drawable.Drawable} to change the drawing of the - * view depending on its state. - * - * @see android.graphics.drawable.Drawable - * @see #getDrawableState() - * @hide - */ - protected static final int[] PRESSED_STATE_SET; - /** - * Indicates the view's window has focus. States are used with - * {@link android.graphics.drawable.Drawable} to change the drawing of the - * view depending on its state. - * - * @see android.graphics.drawable.Drawable - * @see #getDrawableState() - */ - protected static final int[] WINDOW_FOCUSED_STATE_SET; - // Doubles - /** - * Indicates the view is enabled and has the focus. - * - * @see #ENABLED_STATE_SET - * @see #FOCUSED_STATE_SET - */ - protected static final int[] ENABLED_FOCUSED_STATE_SET; - /** - * Indicates the view is enabled and selected. - * - * @see #ENABLED_STATE_SET - * @see #SELECTED_STATE_SET - */ - protected static final int[] ENABLED_SELECTED_STATE_SET; - /** - * Indicates the view is enabled and that its window has focus. - * - * @see #ENABLED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is focused and selected. - * - * @see #FOCUSED_STATE_SET - * @see #SELECTED_STATE_SET - */ - protected static final int[] FOCUSED_SELECTED_STATE_SET; - /** - * Indicates the view has the focus and that its window has the focus. - * - * @see #FOCUSED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is selected and that its window has the focus. - * - * @see #SELECTED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; - // Triples - /** - * Indicates the view is enabled, focused and selected. - * - * @see #ENABLED_STATE_SET - * @see #FOCUSED_STATE_SET - * @see #SELECTED_STATE_SET - */ - protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; - /** - * Indicates the view is enabled, focused and its window has the focus. - * - * @see #ENABLED_STATE_SET - * @see #FOCUSED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is enabled, selected and its window has the focus. - * - * @see #ENABLED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is focused, selected and its window has the focus. - * - * @see #FOCUSED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is enabled, focused, selected and its window - * has the focus. - * - * @see #ENABLED_STATE_SET - * @see #FOCUSED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed and its window has the focus. - * - * @see #PRESSED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed and selected. - * - * @see #PRESSED_STATE_SET - * @see #SELECTED_STATE_SET - */ - protected static final int[] PRESSED_SELECTED_STATE_SET; - /** - * Indicates the view is pressed, selected and its window has the focus. - * - * @see #PRESSED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed and focused. - * - * @see #PRESSED_STATE_SET - * @see #FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed, focused and its window has the focus. - * - * @see #PRESSED_STATE_SET - * @see #FOCUSED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed, focused and selected. - * - * @see #PRESSED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; - /** - * Indicates the view is pressed, focused, selected and its window has the focus. - * - * @see #PRESSED_STATE_SET - * @see #FOCUSED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed and enabled. - * - * @see #PRESSED_STATE_SET - * @see #ENABLED_STATE_SET - */ - protected static final int[] PRESSED_ENABLED_STATE_SET; - /** - * Indicates the view is pressed, enabled and its window has the focus. - * - * @see #PRESSED_STATE_SET - * @see #ENABLED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed, enabled and selected. - * - * @see #PRESSED_STATE_SET - * @see #ENABLED_STATE_SET - * @see #SELECTED_STATE_SET - */ - protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; - /** - * Indicates the view is pressed, enabled, selected and its window has the - * focus. - * - * @see #PRESSED_STATE_SET - * @see #ENABLED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed, enabled and focused. - * - * @see #PRESSED_STATE_SET - * @see #ENABLED_STATE_SET - * @see #FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed, enabled, focused and its window has the - * focus. - * - * @see #PRESSED_STATE_SET - * @see #ENABLED_STATE_SET - * @see #FOCUSED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; - /** - * Indicates the view is pressed, enabled, focused and selected. - * - * @see #PRESSED_STATE_SET - * @see #ENABLED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; - /** - * Indicates the view is pressed, enabled, focused, selected and its window - * has the focus. - * - * @see #PRESSED_STATE_SET - * @see #ENABLED_STATE_SET - * @see #SELECTED_STATE_SET - * @see #FOCUSED_STATE_SET - * @see #WINDOW_FOCUSED_STATE_SET - */ - protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; - /** - * The order here is very important to {@link #getDrawableState()} - */ - private static final int[][] VIEW_STATE_SETS; - static final int VIEW_STATE_WINDOW_FOCUSED = 1; - static final int VIEW_STATE_SELECTED = 1 << 1; - static final int VIEW_STATE_FOCUSED = 1 << 2; - static final int VIEW_STATE_ENABLED = 1 << 3; - static final int VIEW_STATE_PRESSED = 1 << 4; - static final int VIEW_STATE_ACTIVATED = 1 << 5; - static final int VIEW_STATE_ACCELERATED = 1 << 6; - static final int VIEW_STATE_HOVERED = 1 << 7; - static final int VIEW_STATE_DRAG_CAN_ACCEPT = 1 << 8; - static final int VIEW_STATE_DRAG_HOVERED = 1 << 9; - static final int[] VIEW_STATE_IDS = new int[] { - R.attr.state_window_focused, VIEW_STATE_WINDOW_FOCUSED, - R.attr.state_selected, VIEW_STATE_SELECTED, - R.attr.state_focused, VIEW_STATE_FOCUSED, - R.attr.state_enabled, VIEW_STATE_ENABLED, - R.attr.state_pressed, VIEW_STATE_PRESSED, - R.attr.state_activated, VIEW_STATE_ACTIVATED, - R.attr.state_accelerated, VIEW_STATE_ACCELERATED, - R.attr.state_hovered, VIEW_STATE_HOVERED, - R.attr.state_drag_can_accept, VIEW_STATE_DRAG_CAN_ACCEPT, - R.attr.state_drag_hovered, VIEW_STATE_DRAG_HOVERED, - }; - static { - if ((VIEW_STATE_IDS.length/2) != R.styleable.ViewDrawableStates.length) { - throw new IllegalStateException( - "VIEW_STATE_IDs array length does not match ViewDrawableStates style array"); - } - int[] orderedIds = new int[VIEW_STATE_IDS.length]; - for (int i = 0; i < R.styleable.ViewDrawableStates.length; i++) { - int viewState = R.styleable.ViewDrawableStates[i]; - for (int j = 0; j sThreadLocal = new ThreadLocal(); - /** - * Map used to store views' tags. - */ - private SparseArray mKeyedTags; - /** - * The next available accessiiblity id. - */ - private static int sNextAccessibilityViewId; - /** - * The animation currently associated with this view. - * @hide - */ - protected Animation mCurrentAnimation = null; - /** - * Width as measured during measure pass. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "measurement") - int mMeasuredWidth; - /** - * Height as measured during measure pass. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "measurement") - int mMeasuredHeight; - /** - * Flag to indicate that this view was marked INVALIDATED, or had its display list - * invalidated, prior to the current drawing iteration. If true, the view must re-draw - * its display list. This flag, used only when hw accelerated, allows us to clear the - * flag while retaining this information until it's needed (at getDisplayList() time and - * in drawChild(), when we decide to draw a view's children's display lists into our own). - * - * {@hide} - */ - boolean mRecreateDisplayList = false; - /** - * The view's identifier. - * {@hide} - * - * @see #setId(int) - * @see #getId() - */ - @ViewDebug.ExportedProperty(resolveId = true) - int mID = NO_ID; - /** - * The stable ID of this view for accessibility purposes. - */ - int mAccessibilityViewId = NO_ID; - /** - * The view's tag. - * {@hide} - * - * @see #setTag(Object) - * @see #getTag() - */ - protected Object mTag; - // for mPrivateFlags: - /** {@hide} */ - static final int WANTS_FOCUS = 0x00000001; - /** {@hide} */ - static final int FOCUSED = 0x00000002; - /** {@hide} */ - static final int SELECTED = 0x00000004; - /** {@hide} */ - static final int IS_ROOT_NAMESPACE = 0x00000008; - /** {@hide} */ - static final int HAS_BOUNDS = 0x00000010; - /** {@hide} */ - static final int DRAWN = 0x00000020; - /** - * When this flag is set, this view is running an animation on behalf of its - * children and should therefore not cancel invalidate requests, even if they - * lie outside of this view's bounds. - * - * {@hide} - */ - static final int DRAW_ANIMATION = 0x00000040; - /** {@hide} */ - static final int SKIP_DRAW = 0x00000080; - /** {@hide} */ - static final int ONLY_DRAWS_BACKGROUND = 0x00000100; - /** {@hide} */ - static final int REQUEST_TRANSPARENT_REGIONS = 0x00000200; - /** {@hide} */ - static final int DRAWABLE_STATE_DIRTY = 0x00000400; - /** {@hide} */ - static final int MEASURED_DIMENSION_SET = 0x00000800; - /** {@hide} */ - static final int FORCE_LAYOUT = 0x00001000; - /** {@hide} */ - static final int LAYOUT_REQUIRED = 0x00002000; - private static final int PRESSED = 0x00004000; - /** {@hide} */ - static final int DRAWING_CACHE_VALID = 0x00008000; - /** - * Flag used to indicate that this view should be drawn once more (and only once - * more) after its animation has completed. - * {@hide} - */ - static final int ANIMATION_STARTED = 0x00010000; - private static final int SAVE_STATE_CALLED = 0x00020000; - /** - * Indicates that the View returned true when onSetAlpha() was called and that - * the alpha must be restored. - * {@hide} - */ - static final int ALPHA_SET = 0x00040000; - /** - * Set by {@link #setScrollContainer(boolean)}. - */ - static final int SCROLL_CONTAINER = 0x00080000; - /** - * Set by {@link #setScrollContainer(boolean)}. - */ - static final int SCROLL_CONTAINER_ADDED = 0x00100000; - /** - * View flag indicating whether this view was invalidated (fully or partially.) - * - * @hide - */ - static final int DIRTY = 0x00200000; - /** - * View flag indicating whether this view was invalidated by an opaque - * invalidate request. - * - * @hide - */ - static final int DIRTY_OPAQUE = 0x00400000; - /** - * Mask for {@link #DIRTY} and {@link #DIRTY_OPAQUE}. - * - * @hide - */ - static final int DIRTY_MASK = 0x00600000; - /** - * Indicates whether the background is opaque. - * - * @hide - */ - static final int OPAQUE_BACKGROUND = 0x00800000; - /** - * Indicates whether the scrollbars are opaque. - * - * @hide - */ - static final int OPAQUE_SCROLLBARS = 0x01000000; - /** - * Indicates whether the view is opaque. - * - * @hide - */ - static final int OPAQUE_MASK = 0x01800000; - /** - * Indicates a prepressed state; - * the short time between ACTION_DOWN and recognizing - * a 'real' press. Prepressed is used to recognize quick taps - * even when they are shorter than ViewConfiguration.getTapTimeout(). - * - * @hide - */ - private static final int PREPRESSED = 0x02000000; - /** - * Indicates whether the view is temporarily detached. - * - * @hide - */ - static final int CANCEL_NEXT_UP_EVENT = 0x04000000; - /** - * Indicates that we should awaken scroll bars once attached - * - * @hide - */ - private static final int AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; - /** - * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. - * @hide - */ - private static final int HOVERED = 0x10000000; - /** - * Indicates that pivotX or pivotY were explicitly set and we should not assume the center - * for transform operations - * - * @hide - */ - private static final int PIVOT_EXPLICITLY_SET = 0x20000000; - /** {@hide} */ - static final int ACTIVATED = 0x40000000; - /** - * Indicates that this view was specifically invalidated, not just dirtied because some - * child view was invalidated. The flag is used to determine when we need to recreate - * a view's display list (as opposed to just returning a reference to its existing - * display list). - * - * @hide - */ - static final int INVALIDATED = 0x80000000; - /* Masks for mPrivateFlags2 */ - /** - * Indicates that this view has reported that it can accept the current drag's content. - * Cleared when the drag operation concludes. - * @hide - */ - static final int DRAG_CAN_ACCEPT = 0x00000001; - /** - * Indicates that this view is currently directly under the drag location in a - * drag-and-drop operation involving content that it can accept. Cleared when - * the drag exits the view, or when the drag operation concludes. - * @hide - */ - static final int DRAG_HOVERED = 0x00000002; - /** - * Indicates whether the view layout direction has been resolved and drawn to the - * right-to-left direction. - * - * @hide - */ - static final int LAYOUT_DIRECTION_RESOLVED_RTL = 0x00000004; - /** - * Indicates whether the view layout direction has been resolved. - * - * @hide - */ - static final int LAYOUT_DIRECTION_RESOLVED = 0x00000008; - /* End of masks for mPrivateFlags2 */ - static final int DRAG_MASK = DRAG_CAN_ACCEPT | DRAG_HOVERED; - /** - * Always allow a user to over-scroll this view, provided it is a - * view that can scroll. - * - * @see #getOverScrollMode() - * @see #setOverScrollMode(int) - */ - public static final int OVER_SCROLL_ALWAYS = 0; - /** - * Allow a user to over-scroll this view only if the content is large - * enough to meaningfully scroll, provided it is a view that can scroll. - * - * @see #getOverScrollMode() - * @see #setOverScrollMode(int) - */ - public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; - /** - * Never allow a user to over-scroll this view. - * - * @see #getOverScrollMode() - * @see #setOverScrollMode(int) - */ - public static final int OVER_SCROLL_NEVER = 2; - /** - * View has requested the system UI (status bar) to be visible (the default). - * - * @see #setSystemUiVisibility(int) - */ - public static final int SYSTEM_UI_FLAG_VISIBLE = 0; - /** - * View has requested the system UI to enter an unobtrusive "low profile" mode. - * - * This is for use in games, book readers, video players, or any other "immersive" application - * where the usual system chrome is deemed too distracting. - * - * In low profile mode, the status bar and/or navigation icons may dim. - * - * @see #setSystemUiVisibility(int) - */ - public static final int SYSTEM_UI_FLAG_LOW_PROFILE = 0x00000001; - /** - * View has requested that the system navigation be temporarily hidden. - * - * This is an even less obtrusive state than that called for by - * {@link #SYSTEM_UI_FLAG_LOW_PROFILE}; on devices that draw essential navigation controls - * (Home, Back, and the like) on screen, SYSTEM_UI_FLAG_HIDE_NAVIGATION will cause - * those to disappear. This is useful (in conjunction with the - * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN FLAG_FULLSCREEN} and - * {@link android.view.WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN FLAG_LAYOUT_IN_SCREEN} - * window flags) for displaying content using every last pixel on the display. - * - * There is a limitation: because navigation controls are so important, the least user - * interaction will cause them to reappear immediately. - * - * @see #setSystemUiVisibility(int) - */ - public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = 0x00000002; - /** - * @deprecated Use {@link #SYSTEM_UI_FLAG_LOW_PROFILE} instead. - */ - public static final int STATUS_BAR_HIDDEN = SYSTEM_UI_FLAG_LOW_PROFILE; - /** - * @deprecated Use {@link #SYSTEM_UI_FLAG_VISIBLE} instead. - */ - public static final int STATUS_BAR_VISIBLE = SYSTEM_UI_FLAG_VISIBLE; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to make the status bar not expandable. Unless you also - * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. - */ - public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to hide notification icons and scrolling ticker text. - */ - public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to disable incoming notification alerts. This will not block - * icons, but it will block sound, vibrating and other visual or aural notifications. - */ - public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to hide only the scrolling ticker. Note that - * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies - * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. - */ - public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to hide the center system info area. - */ - public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to hide only the home button. Don't use this - * unless you're a special part of the system UI (i.e., setup wizard, keyguard). - */ - public static final int STATUS_BAR_DISABLE_HOME = 0x00200000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to hide only the back button. Don't use this - * unless you're a special part of the system UI (i.e., setup wizard, keyguard). - */ - public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to hide only the clock. You might use this if your activity has - * its own clock making the status bar's clock redundant. - */ - public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked - * out of the public fields to keep the undefined bits out of the developer's way. - * - * Flag to hide only the recent apps button. Don't use this - * unless you're a special part of the system UI (i.e., setup wizard, keyguard). - */ - public static final int STATUS_BAR_DISABLE_RECENT = 0x01000000; - /** - * @hide - * - * NOTE: This flag may only be used in subtreeSystemUiVisibility, etc. etc. - * - * This hides HOME and RECENT and is provided for compatibility with interim implementations. - */ - @Deprecated - public static final int STATUS_BAR_DISABLE_NAVIGATION = - STATUS_BAR_DISABLE_HOME | STATUS_BAR_DISABLE_RECENT; - /** - * @hide - */ - public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = 0x0000FFFF; - /** - * These are the system UI flags that can be cleared by events outside - * of an application. Currently this is just the ability to tap on the - * screen while hiding the navigation bar to have it return. - * @hide - */ - public static final int SYSTEM_UI_CLEARABLE_FLAGS = - SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_HIDE_NAVIGATION; - /** - * Find views that render the specified text. - * - * @see #findViewsWithText(ArrayList, CharSequence, int) - */ - public static final int FIND_VIEWS_WITH_TEXT = 0x00000001; - /** - * Find find views that contain the specified content description. - * - * @see #findViewsWithText(ArrayList, CharSequence, int) - */ - public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 0x00000002; - /** - * Find views that contain {@link AccessibilityNodeProvider}. Such - * a View is a root of virtual view hierarchy and may contain the searched - * text. If this flag is set Views with providers are automatically - * added and it is a responsibility of the client to call the APIs of - * the provider to determine whether the virtual tree rooted at this View - * contains the text, i.e. getting the list of {@link AccessibilityNodeInfo}s - * represeting the virtual views with this text. - * - * @see #findViewsWithText(ArrayList, CharSequence, int) - * - * @hide - */ - public static final int FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS = 0x00000004; - /** - * Controls the over-scroll mode for this view. - * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, - * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, - * and {@link #OVER_SCROLL_NEVER}. - */ - private int mOverScrollMode; - /** - * The parent this view is attached to. - * {@hide} - * - * @see #getParent() - */ - protected ViewParent mParent; - /** - * {@hide} - */ - AttachInfo mAttachInfo; - /** - * {@hide} - */ - @ViewDebug.ExportedProperty(flagMapping = { - @ViewDebug.FlagToString(mask = FORCE_LAYOUT, equals = FORCE_LAYOUT, - name = "FORCE_LAYOUT"), - @ViewDebug.FlagToString(mask = LAYOUT_REQUIRED, equals = LAYOUT_REQUIRED, - name = "LAYOUT_REQUIRED"), - @ViewDebug.FlagToString(mask = DRAWING_CACHE_VALID, equals = DRAWING_CACHE_VALID, - name = "DRAWING_CACHE_INVALID", outputIf = false), - @ViewDebug.FlagToString(mask = DRAWN, equals = DRAWN, name = "DRAWN", outputIf = true), - @ViewDebug.FlagToString(mask = DRAWN, equals = DRAWN, name = "NOT_DRAWN", outputIf = false), - @ViewDebug.FlagToString(mask = DIRTY_MASK, equals = DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), - @ViewDebug.FlagToString(mask = DIRTY_MASK, equals = DIRTY, name = "DIRTY") - }) - int mPrivateFlags; - int mPrivateFlags2; - /** - * This view's request for the visibility of the status bar. - * @hide - */ - @ViewDebug.ExportedProperty(flagMapping = { - @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_LOW_PROFILE, - equals = SYSTEM_UI_FLAG_LOW_PROFILE, - name = "SYSTEM_UI_FLAG_LOW_PROFILE", outputIf = true), - @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_HIDE_NAVIGATION, - equals = SYSTEM_UI_FLAG_HIDE_NAVIGATION, - name = "SYSTEM_UI_FLAG_HIDE_NAVIGATION", outputIf = true), - @ViewDebug.FlagToString(mask = PUBLIC_STATUS_BAR_VISIBILITY_MASK, - equals = SYSTEM_UI_FLAG_VISIBLE, - name = "SYSTEM_UI_FLAG_VISIBLE", outputIf = true) - }) - int mSystemUiVisibility; - /** - * Count of how many windows this view has been attached to. - */ - int mWindowAttachCount; - /** - * The layout parameters associated with this view and used by the parent - * {@link android.view.ViewGroup} to determine how this view should be - * laid out. - * {@hide} - */ - protected ViewGroup.LayoutParams mLayoutParams; - /** - * The view flags hold various views states. - * {@hide} - */ - @ViewDebug.ExportedProperty - int mViewFlags; - static class TransformationInfo { - /** - * The transform matrix for the View. This transform is calculated internally - * based on the rotation, scaleX, and scaleY properties. The identity matrix - * is used by default. Do *not* use this variable directly; instead call - * getMatrix(), which will automatically recalculate the matrix if necessary - * to get the correct matrix based on the latest rotation and scale properties. - */ - private final Matrix mMatrix = new Matrix(); - /** - * The transform matrix for the View. This transform is calculated internally - * based on the rotation, scaleX, and scaleY properties. The identity matrix - * is used by default. Do *not* use this variable directly; instead call - * getInverseMatrix(), which will automatically recalculate the matrix if necessary - * to get the correct matrix based on the latest rotation and scale properties. - */ - private Matrix mInverseMatrix; - /** - * An internal variable that tracks whether we need to recalculate the - * transform matrix, based on whether the rotation or scaleX/Y properties - * have changed since the matrix was last calculated. - */ - boolean mMatrixDirty = false; - /** - * An internal variable that tracks whether we need to recalculate the - * transform matrix, based on whether the rotation or scaleX/Y properties - * have changed since the matrix was last calculated. - */ - private boolean mInverseMatrixDirty = true; - /** - * A variable that tracks whether we need to recalculate the - * transform matrix, based on whether the rotation or scaleX/Y properties - * have changed since the matrix was last calculated. This variable - * is only valid after a call to updateMatrix() or to a function that - * calls it such as getMatrix(), hasIdentityMatrix() and getInverseMatrix(). - */ - private boolean mMatrixIsIdentity = true; - /** - * The Camera object is used to compute a 3D matrix when rotationX or rotationY are set. - */ - private Camera mCamera = null; - /** - * This matrix is used when computing the matrix for 3D rotations. - */ - private Matrix matrix3D = null; - /** - * These prev values are used to recalculate a centered pivot point when necessary. The - * pivot point is only used in matrix operations (when rotation, scale, or translation are - * set), so thes values are only used then as well. - */ - private int mPrevWidth = -1; - private int mPrevHeight = -1; - - /** - * The degrees rotation around the vertical axis through the pivot point. - */ - @ViewDebug.ExportedProperty - float mRotationY = 0f; - /** - * The degrees rotation around the horizontal axis through the pivot point. - */ - @ViewDebug.ExportedProperty - float mRotationX = 0f; - /** - * The degrees rotation around the pivot point. - */ - @ViewDebug.ExportedProperty - float mRotation = 0f; - /** - * The amount of translation of the object away from its left property (post-layout). - */ - @ViewDebug.ExportedProperty - float mTranslationX = 0f; - /** - * The amount of translation of the object away from its top property (post-layout). - */ - @ViewDebug.ExportedProperty - float mTranslationY = 0f; - /** - * The amount of scale in the x direction around the pivot point. A - * value of 1 means no scaling is applied. - */ - @ViewDebug.ExportedProperty - float mScaleX = 1f; - /** - * The amount of scale in the y direction around the pivot point. A - * value of 1 means no scaling is applied. - */ - @ViewDebug.ExportedProperty - float mScaleY = 1f; - /** - * The x location of the point around which the view is rotated and scaled. - */ - @ViewDebug.ExportedProperty - float mPivotX = 0f; - /** - * The y location of the point around which the view is rotated and scaled. - */ - @ViewDebug.ExportedProperty - float mPivotY = 0f; - /** - * The opacity of the View. This is a value from 0 to 1, where 0 means - * completely transparent and 1 means completely opaque. - */ - @ViewDebug.ExportedProperty - float mAlpha = 1f; - } - TransformationInfo mTransformationInfo; - private boolean mLastIsOpaque; - /** - * Convenience value to check for float values that are close enough to zero to be considered - * zero. - */ - private static final float NONZERO_EPSILON = .001f; - /** - * The distance in pixels from the left edge of this view's parent - * to the left edge of this view. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "layout") - protected int mLeft; - /** - * The distance in pixels from the left edge of this view's parent - * to the right edge of this view. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "layout") - protected int mRight; - /** - * The distance in pixels from the top edge of this view's parent - * to the top edge of this view. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "layout") - protected int mTop; - /** - * The distance in pixels from the top edge of this view's parent - * to the bottom edge of this view. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "layout") - protected int mBottom; - /** - * The offset, in pixels, by which the content of this view is scrolled - * horizontally. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "scrolling") - protected int mScrollX; - /** - * The offset, in pixels, by which the content of this view is scrolled - * vertically. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "scrolling") - protected int mScrollY; - /** - * The left padding in pixels, that is the distance in pixels between the - * left edge of this view and the left edge of its content. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "padding") - protected int mPaddingLeft; - /** - * The right padding in pixels, that is the distance in pixels between the - * right edge of this view and the right edge of its content. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "padding") - protected int mPaddingRight; - /** - * The top padding in pixels, that is the distance in pixels between the - * top edge of this view and the top edge of its content. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "padding") - protected int mPaddingTop; - /** - * The bottom padding in pixels, that is the distance in pixels between the - * bottom edge of this view and the bottom edge of its content. - * {@hide} - */ - @ViewDebug.ExportedProperty(category = "padding") - protected int mPaddingBottom; - /** - * Briefly describes the view and is primarily used for accessibility support. - */ - private CharSequence mContentDescription; - /** - * Cache the paddingRight set by the user to append to the scrollbar's size. - * - * @hide - */ - @ViewDebug.ExportedProperty(category = "padding") - protected int mUserPaddingRight; - /** - * Cache the paddingBottom set by the user to append to the scrollbar's size. - * - * @hide - */ - @ViewDebug.ExportedProperty(category = "padding") - protected int mUserPaddingBottom; - /** - * Cache the paddingLeft set by the user to append to the scrollbar's size. - * - * @hide - */ - @ViewDebug.ExportedProperty(category = "padding") - protected int mUserPaddingLeft; - /** - * Cache if the user padding is relative. - * - */ - @ViewDebug.ExportedProperty(category = "padding") - boolean mUserPaddingRelative; - /** - * Cache the paddingStart set by the user to append to the scrollbar's size. - * - */ - @ViewDebug.ExportedProperty(category = "padding") - int mUserPaddingStart; - /** - * Cache the paddingEnd set by the user to append to the scrollbar's size. - * - */ - @ViewDebug.ExportedProperty(category = "padding") - int mUserPaddingEnd; - /** - * @hide - */ - int mOldWidthMeasureSpec = Integer.MIN_VALUE; - /** - * @hide - */ - int mOldHeightMeasureSpec = Integer.MIN_VALUE; - private Drawable mBGDrawable; - private int mBackgroundResource; - private boolean mBackgroundSizeChanged; - static class ListenerInfo { - /** - * Listener used to dispatch focus change events. - * This field should be made private, so it is hidden from the SDK. - * {@hide} - */ - protected OnFocusChangeListener mOnFocusChangeListener; - /** - * Listeners for layout change events. - */ - private ArrayList mOnLayoutChangeListeners; - /** - * Listeners for attach events. - */ - private CopyOnWriteArrayList mOnAttachStateChangeListeners; - /** - * Listener used to dispatch click events. - * This field should be made private, so it is hidden from the SDK. - * {@hide} - */ - public OnClickListener mOnClickListener; - /** - * Listener used to dispatch long click events. - * This field should be made private, so it is hidden from the SDK. - * {@hide} - */ - protected OnLongClickListener mOnLongClickListener; - /** - * Listener used to build the context menu. - * This field should be made private, so it is hidden from the SDK. - * {@hide} - */ - protected OnCreateContextMenuListener mOnCreateContextMenuListener; - private OnKeyListener mOnKeyListener; - private OnTouchListener mOnTouchListener; - private OnHoverListener mOnHoverListener; - private OnGenericMotionListener mOnGenericMotionListener; - private OnDragListener mOnDragListener; - private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; - } - ListenerInfo mListenerInfo; - /** - * The application environment this view lives in. - * This field should be made private, so it is hidden from the SDK. - * {@hide} - */ - protected Context mContext; - private final Resources mResources; - private ScrollabilityCache mScrollCache; - private int[] mDrawableState = null; - /** - * Set to true when drawing cache is enabled and cannot be created. - * - * @hide - */ - public boolean mCachingFailed; - private Bitmap mDrawingCache; - private Bitmap mUnscaledDrawingCache; - private HardwareLayer mHardwareLayer; - DisplayList mDisplayList; - /** - * When this view has focus and the next focus is {@link #FOCUS_LEFT}, - * the user may specify which view to go to next. - */ - private int mNextFocusLeftId = View.NO_ID; - /** - * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, - * the user may specify which view to go to next. - */ - private int mNextFocusRightId = View.NO_ID; - /** - * When this view has focus and the next focus is {@link #FOCUS_UP}, - * the user may specify which view to go to next. - */ - private int mNextFocusUpId = View.NO_ID; - /** - * When this view has focus and the next focus is {@link #FOCUS_DOWN}, - * the user may specify which view to go to next. - */ - private int mNextFocusDownId = View.NO_ID; - /** - * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, - * the user may specify which view to go to next. - */ - int mNextFocusForwardId = View.NO_ID; - private CheckForLongPress mPendingCheckForLongPress; - private CheckForTap mPendingCheckForTap = null; - private PerformClick mPerformClick; - private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; - private UnsetPressedState mUnsetPressedState; - /** - * Whether the long press's action has been invoked. The tap's action is invoked on the - * up event while a long press is invoked as soon as the long press duration is reached, so - * a long press could be performed before the tap is checked, in which case the tap's action - * should not be invoked. - */ - private boolean mHasPerformedLongPress; - /** - * The minimum height of the view. We'll try our best to have the height - * of this view to at least this amount. - */ - @ViewDebug.ExportedProperty(category = "measurement") - private int mMinHeight; - /** - * The minimum width of the view. We'll try our best to have the width - * of this view to at least this amount. - */ - @ViewDebug.ExportedProperty(category = "measurement") - private int mMinWidth; - /** - * The delegate to handle touch events that are physically in this view - * but should be handled by another view. - */ - private TouchDelegate mTouchDelegate = null; - /** - * Solid color to use as a background when creating the drawing cache. Enables - * the cache to use 16 bit bitmaps instead of 32 bit. - */ - private int mDrawingCacheBackgroundColor = 0; - /** - * Special tree observer used when mAttachInfo is null. - */ - private ViewTreeObserver mFloatingTreeObserver; - /** - * Cache the touch slop from the context that created the view. - */ - private int mTouchSlop; - /** - * Object that handles automatic animation of view properties. - */ - private ViewPropertyAnimator mAnimator = null; - /** - * Flag indicating that a drag can cross window boundaries. When - * {@link #startDrag(ClipData, DragShadowBuilder, Object, int)} is called - * with this flag set, all visible applications will be able to participate - * in the drag operation and receive the dragged content. - * - * @hide - */ - public static final int DRAG_FLAG_GLOBAL = 1; - /** - * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. - */ - private float mVerticalScrollFactor; - /** - * Position of the vertical scroll bar. - */ - private int mVerticalScrollbarPosition; - /** - * Position the scroll bar at the default position as determined by the system. - */ - public static final int SCROLLBAR_POSITION_DEFAULT = 0; - /** - * Position the scroll bar along the left edge. - */ - public static final int SCROLLBAR_POSITION_LEFT = 1; - /** - * Position the scroll bar along the right edge. - */ - public static final int SCROLLBAR_POSITION_RIGHT = 2; - /** - * Indicates that the view does not have a layer. - * - * @see #getLayerType() - * @see #setLayerType(int, android.graphics.Paint) - * @see #LAYER_TYPE_SOFTWARE - * @see #LAYER_TYPE_HARDWARE - */ - public static final int LAYER_TYPE_NONE = 0; - /** - *

Indicates that the view has a software layer. A software layer is backed - * by a bitmap and causes the view to be rendered using Android's software - * rendering pipeline, even if hardware acceleration is enabled.

- * - *

Software layers have various usages:

- *

When the application is not using hardware acceleration, a software layer - * is useful to apply a specific color filter and/or blending mode and/or - * translucency to a view and all its children.

- *

When the application is using hardware acceleration, a software layer - * is useful to render drawing primitives not supported by the hardware - * accelerated pipeline. It can also be used to cache a complex view tree - * into a texture and reduce the complexity of drawing operations. For instance, - * when animating a complex view tree with a translation, a software layer can - * be used to render the view tree only once.

- *

Software layers should be avoided when the affected view tree updates - * often. Every update will require to re-render the software layer, which can - * potentially be slow (particularly when hardware acceleration is turned on - * since the layer will have to be uploaded into a hardware texture after every - * update.)

- * - * @see #getLayerType() - * @see #setLayerType(int, android.graphics.Paint) - * @see #LAYER_TYPE_NONE - * @see #LAYER_TYPE_HARDWARE - */ - public static final int LAYER_TYPE_SOFTWARE = 1; - /** - *

Indicates that the view has a hardware layer. A hardware layer is backed - * by a hardware specific texture (generally Frame Buffer Objects or FBO on - * OpenGL hardware) and causes the view to be rendered using Android's hardware - * rendering pipeline, but only if hardware acceleration is turned on for the - * view hierarchy. When hardware acceleration is turned off, hardware layers - * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.

- * - *

A hardware layer is useful to apply a specific color filter and/or - * blending mode and/or translucency to a view and all its children.

- *

A hardware layer can be used to cache a complex view tree into a - * texture and reduce the complexity of drawing operations. For instance, - * when animating a complex view tree with a translation, a hardware layer can - * be used to render the view tree only once.

- *

A hardware layer can also be used to increase the rendering quality when - * rotation transformations are applied on a view. It can also be used to - * prevent potential clipping issues when applying 3D transforms on a view.

- * - * @see #getLayerType() - * @see #setLayerType(int, android.graphics.Paint) - * @see #LAYER_TYPE_NONE - * @see #LAYER_TYPE_SOFTWARE - */ - public static final int LAYER_TYPE_HARDWARE = 2; - @ViewDebug.ExportedProperty(category = "drawing", mapping = { - @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), - @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), - @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") - }) - int mLayerType = LAYER_TYPE_NONE; - Paint mLayerPaint; - Rect mLocalDirtyRect; - /** - * Set to true when the view is sending hover accessibility events because it - * is the innermost hovered view. - */ - private boolean mSendingHoverAccessibilityEvents; - /** - * Delegate for injecting accessiblity functionality. - */ - AccessibilityDelegate mAccessibilityDelegate; - /** - * Text direction is inherited thru {@link ViewGroup} - */ - public static final int TEXT_DIRECTION_INHERIT = 0; - /** - * Text direction is using "first strong algorithm". The first strong directional character - * determines the paragraph direction. If there is no strong directional character, the - * paragraph direction is the view's resolved layout direction. - * - */ - public static final int TEXT_DIRECTION_FIRST_STRONG = 1; - /** - * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains - * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. - * If there are neither, the paragraph direction is the view's resolved layout direction. - * - */ - public static final int TEXT_DIRECTION_ANY_RTL = 2; - /** - * Text direction is forced to LTR. - * - */ - public static final int TEXT_DIRECTION_LTR = 3; - /** - * Text direction is forced to RTL. - * - */ - public static final int TEXT_DIRECTION_RTL = 4; - /** - * Text direction is coming from the system Locale. - * - */ - public static final int TEXT_DIRECTION_LOCALE = 5; - /** - * Default text direction is inherited - * - */ - protected static int DEFAULT_TEXT_DIRECTION = TEXT_DIRECTION_INHERIT; - /** - * The text direction that has been defined by {@link #setTextDirection(int)}. - * - */ - @ViewDebug.ExportedProperty(category = "text", mapping = { - @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE") - }) - private int mTextDirection = DEFAULT_TEXT_DIRECTION; - /** - * The resolved text direction. This needs resolution if the value is - * TEXT_DIRECTION_INHERIT. The resolution matches mTextDirection if it is - * not TEXT_DIRECTION_INHERIT, otherwise resolution proceeds up the parent - * chain of the view. - * - */ - @ViewDebug.ExportedProperty(category = "text", mapping = { - @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), - @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE") - }) - private int mResolvedTextDirection = TEXT_DIRECTION_INHERIT; - /** - * Consistency verifier for debugging purposes. - * @hide - */ - protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = - InputEventConsistencyVerifier.isInstrumentationEnabled() ? - new InputEventConsistencyVerifier(this, 0) : null; - /** - * Simple constructor to use when creating a view from code. - * - * @param context The Context the view is running in, through which it can - * access the current theme, resources, etc. - */ - public View(Context context) { - mContext = context; - mResources = context != null ? context.getResources() : null; - mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED | LAYOUT_DIRECTION_INHERIT; - mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); - setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); - mUserPaddingStart = -1; - mUserPaddingEnd = -1; - mUserPaddingRelative = false; - } - /** - * Constructor that is called when inflating a view from XML. This is called - * when a view is being constructed from an XML file, supplying attributes - * that were specified in the XML file. This version uses a default style of - * 0, so the only attribute values applied are those in the Context's Theme - * and the given AttributeSet. - * - *

- * The method onFinishInflate() will be called after all children have been - * added. - * - * @param context The Context the view is running in, through which it can - * access the current theme, resources, etc. - * @param attrs The attributes of the XML tag that is inflating the view. - * @see #View(Context, AttributeSet, int) - */ - public View(Context context, AttributeSet attrs) { - this(context, attrs, 0); - } - /** - * Perform inflation from XML and apply a class-specific base style. This - * constructor of View allows subclasses to use their own base style when - * they are inflating. For example, a Button class's constructor would call - * this version of the super class constructor and supply - * R.attr.buttonStyle for defStyle; this allows - * the theme's button style to modify all of the base view attributes (in - * particular its background) as well as the Button class's attributes. - * - * @param context The Context the view is running in, through which it can - * access the current theme, resources, etc. - * @param attrs The attributes of the XML tag that is inflating the view. - * @param defStyle The default style to apply to this view. If 0, no style - * will be applied (beyond what is included in the theme). This may - * either be an attribute resource, whose value will be retrieved - * from the current theme, or an explicit style resource. - * @see #View(Context, AttributeSet) - */ - public View(Context context, AttributeSet attrs, int defStyle) { - this(context); - TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.View, - defStyle, 0); - Drawable background = null; - int leftPadding = -1; - int topPadding = -1; - int rightPadding = -1; - int bottomPadding = -1; - int startPadding = -1; - int endPadding = -1; - int padding = -1; - int viewFlagValues = 0; - int viewFlagMasks = 0; - boolean setScrollContainer = false; - int x = 0; - int y = 0; - float tx = 0; - float ty = 0; - float rotation = 0; - float rotationX = 0; - float rotationY = 0; - float sx = 1f; - float sy = 1f; - boolean transformSet = false; - int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; - int overScrollMode = mOverScrollMode; - final int N = a.getIndexCount(); - for (int i = 0; i < N; i++) { - int attr = a.getIndex(i); - switch (attr) { - case com.android.internal.R.styleable.View_background: - background = a.getDrawable(attr); - break; - case com.android.internal.R.styleable.View_padding: - padding = a.getDimensionPixelSize(attr, -1); - break; - case com.android.internal.R.styleable.View_paddingLeft: - leftPadding = a.getDimensionPixelSize(attr, -1); - break; - case com.android.internal.R.styleable.View_paddingTop: - topPadding = a.getDimensionPixelSize(attr, -1); - break; - case com.android.internal.R.styleable.View_paddingRight: - rightPadding = a.getDimensionPixelSize(attr, -1); - break; - case com.android.internal.R.styleable.View_paddingBottom: - bottomPadding = a.getDimensionPixelSize(attr, -1); - break; - case com.android.internal.R.styleable.View_paddingStart: - startPadding = a.getDimensionPixelSize(attr, -1); - break; - case com.android.internal.R.styleable.View_paddingEnd: - endPadding = a.getDimensionPixelSize(attr, -1); - break; - case com.android.internal.R.styleable.View_scrollX: - x = a.getDimensionPixelOffset(attr, 0); - break; - case com.android.internal.R.styleable.View_scrollY: - y = a.getDimensionPixelOffset(attr, 0); - break; - case com.android.internal.R.styleable.View_alpha: - setAlpha(a.getFloat(attr, 1f)); - break; - case com.android.internal.R.styleable.View_transformPivotX: - setPivotX(a.getDimensionPixelOffset(attr, 0)); - break; - case com.android.internal.R.styleable.View_transformPivotY: - setPivotY(a.getDimensionPixelOffset(attr, 0)); - break; - case com.android.internal.R.styleable.View_translationX: - tx = a.getDimensionPixelOffset(attr, 0); - transformSet = true; - break; - case com.android.internal.R.styleable.View_translationY: - ty = a.getDimensionPixelOffset(attr, 0); - transformSet = true; - break; - case com.android.internal.R.styleable.View_rotation: - rotation = a.getFloat(attr, 0); - transformSet = true; - break; - case com.android.internal.R.styleable.View_rotationX: - rotationX = a.getFloat(attr, 0); - transformSet = true; - break; - case com.android.internal.R.styleable.View_rotationY: - rotationY = a.getFloat(attr, 0); - transformSet = true; - break; - case com.android.internal.R.styleable.View_scaleX: - sx = a.getFloat(attr, 1f); - transformSet = true; - break; - case com.android.internal.R.styleable.View_scaleY: - sy = a.getFloat(attr, 1f); - transformSet = true; - break; - case com.android.internal.R.styleable.View_id: - mID = a.getResourceId(attr, NO_ID); - break; - case com.android.internal.R.styleable.View_tag: - mTag = a.getText(attr); - break; - case com.android.internal.R.styleable.View_fitsSystemWindows: - if (a.getBoolean(attr, false)) { - viewFlagValues |= FITS_SYSTEM_WINDOWS; - viewFlagMasks |= FITS_SYSTEM_WINDOWS; - } - break; - case com.android.internal.R.styleable.View_focusable: - if (a.getBoolean(attr, false)) { - viewFlagValues |= FOCUSABLE; - viewFlagMasks |= FOCUSABLE_MASK; - } - break; - case com.android.internal.R.styleable.View_focusableInTouchMode: - if (a.getBoolean(attr, false)) { - viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; - viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; - } - break; - case com.android.internal.R.styleable.View_clickable: - if (a.getBoolean(attr, false)) { - viewFlagValues |= CLICKABLE; - viewFlagMasks |= CLICKABLE; - } - break; - case com.android.internal.R.styleable.View_longClickable: - if (a.getBoolean(attr, false)) { - viewFlagValues |= LONG_CLICKABLE; - viewFlagMasks |= LONG_CLICKABLE; - } - break; - case com.android.internal.R.styleable.View_saveEnabled: - if (!a.getBoolean(attr, true)) { - viewFlagValues |= SAVE_DISABLED; - viewFlagMasks |= SAVE_DISABLED_MASK; - } - break; - case com.android.internal.R.styleable.View_duplicateParentState: - if (a.getBoolean(attr, false)) { - viewFlagValues |= DUPLICATE_PARENT_STATE; - viewFlagMasks |= DUPLICATE_PARENT_STATE; - } - break; - case com.android.internal.R.styleable.View_visibility: - final int visibility = a.getInt(attr, 0); - if (visibility != 0) { - viewFlagValues |= VISIBILITY_FLAGS[visibility]; - viewFlagMasks |= VISIBILITY_MASK; - } - break; - case com.android.internal.R.styleable.View_layoutDirection: - // Clear any HORIZONTAL_DIRECTION flag already set - viewFlagValues &= ~LAYOUT_DIRECTION_MASK; - // Set the HORIZONTAL_DIRECTION flags depending on the value of the attribute - final int layoutDirection = a.getInt(attr, -1); - if (layoutDirection != -1) { - viewFlagValues |= LAYOUT_DIRECTION_FLAGS[layoutDirection]; - } else { - // Set to default (LAYOUT_DIRECTION_INHERIT) - viewFlagValues |= LAYOUT_DIRECTION_DEFAULT; - } - viewFlagMasks |= LAYOUT_DIRECTION_MASK; - break; - case com.android.internal.R.styleable.View_drawingCacheQuality: - final int cacheQuality = a.getInt(attr, 0); - if (cacheQuality != 0) { - viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; - viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; - } - break; - case com.android.internal.R.styleable.View_contentDescription: - mContentDescription = a.getString(attr); - break; - case com.android.internal.R.styleable.View_soundEffectsEnabled: - if (!a.getBoolean(attr, true)) { - viewFlagValues &= ~SOUND_EFFECTS_ENABLED; - viewFlagMasks |= SOUND_EFFECTS_ENABLED; - } - break; - case com.android.internal.R.styleable.View_hapticFeedbackEnabled: - if (!a.getBoolean(attr, true)) { - viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; - viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; - } - break; - case R.styleable.View_scrollbars: - final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); - if (scrollbars != SCROLLBARS_NONE) { - viewFlagValues |= scrollbars; - viewFlagMasks |= SCROLLBARS_MASK; - initializeScrollbars(a); - } - break; - //noinspection deprecation - case R.styleable.View_fadingEdge: - if (context.getApplicationInfo().targetSdkVersion >= ICE_CREAM_SANDWICH) { - // Ignore the attribute starting with ICS - break; - } - // With builds < ICS, fall through and apply fading edges - case R.styleable.View_requiresFadingEdge: - final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); - if (fadingEdge != FADING_EDGE_NONE) { - viewFlagValues |= fadingEdge; - viewFlagMasks |= FADING_EDGE_MASK; - initializeFadingEdge(a); - } - break; - case R.styleable.View_scrollbarStyle: - scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); - if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { - viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; - viewFlagMasks |= SCROLLBARS_STYLE_MASK; - } - break; - case R.styleable.View_isScrollContainer: - setScrollContainer = true; - if (a.getBoolean(attr, false)) { - setScrollContainer(true); - } - break; - case com.android.internal.R.styleable.View_keepScreenOn: - if (a.getBoolean(attr, false)) { - viewFlagValues |= KEEP_SCREEN_ON; - viewFlagMasks |= KEEP_SCREEN_ON; - } - break; - case R.styleable.View_filterTouchesWhenObscured: - if (a.getBoolean(attr, false)) { - viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; - viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; - } - break; - case R.styleable.View_nextFocusLeft: - mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); - break; - case R.styleable.View_nextFocusRight: - mNextFocusRightId = a.getResourceId(attr, View.NO_ID); - break; - case R.styleable.View_nextFocusUp: - mNextFocusUpId = a.getResourceId(attr, View.NO_ID); - break; - case R.styleable.View_nextFocusDown: - mNextFocusDownId = a.getResourceId(attr, View.NO_ID); - break; - case R.styleable.View_nextFocusForward: - mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); - break; - case R.styleable.View_minWidth: - mMinWidth = a.getDimensionPixelSize(attr, 0); - break; - case R.styleable.View_minHeight: - mMinHeight = a.getDimensionPixelSize(attr, 0); - break; - case R.styleable.View_onClick: - if (context.isRestricted()) { - throw new IllegalStateException("The android:onClick attribute cannot " - + "be used within a restricted context"); - } - final String handlerName = a.getString(attr); - if (handlerName != null) { - setOnClickListener(new OnClickListener() { - private Method mHandler; - public void onClick(View v) { - if (mHandler == null) { - try { - mHandler = getContext().getClass().getMethod(handlerName, - View.class); - } catch (NoSuchMethodException e) { - int id = getId(); - String idText = id == NO_ID ? "" : " with id '" - + getContext().getResources().getResourceEntryName( - id) + "'"; - throw new IllegalStateException("Could not find a method " + - handlerName + "(View) in the activity " - + getContext().getClass() + " for onClick handler" - + " on view " + View.this.getClass() + idText, e); - } - } - try { - mHandler.invoke(getContext(), View.this); - } catch (IllegalAccessException e) { - throw new IllegalStateException("Could not execute non " - + "public method of the activity", e); - } catch (InvocationTargetException e) { - throw new IllegalStateException("Could not execute " - + "method of the activity", e); - } - } - }); - } - break; - case R.styleable.View_overScrollMode: - overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); - break; - case R.styleable.View_verticalScrollbarPosition: - mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); - break; - case R.styleable.View_layerType: - setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); - break; - case R.styleable.View_textDirection: - mTextDirection = a.getInt(attr, DEFAULT_TEXT_DIRECTION); - break; - } - } - a.recycle(); - setOverScrollMode(overScrollMode); - if (background != null) { - setBackgroundDrawable(background); - } - mUserPaddingRelative = (startPadding >= 0 || endPadding >= 0); - // Cache user padding as we cannot fully resolve padding here (we dont have yet the resolved - // layout direction). Those cached values will be used later during padding resolution. - mUserPaddingStart = startPadding; - mUserPaddingEnd = endPadding; - if (padding >= 0) { - leftPadding = padding; - topPadding = padding; - rightPadding = padding; - bottomPadding = padding; - } - // If the user specified the padding (either with android:padding or - // android:paddingLeft/Top/Right/Bottom), use this padding, otherwise - // use the default padding or the padding from the background drawable - // (stored at this point in mPadding*) - setPadding(leftPadding >= 0 ? leftPadding : mPaddingLeft, - topPadding >= 0 ? topPadding : mPaddingTop, - rightPadding >= 0 ? rightPadding : mPaddingRight, - bottomPadding >= 0 ? bottomPadding : mPaddingBottom); - if (viewFlagMasks != 0) { - setFlags(viewFlagValues, viewFlagMasks); - } - // Needs to be called after mViewFlags is set - if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { - recomputePadding(); - } - if (x != 0 || y != 0) { - scrollTo(x, y); - } - if (transformSet) { - setTranslationX(tx); - setTranslationY(ty); - setRotation(rotation); - setRotationX(rotationX); - setRotationY(rotationY); - setScaleX(sx); - setScaleY(sy); - } - if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { - setScrollContainer(true); - } - computeOpaqueFlags(); - } - /** - * Non-public constructor for use in testing - */ - View() { - mResources = null; - } - /** - *

- * Initializes the fading edges from a given set of styled attributes. This - * method should be called by subclasses that need fading edges and when an - * instance of these subclasses is created programmatically rather than - * being inflated from XML. This method is automatically called when the XML - * is inflated. - *

- * - * @param a the styled attributes set to initialize the fading edges from - */ - protected void initializeFadingEdge(TypedArray a) { - initScrollCache(); - mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( - R.styleable.View_fadingEdgeLength, - ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); - } - /** - * Returns the size of the vertical faded edges used to indicate that more - * content in this view is visible. - * - * @return The size in pixels of the vertical faded edge or 0 if vertical - * faded edges are not enabled for this view. - * @attr ref android.R.styleable#View_fadingEdgeLength - */ - public int getVerticalFadingEdgeLength() { - if (isVerticalFadingEdgeEnabled()) { - ScrollabilityCache cache = mScrollCache; - if (cache != null) { - return cache.fadingEdgeLength; - } - } - return 0; - } - /** - * Set the size of the faded edge used to indicate that more content in this - * view is available. Will not change whether the fading edge is enabled; use - * {@link #setVerticalFadingEdgeEnabled(boolean)} or - * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge - * for the vertical or horizontal fading edges. - * - * @param length The size in pixels of the faded edge used to indicate that more - * content in this view is visible. - */ - public void setFadingEdgeLength(int length) { - initScrollCache(); - mScrollCache.fadingEdgeLength = length; - } - /** - * Returns the size of the horizontal faded edges used to indicate that more - * content in this view is visible. - * - * @return The size in pixels of the horizontal faded edge or 0 if horizontal - * faded edges are not enabled for this view. - * @attr ref android.R.styleable#View_fadingEdgeLength - */ - public int getHorizontalFadingEdgeLength() { - if (isHorizontalFadingEdgeEnabled()) { - ScrollabilityCache cache = mScrollCache; - if (cache != null) { - return cache.fadingEdgeLength; - } - } - return 0; - } - /** - * Returns the width of the vertical scrollbar. - * - * @return The width in pixels of the vertical scrollbar or 0 if there - * is no vertical scrollbar. - */ - public int getVerticalScrollbarWidth() { - ScrollabilityCache cache = mScrollCache; - if (cache != null) { - ScrollBarDrawable scrollBar = cache.scrollBar; - if (scrollBar != null) { - int size = scrollBar.getSize(true); - if (size <= 0) { - size = cache.scrollBarSize; - } - return size; - } - return 0; - } - return 0; - } - /** - * Returns the height of the horizontal scrollbar. - * - * @return The height in pixels of the horizontal scrollbar or 0 if - * there is no horizontal scrollbar. - */ - protected int getHorizontalScrollbarHeight() { - ScrollabilityCache cache = mScrollCache; - if (cache != null) { - ScrollBarDrawable scrollBar = cache.scrollBar; - if (scrollBar != null) { - int size = scrollBar.getSize(false); - if (size <= 0) { - size = cache.scrollBarSize; - } - return size; - } - return 0; - } - return 0; - } - /** - *

- * Initializes the scrollbars from a given set of styled attributes. This - * method should be called by subclasses that need scrollbars and when an - * instance of these subclasses is created programmatically rather than - * being inflated from XML. This method is automatically called when the XML - * is inflated. - *

- * - * @param a the styled attributes set to initialize the scrollbars from - */ - protected void initializeScrollbars(TypedArray a) { - initScrollCache(); - final ScrollabilityCache scrollabilityCache = mScrollCache; - if (scrollabilityCache.scrollBar == null) { - scrollabilityCache.scrollBar = new ScrollBarDrawable(); - } - final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); - if (!fadeScrollbars) { - scrollabilityCache.state = ScrollabilityCache.ON; - } - scrollabilityCache.fadeScrollBars = fadeScrollbars; - scrollabilityCache.scrollBarFadeDuration = a.getInt( - R.styleable.View_scrollbarFadeDuration, ViewConfiguration - .getScrollBarFadeDuration()); - scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( - R.styleable.View_scrollbarDefaultDelayBeforeFade, - ViewConfiguration.getScrollDefaultDelay()); - scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( - com.android.internal.R.styleable.View_scrollbarSize, - ViewConfiguration.get(mContext).getScaledScrollBarSize()); - Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); - scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); - Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); - if (thumb != null) { - scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); - } - boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, - false); - if (alwaysDraw) { - scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); - } - track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); - scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); - thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); - if (thumb != null) { - scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); - } - alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, - false); - if (alwaysDraw) { - scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); - } - // Re-apply user/background padding so that scrollbar(s) get added - resolvePadding(); - } - /** - *

- * Initalizes the scrollability cache if necessary. - *

- */ - private void initScrollCache() { - if (mScrollCache == null) { - mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); - } - } - /** - * Set the position of the vertical scroll bar. Should be one of - * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or - * {@link #SCROLLBAR_POSITION_RIGHT}. - * - * @param position Where the vertical scroll bar should be positioned. - */ - public void setVerticalScrollbarPosition(int position) { - if (mVerticalScrollbarPosition != position) { - mVerticalScrollbarPosition = position; - computeOpaqueFlags(); - resolvePadding(); - } - } - /** - * @return The position where the vertical scroll bar will show, if applicable. - * @see #setVerticalScrollbarPosition(int) - */ - public int getVerticalScrollbarPosition() { - return mVerticalScrollbarPosition; - } - ListenerInfo getListenerInfo() { - if (mListenerInfo != null) { - return mListenerInfo; - } - mListenerInfo = new ListenerInfo(); - return mListenerInfo; - } - /** - * Register a callback to be invoked when focus of this view changed. - * - * @param l The callback that will run. - */ - public void setOnFocusChangeListener(OnFocusChangeListener l) { - getListenerInfo().mOnFocusChangeListener = l; - } - /** - * Add a listener that will be called when the bounds of the view change due to - * layout processing. - * - * @param listener The listener that will be called when layout bounds change. - */ - public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { - ListenerInfo li = getListenerInfo(); - if (li.mOnLayoutChangeListeners == null) { - li.mOnLayoutChangeListeners = new ArrayList(); - } - if (!li.mOnLayoutChangeListeners.contains(listener)) { - li.mOnLayoutChangeListeners.add(listener); - } - } - /** - * Remove a listener for layout changes. - * - * @param listener The listener for layout bounds change. - */ - public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { - ListenerInfo li = mListenerInfo; - if (li == null || li.mOnLayoutChangeListeners == null) { - return; - } - li.mOnLayoutChangeListeners.remove(listener); - } - /** - * Add a listener for attach state changes. - * - * This listener will be called whenever this view is attached or detached - * from a window. Remove the listener using - * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. - * - * @param listener Listener to attach - * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) - */ - public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { - ListenerInfo li = getListenerInfo(); - if (li.mOnAttachStateChangeListeners == null) { - li.mOnAttachStateChangeListeners - = new CopyOnWriteArrayList(); - } - li.mOnAttachStateChangeListeners.add(listener); - } - /** - * Remove a listener for attach state changes. The listener will receive no further - * notification of window attach/detach events. - * - * @param listener Listener to remove - * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) - */ - public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { - ListenerInfo li = mListenerInfo; - if (li == null || li.mOnAttachStateChangeListeners == null) { - return; - } - li.mOnAttachStateChangeListeners.remove(listener); - } - /** - * Returns the focus-change callback registered for this view. - * - * @return The callback, or null if one is not registered. - */ - public OnFocusChangeListener getOnFocusChangeListener() { - ListenerInfo li = mListenerInfo; - return li != null ? li.mOnFocusChangeListener : null; - } - /** - * Register a callback to be invoked when this view is clicked. If this view is not - * clickable, it becomes clickable. - * - * @param l The callback that will run - * - * @see #setClickable(boolean) - */ - public void setOnClickListener(OnClickListener l) { - if (!isClickable()) { - setClickable(true); - } - getListenerInfo().mOnClickListener = l; - } - /** - * Return whether this view has an attached OnClickListener. Returns - * true if there is a listener, false if there is none. - */ - public boolean hasOnClickListeners() { - ListenerInfo li = mListenerInfo; - return (li != null && li.mOnClickListener != null); - } - /** - * Register a callback to be invoked when this view is clicked and held. If this view is not - * long clickable, it becomes long clickable. - * - * @param l The callback that will run - * - * @see #setLongClickable(boolean) - */ - public void setOnLongClickListener(OnLongClickListener l) { - if (!isLongClickable()) { - setLongClickable(true); - } - getListenerInfo().mOnLongClickListener = l; - } - /** - * Register a callback to be invoked when the context menu for this view is - * being built. If this view is not long clickable, it becomes long clickable. - * - * @param l The callback that will run - * - */ - public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { - if (!isLongClickable()) { - setLongClickable(true); - } - getListenerInfo().mOnCreateContextMenuListener = l; - } - /** - * Call this view's OnClickListener, if it is defined. Performs all normal - * actions associated with clicking: reporting accessibility event, playing - * a sound, etc. - * - * @return True there was an assigned OnClickListener that was called, false - * otherwise is returned. - */ - public boolean performClick() { - sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnClickListener != null) { - playSoundEffect(SoundEffectConstants.CLICK); - li.mOnClickListener.onClick(this); - return true; - } - return false; - } - /** - * Directly call any attached OnClickListener. Unlike {@link #performClick()}, - * this only calls the listener, and does not do any associated clicking - * actions like reporting an accessibility event. - * - * @return True there was an assigned OnClickListener that was called, false - * otherwise is returned. - */ - public boolean callOnClick() { - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnClickListener != null) { - li.mOnClickListener.onClick(this); - return true; - } - return false; - } - /** - * Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the - * OnLongClickListener did not consume the event. - * - * @return True if one of the above receivers consumed the event, false otherwise. - */ - public boolean performLongClick() { - sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); - boolean handled = false; - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnLongClickListener != null) { - handled = li.mOnLongClickListener.onLongClick(View.this); - } - if (!handled) { - handled = showContextMenu(); - } - if (handled) { - performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); - } - return handled; - } - /** - * Performs button-related actions during a touch down event. - * - * @param event The event. - * @return True if the down was consumed. - * - * @hide - */ - protected boolean performButtonActionOnTouchDown(MotionEvent event) { - if ((event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { - if (showContextMenu(event.getX(), event.getY(), event.getMetaState())) { - return true; - } - } - return false; - } - /** - * Bring up the context menu for this view. - * - * @return Whether a context menu was displayed. - */ - public boolean showContextMenu() { - return getParent().showContextMenuForChild(this); - } - /** - * Bring up the context menu for this view, referring to the item under the specified point. - * - * @param x The referenced x coordinate. - * @param y The referenced y coordinate. - * @param metaState The keyboard modifiers that were pressed. - * @return Whether a context menu was displayed. - * - * @hide - */ - public boolean showContextMenu(float x, float y, int metaState) { - return showContextMenu(); - } - /** - * Start an action mode. - * - * @param callback Callback that will control the lifecycle of the action mode - * @return The new action mode if it is started, null otherwise - * - * @see ActionMode - */ - public ActionMode startActionMode(ActionMode.Callback callback) { - return getParent().startActionModeForChild(this, callback); - } - /** - * Register a callback to be invoked when a key is pressed in this view. - * @param l the key listener to attach to this view - */ - public void setOnKeyListener(OnKeyListener l) { - getListenerInfo().mOnKeyListener = l; - } - /** - * Register a callback to be invoked when a touch event is sent to this view. - * @param l the touch listener to attach to this view - */ - public void setOnTouchListener(OnTouchListener l) { - getListenerInfo().mOnTouchListener = l; - } - /** - * Register a callback to be invoked when a generic motion event is sent to this view. - * @param l the generic motion listener to attach to this view - */ - public void setOnGenericMotionListener(OnGenericMotionListener l) { - getListenerInfo().mOnGenericMotionListener = l; - } - /** - * Register a callback to be invoked when a hover event is sent to this view. - * @param l the hover listener to attach to this view - */ - public void setOnHoverListener(OnHoverListener l) { - getListenerInfo().mOnHoverListener = l; - } - /** - * Register a drag event listener callback object for this View. The parameter is - * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a - * View, the system calls the - * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. - * @param l An implementation of {@link android.view.View.OnDragListener}. - */ - public void setOnDragListener(OnDragListener l) { - getListenerInfo().mOnDragListener = l; - } - /** - * Give this view focus. This will cause - * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. - * - * Note: this does not check whether this {@link View} should get focus, it just - * gives it focus no matter what. It should only be called internally by framework - * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. - * - * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, - * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which - * focus moved when requestFocus() is called. It may not always - * apply, in which case use the default View.FOCUS_DOWN. - * @param previouslyFocusedRect The rectangle of the view that had focus - * prior in this View's coordinate system. - */ - void handleFocusGainInternal(int direction, Rect previouslyFocusedRect) { - if (DBG) { - System.out.println(this + " requestFocus()"); - } - if ((mPrivateFlags & FOCUSED) == 0) { - mPrivateFlags |= FOCUSED; - if (mParent != null) { - mParent.requestChildFocus(this, this); - } - onFocusChanged(true, direction, previouslyFocusedRect); - refreshDrawableState(); - } - } - /** - * Request that a rectangle of this view be visible on the screen, - * scrolling if necessary just enough. - * - *

A View should call this if it maintains some notion of which part - * of its content is interesting. For example, a text editing view - * should call this when its cursor moves. - * - * @param rectangle The rectangle. - * @return Whether any parent scrolled. - */ - public boolean requestRectangleOnScreen(Rect rectangle) { - return requestRectangleOnScreen(rectangle, false); - } - /** - * Request that a rectangle of this view be visible on the screen, - * scrolling if necessary just enough. - * - *

A View should call this if it maintains some notion of which part - * of its content is interesting. For example, a text editing view - * should call this when its cursor moves. - * - *

When immediate is set to true, scrolling will not be - * animated. - * - * @param rectangle The rectangle. - * @param immediate True to forbid animated scrolling, false otherwise - * @return Whether any parent scrolled. - */ - public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { - View child = this; - ViewParent parent = mParent; - boolean scrolled = false; - while (parent != null) { - scrolled |= parent.requestChildRectangleOnScreen(child, - rectangle, immediate); - // offset rect so next call has the rectangle in the - // coordinate system of its direct child. - rectangle.offset(child.getLeft(), child.getTop()); - rectangle.offset(-child.getScrollX(), -child.getScrollY()); - if (!(parent instanceof View)) { - break; - } - child = (View) parent; - parent = child.getParent(); - } - return scrolled; - } - /** - * Called when this view wants to give up focus. If focus is cleared - * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} is called. - *

- * Note: When a View clears focus the framework is trying - * to give focus to the first focusable View from the top. Hence, if this - * View is the first from the top that can take focus, then its focus will - * not be cleared nor will the focus change callback be invoked. - *

- */ - public void clearFocus() { - if (DBG) { - System.out.println(this + " clearFocus()"); - } - if ((mPrivateFlags & FOCUSED) != 0) { - mPrivateFlags &= ~FOCUSED; - if (mParent != null) { - mParent.clearChildFocus(this); - } - onFocusChanged(false, 0, null); - refreshDrawableState(); - } - } - /** - * Called to clear the focus of a view that is about to be removed. - * Doesn't call clearChildFocus, which prevents this view from taking - * focus again before it has been removed from the parent - */ - void clearFocusForRemoval() { - if ((mPrivateFlags & FOCUSED) != 0) { - mPrivateFlags &= ~FOCUSED; - onFocusChanged(false, 0, null); - refreshDrawableState(); - // The view cleared focus and invoked the callbacks, so now is the - // time to give focus to the the first focusable from the top to - // ensure that the gain focus is announced after clear focus. - getRootView().requestFocus(FOCUS_FORWARD); - } - } - /** - * Called internally by the view system when a new view is getting focus. - * This is what clears the old focus. - */ - void unFocus() { - if (DBG) { - System.out.println(this + " unFocus()"); - } - if ((mPrivateFlags & FOCUSED) != 0) { - mPrivateFlags &= ~FOCUSED; - onFocusChanged(false, 0, null); - refreshDrawableState(); - } - } - /** - * Returns true if this view has focus iteself, or is the ancestor of the - * view that has focus. - * - * @return True if this view has or contains focus, false otherwise. - */ - @ViewDebug.ExportedProperty(category = "focus") - public boolean hasFocus() { - return (mPrivateFlags & FOCUSED) != 0; - } - /** - * Returns true if this view is focusable or if it contains a reachable View - * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" - * is a View whose parents do not block descendants focus. - * - * Only {@link #VISIBLE} views are considered focusable. - * - * @return True if the view is focusable or if the view contains a focusable - * View, false otherwise. - * - * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS - */ - public boolean hasFocusable() { - return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); - } - /** - * Called by the view system when the focus state of this view changes. - * When the focus change event is caused by directional navigation, direction - * and previouslyFocusedRect provide insight into where the focus is coming from. - * When overriding, be sure to call up through to the super class so that - * the standard focus handling will occur. - * - * @param gainFocus True if the View has focus; false otherwise. - * @param direction The direction focus has moved when requestFocus() - * is called to give this view focus. Values are - * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, - * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. - * It may not always apply, in which case use the default. - * @param previouslyFocusedRect The rectangle, in this view's coordinate - * system, of the previously focused view. If applicable, this will be - * passed in as finer grained information about where the focus is coming - * from (in addition to direction). Will be null otherwise. - */ - protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { - if (gainFocus) { - sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); - } - InputMethodManager imm = InputMethodManager.peekInstance(); - if (!gainFocus) { - if (isPressed()) { - setPressed(false); - } - if (imm != null && mAttachInfo != null - && mAttachInfo.mHasWindowFocus) { - imm.focusOut(this); - } - onFocusLost(); - } else if (imm != null && mAttachInfo != null - && mAttachInfo.mHasWindowFocus) { - imm.focusIn(this); - } - invalidate(true); - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnFocusChangeListener != null) { - li.mOnFocusChangeListener.onFocusChange(this, gainFocus); - } - if (mAttachInfo != null) { - mAttachInfo.mKeyDispatchState.reset(this); - } - } - /** - * Sends an accessibility event of the given type. If accessiiblity is - * not enabled this method has no effect. The default implementation calls - * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first - * to populate information about the event source (this View), then calls - * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to - * populate the text content of the event source including its descendants, - * and last calls - * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} - * on its parent to resuest sending of the event to interested parties. - *

- * If an {@link AccessibilityDelegate} has been specified via calling - * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its - * {@link AccessibilityDelegate#sendAccessibilityEvent(View, int)} is - * responsible for handling this call. - *

- * - * @param eventType The type of the event to send, as defined by several types from - * {@link android.view.accessibility.AccessibilityEvent}, such as - * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_CLICKED} or - * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_HOVER_ENTER}. - * - * @see #onInitializeAccessibilityEvent(AccessibilityEvent) - * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) - * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) - * @see AccessibilityDelegate - */ - public void sendAccessibilityEvent(int eventType) { - if (mAccessibilityDelegate != null) { - mAccessibilityDelegate.sendAccessibilityEvent(this, eventType); - } else { - sendAccessibilityEventInternal(eventType); - } - } - /** - * @see #sendAccessibilityEvent(int) - * - * Note: Called from the default {@link AccessibilityDelegate}. - */ - void sendAccessibilityEventInternal(int eventType) { - if (AccessibilityManager.getInstance(mContext).isEnabled()) { - sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); - } - } - /** - * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but - * takes as an argument an empty {@link AccessibilityEvent} and does not - * perform a check whether accessibility is enabled. - *

- * If an {@link AccessibilityDelegate} has been specified via calling - * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its - * {@link AccessibilityDelegate#sendAccessibilityEventUnchecked(View, AccessibilityEvent)} - * is responsible for handling this call. - *

- * - * @param event The event to send. - * - * @see #sendAccessibilityEvent(int) - */ - public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { - if (mAccessibilityDelegate != null) { - mAccessibilityDelegate.sendAccessibilityEventUnchecked(this, event); - } else { - sendAccessibilityEventUncheckedInternal(event); - } - } - /** - * @see #sendAccessibilityEventUnchecked(AccessibilityEvent) - * - * Note: Called from the default {@link AccessibilityDelegate}. - */ - void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) { - if (!isShown()) { - return; - } - onInitializeAccessibilityEvent(event); - // Only a subset of accessibility events populates text content. - if ((event.getEventType() & POPULATING_ACCESSIBILITY_EVENT_TYPES) != 0) { - dispatchPopulateAccessibilityEvent(event); - } - // In the beginning we called #isShown(), so we know that getParent() is not null. - getParent().requestSendAccessibilityEvent(this, event); - } - /** - * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then - * to its children for adding their text content to the event. Note that the - * event text is populated in a separate dispatch path since we add to the - * event not only the text of the source but also the text of all its descendants. - * A typical implementation will call - * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view - * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} - * on each child. Override this method if custom population of the event text - * content is required. - *

- * If an {@link AccessibilityDelegate} has been specified via calling - * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its - * {@link AccessibilityDelegate#dispatchPopulateAccessibilityEvent(View, AccessibilityEvent)} - * is responsible for handling this call. - *

- *

- * Note: Accessibility events of certain types are not dispatched for - * populating the event text via this method. For details refer to {@link AccessibilityEvent}. - *

- * - * @param event The event. - * - * @return True if the event population was completed. - */ - public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { - if (mAccessibilityDelegate != null) { - return mAccessibilityDelegate.dispatchPopulateAccessibilityEvent(this, event); - } else { - return dispatchPopulateAccessibilityEventInternal(event); - } - } - /** - * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) - * - * Note: Called from the default {@link AccessibilityDelegate}. - */ - boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) { - onPopulateAccessibilityEvent(event); - return false; - } - /** - * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} - * giving a chance to this View to populate the accessibility event with its - * text content. While this method is free to modify event - * attributes other than text content, doing so should normally be performed in - * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. - *

- * Example: Adding formatted date string to an accessibility event in addition - * to the text added by the super implementation: - * 

 public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
-     *     super.onPopulateAccessibilityEvent(event);
-     *     final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY;
-     *     String selectedDateUtterance = DateUtils.formatDateTime(mContext,
-     *         mCurrentDate.getTimeInMillis(), flags);
-     *     event.getText().add(selectedDateUtterance);
-     * }
- *

- * If an {@link AccessibilityDelegate} has been specified via calling - * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its - * {@link AccessibilityDelegate#onPopulateAccessibilityEvent(View, AccessibilityEvent)} - * is responsible for handling this call. - *

- *

Note: Always call the super implementation before adding - * information to the event, in case the default implementation has basic information to add. - *

- * - * @param event The accessibility event which to populate. - * - * @see #sendAccessibilityEvent(int) - * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) - */ - public void onPopulateAccessibilityEvent(AccessibilityEvent event) { - if (mAccessibilityDelegate != null) { - mAccessibilityDelegate.onPopulateAccessibilityEvent(this, event); - } else { - onPopulateAccessibilityEventInternal(event); - } - } - /** - * @see #onPopulateAccessibilityEvent(AccessibilityEvent) - * - * Note: Called from the default {@link AccessibilityDelegate}. - */ - void onPopulateAccessibilityEventInternal(AccessibilityEvent event) { - } - /** - * Initializes an {@link AccessibilityEvent} with information about - * this View which is the event source. In other words, the source of - * an accessibility event is the view whose state change triggered firing - * the event. - *

- * Example: Setting the password property of an event in addition - * to properties set by the super implementation: - * 

 public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
-     *     super.onInitializeAccessibilityEvent(event);
-     *     event.setPassword(true);
-     * }
- *

- * If an {@link AccessibilityDelegate} has been specified via calling - * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its - * {@link AccessibilityDelegate#onInitializeAccessibilityEvent(View, AccessibilityEvent)} - * is responsible for handling this call. - *

- *

Note: Always call the super implementation before adding - * information to the event, in case the default implementation has basic information to add. - *

- * @param event The event to initialize. - * - * @see #sendAccessibilityEvent(int) - * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) - */ - public void onInitializeAccessibilityEvent(AccessibilityEvent event) { - if (mAccessibilityDelegate != null) { - mAccessibilityDelegate.onInitializeAccessibilityEvent(this, event); - } else { - onInitializeAccessibilityEventInternal(event); - } - } - /** - * @see #onInitializeAccessibilityEvent(AccessibilityEvent) - * - * Note: Called from the default {@link AccessibilityDelegate}. - */ - void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { - event.setSource(this); - event.setClassName(View.class.getName()); - event.setPackageName(getContext().getPackageName()); - event.setEnabled(isEnabled()); - event.setContentDescription(mContentDescription); - if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED && mAttachInfo != null) { - ArrayList focusablesTempList = mAttachInfo.mFocusablesTempList; - getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, - FOCUSABLES_ALL); - event.setItemCount(focusablesTempList.size()); - event.setCurrentItemIndex(focusablesTempList.indexOf(this)); - focusablesTempList.clear(); - } - } - /** - * Returns an {@link AccessibilityNodeInfo} representing this view from the - * point of view of an {@link android.accessibilityservice.AccessibilityService}. - * This method is responsible for obtaining an accessibility node info from a - * pool of reusable instances and calling - * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to - * initialize the former. - *

- * Note: The client is responsible for recycling the obtained instance by calling - * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. - *

- * - * @return A populated {@link AccessibilityNodeInfo}. - * - * @see AccessibilityNodeInfo - */ - public AccessibilityNodeInfo createAccessibilityNodeInfo() { - AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); - if (provider != null) { - return provider.createAccessibilityNodeInfo(View.NO_ID); - } else { - AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); - onInitializeAccessibilityNodeInfo(info); - return info; - } - } - /** - * Initializes an {@link AccessibilityNodeInfo} with information about this view. - * The base implementation sets: - *
    - *
  • {@link AccessibilityNodeInfo#setParent(View)},
    • - *
  • {@link AccessibilityNodeInfo#setBoundsInParent(Rect)},
    • - *
  • {@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},
    • - *
  • {@link AccessibilityNodeInfo#setPackageName(CharSequence)},
    • - *
  • {@link AccessibilityNodeInfo#setClassName(CharSequence)},
    • - *
  • {@link AccessibilityNodeInfo#setContentDescription(CharSequence)},
    • - *
  • {@link AccessibilityNodeInfo#setEnabled(boolean)},
    • - *
  • {@link AccessibilityNodeInfo#setClickable(boolean)},
    • - *
  • {@link AccessibilityNodeInfo#setFocusable(boolean)},
    • - *
  • {@link AccessibilityNodeInfo#setFocused(boolean)},
    • - *
  • {@link AccessibilityNodeInfo#setLongClickable(boolean)},
    • - *
  • {@link AccessibilityNodeInfo#setSelected(boolean)},
    • - *
- *

- * Subclasses should override this method, call the super implementation, - * and set additional attributes. - *

- *

- * If an {@link AccessibilityDelegate} has been specified via calling - * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its - * {@link AccessibilityDelegate#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo)} - * is responsible for handling this call. - *

- * - * @param info The instance to initialize. - */ - public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { - if (mAccessibilityDelegate != null) { - mAccessibilityDelegate.onInitializeAccessibilityNodeInfo(this, info); - } else { - onInitializeAccessibilityNodeInfoInternal(info); - } - } - /** - * @see #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) - * - * Note: Called from the default {@link AccessibilityDelegate}. - */ - void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { - Rect bounds = mAttachInfo.mTmpInvalRect; - getDrawingRect(bounds); - info.setBoundsInParent(bounds); - int[] locationOnScreen = mAttachInfo.mInvalidateChildLocation; - getLocationOnScreen(locationOnScreen); - bounds.offsetTo(0, 0); - bounds.offset(locationOnScreen[0], locationOnScreen[1]); - info.setBoundsInScreen(bounds); - if ((mPrivateFlags & IS_ROOT_NAMESPACE) == 0) { - ViewParent parent = getParent(); - if (parent instanceof View) { - View parentView = (View) parent; - info.setParent(parentView); - } - } - info.setPackageName(mContext.getPackageName()); - info.setClassName(View.class.getName()); - info.setContentDescription(getContentDescription()); - info.setEnabled(isEnabled()); - info.setClickable(isClickable()); - info.setFocusable(isFocusable()); - info.setFocused(isFocused()); - info.setSelected(isSelected()); - info.setLongClickable(isLongClickable()); - // TODO: These make sense only if we are in an AdapterView but all - // views can be selected. Maybe from accessiiblity perspective - // we should report as selectable view in an AdapterView. - info.addAction(AccessibilityNodeInfo.ACTION_SELECT); - info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); - if (isFocusable()) { - if (isFocused()) { - info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); - } else { - info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); - } - } - } - /** - * Sets a delegate for implementing accessibility support via compositon as - * opposed to inheritance. The delegate's primary use is for implementing - * backwards compatible widgets. For more details see {@link AccessibilityDelegate}. - * - * @param delegate The delegate instance. - * - * @see AccessibilityDelegate - */ - public void setAccessibilityDelegate(AccessibilityDelegate delegate) { - mAccessibilityDelegate = delegate; - } - /** - * Gets the provider for managing a virtual view hierarchy rooted at this View - * and reported to {@link android.accessibilityservice.AccessibilityService}s - * that explore the window content. - *

- * If this method returns an instance, this instance is responsible for managing - * {@link AccessibilityNodeInfo}s describing the virtual sub-tree rooted at this - * View including the one representing the View itself. Similarly the returned - * instance is responsible for performing accessibility actions on any virtual - * view or the root view itself. - *

- *

- * If an {@link AccessibilityDelegate} has been specified via calling - * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its - * {@link AccessibilityDelegate#getAccessibilityNodeProvider(View)} - * is responsible for handling this call. - *

- * - * @return The provider. - * - * @see AccessibilityNodeProvider - */ - public AccessibilityNodeProvider getAccessibilityNodeProvider() { - if (mAccessibilityDelegate != null) { - return mAccessibilityDelegate.getAccessibilityNodeProvider(this); - } else { - return null; - } - } - /** - * Gets the unique identifier of this view on the screen for accessibility purposes. - * If this {@link View} is not attached to any window, {@value #NO_ID} is returned. - * - * @return The view accessibility id. - * - * @hide - */ - public int getAccessibilityViewId() { - if (mAccessibilityViewId == NO_ID) { - mAccessibilityViewId = sNextAccessibilityViewId++; - } - return mAccessibilityViewId; - } - /** - * Gets the unique identifier of the window in which this View reseides. - * - * @return The window accessibility id. - * - * @hide - */ - public int getAccessibilityWindowId() { - return mAttachInfo != null ? mAttachInfo.mAccessibilityWindowId : NO_ID; - } - /** - * Gets the {@link View} description. It briefly describes the view and is - * primarily used for accessibility support. Set this property to enable - * better accessibility support for your application. This is especially - * true for views that do not have textual representation (For example, - * ImageButton). - * - * @return The content descriptiopn. - * - * @attr ref android.R.styleable#View_contentDescription - */ - public CharSequence getContentDescription() { - return mContentDescription; - } - /** - * Sets the {@link View} description. It briefly describes the view and is - * primarily used for accessibility support. Set this property to enable - * better accessibility support for your application. This is especially - * true for views that do not have textual representation (For example, - * ImageButton). - * - * @param contentDescription The content description. - * - * @attr ref android.R.styleable#View_contentDescription - */ - @RemotableViewMethod - public void setContentDescription(CharSequence contentDescription) { - mContentDescription = contentDescription; - } - /** - * Invoked whenever this view loses focus, either by losing window focus or by losing - * focus within its window. This method can be used to clear any state tied to the - * focus. For instance, if a button is held pressed with the trackball and the window - * loses focus, this method can be used to cancel the press. - * - * Subclasses of View overriding this method should always call super.onFocusLost(). - * - * @see #onFocusChanged(boolean, int, android.graphics.Rect) - * @see #onWindowFocusChanged(boolean) - * - * @hide pending API council approval - */ - protected void onFocusLost() { - resetPressedState(); - } - private void resetPressedState() { - if ((mViewFlags & ENABLED_MASK) == DISABLED) { - return; - } - if (isPressed()) { - setPressed(false); - if (!mHasPerformedLongPress) { - removeLongPressCallback(); - } - } - } - /** - * Returns true if this view has focus - * - * @return True if this view has focus, false otherwise. - */ - @ViewDebug.ExportedProperty(category = "focus") - public boolean isFocused() { - return (mPrivateFlags & FOCUSED) != 0; - } - /** - * Find the view in the hierarchy rooted at this view that currently has - * focus. - * - * @return The view that currently has focus, or null if no focused view can - * be found. - */ - public View findFocus() { - return (mPrivateFlags & FOCUSED) != 0 ? this : null; - } - /** - * Change whether this view is one of the set of scrollable containers in - * its window. This will be used to determine whether the window can - * resize or must pan when a soft input area is open -- scrollable - * containers allow the window to use resize mode since the container - * will appropriately shrink. - */ - public void setScrollContainer(boolean isScrollContainer) { - if (isScrollContainer) { - if (mAttachInfo != null && (mPrivateFlags&SCROLL_CONTAINER_ADDED) == 0) { - mAttachInfo.mScrollContainers.add(this); - mPrivateFlags |= SCROLL_CONTAINER_ADDED; - } - mPrivateFlags |= SCROLL_CONTAINER; - } else { - if ((mPrivateFlags&SCROLL_CONTAINER_ADDED) != 0) { - mAttachInfo.mScrollContainers.remove(this); - } - mPrivateFlags &= ~(SCROLL_CONTAINER|SCROLL_CONTAINER_ADDED); - } - } - /** - * Returns the quality of the drawing cache. - * - * @return One of {@link #DRAWING_CACHE_QUALITY_AUTO}, - * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} - * - * @see #setDrawingCacheQuality(int) - * @see #setDrawingCacheEnabled(boolean) - * @see #isDrawingCacheEnabled() - * - * @attr ref android.R.styleable#View_drawingCacheQuality - */ - public int getDrawingCacheQuality() { - return mViewFlags & DRAWING_CACHE_QUALITY_MASK; - } - /** - * Set the drawing cache quality of this view. This value is used only when the - * drawing cache is enabled - * - * @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO}, - * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} - * - * @see #getDrawingCacheQuality() - * @see #setDrawingCacheEnabled(boolean) - * @see #isDrawingCacheEnabled() - * - * @attr ref android.R.styleable#View_drawingCacheQuality - */ - public void setDrawingCacheQuality(int quality) { - setFlags(quality, DRAWING_CACHE_QUALITY_MASK); - } - /** - * Returns whether the screen should remain on, corresponding to the current - * value of {@link #KEEP_SCREEN_ON}. - * - * @return Returns true if {@link #KEEP_SCREEN_ON} is set. - * - * @see #setKeepScreenOn(boolean) - * - * @attr ref android.R.styleable#View_keepScreenOn - */ - public boolean getKeepScreenOn() { - return (mViewFlags & KEEP_SCREEN_ON) != 0; - } - /** - * Controls whether the screen should remain on, modifying the - * value of {@link #KEEP_SCREEN_ON}. - * - * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}. - * - * @see #getKeepScreenOn() - * - * @attr ref android.R.styleable#View_keepScreenOn - */ - public void setKeepScreenOn(boolean keepScreenOn) { - setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON); - } - /** - * Gets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. - * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusLeft - */ - public int getNextFocusLeftId() { - return mNextFocusLeftId; - } - /** - * Sets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. - * @param nextFocusLeftId The next focus ID, or {@link #NO_ID} if the framework should - * decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusLeft - */ - public void setNextFocusLeftId(int nextFocusLeftId) { - mNextFocusLeftId = nextFocusLeftId; - } - /** - * Gets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. - * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusRight - */ - public int getNextFocusRightId() { - return mNextFocusRightId; - } - /** - * Sets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. - * @param nextFocusRightId The next focus ID, or {@link #NO_ID} if the framework should - * decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusRight - */ - public void setNextFocusRightId(int nextFocusRightId) { - mNextFocusRightId = nextFocusRightId; - } - /** - * Gets the id of the view to use when the next focus is {@link #FOCUS_UP}. - * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusUp - */ - public int getNextFocusUpId() { - return mNextFocusUpId; - } - /** - * Sets the id of the view to use when the next focus is {@link #FOCUS_UP}. - * @param nextFocusUpId The next focus ID, or {@link #NO_ID} if the framework should - * decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusUp - */ - public void setNextFocusUpId(int nextFocusUpId) { - mNextFocusUpId = nextFocusUpId; - } - /** - * Gets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. - * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusDown - */ - public int getNextFocusDownId() { - return mNextFocusDownId; - } - /** - * Sets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. - * @param nextFocusDownId The next focus ID, or {@link #NO_ID} if the framework should - * decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusDown - */ - public void setNextFocusDownId(int nextFocusDownId) { - mNextFocusDownId = nextFocusDownId; - } - /** - * Gets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. - * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusForward - */ - public int getNextFocusForwardId() { - return mNextFocusForwardId; - } - /** - * Sets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. - * @param nextFocusForwardId The next focus ID, or {@link #NO_ID} if the framework should - * decide automatically. - * - * @attr ref android.R.styleable#View_nextFocusForward - */ - public void setNextFocusForwardId(int nextFocusForwardId) { - mNextFocusForwardId = nextFocusForwardId; - } - /** - * Returns the visibility of this view and all of its ancestors - * - * @return True if this view and all of its ancestors are {@link #VISIBLE} - */ - public boolean isShown() { - View current = this; - //noinspection ConstantConditions - do { - if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) { - return false; - } - ViewParent parent = current.mParent; - if (parent == null) { - return false; // We are not attached to the view root - } - if (!(parent instanceof View)) { - return true; - } - current = (View) parent; - } while (current != null); - return false; - } - /** - * Apply the insets for system windows to this view, if the FITS_SYSTEM_WINDOWS flag - * is set - * - * @param insets Insets for system windows - * - * @return True if this view applied the insets, false otherwise - */ - protected boolean fitSystemWindows(Rect insets) { - if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) { - mPaddingLeft = insets.left; - mPaddingTop = insets.top; - mPaddingRight = insets.right; - mPaddingBottom = insets.bottom; - requestLayout(); - return true; - } - return false; - } - /** - * Set whether or not this view should account for system screen decorations - * such as the status bar and inset its content. This allows this view to be - * positioned in absolute screen coordinates and remain visible to the user. - * - *

This should only be used by top-level window decor views. - * - * @param fitSystemWindows true to inset content for system screen decorations, false for - * default behavior. - * - * @attr ref android.R.styleable#View_fitsSystemWindows - */ - public void setFitsSystemWindows(boolean fitSystemWindows) { - setFlags(fitSystemWindows ? FITS_SYSTEM_WINDOWS : 0, FITS_SYSTEM_WINDOWS); - } - /** - * Check for the FITS_SYSTEM_WINDOWS flag. If this method returns true, this view - * will account for system screen decorations such as the status bar and inset its - * content. This allows the view to be positioned in absolute screen coordinates - * and remain visible to the user. - * - * @return true if this view will adjust its content bounds for system screen decorations. - * - * @attr ref android.R.styleable#View_fitsSystemWindows - */ - public boolean fitsSystemWindows() { - return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS; - } - /** - * Returns the visibility status for this view. - * - * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. - * @attr ref android.R.styleable#View_visibility - */ - @ViewDebug.ExportedProperty(mapping = { - @ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"), - @ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"), - @ViewDebug.IntToString(from = GONE, to = "GONE") - }) - public int getVisibility() { - return mViewFlags & VISIBILITY_MASK; - } - /** - * Set the enabled state of this view. - * - * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. - * @attr ref android.R.styleable#View_visibility - */ - @RemotableViewMethod - public void setVisibility(int visibility) { - setFlags(visibility, VISIBILITY_MASK); - if (mBGDrawable != null) mBGDrawable.setVisible(visibility == VISIBLE, false); - } - /** - * Returns the enabled status for this view. The interpretation of the - * enabled state varies by subclass. - * - * @return True if this view is enabled, false otherwise. - */ - @ViewDebug.ExportedProperty - public boolean isEnabled() { - return (mViewFlags & ENABLED_MASK) == ENABLED; - } - /** - * Set the enabled state of this view. The interpretation of the enabled - * state varies by subclass. - * - * @param enabled True if this view is enabled, false otherwise. - */ - @RemotableViewMethod - public void setEnabled(boolean enabled) { - if (enabled == isEnabled()) return; - setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK); - /* - * The View most likely has to change its appearance, so refresh - * the drawable state. - */ - refreshDrawableState(); - // Invalidate too, since the default behavior for views is to be - // be drawn at 50% alpha rather than to change the drawable. - invalidate(true); - } - /** - * Set whether this view can receive the focus. - * - * Setting this to false will also ensure that this view is not focusable - * in touch mode. - * - * @param focusable If true, this view can receive the focus. - * - * @see #setFocusableInTouchMode(boolean) - * @attr ref android.R.styleable#View_focusable - */ - public void setFocusable(boolean focusable) { - if (!focusable) { - setFlags(0, FOCUSABLE_IN_TOUCH_MODE); - } - setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK); - } - /** - * Set whether this view can receive focus while in touch mode. - * - * Setting this to true will also ensure that this view is focusable. - * - * @param focusableInTouchMode If true, this view can receive the focus while - * in touch mode. - * - * @see #setFocusable(boolean) - * @attr ref android.R.styleable#View_focusableInTouchMode - */ - public void setFocusableInTouchMode(boolean focusableInTouchMode) { - // Focusable in touch mode should always be set before the focusable flag - // otherwise, setting the focusable flag will trigger a focusableViewAvailable() - // which, in touch mode, will not successfully request focus on this view - // because the focusable in touch mode flag is not set - setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE); - if (focusableInTouchMode) { - setFlags(FOCUSABLE, FOCUSABLE_MASK); - } - } - /** - * Set whether this view should have sound effects enabled for events such as - * clicking and touching. - * - *

You may wish to disable sound effects for a view if you already play sounds, - * for instance, a dial key that plays dtmf tones. - * - * @param soundEffectsEnabled whether sound effects are enabled for this view. - * @see #isSoundEffectsEnabled() - * @see #playSoundEffect(int) - * @attr ref android.R.styleable#View_soundEffectsEnabled - */ - public void setSoundEffectsEnabled(boolean soundEffectsEnabled) { - setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED); - } - /** - * @return whether this view should have sound effects enabled for events such as - * clicking and touching. - * - * @see #setSoundEffectsEnabled(boolean) - * @see #playSoundEffect(int) - * @attr ref android.R.styleable#View_soundEffectsEnabled - */ - @ViewDebug.ExportedProperty - public boolean isSoundEffectsEnabled() { - return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED); - } - /** - * Set whether this view should have haptic feedback for events such as - * long presses. - * - *

You may wish to disable haptic feedback if your view already controls - * its own haptic feedback. - * - * @param hapticFeedbackEnabled whether haptic feedback enabled for this view. - * @see #isHapticFeedbackEnabled() - * @see #performHapticFeedback(int) - * @attr ref android.R.styleable#View_hapticFeedbackEnabled - */ - public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) { - setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED); - } - /** - * @return whether this view should have haptic feedback enabled for events - * long presses. - * - * @see #setHapticFeedbackEnabled(boolean) - * @see #performHapticFeedback(int) - * @attr ref android.R.styleable#View_hapticFeedbackEnabled - */ - @ViewDebug.ExportedProperty - public boolean isHapticFeedbackEnabled() { - return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED); - } - /** - * Returns the layout direction for this view. - * - * @return One of {@link #LAYOUT_DIRECTION_LTR}, - * {@link #LAYOUT_DIRECTION_RTL}, - * {@link #LAYOUT_DIRECTION_INHERIT} or - * {@link #LAYOUT_DIRECTION_LOCALE}. - * @attr ref android.R.styleable#View_layoutDirection - * - * @hide - */ - @ViewDebug.ExportedProperty(category = "layout", mapping = { - @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "LTR"), - @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RTL"), - @ViewDebug.IntToString(from = LAYOUT_DIRECTION_INHERIT, to = "INHERIT"), - @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LOCALE, to = "LOCALE") - }) - public int getLayoutDirection() { - return mViewFlags & LAYOUT_DIRECTION_MASK; - } - /** - * Set the layout direction for this view. This will propagate a reset of layout direction - * resolution to the view's children and resolve layout direction for this view. - * - * @param layoutDirection One of {@link #LAYOUT_DIRECTION_LTR}, - * {@link #LAYOUT_DIRECTION_RTL}, - * {@link #LAYOUT_DIRECTION_INHERIT} or - * {@link #LAYOUT_DIRECTION_LOCALE}. - * - * @attr ref android.R.styleable#View_layoutDirection - * - * @hide - */ - @RemotableViewMethod - public void setLayoutDirection(int layoutDirection) { - if (getLayoutDirection() != layoutDirection) { - resetResolvedLayoutDirection(); - // Setting the flag will also request a layout. - setFlags(layoutDirection, LAYOUT_DIRECTION_MASK); - } - } - /** - * Returns the resolved layout direction for this view. - * - * @return {@link #LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns - * {@link #LAYOUT_DIRECTION_LTR} id the layout direction is not RTL. - * - * @hide - */ - @ViewDebug.ExportedProperty(category = "layout", mapping = { - @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "RESOLVED_DIRECTION_LTR"), - @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RESOLVED_DIRECTION_RTL") - }) - public int getResolvedLayoutDirection() { - resolveLayoutDirectionIfNeeded(); - return ((mPrivateFlags2 & LAYOUT_DIRECTION_RESOLVED_RTL) == LAYOUT_DIRECTION_RESOLVED_RTL) ? - LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR; - } - /** - *

Indicates whether or not this view's layout is right-to-left. This is resolved from - * layout attribute and/or the inherited value from the parent.

- * - * @return true if the layout is right-to-left. - * - * @hide - */ - @ViewDebug.ExportedProperty(category = "layout") - public boolean isLayoutRtl() { - return (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL); - } - /** - * If this view doesn't do any drawing on its own, set this flag to - * allow further optimizations. By default, this flag is not set on - * View, but could be set on some View subclasses such as ViewGroup. - * - * Typically, if you override {@link #onDraw(android.graphics.Canvas)} - * you should clear this flag. - * - * @param willNotDraw whether or not this View draw on its own - */ - public void setWillNotDraw(boolean willNotDraw) { - setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK); - } - /** - * Returns whether or not this View draws on its own. - * - * @return true if this view has nothing to draw, false otherwise - */ - @ViewDebug.ExportedProperty(category = "drawing") - public boolean willNotDraw() { - return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW; - } - /** - * When a View's drawing cache is enabled, drawing is redirected to an - * offscreen bitmap. Some views, like an ImageView, must be able to - * bypass this mechanism if they already draw a single bitmap, to avoid - * unnecessary usage of the memory. - * - * @param willNotCacheDrawing true if this view does not cache its - * drawing, false otherwise - */ - public void setWillNotCacheDrawing(boolean willNotCacheDrawing) { - setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING); - } - /** - * Returns whether or not this View can cache its drawing or not. - * - * @return true if this view does not cache its drawing, false otherwise - */ - @ViewDebug.ExportedProperty(category = "drawing") - public boolean willNotCacheDrawing() { - return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING; - } - /** - * Indicates whether this view reacts to click events or not. - * - * @return true if the view is clickable, false otherwise - * - * @see #setClickable(boolean) - * @attr ref android.R.styleable#View_clickable - */ - @ViewDebug.ExportedProperty - public boolean isClickable() { - return (mViewFlags & CLICKABLE) == CLICKABLE; - } - /** - * Enables or disables click events for this view. When a view - * is clickable it will change its state to "pressed" on every click. - * Subclasses should set the view clickable to visually react to - * user's clicks. - * - * @param clickable true to make the view clickable, false otherwise - * - * @see #isClickable() - * @attr ref android.R.styleable#View_clickable - */ - public void setClickable(boolean clickable) { - setFlags(clickable ? CLICKABLE : 0, CLICKABLE); - } - /** - * Indicates whether this view reacts to long click events or not. - * - * @return true if the view is long clickable, false otherwise - * - * @see #setLongClickable(boolean) - * @attr ref android.R.styleable#View_longClickable - */ - public boolean isLongClickable() { - return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; - } - /** - * Enables or disables long click events for this view. When a view is long - * clickable it reacts to the user holding down the button for a longer - * duration than a tap. This event can either launch the listener or a - * context menu. - * - * @param longClickable true to make the view long clickable, false otherwise - * @see #isLongClickable() - * @attr ref android.R.styleable#View_longClickable - */ - public void setLongClickable(boolean longClickable) { - setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE); - } - /** - * Sets the pressed state for this view. - * - * @see #isClickable() - * @see #setClickable(boolean) - * - * @param pressed Pass true to set the View's internal state to "pressed", or false to reverts - * the View's internal state from a previously set "pressed" state. - */ - public void setPressed(boolean pressed) { - if (pressed) { - mPrivateFlags |= PRESSED; - } else { - mPrivateFlags &= ~PRESSED; - } - refreshDrawableState(); - dispatchSetPressed(pressed); - } - /** - * Dispatch setPressed to all of this View's children. - * - * @see #setPressed(boolean) - * - * @param pressed The new pressed state - */ - protected void dispatchSetPressed(boolean pressed) { - } - /** - * Indicates whether the view is currently in pressed state. Unless - * {@link #setPressed(boolean)} is explicitly called, only clickable views can enter - * the pressed state. - * - * @see #setPressed(boolean) - * @see #isClickable() - * @see #setClickable(boolean) - * - * @return true if the view is currently pressed, false otherwise - */ - public boolean isPressed() { - return (mPrivateFlags & PRESSED) == PRESSED; - } - /** - * Indicates whether this view will save its state (that is, - * whether its {@link #onSaveInstanceState} method will be called). - * - * @return Returns true if the view state saving is enabled, else false. - * - * @see #setSaveEnabled(boolean) - * @attr ref android.R.styleable#View_saveEnabled - */ - public boolean isSaveEnabled() { - return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED; - } - /** - * Controls whether the saving of this view's state is - * enabled (that is, whether its {@link #onSaveInstanceState} method - * will be called). Note that even if freezing is enabled, the - * view still must have an id assigned to it (via {@link #setId(int)}) - * for its state to be saved. This flag can only disable the - * saving of this view; any child views may still have their state saved. - * - * @param enabled Set to false to disable state saving, or true - * (the default) to allow it. - * - * @see #isSaveEnabled() - * @see #setId(int) - * @see #onSaveInstanceState() - * @attr ref android.R.styleable#View_saveEnabled - */ - public void setSaveEnabled(boolean enabled) { - setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK); - } - /** - * Gets whether the framework should discard touches when the view's - * window is obscured by another visible window. - * Refer to the {@link View} security documentation for more details. - * - * @return True if touch filtering is enabled. - * - * @see #setFilterTouchesWhenObscured(boolean) - * @attr ref android.R.styleable#View_filterTouchesWhenObscured - */ - @ViewDebug.ExportedProperty - public boolean getFilterTouchesWhenObscured() { - return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0; - } - /** - * Sets whether the framework should discard touches when the view's - * window is obscured by another visible window. - * Refer to the {@link View} security documentation for more details. - * - * @param enabled True if touch filtering should be enabled. - * - * @see #getFilterTouchesWhenObscured - * @attr ref android.R.styleable#View_filterTouchesWhenObscured - */ - public void setFilterTouchesWhenObscured(boolean enabled) { - setFlags(enabled ? 0 : FILTER_TOUCHES_WHEN_OBSCURED, - FILTER_TOUCHES_WHEN_OBSCURED); - } - /** - * Indicates whether the entire hierarchy under this view will save its - * state when a state saving traversal occurs from its parent. The default - * is true; if false, these views will not be saved unless - * {@link #saveHierarchyState(SparseArray)} is called directly on this view. - * - * @return Returns true if the view state saving from parent is enabled, else false. - * - * @see #setSaveFromParentEnabled(boolean) - */ - public boolean isSaveFromParentEnabled() { - return (mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED; - } - /** - * Controls whether the entire hierarchy under this view will save its - * state when a state saving traversal occurs from its parent. The default - * is true; if false, these views will not be saved unless - * {@link #saveHierarchyState(SparseArray)} is called directly on this view. - * - * @param enabled Set to false to disable state saving, or true - * (the default) to allow it. - * - * @see #isSaveFromParentEnabled() - * @see #setId(int) - * @see #onSaveInstanceState() - */ - public void setSaveFromParentEnabled(boolean enabled) { - setFlags(enabled ? 0 : PARENT_SAVE_DISABLED, PARENT_SAVE_DISABLED_MASK); - } - /** - * Returns whether this View is able to take focus. - * - * @return True if this view can take focus, or false otherwise. - * @attr ref android.R.styleable#View_focusable - */ - @ViewDebug.ExportedProperty(category = "focus") - public final boolean isFocusable() { - return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK); - } - /** - * When a view is focusable, it may not want to take focus when in touch mode. - * For example, a button would like focus when the user is navigating via a D-pad - * so that the user can click on it, but once the user starts touching the screen, - * the button shouldn't take focus - * @return Whether the view is focusable in touch mode. - * @attr ref android.R.styleable#View_focusableInTouchMode - */ - @ViewDebug.ExportedProperty - public final boolean isFocusableInTouchMode() { - return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE); - } - /** - * Find the nearest view in the specified direction that can take focus. - * This does not actually give focus to that view. - * - * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT - * - * @return The nearest focusable in the specified direction, or null if none - * can be found. - */ - public View focusSearch(int direction) { - if (mParent != null) { - return mParent.focusSearch(this, direction); - } else { - return null; - } - } - /** - * This method is the last chance for the focused view and its ancestors to - * respond to an arrow key. This is called when the focused view did not - * consume the key internally, nor could the view system find a new view in - * the requested direction to give focus to. - * - * @param focused The currently focused view. - * @param direction The direction focus wants to move. One of FOCUS_UP, - * FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. - * @return True if the this view consumed this unhandled move. - */ - public boolean dispatchUnhandledMove(View focused, int direction) { - return false; - } - /** - * If a user manually specified the next view id for a particular direction, - * use the root to look up the view. - * @param root The root view of the hierarchy containing this view. - * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, - * or FOCUS_BACKWARD. - * @return The user specified next view, or null if there is none. - */ - View findUserSetNextFocus(View root, int direction) { - switch (direction) { - case FOCUS_LEFT: - if (mNextFocusLeftId == View.NO_ID) return null; - return findViewInsideOutShouldExist(root, mNextFocusLeftId); - case FOCUS_RIGHT: - if (mNextFocusRightId == View.NO_ID) return null; - return findViewInsideOutShouldExist(root, mNextFocusRightId); - case FOCUS_UP: - if (mNextFocusUpId == View.NO_ID) return null; - return findViewInsideOutShouldExist(root, mNextFocusUpId); - case FOCUS_DOWN: - if (mNextFocusDownId == View.NO_ID) return null; - return findViewInsideOutShouldExist(root, mNextFocusDownId); - case FOCUS_FORWARD: - if (mNextFocusForwardId == View.NO_ID) return null; - return findViewInsideOutShouldExist(root, mNextFocusForwardId); - case FOCUS_BACKWARD: { - final int id = mID; - return root.findViewByPredicateInsideOut(this, new Predicate() { - @Override - public boolean apply(View t) { - return t.mNextFocusForwardId == id; - } - }); - } - } - return null; - } - private View findViewInsideOutShouldExist(View root, final int childViewId) { - View result = root.findViewByPredicateInsideOut(this, new Predicate() { - @Override - public boolean apply(View t) { - return t.mID == childViewId; - } - }); - if (result == null) { - Log.w(VIEW_LOG_TAG, "couldn't find next focus view specified " - + "by user for id " + childViewId); - } - return result; - } - /** - * Find and return all focusable views that are descendants of this view, - * possibly including this view if it is focusable itself. - * - * @param direction The direction of the focus - * @return A list of focusable views - */ - public ArrayList getFocusables(int direction) { - ArrayList result = new ArrayList(24); - addFocusables(result, direction); - return result; - } - /** - * Add any focusable views that are descendants of this view (possibly - * including this view if it is focusable itself) to views. If we are in touch mode, - * only add views that are also focusable in touch mode. - * - * @param views Focusable views found so far - * @param direction The direction of the focus - */ - public void addFocusables(ArrayList views, int direction) { - addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); - } - /** - * Adds any focusable views that are descendants of this view (possibly - * including this view if it is focusable itself) to views. This method - * adds all focusable views regardless if we are in touch mode or - * only views focusable in touch mode if we are in touch mode depending on - * the focusable mode paramater. - * - * @param views Focusable views found so far or null if all we are interested is - * the number of focusables. - * @param direction The direction of the focus. - * @param focusableMode The type of focusables to be added. - * - * @see #FOCUSABLES_ALL - * @see #FOCUSABLES_TOUCH_MODE - */ - public void addFocusables(ArrayList views, int direction, int focusableMode) { - if (!isFocusable()) { - return; - } - if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE && - isInTouchMode() && !isFocusableInTouchMode()) { - return; - } - if (views != null) { - views.add(this); - } - } - /** - * Finds the Views that contain given text. The containment is case insensitive. - * The search is performed by either the text that the View renders or the content - * description that describes the view for accessibility purposes and the view does - * not render or both. Clients can specify how the search is to be performed via - * passing the {@link #FIND_VIEWS_WITH_TEXT} and - * {@link #FIND_VIEWS_WITH_CONTENT_DESCRIPTION} flags. - * - * @param outViews The output list of matching Views. - * @param searched The text to match against. - * - * @see #FIND_VIEWS_WITH_TEXT - * @see #FIND_VIEWS_WITH_CONTENT_DESCRIPTION - * @see #setContentDescription(CharSequence) - */ - public void findViewsWithText(ArrayList outViews, CharSequence searched, int flags) { - if (getAccessibilityNodeProvider() != null) { - if ((flags & FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS) != 0) { - outViews.add(this); - } - } else if ((flags & FIND_VIEWS_WITH_CONTENT_DESCRIPTION) != 0 - && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mContentDescription)) { - String searchedLowerCase = searched.toString().toLowerCase(); - String contentDescriptionLowerCase = mContentDescription.toString().toLowerCase(); - if (contentDescriptionLowerCase.contains(searchedLowerCase)) { - outViews.add(this); - } - } - } - /** - * Find and return all touchable views that are descendants of this view, - * possibly including this view if it is touchable itself. - * - * @return A list of touchable views - */ - public ArrayList getTouchables() { - ArrayList result = new ArrayList(); - addTouchables(result); - return result; - } - /** - * Add any touchable views that are descendants of this view (possibly - * including this view if it is touchable itself) to views. - * - * @param views Touchable views found so far - */ - public void addTouchables(ArrayList views) { - final int viewFlags = mViewFlags; - if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) - && (viewFlags & ENABLED_MASK) == ENABLED) { - views.add(this); - } - } - /** - * Call this to try to give focus to a specific view or to one of its - * descendants. - * - * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns - * false), or if it is focusable and it is not focusable in touch mode - * ({@link #isFocusableInTouchMode}) while the device is in touch mode. - * - * See also {@link #focusSearch(int)}, which is what you call to say that you - * have focus, and you want your parent to look for the next one. - * - * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments - * {@link #FOCUS_DOWN} and null. - * - * @return Whether this view or one of its descendants actually took focus. - */ - public final boolean requestFocus() { - return requestFocus(View.FOCUS_DOWN); - } - /** - * Call this to try to give focus to a specific view or to one of its - * descendants and give it a hint about what direction focus is heading. - * - * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns - * false), or if it is focusable and it is not focusable in touch mode - * ({@link #isFocusableInTouchMode}) while the device is in touch mode. - * - * See also {@link #focusSearch(int)}, which is what you call to say that you - * have focus, and you want your parent to look for the next one. - * - * This is equivalent to calling {@link #requestFocus(int, Rect)} with - * null set for the previously focused rectangle. - * - * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT - * @return Whether this view or one of its descendants actually took focus. - */ - public final boolean requestFocus(int direction) { - return requestFocus(direction, null); - } - /** - * Call this to try to give focus to a specific view or to one of its descendants - * and give it hints about the direction and a specific rectangle that the focus - * is coming from. The rectangle can help give larger views a finer grained hint - * about where focus is coming from, and therefore, where to show selection, or - * forward focus change internally. - * - * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns - * false), or if it is focusable and it is not focusable in touch mode - * ({@link #isFocusableInTouchMode}) while the device is in touch mode. - * - * A View will not take focus if it is not visible. - * - * A View will not take focus if one of its parents has - * {@link android.view.ViewGroup#getDescendantFocusability()} equal to - * {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}. - * - * See also {@link #focusSearch(int)}, which is what you call to say that you - * have focus, and you want your parent to look for the next one. - * - * You may wish to override this method if your custom {@link View} has an internal - * {@link View} that it wishes to forward the request to. - * - * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT - * @param previouslyFocusedRect The rectangle (in this View's coordinate system) - * to give a finer grained hint about where focus is coming from. May be null - * if there is no hint. - * @return Whether this view or one of its descendants actually took focus. - */ - public boolean requestFocus(int direction, Rect previouslyFocusedRect) { - // need to be focusable - if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE || - (mViewFlags & VISIBILITY_MASK) != VISIBLE) { - return false; - } - // need to be focusable in touch mode if in touch mode - if (isInTouchMode() && - (FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) { - return false; - } - // need to not have any parents blocking us - if (hasAncestorThatBlocksDescendantFocus()) { - return false; - } - handleFocusGainInternal(direction, previouslyFocusedRect); - return true; - } - /** - * Call this to try to give focus to a specific view or to one of its descendants. This is a - * special variant of {@link #requestFocus() } that will allow views that are not focuable in - * touch mode to request focus when they are touched. - * - * @return Whether this view or one of its descendants actually took focus. - * - * @see #isInTouchMode() - * - */ - public final boolean requestFocusFromTouch() { - // Leave touch mode if we need to - if (isInTouchMode()) { - ViewRootImpl viewRoot = getViewRootImpl(); - if (viewRoot != null) { - viewRoot.ensureTouchMode(false); - } - } - return requestFocus(View.FOCUS_DOWN); - } - /** - * @return Whether any ancestor of this view blocks descendant focus. - */ - private boolean hasAncestorThatBlocksDescendantFocus() { - ViewParent ancestor = mParent; - while (ancestor instanceof ViewGroup) { - final ViewGroup vgAncestor = (ViewGroup) ancestor; - if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS) { - return true; - } else { - ancestor = vgAncestor.getParent(); - } - } - return false; - } - /** - * @hide - */ - public void dispatchStartTemporaryDetach() { - onStartTemporaryDetach(); - } - /** - * This is called when a container is going to temporarily detach a child, with - * {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}. - * It will either be followed by {@link #onFinishTemporaryDetach()} or - * {@link #onDetachedFromWindow()} when the container is done. - */ - public void onStartTemporaryDetach() { - removeUnsetPressCallback(); - mPrivateFlags |= CANCEL_NEXT_UP_EVENT; - } - /** - * @hide - */ - public void dispatchFinishTemporaryDetach() { - onFinishTemporaryDetach(); - } - /** - * Called after {@link #onStartTemporaryDetach} when the container is done - * changing the view. - */ - public void onFinishTemporaryDetach() { - } - /** - * Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState} - * for this view's window. Returns null if the view is not currently attached - * to the window. Normally you will not need to use this directly, but - * just use the standard high-level event callbacks like - * {@link #onKeyDown(int, KeyEvent)}. - */ - public KeyEvent.DispatcherState getKeyDispatcherState() { - return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null; - } - /** - * Dispatch a key event before it is processed by any input method - * associated with the view hierarchy. This can be used to intercept - * key events in special situations before the IME consumes them; a - * typical example would be handling the BACK key to update the application's - * UI instead of allowing the IME to see it and close itself. - * - * @param event The key event to be dispatched. - * @return True if the event was handled, false otherwise. - */ - public boolean dispatchKeyEventPreIme(KeyEvent event) { - return onKeyPreIme(event.getKeyCode(), event); - } - /** - * Dispatch a key event to the next view on the focus path. This path runs - * from the top of the view tree down to the currently focused view. If this - * view has focus, it will dispatch to itself. Otherwise it will dispatch - * the next node down the focus path. This method also fires any key - * listeners. - * - * @param event The key event to be dispatched. - * @return True if the event was handled, false otherwise. - */ - public boolean dispatchKeyEvent(KeyEvent event) { - if (mInputEventConsistencyVerifier != null) { - mInputEventConsistencyVerifier.onKeyEvent(event, 0); - } - // Give any attached key listener a first crack at the event. - //noinspection SimplifiableIfStatement - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED - && li.mOnKeyListener.onKey(this, event.getKeyCode(), event)) { - return true; - } - if (event.dispatch(this, mAttachInfo != null - ? mAttachInfo.mKeyDispatchState : null, this)) { - return true; - } - if (mInputEventConsistencyVerifier != null) { - mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); - } - return false; - } - /** - * Dispatches a key shortcut event. - * - * @param event The key event to be dispatched. - * @return True if the event was handled by the view, false otherwise. - */ - public boolean dispatchKeyShortcutEvent(KeyEvent event) { - return onKeyShortcut(event.getKeyCode(), event); - } - /** - * Pass the touch screen motion event down to the target view, or this - * view if it is the target. - * - * @param event The motion event to be dispatched. - * @return True if the event was handled by the view, false otherwise. - */ - public boolean dispatchTouchEvent(MotionEvent event) { - if (mInputEventConsistencyVerifier != null) { - mInputEventConsistencyVerifier.onTouchEvent(event, 0); - } - if (onFilterTouchEventForSecurity(event)) { - //noinspection SimplifiableIfStatement - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnTouchListener != null && (mViewFlags & ENABLED_MASK) == ENABLED - && li.mOnTouchListener.onTouch(this, event)) { - return true; - } - if (onTouchEvent(event)) { - return true; - } - } - if (mInputEventConsistencyVerifier != null) { - mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); - } - return false; - } - /** - * Filter the touch event to apply security policies. - * - * @param event The motion event to be filtered. - * @return True if the event should be dispatched, false if the event should be dropped. - * - * @see #getFilterTouchesWhenObscured - */ - public boolean onFilterTouchEventForSecurity(MotionEvent event) { - //noinspection RedundantIfStatement - if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0 - && (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) { - // Window is obscured, drop this touch. - return false; - } - return true; - } - /** - * Pass a trackball motion event down to the focused view. - * - * @param event The motion event to be dispatched. - * @return True if the event was handled by the view, false otherwise. - */ - public boolean dispatchTrackballEvent(MotionEvent event) { - if (mInputEventConsistencyVerifier != null) { - mInputEventConsistencyVerifier.onTrackballEvent(event, 0); - } - return onTrackballEvent(event); - } - /** - * Dispatch a generic motion event. - *

- * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} - * are delivered to the view under the pointer. All other generic motion events are - * delivered to the focused view. Hover events are handled specially and are delivered - * to {@link #onHoverEvent(MotionEvent)}. - *

- * - * @param event The motion event to be dispatched. - * @return True if the event was handled by the view, false otherwise. - */ - public boolean dispatchGenericMotionEvent(MotionEvent event) { - if (mInputEventConsistencyVerifier != null) { - mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0); - } - final int source = event.getSource(); - if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { - final int action = event.getAction(); - if (action == MotionEvent.ACTION_HOVER_ENTER - || action == MotionEvent.ACTION_HOVER_MOVE - || action == MotionEvent.ACTION_HOVER_EXIT) { - if (dispatchHoverEvent(event)) { - return true; - } - } else if (dispatchGenericPointerEvent(event)) { - return true; - } - } else if (dispatchGenericFocusedEvent(event)) { - return true; - } - if (dispatchGenericMotionEventInternal(event)) { - return true; - } - if (mInputEventConsistencyVerifier != null) { - mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); - } - return false; - } - private boolean dispatchGenericMotionEventInternal(MotionEvent event) { - //noinspection SimplifiableIfStatement - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnGenericMotionListener != null - && (mViewFlags & ENABLED_MASK) == ENABLED - && li.mOnGenericMotionListener.onGenericMotion(this, event)) { - return true; - } - if (onGenericMotionEvent(event)) { - return true; - } - if (mInputEventConsistencyVerifier != null) { - mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); - } - return false; - } - /** - * Dispatch a hover event. - *

- * Do not call this method directly. - * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. - *

- * - * @param event The motion event to be dispatched. - * @return True if the event was handled by the view, false otherwise. - */ - protected boolean dispatchHoverEvent(MotionEvent event) { - //noinspection SimplifiableIfStatement - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnHoverListener != null - && (mViewFlags & ENABLED_MASK) == ENABLED - && li.mOnHoverListener.onHover(this, event)) { - return true; - } - return onHoverEvent(event); - } - /** - * Returns true if the view has a child to which it has recently sent - * {@link MotionEvent#ACTION_HOVER_ENTER}. If this view is hovered and - * it does not have a hovered child, then it must be the innermost hovered view. - * @hide - */ - protected boolean hasHoveredChild() { - return false; - } - /** - * Dispatch a generic motion event to the view under the first pointer. - *

- * Do not call this method directly. - * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. - *

- * - * @param event The motion event to be dispatched. - * @return True if the event was handled by the view, false otherwise. - */ - protected boolean dispatchGenericPointerEvent(MotionEvent event) { - return false; - } - /** - * Dispatch a generic motion event to the currently focused view. - *

- * Do not call this method directly. - * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. - *

- * - * @param event The motion event to be dispatched. - * @return True if the event was handled by the view, false otherwise. - */ - protected boolean dispatchGenericFocusedEvent(MotionEvent event) { - return false; - } - /** - * Dispatch a pointer event. - *

- * Dispatches touch related pointer events to {@link #onTouchEvent(MotionEvent)} and all - * other events to {@link #onGenericMotionEvent(MotionEvent)}. This separation of concerns - * reinforces the invariant that {@link #onTouchEvent(MotionEvent)} is really about touches - * and should not be expected to handle other pointing device features. - *

- * - * @param event The motion event to be dispatched. - * @return True if the event was handled by the view, false otherwise. - * @hide - */ - public final boolean dispatchPointerEvent(MotionEvent event) { - if (event.isTouchEvent()) { - return dispatchTouchEvent(event); - } else { - return dispatchGenericMotionEvent(event); - } - } - /** - * Called when the window containing this view gains or loses window focus. - * ViewGroups should override to route to their children. - * - * @param hasFocus True if the window containing this view now has focus, - * false otherwise. - */ - public void dispatchWindowFocusChanged(boolean hasFocus) { - onWindowFocusChanged(hasFocus); - } - /** - * Called when the window containing this view gains or loses focus. Note - * that this is separate from view focus: to receive key events, both - * your view and its window must have focus. If a window is displayed - * on top of yours that takes input focus, then your own window will lose - * focus but the view focus will remain unchanged. - * - * @param hasWindowFocus True if the window containing this view now has - * focus, false otherwise. - */ - public void onWindowFocusChanged(boolean hasWindowFocus) { - InputMethodManager imm = InputMethodManager.peekInstance(); - if (!hasWindowFocus) { - if (isPressed()) { - setPressed(false); - } - if (imm != null && (mPrivateFlags & FOCUSED) != 0) { - imm.focusOut(this); - } - removeLongPressCallback(); - removeTapCallback(); - onFocusLost(); - } else if (imm != null && (mPrivateFlags & FOCUSED) != 0) { - imm.focusIn(this); - } - refreshDrawableState(); - } - /** - * Returns true if this view is in a window that currently has window focus. - * Note that this is not the same as the view itself having focus. - * - * @return True if this view is in a window that currently has window focus. - */ - public boolean hasWindowFocus() { - return mAttachInfo != null && mAttachInfo.mHasWindowFocus; - } - /** - * Dispatch a view visibility change down the view hierarchy. - * ViewGroups should override to route to their children. - * @param changedView The view whose visibility changed. Could be 'this' or - * an ancestor view. - * @param visibility The new visibility of changedView: {@link #VISIBLE}, - * {@link #INVISIBLE} or {@link #GONE}. - */ - protected void dispatchVisibilityChanged(View changedView, int visibility) { - onVisibilityChanged(changedView, visibility); - } - /** - * Called when the visibility of the view or an ancestor of the view is changed. - * @param changedView The view whose visibility changed. Could be 'this' or - * an ancestor view. - * @param visibility The new visibility of changedView: {@link #VISIBLE}, - * {@link #INVISIBLE} or {@link #GONE}. - */ - protected void onVisibilityChanged(View changedView, int visibility) { - if (visibility == VISIBLE) { - if (mAttachInfo != null) { - initialAwakenScrollBars(); - } else { - mPrivateFlags |= AWAKEN_SCROLL_BARS_ON_ATTACH; - } - } - } - /** - * Dispatch a hint about whether this view is displayed. For instance, when - * a View moves out of the screen, it might receives a display hint indicating - * the view is not displayed. Applications should not rely on this hint - * as there is no guarantee that they will receive one. - * - * @param hint A hint about whether or not this view is displayed: - * {@link #VISIBLE} or {@link #INVISIBLE}. - */ - public void dispatchDisplayHint(int hint) { - onDisplayHint(hint); - } - /** - * Gives this view a hint about whether is displayed or not. For instance, when - * a View moves out of the screen, it might receives a display hint indicating - * the view is not displayed. Applications should not rely on this hint - * as there is no guarantee that they will receive one. - * - * @param hint A hint about whether or not this view is displayed: - * {@link #VISIBLE} or {@link #INVISIBLE}. - */ - protected void onDisplayHint(int hint) { - } - /** - * Dispatch a window visibility change down the view hierarchy. - * ViewGroups should override to route to their children. - * - * @param visibility The new visibility of the window. - * - * @see #onWindowVisibilityChanged(int) - */ - public void dispatchWindowVisibilityChanged(int visibility) { - onWindowVisibilityChanged(visibility); - } - /** - * Called when the window containing has change its visibility - * (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note - * that this tells you whether or not your window is being made visible - * to the window manager; this does not tell you whether or not - * your window is obscured by other windows on the screen, even if it - * is itself visible. - * - * @param visibility The new visibility of the window. - */ - protected void onWindowVisibilityChanged(int visibility) { - if (visibility == VISIBLE) { - initialAwakenScrollBars(); - } - } - /** - * Returns the current visibility of the window this view is attached to - * (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}). - * - * @return Returns the current visibility of the view's window. - */ - public int getWindowVisibility() { - return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE; - } - /** - * Retrieve the overall visible display size in which the window this view is - * attached to has been positioned in. This takes into account screen - * decorations above the window, for both cases where the window itself - * is being position inside of them or the window is being placed under - * then and covered insets are used for the window to position its content - * inside. In effect, this tells you the available area where content can - * be placed and remain visible to users. - * - *

This function requires an IPC back to the window manager to retrieve - * the requested information, so should not be used in performance critical - * code like drawing. - * - * @param outRect Filled in with the visible display frame. If the view - * is not attached to a window, this is simply the raw display size. - */ - public void getWindowVisibleDisplayFrame(Rect outRect) { - if (mAttachInfo != null) { - try { - mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect); - } catch (RemoteException e) { - return; - } - // XXX This is really broken, and probably all needs to be done - // in the window manager, and we need to know more about whether - // we want the area behind or in front of the IME. - final Rect insets = mAttachInfo.mVisibleInsets; - outRect.left += insets.left; - outRect.top += insets.top; - outRect.right -= insets.right; - outRect.bottom -= insets.bottom; - return; - } - Display d = WindowManagerImpl.getDefault().getDefaultDisplay(); - d.getRectSize(outRect); - } - /** - * Dispatch a notification about a resource configuration change down - * the view hierarchy. - * ViewGroups should override to route to their children. - * - * @param newConfig The new resource configuration. - * - * @see #onConfigurationChanged(android.content.res.Configuration) - */ - public void dispatchConfigurationChanged(Configuration newConfig) { - onConfigurationChanged(newConfig); - } - /** - * Called when the current configuration of the resources being used - * by the application have changed. You can use this to decide when - * to reload resources that can changed based on orientation and other - * configuration characterstics. You only need to use this if you are - * not relying on the normal {@link android.app.Activity} mechanism of - * recreating the activity instance upon a configuration change. - * - * @param newConfig The new resource configuration. - */ - protected void onConfigurationChanged(Configuration newConfig) { - } - /** - * Private function to aggregate all per-view attributes in to the view - * root. - */ - void dispatchCollectViewAttributes(int visibility) { - performCollectViewAttributes(visibility); - } - void performCollectViewAttributes(int visibility) { - if ((visibility & VISIBILITY_MASK) == VISIBLE && mAttachInfo != null) { - if ((mViewFlags & KEEP_SCREEN_ON) == KEEP_SCREEN_ON) { - mAttachInfo.mKeepScreenOn = true; - } - mAttachInfo.mSystemUiVisibility |= mSystemUiVisibility; - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { - mAttachInfo.mHasSystemUiListeners = true; - } - } - } - void needGlobalAttributesUpdate(boolean force) { - final AttachInfo ai = mAttachInfo; - if (ai != null) { - if (force || ai.mKeepScreenOn || (ai.mSystemUiVisibility != 0) - || ai.mHasSystemUiListeners) { - ai.mRecomputeGlobalAttributes = true; - } - } - } - /** - * Returns whether the device is currently in touch mode. Touch mode is entered - * once the user begins interacting with the device by touch, and affects various - * things like whether focus is always visible to the user. - * - * @return Whether the device is in touch mode. - */ - @ViewDebug.ExportedProperty - public boolean isInTouchMode() { - if (mAttachInfo != null) { - return mAttachInfo.mInTouchMode; - } else { - return ViewRootImpl.isInTouchMode(); - } - } - /** - * Returns the context the view is running in, through which it can - * access the current theme, resources, etc. - * - * @return The view's Context. - */ - @ViewDebug.CapturedViewProperty - public final Context getContext() { - return mContext; - } - /** - * Handle a key event before it is processed by any input method - * associated with the view hierarchy. This can be used to intercept - * key events in special situations before the IME consumes them; a - * typical example would be handling the BACK key to update the application's - * UI instead of allowing the IME to see it and close itself. - * - * @param keyCode The value in event.getKeyCode(). - * @param event Description of the key event. - * @return If you handled the event, return true. If you want to allow the - * event to be handled by the next receiver, return false. - */ - public boolean onKeyPreIme(int keyCode, KeyEvent event) { - return false; - } - /** - * Default implementation of {@link KeyEvent.Callback#onKeyDown(int, KeyEvent) - * KeyEvent.Callback.onKeyDown()}: perform press of the view - * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER} - * is released, if the view is enabled and clickable. - * - * @param keyCode A key code that represents the button pressed, from - * {@link android.view.KeyEvent}. - * @param event The KeyEvent object that defines the button action. - */ - public boolean onKeyDown(int keyCode, KeyEvent event) { - boolean result = false; - switch (keyCode) { - case KeyEvent.KEYCODE_DPAD_CENTER: - case KeyEvent.KEYCODE_ENTER: { - if ((mViewFlags & ENABLED_MASK) == DISABLED) { - return true; - } - // Long clickable items don't necessarily have to be clickable - if (((mViewFlags & CLICKABLE) == CLICKABLE || - (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) && - (event.getRepeatCount() == 0)) { - setPressed(true); - checkForLongClick(0); - return true; - } - break; - } - } - return result; - } - /** - * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) - * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle - * the event). - */ - public boolean onKeyLongPress(int keyCode, KeyEvent event) { - return false; - } - /** - * Default implementation of {@link KeyEvent.Callback#onKeyUp(int, KeyEvent) - * KeyEvent.Callback.onKeyUp()}: perform clicking of the view - * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or - * {@link KeyEvent#KEYCODE_ENTER} is released. - * - * @param keyCode A key code that represents the button pressed, from - * {@link android.view.KeyEvent}. - * @param event The KeyEvent object that defines the button action. - */ - public boolean onKeyUp(int keyCode, KeyEvent event) { - boolean result = false; - switch (keyCode) { - case KeyEvent.KEYCODE_DPAD_CENTER: - case KeyEvent.KEYCODE_ENTER: { - if ((mViewFlags & ENABLED_MASK) == DISABLED) { - return true; - } - if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) { - setPressed(false); - if (!mHasPerformedLongPress) { - // This is a tap, so remove the longpress check - removeLongPressCallback(); - result = performClick(); - } - } - break; - } - } - return result; - } - /** - * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) - * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle - * the event). - * - * @param keyCode A key code that represents the button pressed, from - * {@link android.view.KeyEvent}. - * @param repeatCount The number of times the action was made. - * @param event The KeyEvent object that defines the button action. - */ - public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { - return false; - } - /** - * Called on the focused view when a key shortcut event is not handled. - * Override this method to implement local key shortcuts for the View. - * Key shortcuts can also be implemented by setting the - * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. - * - * @param keyCode The value in event.getKeyCode(). - * @param event Description of the key event. - * @return If you handled the event, return true. If you want to allow the - * event to be handled by the next receiver, return false. - */ - public boolean onKeyShortcut(int keyCode, KeyEvent event) { - return false; - } - /** - * Check whether the called view is a text editor, in which case it - * would make sense to automatically display a soft input window for - * it. Subclasses should override this if they implement - * {@link #onCreateInputConnection(EditorInfo)} to return true if - * a call on that method would return a non-null InputConnection, and - * they are really a first-class editor that the user would normally - * start typing on when the go into a window containing your view. - * - *

The default implementation always returns false. This does - * not mean that its {@link #onCreateInputConnection(EditorInfo)} - * will not be called or the user can not otherwise perform edits on your - * view; it is just a hint to the system that this is not the primary - * purpose of this view. - * - * @return Returns true if this view is a text editor, else false. - */ - public boolean onCheckIsTextEditor() { - return false; - } - /** - * Create a new InputConnection for an InputMethod to interact - * with the view. The default implementation returns null, since it doesn't - * support input methods. You can override this to implement such support. - * This is only needed for views that take focus and text input. - * - *

When implementing this, you probably also want to implement - * {@link #onCheckIsTextEditor()} to indicate you will return a - * non-null InputConnection. - * - * @param outAttrs Fill in with attribute information about the connection. - */ - public InputConnection onCreateInputConnection(EditorInfo outAttrs) { - return null; - } - /** - * Called by the {@link android.view.inputmethod.InputMethodManager} - * when a view who is not the current - * input connection target is trying to make a call on the manager. The - * default implementation returns false; you can override this to return - * true for certain views if you are performing InputConnection proxying - * to them. - * @param view The View that is making the InputMethodManager call. - * @return Return true to allow the call, false to reject. - */ - public boolean checkInputConnectionProxy(View view) { - return false; - } - /** - * Show the context menu for this view. It is not safe to hold on to the - * menu after returning from this method. - * - * You should normally not overload this method. Overload - * {@link #onCreateContextMenu(ContextMenu)} or define an - * {@link OnCreateContextMenuListener} to add items to the context menu. - * - * @param menu The context menu to populate - */ - public void createContextMenu(ContextMenu menu) { - ContextMenuInfo menuInfo = getContextMenuInfo(); - // Sets the current menu info so all items added to menu will have - // my extra info set. - ((MenuBuilder)menu).setCurrentMenuInfo(menuInfo); - onCreateContextMenu(menu); - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnCreateContextMenuListener != null) { - li.mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo); - } - // Clear the extra information so subsequent items that aren't mine don't - // have my extra info. - ((MenuBuilder)menu).setCurrentMenuInfo(null); - if (mParent != null) { - mParent.createContextMenu(menu); - } - } - /** - * Views should implement this if they have extra information to associate - * with the context menu. The return result is supplied as a parameter to - * the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} - * callback. - * - * @return Extra information about the item for which the context menu - * should be shown. This information will vary across different - * subclasses of View. - */ - protected ContextMenuInfo getContextMenuInfo() { - return null; - } - /** - * Views should implement this if the view itself is going to add items to - * the context menu. - * - * @param menu the context menu to populate - */ - protected void onCreateContextMenu(ContextMenu menu) { - } - /** - * Implement this method to handle trackball motion events. The - * relative movement of the trackball since the last event - * can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and - * {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so - * that a movement of 1 corresponds to the user pressing one DPAD key (so - * they will often be fractional values, representing the more fine-grained - * movement information available from a trackball). - * - * @param event The motion event. - * @return True if the event was handled, false otherwise. - */ - public boolean onTrackballEvent(MotionEvent event) { - return false; - } - /** - * Implement this method to handle generic motion events. - *

- * Generic motion events describe joystick movements, mouse hovers, track pad - * touches, scroll wheel movements and other input events. The - * {@link MotionEvent#getSource() source} of the motion event specifies - * the class of input that was received. Implementations of this method - * must examine the bits in the source before processing the event. - * The following code example shows how this is done. - *

- * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} - * are delivered to the view under the pointer. All other generic motion events are - * delivered to the focused view. - *

- * 
 public boolean onGenericMotionEvent(MotionEvent event) {
-     *     if ((event.getSource() & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) {
-     *         if (event.getAction() == MotionEvent.ACTION_MOVE) {
-     *             // process the joystick movement...
-     *             return true;
-     *         }
-     *     }
-     *     if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) {
-     *         switch (event.getAction()) {
-     *             case MotionEvent.ACTION_HOVER_MOVE:
-     *                 // process the mouse hover movement...
-     *                 return true;
-     *             case MotionEvent.ACTION_SCROLL:
-     *                 // process the scroll wheel movement...
-     *                 return true;
-     *         }
-     *     }
-     *     return super.onGenericMotionEvent(event);
-     * }
- * - * @param event The generic motion event being processed. - * @return True if the event was handled, false otherwise. - */ - public boolean onGenericMotionEvent(MotionEvent event) { - return false; - } - /** - * Implement this method to handle hover events. - *

- * This method is called whenever a pointer is hovering into, over, or out of the - * bounds of a view and the view is not currently being touched. - * Hover events are represented as pointer events with action - * {@link MotionEvent#ACTION_HOVER_ENTER}, {@link MotionEvent#ACTION_HOVER_MOVE}, - * or {@link MotionEvent#ACTION_HOVER_EXIT}. - *

- *
    - *
  • The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_ENTER} - * when the pointer enters the bounds of the view.
    • - *
  • The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_MOVE} - * when the pointer has already entered the bounds of the view and has moved.
    • - *
  • The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_EXIT} - * when the pointer has exited the bounds of the view or when the pointer is - * about to go down due to a button click, tap, or similar user action that - * causes the view to be touched.
    • - *
- *

- * The view should implement this method to return true to indicate that it is - * handling the hover event, such as by changing its drawable state. - *

- * The default implementation calls {@link #setHovered} to update the hovered state - * of the view when a hover enter or hover exit event is received, if the view - * is enabled and is clickable. The default implementation also sends hover - * accessibility events. - *

- * - * @param event The motion event that describes the hover. - * @return True if the view handled the hover event. - * - * @see #isHovered - * @see #setHovered - * @see #onHoverChanged - */ - public boolean onHoverEvent(MotionEvent event) { - // The root view may receive hover (or touch) events that are outside the bounds of - // the window. This code ensures that we only send accessibility events for - // hovers that are actually within the bounds of the root view. - final int action = event.getAction(); - if (!mSendingHoverAccessibilityEvents) { - if ((action == MotionEvent.ACTION_HOVER_ENTER - || action == MotionEvent.ACTION_HOVER_MOVE) - && !hasHoveredChild() - && pointInView(event.getX(), event.getY())) { - mSendingHoverAccessibilityEvents = true; - sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); - } - } else { - if (action == MotionEvent.ACTION_HOVER_EXIT - || (action == MotionEvent.ACTION_HOVER_MOVE - && !pointInView(event.getX(), event.getY()))) { - mSendingHoverAccessibilityEvents = false; - sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); - } - } - if (isHoverable()) { - switch (action) { - case MotionEvent.ACTION_HOVER_ENTER: - setHovered(true); - break; - case MotionEvent.ACTION_HOVER_EXIT: - setHovered(false); - break; - } - // Dispatch the event to onGenericMotionEvent before returning true. - // This is to provide compatibility with existing applications that - // handled HOVER_MOVE events in onGenericMotionEvent and that would - // break because of the new default handling for hoverable views - // in onHoverEvent. - // Note that onGenericMotionEvent will be called by default when - // onHoverEvent returns false (refer to dispatchGenericMotionEvent). - dispatchGenericMotionEventInternal(event); - return true; - } - return false; - } - /** - * Returns true if the view should handle {@link #onHoverEvent} - * by calling {@link #setHovered} to change its hovered state. - * - * @return True if the view is hoverable. - */ - private boolean isHoverable() { - final int viewFlags = mViewFlags; - //noinspection SimplifiableIfStatement - if ((viewFlags & ENABLED_MASK) == DISABLED) { - return false; - } - return (viewFlags & CLICKABLE) == CLICKABLE - || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; - } - /** - * Returns true if the view is currently hovered. - * - * @return True if the view is currently hovered. - * - * @see #setHovered - * @see #onHoverChanged - */ - @ViewDebug.ExportedProperty - public boolean isHovered() { - return (mPrivateFlags & HOVERED) != 0; - } - /** - * Sets whether the view is currently hovered. - *

- * Calling this method also changes the drawable state of the view. This - * enables the view to react to hover by using different drawable resources - * to change its appearance. - *

- * The {@link #onHoverChanged} method is called when the hovered state changes. - *

- * - * @param hovered True if the view is hovered. - * - * @see #isHovered - * @see #onHoverChanged - */ - public void setHovered(boolean hovered) { - if (hovered) { - if ((mPrivateFlags & HOVERED) == 0) { - mPrivateFlags |= HOVERED; - refreshDrawableState(); - onHoverChanged(true); - } - } else { - if ((mPrivateFlags & HOVERED) != 0) { - mPrivateFlags &= ~HOVERED; - refreshDrawableState(); - onHoverChanged(false); - } - } - } - /** - * Implement this method to handle hover state changes. - *

- * This method is called whenever the hover state changes as a result of a - * call to {@link #setHovered}. - *

- * - * @param hovered The current hover state, as returned by {@link #isHovered}. - * - * @see #isHovered - * @see #setHovered - */ - public void onHoverChanged(boolean hovered) { - } - /** - * Implement this method to handle touch screen motion events. - * - * @param event The motion event. - * @return True if the event was handled, false otherwise. - */ - public boolean onTouchEvent(MotionEvent event) { - final int viewFlags = mViewFlags; - if ((viewFlags & ENABLED_MASK) == DISABLED) { - if (event.getAction() == MotionEvent.ACTION_UP && (mPrivateFlags & PRESSED) != 0) { - mPrivateFlags &= ~PRESSED; - refreshDrawableState(); - } - // A disabled view that is clickable still consumes the touch - // events, it just doesn't respond to them. - return (((viewFlags & CLICKABLE) == CLICKABLE || - (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)); - } - if (mTouchDelegate != null) { - if (mTouchDelegate.onTouchEvent(event)) { - return true; - } - } - if (((viewFlags & CLICKABLE) == CLICKABLE || - (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)) { - switch (event.getAction()) { - case MotionEvent.ACTION_UP: - boolean prepressed = (mPrivateFlags & PREPRESSED) != 0; - if ((mPrivateFlags & PRESSED) != 0 || prepressed) { - // take focus if we don't have it already and we should in - // touch mode. - boolean focusTaken = false; - if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { - focusTaken = requestFocus(); - } - if (prepressed) { - // The button is being released before we actually - // showed it as pressed. Make it show the pressed - // state now (before scheduling the click) to ensure - // the user sees it. - mPrivateFlags |= PRESSED; - refreshDrawableState(); - } - if (!mHasPerformedLongPress) { - // This is a tap, so remove the longpress check - removeLongPressCallback(); - // Only perform take click actions if we were in the pressed state - if (!focusTaken) { - // Use a Runnable and post this rather than calling - // performClick directly. This lets other visual state - // of the view update before click actions start. - if (mPerformClick == null) { - mPerformClick = new PerformClick(); - } - if (!post(mPerformClick)) { - performClick(); - } - } - } - if (mUnsetPressedState == null) { - mUnsetPressedState = new UnsetPressedState(); - } - if (prepressed) { - postDelayed(mUnsetPressedState, - ViewConfiguration.getPressedStateDuration()); - } else if (!post(mUnsetPressedState)) { - // If the post failed, unpress right now - mUnsetPressedState.run(); - } - removeTapCallback(); - } - break; - case MotionEvent.ACTION_DOWN: - mHasPerformedLongPress = false; - if (performButtonActionOnTouchDown(event)) { - break; - } - // Walk up the hierarchy to determine if we're inside a scrolling container. - boolean isInScrollingContainer = isInScrollingContainer(); - // For views inside a scrolling container, delay the pressed feedback for - // a short period in case this is a scroll. - if (isInScrollingContainer) { - mPrivateFlags |= PREPRESSED; - if (mPendingCheckForTap == null) { - mPendingCheckForTap = new CheckForTap(); - } - postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout()); - } else { - // Not inside a scrolling container, so show the feedback right away - mPrivateFlags |= PRESSED; - refreshDrawableState(); - checkForLongClick(0); - } - break; - case MotionEvent.ACTION_CANCEL: - mPrivateFlags &= ~PRESSED; - refreshDrawableState(); - removeTapCallback(); - break; - case MotionEvent.ACTION_MOVE: - final int x = (int) event.getX(); - final int y = (int) event.getY(); - // Be lenient about moving outside of buttons - if (!pointInView(x, y, mTouchSlop)) { - // Outside button - removeTapCallback(); - if ((mPrivateFlags & PRESSED) != 0) { - // Remove any future long press/tap checks - removeLongPressCallback(); - // Need to switch from pressed to not pressed - mPrivateFlags &= ~PRESSED; - refreshDrawableState(); - } - } - break; - } - return true; - } - return false; - } - /** - * @hide - */ - public boolean isInScrollingContainer() { - ViewParent p = getParent(); - while (p != null && p instanceof ViewGroup) { - if (((ViewGroup) p).shouldDelayChildPressedState()) { - return true; - } - p = p.getParent(); - } - return false; - } - /** - * Remove the longpress detection timer. - */ - private void removeLongPressCallback() { - if (mPendingCheckForLongPress != null) { - removeCallbacks(mPendingCheckForLongPress); - } - } - /** - * Remove the pending click action - */ - private void removePerformClickCallback() { - if (mPerformClick != null) { - removeCallbacks(mPerformClick); - } - } - /** - * Remove the prepress detection timer. - */ - private void removeUnsetPressCallback() { - if ((mPrivateFlags & PRESSED) != 0 && mUnsetPressedState != null) { - setPressed(false); - removeCallbacks(mUnsetPressedState); - } - } - /** - * Remove the tap detection timer. - */ - private void removeTapCallback() { - if (mPendingCheckForTap != null) { - mPrivateFlags &= ~PREPRESSED; - removeCallbacks(mPendingCheckForTap); - } - } - /** - * Cancels a pending long press. Your subclass can use this if you - * want the context menu to come up if the user presses and holds - * at the same place, but you don't want it to come up if they press - * and then move around enough to cause scrolling. - */ - public void cancelLongPress() { - removeLongPressCallback(); - /* - * The prepressed state handled by the tap callback is a display - * construct, but the tap callback will post a long press callback - * less its own timeout. Remove it here. - */ - removeTapCallback(); - } - /** - * Remove the pending callback for sending a - * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. - */ - private void removeSendViewScrolledAccessibilityEventCallback() { - if (mSendViewScrolledAccessibilityEvent != null) { - removeCallbacks(mSendViewScrolledAccessibilityEvent); - } - } - /** - * Sets the TouchDelegate for this View. - */ - public void setTouchDelegate(TouchDelegate delegate) { - mTouchDelegate = delegate; - } - /** - * Gets the TouchDelegate for this View. - */ - public TouchDelegate getTouchDelegate() { - return mTouchDelegate; - } - /** - * Set flags controlling behavior of this view. - * - * @param flags Constant indicating the value which should be set - * @param mask Constant indicating the bit range that should be changed - */ - void setFlags(int flags, int mask) { - int old = mViewFlags; - mViewFlags = (mViewFlags & ~mask) | (flags & mask); - int changed = mViewFlags ^ old; - if (changed == 0) { - return; - } - int privateFlags = mPrivateFlags; - /* Check if the FOCUSABLE bit has changed */ - if (((changed & FOCUSABLE_MASK) != 0) && - ((privateFlags & HAS_BOUNDS) !=0)) { - if (((old & FOCUSABLE_MASK) == FOCUSABLE) - && ((privateFlags & FOCUSED) != 0)) { - /* Give up focus if we are no longer focusable */ - clearFocus(); - } else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE) - && ((privateFlags & FOCUSED) == 0)) { - /* - * Tell the view system that we are now available to take focus - * if no one else already has it. - */ - if (mParent != null) mParent.focusableViewAvailable(this); - } - } - if ((flags & VISIBILITY_MASK) == VISIBLE) { - if ((changed & VISIBILITY_MASK) != 0) { - /* - * If this view is becoming visible, invalidate it in case it changed while - * it was not visible. Marking it drawn ensures that the invalidation will - * go through. - */ - mPrivateFlags |= DRAWN; - invalidate(true); - needGlobalAttributesUpdate(true); - // a view becoming visible is worth notifying the parent - // about in case nothing has focus. even if this specific view - // isn't focusable, it may contain something that is, so let - // the root view try to give this focus if nothing else does. - if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) { - mParent.focusableViewAvailable(this); - } - } - } - /* Check if the GONE bit has changed */ - if ((changed & GONE) != 0) { - needGlobalAttributesUpdate(false); - requestLayout(); - if (((mViewFlags & VISIBILITY_MASK) == GONE)) { - if (hasFocus()) clearFocus(); - destroyDrawingCache(); - if (mParent instanceof View) { - // GONE views noop invalidation, so invalidate the parent - ((View) mParent).invalidate(true); - } - // Mark the view drawn to ensure that it gets invalidated properly the next - // time it is visible and gets invalidated - mPrivateFlags |= DRAWN; - } - if (mAttachInfo != null) { - mAttachInfo.mViewVisibilityChanged = true; - } - } - /* Check if the VISIBLE bit has changed */ - if ((changed & INVISIBLE) != 0) { - needGlobalAttributesUpdate(false); - /* - * If this view is becoming invisible, set the DRAWN flag so that - * the next invalidate() will not be skipped. - */ - mPrivateFlags |= DRAWN; - if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE) && hasFocus()) { - // root view becoming invisible shouldn't clear focus - if (getRootView() != this) { - clearFocus(); - } - } - if (mAttachInfo != null) { - mAttachInfo.mViewVisibilityChanged = true; - } - } - if ((changed & VISIBILITY_MASK) != 0) { - if (mParent instanceof ViewGroup) { - ((ViewGroup) mParent).onChildVisibilityChanged(this, (changed & VISIBILITY_MASK), - (flags & VISIBILITY_MASK)); - ((View) mParent).invalidate(true); - } else if (mParent != null) { - mParent.invalidateChild(this, null); - } - dispatchVisibilityChanged(this, (flags & VISIBILITY_MASK)); - } - if ((changed & WILL_NOT_CACHE_DRAWING) != 0) { - destroyDrawingCache(); - } - if ((changed & DRAWING_CACHE_ENABLED) != 0) { - destroyDrawingCache(); - mPrivateFlags &= ~DRAWING_CACHE_VALID; - invalidateParentCaches(); - } - if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) { - destroyDrawingCache(); - mPrivateFlags &= ~DRAWING_CACHE_VALID; - } - if ((changed & DRAW_MASK) != 0) { - if ((mViewFlags & WILL_NOT_DRAW) != 0) { - if (mBGDrawable != null) { - mPrivateFlags &= ~SKIP_DRAW; - mPrivateFlags |= ONLY_DRAWS_BACKGROUND; - } else { - mPrivateFlags |= SKIP_DRAW; - } - } else { - mPrivateFlags &= ~SKIP_DRAW; - } - requestLayout(); - invalidate(true); - } - if ((changed & KEEP_SCREEN_ON) != 0) { - if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { - mParent.recomputeViewAttributes(this); - } - } - if ((changed & LAYOUT_DIRECTION_MASK) != 0) { - requestLayout(); - } - } - /** - * Change the view's z order in the tree, so it's on top of other sibling - * views - */ - public void bringToFront() { - if (mParent != null) { - mParent.bringChildToFront(this); - } - } - /** - * This is called in response to an internal scroll in this view (i.e., the - * view scrolled its own contents). This is typically as a result of - * {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been - * called. - * - * @param l Current horizontal scroll origin. - * @param t Current vertical scroll origin. - * @param oldl Previous horizontal scroll origin. - * @param oldt Previous vertical scroll origin. - */ - protected void onScrollChanged(int l, int t, int oldl, int oldt) { - if (AccessibilityManager.getInstance(mContext).isEnabled()) { - postSendViewScrolledAccessibilityEventCallback(); - } - mBackgroundSizeChanged = true; - final AttachInfo ai = mAttachInfo; - if (ai != null) { - ai.mViewScrollChanged = true; - } - } - /** - * Interface definition for a callback to be invoked when the layout bounds of a view - * changes due to layout processing. - */ - public interface OnLayoutChangeListener { - /** - * Called when the focus state of a view has changed. - * - * @param v The view whose state has changed. - * @param left The new value of the view's left property. - * @param top The new value of the view's top property. - * @param right The new value of the view's right property. - * @param bottom The new value of the view's bottom property. - * @param oldLeft The previous value of the view's left property. - * @param oldTop The previous value of the view's top property. - * @param oldRight The previous value of the view's right property. - * @param oldBottom The previous value of the view's bottom property. - */ - void onLayoutChange(View v, int left, int top, int right, int bottom, - int oldLeft, int oldTop, int oldRight, int oldBottom); - } - /** - * This is called during layout when the size of this view has changed. If - * you were just added to the view hierarchy, you're called with the old - * values of 0. - * - * @param w Current width of this view. - * @param h Current height of this view. - * @param oldw Old width of this view. - * @param oldh Old height of this view. - */ - protected void onSizeChanged(int w, int h, int oldw, int oldh) { - } - /** - * Called by draw to draw the child views. This may be overridden - * by derived classes to gain control just before its children are drawn - * (but after its own view has been drawn). - * @param canvas the canvas on which to draw the view - */ - protected void dispatchDraw(Canvas canvas) { - } - /** - * Gets the parent of this view. Note that the parent is a - * ViewParent and not necessarily a View. - * - * @return Parent of this view. - */ - public final ViewParent getParent() { - return mParent; - } - /** - * Set the horizontal scrolled position of your view. This will cause a call to - * {@link #onScrollChanged(int, int, int, int)} and the view will be - * invalidated. - * @param value the x position to scroll to - */ - public void setScrollX(int value) { - scrollTo(value, mScrollY); - } - /** - * Set the vertical scrolled position of your view. This will cause a call to - * {@link #onScrollChanged(int, int, int, int)} and the view will be - * invalidated. - * @param value the y position to scroll to - */ - public void setScrollY(int value) { - scrollTo(mScrollX, value); - } - /** - * Return the scrolled left position of this view. This is the left edge of - * the displayed part of your view. You do not need to draw any pixels - * farther left, since those are outside of the frame of your view on - * screen. - * - * @return The left edge of the displayed part of your view, in pixels. - */ - public final int getScrollX() { - return mScrollX; - } - /** - * Return the scrolled top position of this view. This is the top edge of - * the displayed part of your view. You do not need to draw any pixels above - * it, since those are outside of the frame of your view on screen. - * - * @return The top edge of the displayed part of your view, in pixels. - */ - public final int getScrollY() { - return mScrollY; - } - /** - * Return the width of the your view. - * - * @return The width of your view, in pixels. - */ - @ViewDebug.ExportedProperty(category = "layout") - public final int getWidth() { - return mRight - mLeft; - } - /** - * Return the height of your view. - * - * @return The height of your view, in pixels. - */ - @ViewDebug.ExportedProperty(category = "layout") - public final int getHeight() { - return mBottom - mTop; - } - /** - * Return the visible drawing bounds of your view. Fills in the output - * rectangle with the values from getScrollX(), getScrollY(), - * getWidth(), and getHeight(). - * - * @param outRect The (scrolled) drawing bounds of the view. - */ - public void getDrawingRect(Rect outRect) { - outRect.left = mScrollX; - outRect.top = mScrollY; - outRect.right = mScrollX + (mRight - mLeft); - outRect.bottom = mScrollY + (mBottom - mTop); - } - /** - * Like {@link #getMeasuredWidthAndState()}, but only returns the - * raw width component (that is the result is masked by - * {@link #MEASURED_SIZE_MASK}). - * - * @return The raw measured width of this view. - */ - public final int getMeasuredWidth() { - return mMeasuredWidth & MEASURED_SIZE_MASK; - } - /** - * Return the full width measurement information for this view as computed - * by the most recent call to {@link #measure(int, int)}. This result is a bit mask - * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. - * This should be used during measurement and layout calculations only. Use - * {@link #getWidth()} to see how wide a view is after layout. - * - * @return The measured width of this view as a bit mask. - */ - public final int getMeasuredWidthAndState() { - return mMeasuredWidth; - } - /** - * Like {@link #getMeasuredHeightAndState()}, but only returns the - * raw width component (that is the result is masked by - * {@link #MEASURED_SIZE_MASK}). - * - * @return The raw measured height of this view. - */ - public final int getMeasuredHeight() { - return mMeasuredHeight & MEASURED_SIZE_MASK; - } - /** - * Return the full height measurement information for this view as computed - * by the most recent call to {@link #measure(int, int)}. This result is a bit mask - * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. - * This should be used during measurement and layout calculations only. Use - * {@link #getHeight()} to see how wide a view is after layout. - * - * @return The measured width of this view as a bit mask. - */ - public final int getMeasuredHeightAndState() { - return mMeasuredHeight; - } - /** - * Return only the state bits of {@link #getMeasuredWidthAndState()} - * and {@link #getMeasuredHeightAndState()}, combined into one integer. - * The width component is in the regular bits {@link #MEASURED_STATE_MASK} - * and the height component is at the shifted bits - * {@link #MEASURED_HEIGHT_STATE_SHIFT}>>{@link #MEASURED_STATE_MASK}. - */ - public final int getMeasuredState() { - return (mMeasuredWidth&MEASURED_STATE_MASK) - | ((mMeasuredHeight>>MEASURED_HEIGHT_STATE_SHIFT) - & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); - } - /** - * The transform matrix of this view, which is calculated based on the current - * roation, scale, and pivot properties. - * - * @see #getRotation() - * @see #getScaleX() - * @see #getScaleY() - * @see #getPivotX() - * @see #getPivotY() - * @return The current transform matrix for the view - */ - public Matrix getMatrix() { - if (mTransformationInfo != null) { - updateMatrix(); - return mTransformationInfo.mMatrix; - } - return Matrix.IDENTITY_MATRIX; - } - /** - * Utility function to determine if the value is far enough away from zero to be - * considered non-zero. - * @param value A floating point value to check for zero-ness - * @return whether the passed-in value is far enough away from zero to be considered non-zero - */ - private static boolean nonzero(float value) { - return (value < -NONZERO_EPSILON || value > NONZERO_EPSILON); - } - /** - * Returns true if the transform matrix is the identity matrix. - * Recomputes the matrix if necessary. - * - * @return True if the transform matrix is the identity matrix, false otherwise. - */ - final boolean hasIdentityMatrix() { - if (mTransformationInfo != null) { - updateMatrix(); - return mTransformationInfo.mMatrixIsIdentity; - } - return true; - } - void ensureTransformationInfo() { - if (mTransformationInfo == null) { - mTransformationInfo = new TransformationInfo(); - } - } - /** - * Recomputes the transform matrix if necessary. - */ - private void updateMatrix() { - final TransformationInfo info = mTransformationInfo; - if (info == null) { - return; - } - if (info.mMatrixDirty) { - // transform-related properties have changed since the last time someone - // asked for the matrix; recalculate it with the current values - // Figure out if we need to update the pivot point - if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { - if ((mRight - mLeft) != info.mPrevWidth || (mBottom - mTop) != info.mPrevHeight) { - info.mPrevWidth = mRight - mLeft; - info.mPrevHeight = mBottom - mTop; - info.mPivotX = info.mPrevWidth / 2f; - info.mPivotY = info.mPrevHeight / 2f; - } - } - info.mMatrix.reset(); - if (!nonzero(info.mRotationX) && !nonzero(info.mRotationY)) { - info.mMatrix.setTranslate(info.mTranslationX, info.mTranslationY); - info.mMatrix.preRotate(info.mRotation, info.mPivotX, info.mPivotY); - info.mMatrix.preScale(info.mScaleX, info.mScaleY, info.mPivotX, info.mPivotY); - } else { - if (info.mCamera == null) { - info.mCamera = new Camera(); - info.matrix3D = new Matrix(); - } - info.mCamera.save(); - info.mMatrix.preScale(info.mScaleX, info.mScaleY, info.mPivotX, info.mPivotY); - info.mCamera.rotate(info.mRotationX, info.mRotationY, -info.mRotation); - info.mCamera.getMatrix(info.matrix3D); - info.matrix3D.preTranslate(-info.mPivotX, -info.mPivotY); - info.matrix3D.postTranslate(info.mPivotX + info.mTranslationX, - info.mPivotY + info.mTranslationY); - info.mMatrix.postConcat(info.matrix3D); - info.mCamera.restore(); - } - info.mMatrixDirty = false; - info.mMatrixIsIdentity = info.mMatrix.isIdentity(); - info.mInverseMatrixDirty = true; - } - } - /** - * Utility method to retrieve the inverse of the current mMatrix property. - * We cache the matrix to avoid recalculating it when transform properties - * have not changed. - * - * @return The inverse of the current matrix of this view. - */ - final Matrix getInverseMatrix() { - final TransformationInfo info = mTransformationInfo; - if (info != null) { - updateMatrix(); - if (info.mInverseMatrixDirty) { - if (info.mInverseMatrix == null) { - info.mInverseMatrix = new Matrix(); - } - info.mMatrix.invert(info.mInverseMatrix); - info.mInverseMatrixDirty = false; - } - return info.mInverseMatrix; - } - return Matrix.IDENTITY_MATRIX; - } - /** - *

Sets the distance along the Z axis (orthogonal to the X/Y plane on which - * views are drawn) from the camera to this view. The camera's distance - * affects 3D transformations, for instance rotations around the X and Y - * axis. If the rotationX or rotationY properties are changed and this view is - * large (more than half the size of the screen), it is recommended to always - * use a camera distance that's greater than the height (X axis rotation) or - * the width (Y axis rotation) of this view.

- * - *

The distance of the camera from the view plane can have an affect on the - * perspective distortion of the view when it is rotated around the x or y axis. - * For example, a large distance will result in a large viewing angle, and there - * will not be much perspective distortion of the view as it rotates. A short - * distance may cause much more perspective distortion upon rotation, and can - * also result in some drawing artifacts if the rotated view ends up partially - * behind the camera (which is why the recommendation is to use a distance at - * least as far as the size of the view, if the view is to be rotated.)

- * - *

The distance is expressed in "depth pixels." The default distance depends - * on the screen density. For instance, on a medium density display, the - * default distance is 1280. On a high density display, the default distance - * is 1920.

- * - *

If you want to specify a distance that leads to visually consistent - * results across various densities, use the following formula:

- * 
-     * float scale = context.getResources().getDisplayMetrics().density;
-     * view.setCameraDistance(distance * scale);
-     *
- * - *

The density scale factor of a high density display is 1.5, - * and 1920 = 1280 * 1.5.

- * - * @param distance The distance in "depth pixels", if negative the opposite - * value is used - * - * @see #setRotationX(float) - * @see #setRotationY(float) - */ - public void setCameraDistance(float distance) { - invalidateParentCaches(); - invalidate(false); - ensureTransformationInfo(); - final float dpi = mResources.getDisplayMetrics().densityDpi; - final TransformationInfo info = mTransformationInfo; - if (info.mCamera == null) { - info.mCamera = new Camera(); - info.matrix3D = new Matrix(); - } - info.mCamera.setLocation(0.0f, 0.0f, -Math.abs(distance) / dpi); - info.mMatrixDirty = true; - invalidate(false); - } - /** - * The degrees that the view is rotated around the pivot point. - * - * @see #setRotation(float) - * @see #getPivotX() - * @see #getPivotY() - * - * @return The degrees of rotation. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getRotation() { - return mTransformationInfo != null ? mTransformationInfo.mRotation : 0; - } - /** - * Sets the degrees that the view is rotated around the pivot point. Increasing values - * result in clockwise rotation. - * - * @param rotation The degrees of rotation. - * - * @see #getRotation() - * @see #getPivotX() - * @see #getPivotY() - * @see #setRotationX(float) - * @see #setRotationY(float) - * - * @attr ref android.R.styleable#View_rotation - */ - public void setRotation(float rotation) { - ensureTransformationInfo(); - final TransformationInfo info = mTransformationInfo; - if (info.mRotation != rotation) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mRotation = rotation; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * The degrees that the view is rotated around the vertical axis through the pivot point. - * - * @see #getPivotX() - * @see #getPivotY() - * @see #setRotationY(float) - * - * @return The degrees of Y rotation. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getRotationY() { - return mTransformationInfo != null ? mTransformationInfo.mRotationY : 0; - } - /** - * Sets the degrees that the view is rotated around the vertical axis through the pivot point. - * Increasing values result in counter-clockwise rotation from the viewpoint of looking - * down the y axis. - * - * When rotating large views, it is recommended to adjust the camera distance - * accordingly. Refer to {@link #setCameraDistance(float)} for more information. - * - * @param rotationY The degrees of Y rotation. - * - * @see #getRotationY() - * @see #getPivotX() - * @see #getPivotY() - * @see #setRotation(float) - * @see #setRotationX(float) - * @see #setCameraDistance(float) - * - * @attr ref android.R.styleable#View_rotationY - */ - public void setRotationY(float rotationY) { - ensureTransformationInfo(); - final TransformationInfo info = mTransformationInfo; - if (info.mRotationY != rotationY) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mRotationY = rotationY; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * The degrees that the view is rotated around the horizontal axis through the pivot point. - * - * @see #getPivotX() - * @see #getPivotY() - * @see #setRotationX(float) - * - * @return The degrees of X rotation. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getRotationX() { - return mTransformationInfo != null ? mTransformationInfo.mRotationX : 0; - } - /** - * Sets the degrees that the view is rotated around the horizontal axis through the pivot point. - * Increasing values result in clockwise rotation from the viewpoint of looking down the - * x axis. - * - * When rotating large views, it is recommended to adjust the camera distance - * accordingly. Refer to {@link #setCameraDistance(float)} for more information. - * - * @param rotationX The degrees of X rotation. - * - * @see #getRotationX() - * @see #getPivotX() - * @see #getPivotY() - * @see #setRotation(float) - * @see #setRotationY(float) - * @see #setCameraDistance(float) - * - * @attr ref android.R.styleable#View_rotationX - */ - public void setRotationX(float rotationX) { - ensureTransformationInfo(); - final TransformationInfo info = mTransformationInfo; - if (info.mRotationX != rotationX) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mRotationX = rotationX; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * The amount that the view is scaled in x around the pivot point, as a proportion of - * the view's unscaled width. A value of 1, the default, means that no scaling is applied. - * - *

By default, this is 1.0f. - * - * @see #getPivotX() - * @see #getPivotY() - * @return The scaling factor. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getScaleX() { - return mTransformationInfo != null ? mTransformationInfo.mScaleX : 1; - } - /** - * Sets the amount that the view is scaled in x around the pivot point, as a proportion of - * the view's unscaled width. A value of 1 means that no scaling is applied. - * - * @param scaleX The scaling factor. - * @see #getPivotX() - * @see #getPivotY() - * - * @attr ref android.R.styleable#View_scaleX - */ - public void setScaleX(float scaleX) { - ensureTransformationInfo(); - final TransformationInfo info = mTransformationInfo; - if (info.mScaleX != scaleX) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mScaleX = scaleX; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * The amount that the view is scaled in y around the pivot point, as a proportion of - * the view's unscaled height. A value of 1, the default, means that no scaling is applied. - * - *

By default, this is 1.0f. - * - * @see #getPivotX() - * @see #getPivotY() - * @return The scaling factor. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getScaleY() { - return mTransformationInfo != null ? mTransformationInfo.mScaleY : 1; - } - /** - * Sets the amount that the view is scaled in Y around the pivot point, as a proportion of - * the view's unscaled width. A value of 1 means that no scaling is applied. - * - * @param scaleY The scaling factor. - * @see #getPivotX() - * @see #getPivotY() - * - * @attr ref android.R.styleable#View_scaleY - */ - public void setScaleY(float scaleY) { - ensureTransformationInfo(); - final TransformationInfo info = mTransformationInfo; - if (info.mScaleY != scaleY) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mScaleY = scaleY; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * The x location of the point around which the view is {@link #setRotation(float) rotated} - * and {@link #setScaleX(float) scaled}. - * - * @see #getRotation() - * @see #getScaleX() - * @see #getScaleY() - * @see #getPivotY() - * @return The x location of the pivot point. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getPivotX() { - return mTransformationInfo != null ? mTransformationInfo.mPivotX : 0; - } - /** - * Sets the x location of the point around which the view is - * {@link #setRotation(float) rotated} and {@link #setScaleX(float) scaled}. - * By default, the pivot point is centered on the object. - * Setting this property disables this behavior and causes the view to use only the - * explicitly set pivotX and pivotY values. - * - * @param pivotX The x location of the pivot point. - * @see #getRotation() - * @see #getScaleX() - * @see #getScaleY() - * @see #getPivotY() - * - * @attr ref android.R.styleable#View_transformPivotX - */ - public void setPivotX(float pivotX) { - ensureTransformationInfo(); - mPrivateFlags |= PIVOT_EXPLICITLY_SET; - final TransformationInfo info = mTransformationInfo; - if (info.mPivotX != pivotX) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mPivotX = pivotX; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * The y location of the point around which the view is {@link #setRotation(float) rotated} - * and {@link #setScaleY(float) scaled}. - * - * @see #getRotation() - * @see #getScaleX() - * @see #getScaleY() - * @see #getPivotY() - * @return The y location of the pivot point. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getPivotY() { - return mTransformationInfo != null ? mTransformationInfo.mPivotY : 0; - } - /** - * Sets the y location of the point around which the view is {@link #setRotation(float) rotated} - * and {@link #setScaleY(float) scaled}. By default, the pivot point is centered on the object. - * Setting this property disables this behavior and causes the view to use only the - * explicitly set pivotX and pivotY values. - * - * @param pivotY The y location of the pivot point. - * @see #getRotation() - * @see #getScaleX() - * @see #getScaleY() - * @see #getPivotY() - * - * @attr ref android.R.styleable#View_transformPivotY - */ - public void setPivotY(float pivotY) { - ensureTransformationInfo(); - mPrivateFlags |= PIVOT_EXPLICITLY_SET; - final TransformationInfo info = mTransformationInfo; - if (info.mPivotY != pivotY) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mPivotY = pivotY; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * The opacity of the view. This is a value from 0 to 1, where 0 means the view is - * completely transparent and 1 means the view is completely opaque. - * - *

By default this is 1.0f. - * @return The opacity of the view. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getAlpha() { - return mTransformationInfo != null ? mTransformationInfo.mAlpha : 1; - } - /** - *

Sets the opacity of the view. This is a value from 0 to 1, where 0 means the view is - * completely transparent and 1 means the view is completely opaque.

- * - *

If this view overrides {@link #onSetAlpha(int)} to return true, then this view is - * responsible for applying the opacity itself. Otherwise, calling this method is - * equivalent to calling {@link #setLayerType(int, android.graphics.Paint)} and - * setting a hardware layer.

- * - *

Note that setting alpha to a translucent value (0 < alpha < 1) may have - * performance implications. It is generally best to use the alpha property sparingly and - * transiently, as in the case of fading animations.

- * - * @param alpha The opacity of the view. - * - * @see #setLayerType(int, android.graphics.Paint) - * - * @attr ref android.R.styleable#View_alpha - */ - public void setAlpha(float alpha) { - ensureTransformationInfo(); - if (mTransformationInfo.mAlpha != alpha) { - mTransformationInfo.mAlpha = alpha; - invalidateParentCaches(); - if (onSetAlpha((int) (alpha * 255))) { - mPrivateFlags |= ALPHA_SET; - // subclass is handling alpha - don't optimize rendering cache invalidation - invalidate(true); - } else { - mPrivateFlags &= ~ALPHA_SET; - invalidate(false); - } - } - } - /** - * Faster version of setAlpha() which performs the same steps except there are - * no calls to invalidate(). The caller of this function should perform proper invalidation - * on the parent and this object. The return value indicates whether the subclass handles - * alpha (the return value for onSetAlpha()). - * - * @param alpha The new value for the alpha property - * @return true if the View subclass handles alpha (the return value for onSetAlpha()) and - * the new value for the alpha property is different from the old value - */ - boolean setAlphaNoInvalidation(float alpha) { - ensureTransformationInfo(); - if (mTransformationInfo.mAlpha != alpha) { - mTransformationInfo.mAlpha = alpha; - boolean subclassHandlesAlpha = onSetAlpha((int) (alpha * 255)); - if (subclassHandlesAlpha) { - mPrivateFlags |= ALPHA_SET; - return true; - } else { - mPrivateFlags &= ~ALPHA_SET; - } - } - return false; - } - /** - * Top position of this view relative to its parent. - * - * @return The top of this view, in pixels. - */ - @ViewDebug.CapturedViewProperty - public final int getTop() { - return mTop; - } - /** - * Sets the top position of this view relative to its parent. This method is meant to be called - * by the layout system and should not generally be called otherwise, because the property - * may be changed at any time by the layout. - * - * @param top The top of this view, in pixels. - */ - public final void setTop(int top) { - if (top != mTop) { - updateMatrix(); - final boolean matrixIsIdentity = mTransformationInfo == null - || mTransformationInfo.mMatrixIsIdentity; - if (matrixIsIdentity) { - if (mAttachInfo != null) { - int minTop; - int yLoc; - if (top < mTop) { - minTop = top; - yLoc = top - mTop; - } else { - minTop = mTop; - yLoc = 0; - } - invalidate(0, yLoc, mRight - mLeft, mBottom - minTop); - } - } else { - // Double-invalidation is necessary to capture view's old and new areas - invalidate(true); - } - int width = mRight - mLeft; - int oldHeight = mBottom - mTop; - mTop = top; - onSizeChanged(width, mBottom - mTop, width, oldHeight); - if (!matrixIsIdentity) { - if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { - // A change in dimension means an auto-centered pivot point changes, too - mTransformationInfo.mMatrixDirty = true; - } - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(true); - } - mBackgroundSizeChanged = true; - invalidateParentIfNeeded(); - } - } - /** - * Bottom position of this view relative to its parent. - * - * @return The bottom of this view, in pixels. - */ - @ViewDebug.CapturedViewProperty - public final int getBottom() { - return mBottom; - } - /** - * True if this view has changed since the last time being drawn. - * - * @return The dirty state of this view. - */ - public boolean isDirty() { - return (mPrivateFlags & DIRTY_MASK) != 0; - } - /** - * Sets the bottom position of this view relative to its parent. This method is meant to be - * called by the layout system and should not generally be called otherwise, because the - * property may be changed at any time by the layout. - * - * @param bottom The bottom of this view, in pixels. - */ - public final void setBottom(int bottom) { - if (bottom != mBottom) { - updateMatrix(); - final boolean matrixIsIdentity = mTransformationInfo == null - || mTransformationInfo.mMatrixIsIdentity; - if (matrixIsIdentity) { - if (mAttachInfo != null) { - int maxBottom; - if (bottom < mBottom) { - maxBottom = mBottom; - } else { - maxBottom = bottom; - } - invalidate(0, 0, mRight - mLeft, maxBottom - mTop); - } - } else { - // Double-invalidation is necessary to capture view's old and new areas - invalidate(true); - } - int width = mRight - mLeft; - int oldHeight = mBottom - mTop; - mBottom = bottom; - onSizeChanged(width, mBottom - mTop, width, oldHeight); - if (!matrixIsIdentity) { - if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { - // A change in dimension means an auto-centered pivot point changes, too - mTransformationInfo.mMatrixDirty = true; - } - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(true); - } - mBackgroundSizeChanged = true; - invalidateParentIfNeeded(); - } - } - /** - * Left position of this view relative to its parent. - * - * @return The left edge of this view, in pixels. - */ - @ViewDebug.CapturedViewProperty - public final int getLeft() { - return mLeft; - } - /** - * Sets the left position of this view relative to its parent. This method is meant to be called - * by the layout system and should not generally be called otherwise, because the property - * may be changed at any time by the layout. - * - * @param left The bottom of this view, in pixels. - */ - public final void setLeft(int left) { - if (left != mLeft) { - updateMatrix(); - final boolean matrixIsIdentity = mTransformationInfo == null - || mTransformationInfo.mMatrixIsIdentity; - if (matrixIsIdentity) { - if (mAttachInfo != null) { - int minLeft; - int xLoc; - if (left < mLeft) { - minLeft = left; - xLoc = left - mLeft; - } else { - minLeft = mLeft; - xLoc = 0; - } - invalidate(xLoc, 0, mRight - minLeft, mBottom - mTop); - } - } else { - // Double-invalidation is necessary to capture view's old and new areas - invalidate(true); - } - int oldWidth = mRight - mLeft; - int height = mBottom - mTop; - mLeft = left; - onSizeChanged(mRight - mLeft, height, oldWidth, height); - if (!matrixIsIdentity) { - if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { - // A change in dimension means an auto-centered pivot point changes, too - mTransformationInfo.mMatrixDirty = true; - } - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(true); - } - mBackgroundSizeChanged = true; - invalidateParentIfNeeded(); - } - } - /** - * Right position of this view relative to its parent. - * - * @return The right edge of this view, in pixels. - */ - @ViewDebug.CapturedViewProperty - public final int getRight() { - return mRight; - } - /** - * Sets the right position of this view relative to its parent. This method is meant to be called - * by the layout system and should not generally be called otherwise, because the property - * may be changed at any time by the layout. - * - * @param right The bottom of this view, in pixels. - */ - public final void setRight(int right) { - if (right != mRight) { - updateMatrix(); - final boolean matrixIsIdentity = mTransformationInfo == null - || mTransformationInfo.mMatrixIsIdentity; - if (matrixIsIdentity) { - if (mAttachInfo != null) { - int maxRight; - if (right < mRight) { - maxRight = mRight; - } else { - maxRight = right; - } - invalidate(0, 0, maxRight - mLeft, mBottom - mTop); - } - } else { - // Double-invalidation is necessary to capture view's old and new areas - invalidate(true); - } - int oldWidth = mRight - mLeft; - int height = mBottom - mTop; - mRight = right; - onSizeChanged(mRight - mLeft, height, oldWidth, height); - if (!matrixIsIdentity) { - if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { - // A change in dimension means an auto-centered pivot point changes, too - mTransformationInfo.mMatrixDirty = true; - } - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(true); - } - mBackgroundSizeChanged = true; - invalidateParentIfNeeded(); - } - } - /** - * The visual x position of this view, in pixels. This is equivalent to the - * {@link #setTranslationX(float) translationX} property plus the current - * {@link #getLeft() left} property. - * - * @return The visual x position of this view, in pixels. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getX() { - return mLeft + (mTransformationInfo != null ? mTransformationInfo.mTranslationX : 0); - } - /** - * Sets the visual x position of this view, in pixels. This is equivalent to setting the - * {@link #setTranslationX(float) translationX} property to be the difference between - * the x value passed in and the current {@link #getLeft() left} property. - * - * @param x The visual x position of this view, in pixels. - */ - public void setX(float x) { - setTranslationX(x - mLeft); - } - /** - * The visual y position of this view, in pixels. This is equivalent to the - * {@link #setTranslationY(float) translationY} property plus the current - * {@link #getTop() top} property. - * - * @return The visual y position of this view, in pixels. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getY() { - return mTop + (mTransformationInfo != null ? mTransformationInfo.mTranslationY : 0); - } - /** - * Sets the visual y position of this view, in pixels. This is equivalent to setting the - * {@link #setTranslationY(float) translationY} property to be the difference between - * the y value passed in and the current {@link #getTop() top} property. - * - * @param y The visual y position of this view, in pixels. - */ - public void setY(float y) { - setTranslationY(y - mTop); - } - /** - * The horizontal location of this view relative to its {@link #getLeft() left} position. - * This position is post-layout, in addition to wherever the object's - * layout placed it. - * - * @return The horizontal position of this view relative to its left position, in pixels. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getTranslationX() { - return mTransformationInfo != null ? mTransformationInfo.mTranslationX : 0; - } - /** - * Sets the horizontal location of this view relative to its {@link #getLeft() left} position. - * This effectively positions the object post-layout, in addition to wherever the object's - * layout placed it. - * - * @param translationX The horizontal position of this view relative to its left position, - * in pixels. - * - * @attr ref android.R.styleable#View_translationX - */ - public void setTranslationX(float translationX) { - ensureTransformationInfo(); - final TransformationInfo info = mTransformationInfo; - if (info.mTranslationX != translationX) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mTranslationX = translationX; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * The horizontal location of this view relative to its {@link #getTop() top} position. - * This position is post-layout, in addition to wherever the object's - * layout placed it. - * - * @return The vertical position of this view relative to its top position, - * in pixels. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public float getTranslationY() { - return mTransformationInfo != null ? mTransformationInfo.mTranslationY : 0; - } - /** - * Sets the vertical location of this view relative to its {@link #getTop() top} position. - * This effectively positions the object post-layout, in addition to wherever the object's - * layout placed it. - * - * @param translationY The vertical position of this view relative to its top position, - * in pixels. - * - * @attr ref android.R.styleable#View_translationY - */ - public void setTranslationY(float translationY) { - ensureTransformationInfo(); - final TransformationInfo info = mTransformationInfo; - if (info.mTranslationY != translationY) { - invalidateParentCaches(); - // Double-invalidation is necessary to capture view's old and new areas - invalidate(false); - info.mTranslationY = translationY; - info.mMatrixDirty = true; - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - } - /** - * Hit rectangle in parent's coordinates - * - * @param outRect The hit rectangle of the view. - */ - public void getHitRect(Rect outRect) { - updateMatrix(); - final TransformationInfo info = mTransformationInfo; - if (info == null || info.mMatrixIsIdentity || mAttachInfo == null) { - outRect.set(mLeft, mTop, mRight, mBottom); - } else { - final RectF tmpRect = mAttachInfo.mTmpTransformRect; - tmpRect.set(-info.mPivotX, -info.mPivotY, - getWidth() - info.mPivotX, getHeight() - info.mPivotY); - info.mMatrix.mapRect(tmpRect); - outRect.set((int) tmpRect.left + mLeft, (int) tmpRect.top + mTop, - (int) tmpRect.right + mLeft, (int) tmpRect.bottom + mTop); - } - } - /** - * Determines whether the given point, in local coordinates is inside the view. - */ - /*package*/ final boolean pointInView(float localX, float localY) { - return localX >= 0 && localX < (mRight - mLeft) - && localY >= 0 && localY < (mBottom - mTop); - } - /** - * Utility method to determine whether the given point, in local coordinates, - * is inside the view, where the area of the view is expanded by the slop factor. - * This method is called while processing touch-move events to determine if the event - * is still within the view. - */ - private boolean pointInView(float localX, float localY, float slop) { - return localX >= -slop && localY >= -slop && localX < ((mRight - mLeft) + slop) && - localY < ((mBottom - mTop) + slop); - } - /** - * When a view has focus and the user navigates away from it, the next view is searched for - * starting from the rectangle filled in by this method. - * - * By default, the rectange is the {@link #getDrawingRect(android.graphics.Rect)}) - * of the view. However, if your view maintains some idea of internal selection, - * such as a cursor, or a selected row or column, you should override this method and - * fill in a more specific rectangle. - * - * @param r The rectangle to fill in, in this view's coordinates. - */ - public void getFocusedRect(Rect r) { - getDrawingRect(r); - } - /** - * If some part of this view is not clipped by any of its parents, then - * return that area in r in global (root) coordinates. To convert r to local - * coordinates (without taking possible View rotations into account), offset - * it by -globalOffset (e.g. r.offset(-globalOffset.x, -globalOffset.y)). - * If the view is completely clipped or translated out, return false. - * - * @param r If true is returned, r holds the global coordinates of the - * visible portion of this view. - * @param globalOffset If true is returned, globalOffset holds the dx,dy - * between this view and its root. globalOffet may be null. - * @return true if r is non-empty (i.e. part of the view is visible at the - * root level. - */ - public boolean getGlobalVisibleRect(Rect r, Point globalOffset) { - int width = mRight - mLeft; - int height = mBottom - mTop; - if (width > 0 && height > 0) { - r.set(0, 0, width, height); - if (globalOffset != null) { - globalOffset.set(-mScrollX, -mScrollY); - } - return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset); - } - return false; - } - public final boolean getGlobalVisibleRect(Rect r) { - return getGlobalVisibleRect(r, null); - } - public final boolean getLocalVisibleRect(Rect r) { - Point offset = new Point(); - if (getGlobalVisibleRect(r, offset)) { - r.offset(-offset.x, -offset.y); // make r local - return true; - } - return false; - } - /** - * Offset this view's vertical location by the specified number of pixels. - * - * @param offset the number of pixels to offset the view by - */ - public void offsetTopAndBottom(int offset) { - if (offset != 0) { - updateMatrix(); - final boolean matrixIsIdentity = mTransformationInfo == null - || mTransformationInfo.mMatrixIsIdentity; - if (matrixIsIdentity) { - final ViewParent p = mParent; - if (p != null && mAttachInfo != null) { - final Rect r = mAttachInfo.mTmpInvalRect; - int minTop; - int maxBottom; - int yLoc; - if (offset < 0) { - minTop = mTop + offset; - maxBottom = mBottom; - yLoc = offset; - } else { - minTop = mTop; - maxBottom = mBottom + offset; - yLoc = 0; - } - r.set(0, yLoc, mRight - mLeft, maxBottom - minTop); - p.invalidateChild(this, r); - } - } else { - invalidate(false); - } - mTop += offset; - mBottom += offset; - if (!matrixIsIdentity) { - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - invalidateParentIfNeeded(); - } - } - /** - * Offset this view's horizontal location by the specified amount of pixels. - * - * @param offset the numer of pixels to offset the view by - */ - public void offsetLeftAndRight(int offset) { - if (offset != 0) { - updateMatrix(); - final boolean matrixIsIdentity = mTransformationInfo == null - || mTransformationInfo.mMatrixIsIdentity; - if (matrixIsIdentity) { - final ViewParent p = mParent; - if (p != null && mAttachInfo != null) { - final Rect r = mAttachInfo.mTmpInvalRect; - int minLeft; - int maxRight; - if (offset < 0) { - minLeft = mLeft + offset; - maxRight = mRight; - } else { - minLeft = mLeft; - maxRight = mRight + offset; - } - r.set(0, 0, maxRight - minLeft, mBottom - mTop); - p.invalidateChild(this, r); - } - } else { - invalidate(false); - } - mLeft += offset; - mRight += offset; - if (!matrixIsIdentity) { - mPrivateFlags |= DRAWN; // force another invalidation with the new orientation - invalidate(false); - } - invalidateParentIfNeeded(); - } - } - /** - * Get the LayoutParams associated with this view. All views should have - * layout parameters. These supply parameters to the parent of this - * view specifying how it should be arranged. There are many subclasses of - * ViewGroup.LayoutParams, and these correspond to the different subclasses - * of ViewGroup that are responsible for arranging their children. - * - * This method may return null if this View is not attached to a parent - * ViewGroup or {@link #setLayoutParams(android.view.ViewGroup.LayoutParams)} - * was not invoked successfully. When a View is attached to a parent - * ViewGroup, this method must not return null. - * - * @return The LayoutParams associated with this view, or null if no - * parameters have been set yet - */ - @ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_") - public ViewGroup.LayoutParams getLayoutParams() { - return mLayoutParams; - } - /** - * Set the layout parameters associated with this view. These supply - * parameters to the parent of this view specifying how it should be - * arranged. There are many subclasses of ViewGroup.LayoutParams, and these - * correspond to the different subclasses of ViewGroup that are responsible - * for arranging their children. - * - * @param params The layout parameters for this view, cannot be null - */ - public void setLayoutParams(ViewGroup.LayoutParams params) { - if (params == null) { - throw new NullPointerException("Layout parameters cannot be null"); - } - mLayoutParams = params; - if (mParent instanceof ViewGroup) { - ((ViewGroup) mParent).onSetLayoutParams(this, params); - } - requestLayout(); - } - /** - * Set the scrolled position of your view. This will cause a call to - * {@link #onScrollChanged(int, int, int, int)} and the view will be - * invalidated. - * @param x the x position to scroll to - * @param y the y position to scroll to - */ - public void scrollTo(int x, int y) { - if (mScrollX != x || mScrollY != y) { - int oldX = mScrollX; - int oldY = mScrollY; - mScrollX = x; - mScrollY = y; - invalidateParentCaches(); - onScrollChanged(mScrollX, mScrollY, oldX, oldY); - if (!awakenScrollBars()) { - invalidate(true); - } - } - } - /** - * Move the scrolled position of your view. This will cause a call to - * {@link #onScrollChanged(int, int, int, int)} and the view will be - * invalidated. - * @param x the amount of pixels to scroll by horizontally - * @param y the amount of pixels to scroll by vertically - */ - public void scrollBy(int x, int y) { - scrollTo(mScrollX + x, mScrollY + y); - } - /** - *

Trigger the scrollbars to draw. When invoked this method starts an - * animation to fade the scrollbars out after a default delay. If a subclass - * provides animated scrolling, the start delay should equal the duration - * of the scrolling animation.

- * - *

The animation starts only if at least one of the scrollbars is - * enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and - * {@link #isVerticalScrollBarEnabled()}. When the animation is started, - * this method returns true, and false otherwise. If the animation is - * started, this method calls {@link #invalidate()}; in that case the - * caller should not call {@link #invalidate()}.

- * - *

This method should be invoked every time a subclass directly updates - * the scroll parameters.

- * - *

This method is automatically invoked by {@link #scrollBy(int, int)} - * and {@link #scrollTo(int, int)}.

- * - * @return true if the animation is played, false otherwise - * - * @see #awakenScrollBars(int) - * @see #scrollBy(int, int) - * @see #scrollTo(int, int) - * @see #isHorizontalScrollBarEnabled() - * @see #isVerticalScrollBarEnabled() - * @see #setHorizontalScrollBarEnabled(boolean) - * @see #setVerticalScrollBarEnabled(boolean) - */ - protected boolean awakenScrollBars() { - return mScrollCache != null && - awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true); - } - /** - * Trigger the scrollbars to draw. - * This method differs from awakenScrollBars() only in its default duration. - * initialAwakenScrollBars() will show the scroll bars for longer than - * usual to give the user more of a chance to notice them. - * - * @return true if the animation is played, false otherwise. - */ - private boolean initialAwakenScrollBars() { - return mScrollCache != null && - awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true); - } - /** - *

- * Trigger the scrollbars to draw. When invoked this method starts an - * animation to fade the scrollbars out after a fixed delay. If a subclass - * provides animated scrolling, the start delay should equal the duration of - * the scrolling animation. - *

- * - *

- * The animation starts only if at least one of the scrollbars is enabled, - * as specified by {@link #isHorizontalScrollBarEnabled()} and - * {@link #isVerticalScrollBarEnabled()}. When the animation is started, - * this method returns true, and false otherwise. If the animation is - * started, this method calls {@link #invalidate()}; in that case the caller - * should not call {@link #invalidate()}. - *

- * - *

- * This method should be invoked everytime a subclass directly updates the - * scroll parameters. - *

- * - * @param startDelay the delay, in milliseconds, after which the animation - * should start; when the delay is 0, the animation starts - * immediately - * @return true if the animation is played, false otherwise - * - * @see #scrollBy(int, int) - * @see #scrollTo(int, int) - * @see #isHorizontalScrollBarEnabled() - * @see #isVerticalScrollBarEnabled() - * @see #setHorizontalScrollBarEnabled(boolean) - * @see #setVerticalScrollBarEnabled(boolean) - */ - protected boolean awakenScrollBars(int startDelay) { - return awakenScrollBars(startDelay, true); - } - /** - *

- * Trigger the scrollbars to draw. When invoked this method starts an - * animation to fade the scrollbars out after a fixed delay. If a subclass - * provides animated scrolling, the start delay should equal the duration of - * the scrolling animation. - *

- * - *

- * The animation starts only if at least one of the scrollbars is enabled, - * as specified by {@link #isHorizontalScrollBarEnabled()} and - * {@link #isVerticalScrollBarEnabled()}. When the animation is started, - * this method returns true, and false otherwise. If the animation is - * started, this method calls {@link #invalidate()} if the invalidate parameter - * is set to true; in that case the caller - * should not call {@link #invalidate()}. - *

- * - *

- * This method should be invoked everytime a subclass directly updates the - * scroll parameters. - *

- * - * @param startDelay the delay, in milliseconds, after which the animation - * should start; when the delay is 0, the animation starts - * immediately - * - * @param invalidate Wheter this method should call invalidate - * - * @return true if the animation is played, false otherwise - * - * @see #scrollBy(int, int) - * @see #scrollTo(int, int) - * @see #isHorizontalScrollBarEnabled() - * @see #isVerticalScrollBarEnabled() - * @see #setHorizontalScrollBarEnabled(boolean) - * @see #setVerticalScrollBarEnabled(boolean) - */ - protected boolean awakenScrollBars(int startDelay, boolean invalidate) { - final ScrollabilityCache scrollCache = mScrollCache; - if (scrollCache == null || !scrollCache.fadeScrollBars) { - return false; - } - if (scrollCache.scrollBar == null) { - scrollCache.scrollBar = new ScrollBarDrawable(); - } - if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) { - if (invalidate) { - // Invalidate to show the scrollbars - invalidate(true); - } - if (scrollCache.state == ScrollabilityCache.OFF) { - // FIXME: this is copied from WindowManagerService. - // We should get this value from the system when it - // is possible to do so. - final int KEY_REPEAT_FIRST_DELAY = 750; - startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay); - } - // Tell mScrollCache when we should start fading. This may - // extend the fade start time if one was already scheduled - long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay; - scrollCache.fadeStartTime = fadeStartTime; - scrollCache.state = ScrollabilityCache.ON; - // Schedule our fader to run, unscheduling any old ones first - if (mAttachInfo != null) { - mAttachInfo.mHandler.removeCallbacks(scrollCache); - mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime); - } - return true; - } - return false; - } - /** - * Do not invalidate views which are not visible and which are not running an animation. They - * will not get drawn and they should not set dirty flags as if they will be drawn - */ - private boolean skipInvalidate() { - return (mViewFlags & VISIBILITY_MASK) != VISIBLE && mCurrentAnimation == null && - (!(mParent instanceof ViewGroup) || - !((ViewGroup) mParent).isViewTransitioning(this)); - } - /** - * Mark the area defined by dirty as needing to be drawn. If the view is - * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some point - * in the future. This must be called from a UI thread. To call from a non-UI - * thread, call {@link #postInvalidate()}. - * - * WARNING: This method is destructive to dirty. - * @param dirty the rectangle representing the bounds of the dirty region - */ - public void invalidate(Rect dirty) { - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE); - } - if (skipInvalidate()) { - return; - } - if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS) || - (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID || - (mPrivateFlags & INVALIDATED) != INVALIDATED) { - mPrivateFlags &= ~DRAWING_CACHE_VALID; - mPrivateFlags |= INVALIDATED; - mPrivateFlags |= DIRTY; - final ViewParent p = mParent; - final AttachInfo ai = mAttachInfo; - //noinspection PointlessBooleanExpression,ConstantConditions - if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { - if (p != null && ai != null && ai.mHardwareAccelerated) { - // fast-track for GL-enabled applications; just invalidate the whole hierarchy - // with a null dirty rect, which tells the ViewAncestor to redraw everything - p.invalidateChild(this, null); - return; - } - } - if (p != null && ai != null) { - final int scrollX = mScrollX; - final int scrollY = mScrollY; - final Rect r = ai.mTmpInvalRect; - r.set(dirty.left - scrollX, dirty.top - scrollY, - dirty.right - scrollX, dirty.bottom - scrollY); - mParent.invalidateChild(this, r); - } - } - } - /** - * Mark the area defined by the rect (l,t,r,b) as needing to be drawn. - * The coordinates of the dirty rect are relative to the view. - * If the view is visible, {@link #onDraw(android.graphics.Canvas)} - * will be called at some point in the future. This must be called from - * a UI thread. To call from a non-UI thread, call {@link #postInvalidate()}. - * @param l the left position of the dirty region - * @param t the top position of the dirty region - * @param r the right position of the dirty region - * @param b the bottom position of the dirty region - */ - public void invalidate(int l, int t, int r, int b) { - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE); - } - if (skipInvalidate()) { - return; - } - if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS) || - (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID || - (mPrivateFlags & INVALIDATED) != INVALIDATED) { - mPrivateFlags &= ~DRAWING_CACHE_VALID; - mPrivateFlags |= INVALIDATED; - mPrivateFlags |= DIRTY; - final ViewParent p = mParent; - final AttachInfo ai = mAttachInfo; - //noinspection PointlessBooleanExpression,ConstantConditions - if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { - if (p != null && ai != null && ai.mHardwareAccelerated) { - // fast-track for GL-enabled applications; just invalidate the whole hierarchy - // with a null dirty rect, which tells the ViewAncestor to redraw everything - p.invalidateChild(this, null); - return; - } - } - if (p != null && ai != null && l < r && t < b) { - final int scrollX = mScrollX; - final int scrollY = mScrollY; - final Rect tmpr = ai.mTmpInvalRect; - tmpr.set(l - scrollX, t - scrollY, r - scrollX, b - scrollY); - p.invalidateChild(this, tmpr); - } - } - } - /** - * Invalidate the whole view. If the view is visible, - * {@link #onDraw(android.graphics.Canvas)} will be called at some point in - * the future. This must be called from a UI thread. To call from a non-UI thread, - * call {@link #postInvalidate()}. - */ - public void invalidate() { - invalidate(true); - } - /** - * This is where the invalidate() work actually happens. A full invalidate() - * causes the drawing cache to be invalidated, but this function can be called with - * invalidateCache set to false to skip that invalidation step for cases that do not - * need it (for example, a component that remains at the same dimensions with the same - * content). - * - * @param invalidateCache Whether the drawing cache for this view should be invalidated as - * well. This is usually true for a full invalidate, but may be set to false if the - * View's contents or dimensions have not changed. - */ - void invalidate(boolean invalidateCache) { - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE); - } - if (skipInvalidate()) { - return; - } - if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS) || - (invalidateCache && (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID) || - (mPrivateFlags & INVALIDATED) != INVALIDATED || isOpaque() != mLastIsOpaque) { - mLastIsOpaque = isOpaque(); - mPrivateFlags &= ~DRAWN; - mPrivateFlags |= DIRTY; - if (invalidateCache) { - mPrivateFlags |= INVALIDATED; - mPrivateFlags &= ~DRAWING_CACHE_VALID; - } - final AttachInfo ai = mAttachInfo; - final ViewParent p = mParent; - //noinspection PointlessBooleanExpression,ConstantConditions - if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { - if (p != null && ai != null && ai.mHardwareAccelerated) { - // fast-track for GL-enabled applications; just invalidate the whole hierarchy - // with a null dirty rect, which tells the ViewAncestor to redraw everything - p.invalidateChild(this, null); - return; - } - } - if (p != null && ai != null) { - final Rect r = ai.mTmpInvalRect; - r.set(0, 0, mRight - mLeft, mBottom - mTop); - // Don't call invalidate -- we don't want to internally scroll - // our own bounds - p.invalidateChild(this, r); - } - } - } - /** - * Used to indicate that the parent of this view should clear its caches. This functionality - * is used to force the parent to rebuild its display list (when hardware-accelerated), - * which is necessary when various parent-managed properties of the view change, such as - * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method only - * clears the parent caches and does not causes an invalidate event. - * - * @hide - */ - protected void invalidateParentCaches() { - if (mParent instanceof View) { - ((View) mParent).mPrivateFlags |= INVALIDATED; - } - } - /** - * Used to indicate that the parent of this view should be invalidated. This functionality - * is used to force the parent to rebuild its display list (when hardware-accelerated), - * which is necessary when various parent-managed properties of the view change, such as - * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method will propagate - * an invalidation event to the parent. - * - * @hide - */ - protected void invalidateParentIfNeeded() { - if (isHardwareAccelerated() && mParent instanceof View) { - ((View) mParent).invalidate(true); - } - } - /** - * Indicates whether this View is opaque. An opaque View guarantees that it will - * draw all the pixels overlapping its bounds using a fully opaque color. - * - * Subclasses of View should override this method whenever possible to indicate - * whether an instance is opaque. Opaque Views are treated in a special way by - * the View hierarchy, possibly allowing it to perform optimizations during - * invalidate/draw passes. - * - * @return True if this View is guaranteed to be fully opaque, false otherwise. - */ - @ViewDebug.ExportedProperty(category = "drawing") - public boolean isOpaque() { - return (mPrivateFlags & OPAQUE_MASK) == OPAQUE_MASK && - ((mTransformationInfo != null ? mTransformationInfo.mAlpha : 1) - >= 1.0f - ViewConfiguration.ALPHA_THRESHOLD); - } - /** - * @hide - */ - protected void computeOpaqueFlags() { - // Opaque if: - // - Has a background - // - Background is opaque - // - Doesn't have scrollbars or scrollbars are inside overlay - if (mBGDrawable != null && mBGDrawable.getOpacity() == PixelFormat.OPAQUE) { - mPrivateFlags |= OPAQUE_BACKGROUND; - } else { - mPrivateFlags &= ~OPAQUE_BACKGROUND; - } - final int flags = mViewFlags; - if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) || - (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY) { - mPrivateFlags |= OPAQUE_SCROLLBARS; - } else { - mPrivateFlags &= ~OPAQUE_SCROLLBARS; - } - } - /** - * @hide - */ - protected boolean hasOpaqueScrollbars() { - return (mPrivateFlags & OPAQUE_SCROLLBARS) == OPAQUE_SCROLLBARS; - } - /** - * @return A handler associated with the thread running the View. This - * handler can be used to pump events in the UI events queue. - */ - public Handler getHandler() { - if (mAttachInfo != null) { - return mAttachInfo.mHandler; - } - return null; - } - /** - * Gets the view root associated with the View. - * @return The view root, or null if none. - * @hide - */ - public ViewRootImpl getViewRootImpl() { - if (mAttachInfo != null) { - return mAttachInfo.mViewRootImpl; - } - return null; - } - /** - *

Causes the Runnable to be added to the message queue. - * The runnable will be run on the user interface thread.

- * - *

This method can be invoked from outside of the UI thread - * only when this View is attached to a window.

- * - * @param action The Runnable that will be executed. - * - * @return Returns true if the Runnable was successfully placed in to the - * message queue. Returns false on failure, usually because the - * looper processing the message queue is exiting. - */ - public boolean post(Runnable action) { - final AttachInfo attachInfo = mAttachInfo; - if (attachInfo != null) { - return attachInfo.mHandler.post(action); - } - // Assume that post will succeed later - ViewRootImpl.getRunQueue().post(action); - return true; - } - /** - *

Causes the Runnable to be added to the message queue, to be run - * after the specified amount of time elapses. - * The runnable will be run on the user interface thread.

- * - *

This method can be invoked from outside of the UI thread - * only when this View is attached to a window.

- * - * @param action The Runnable that will be executed. - * @param delayMillis The delay (in milliseconds) until the Runnable - * will be executed. - * - * @return true if the Runnable was successfully placed in to the - * message queue. Returns false on failure, usually because the - * looper processing the message queue is exiting. Note that a - * result of true does not mean the Runnable will be processed -- - * if the looper is quit before the delivery time of the message - * occurs then the message will be dropped. - */ - public boolean postDelayed(Runnable action, long delayMillis) { - final AttachInfo attachInfo = mAttachInfo; - if (attachInfo != null) { - return attachInfo.mHandler.postDelayed(action, delayMillis); - } - // Assume that post will succeed later - ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); - return true; - } - /** - *

Removes the specified Runnable from the message queue.

- * - *

This method can be invoked from outside of the UI thread - * only when this View is attached to a window.

- * - * @param action The Runnable to remove from the message handling queue - * - * @return true if this view could ask the Handler to remove the Runnable, - * false otherwise. When the returned value is true, the Runnable - * may or may not have been actually removed from the message queue - * (for instance, if the Runnable was not in the queue already.) - */ - public boolean removeCallbacks(Runnable action) { - final AttachInfo attachInfo = mAttachInfo; - if (attachInfo != null) { - attachInfo.mHandler.removeCallbacks(action); - } else { - // Assume that post will succeed later - ViewRootImpl.getRunQueue().removeCallbacks(action); - } - return true; - } - /** - *

Cause an invalidate to happen on a subsequent cycle through the event loop. - * Use this to invalidate the View from a non-UI thread.

- * - *

This method can be invoked from outside of the UI thread - * only when this View is attached to a window.

- * - * @see #invalidate() - */ - public void postInvalidate() { - postInvalidateDelayed(0); - } - /** - *

Cause an invalidate of the specified area to happen on a subsequent cycle - * through the event loop. Use this to invalidate the View from a non-UI thread.

- * - *

This method can be invoked from outside of the UI thread - * only when this View is attached to a window.

- * - * @param left The left coordinate of the rectangle to invalidate. - * @param top The top coordinate of the rectangle to invalidate. - * @param right The right coordinate of the rectangle to invalidate. - * @param bottom The bottom coordinate of the rectangle to invalidate. - * - * @see #invalidate(int, int, int, int) - * @see #invalidate(Rect) - */ - public void postInvalidate(int left, int top, int right, int bottom) { - postInvalidateDelayed(0, left, top, right, bottom); - } - /** - *

Cause an invalidate to happen on a subsequent cycle through the event - * loop. Waits for the specified amount of time.

- * - *

This method can be invoked from outside of the UI thread - * only when this View is attached to a window.

- * - * @param delayMilliseconds the duration in milliseconds to delay the - * invalidation by - */ - public void postInvalidateDelayed(long delayMilliseconds) { - // We try only with the AttachInfo because there's no point in invalidating - // if we are not attached to our window - final AttachInfo attachInfo = mAttachInfo; - if (attachInfo != null) { - attachInfo.mViewRootImpl.dispatchInvalidateDelayed(this, delayMilliseconds); - } - } - /** - *

Cause an invalidate of the specified area to happen on a subsequent cycle - * through the event loop. Waits for the specified amount of time.

- * - *

This method can be invoked from outside of the UI thread - * only when this View is attached to a window.

- * - * @param delayMilliseconds the duration in milliseconds to delay the - * invalidation by - * @param left The left coordinate of the rectangle to invalidate. - * @param top The top coordinate of the rectangle to invalidate. - * @param right The right coordinate of the rectangle to invalidate. - * @param bottom The bottom coordinate of the rectangle to invalidate. - */ - public void postInvalidateDelayed(long delayMilliseconds, int left, int top, - int right, int bottom) { - // We try only with the AttachInfo because there's no point in invalidating - // if we are not attached to our window - final AttachInfo attachInfo = mAttachInfo; - if (attachInfo != null) { - final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.acquire(); - info.target = this; - info.left = left; - info.top = top; - info.right = right; - info.bottom = bottom; - attachInfo.mViewRootImpl.dispatchInvalidateRectDelayed(info, delayMilliseconds); - } - } - /** - * Post a callback to send a {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} event. - * This event is sent at most once every - * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. - */ - private void postSendViewScrolledAccessibilityEventCallback() { - if (mSendViewScrolledAccessibilityEvent == null) { - mSendViewScrolledAccessibilityEvent = new SendViewScrolledAccessibilityEvent(); - } - if (!mSendViewScrolledAccessibilityEvent.mIsPending) { - mSendViewScrolledAccessibilityEvent.mIsPending = true; - postDelayed(mSendViewScrolledAccessibilityEvent, - ViewConfiguration.getSendRecurringAccessibilityEventsInterval()); - } - } - /** - * Called by a parent to request that a child update its values for mScrollX - * and mScrollY if necessary. This will typically be done if the child is - * animating a scroll using a {@link android.widget.Scroller Scroller} - * object. - */ - public void computeScroll() { - } - /** - *

Indicate whether the horizontal edges are faded when the view is - * scrolled horizontally.

- * - * @return true if the horizontal edges should are faded on scroll, false - * otherwise - * - * @see #setHorizontalFadingEdgeEnabled(boolean) - * @attr ref android.R.styleable#View_requiresFadingEdge - */ - public boolean isHorizontalFadingEdgeEnabled() { - return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL; - } - /** - *

Define whether the horizontal edges should be faded when this view - * is scrolled horizontally.

- * - * @param horizontalFadingEdgeEnabled true if the horizontal edges should - * be faded when the view is scrolled - * horizontally - * - * @see #isHorizontalFadingEdgeEnabled() - * @attr ref android.R.styleable#View_requiresFadingEdge - */ - public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) { - if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) { - if (horizontalFadingEdgeEnabled) { - initScrollCache(); - } - mViewFlags ^= FADING_EDGE_HORIZONTAL; - } - } - /** - *

Indicate whether the vertical edges are faded when the view is - * scrolled horizontally.

- * - * @return true if the vertical edges should are faded on scroll, false - * otherwise - * - * @see #setVerticalFadingEdgeEnabled(boolean) - * @attr ref android.R.styleable#View_requiresFadingEdge - */ - public boolean isVerticalFadingEdgeEnabled() { - return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL; - } - /** - *

Define whether the vertical edges should be faded when this view - * is scrolled vertically.

- * - * @param verticalFadingEdgeEnabled true if the vertical edges should - * be faded when the view is scrolled - * vertically - * - * @see #isVerticalFadingEdgeEnabled() - * @attr ref android.R.styleable#View_requiresFadingEdge - */ - public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) { - if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) { - if (verticalFadingEdgeEnabled) { - initScrollCache(); - } - mViewFlags ^= FADING_EDGE_VERTICAL; - } - } - /** - * Returns the strength, or intensity, of the top faded edge. The strength is - * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation - * returns 0.0 or 1.0 but no value in between. - * - * Subclasses should override this method to provide a smoother fade transition - * when scrolling occurs. - * - * @return the intensity of the top fade as a float between 0.0f and 1.0f - */ - protected float getTopFadingEdgeStrength() { - return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f; - } - /** - * Returns the strength, or intensity, of the bottom faded edge. The strength is - * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation - * returns 0.0 or 1.0 but no value in between. - * - * Subclasses should override this method to provide a smoother fade transition - * when scrolling occurs. - * - * @return the intensity of the bottom fade as a float between 0.0f and 1.0f - */ - protected float getBottomFadingEdgeStrength() { - return computeVerticalScrollOffset() + computeVerticalScrollExtent() < - computeVerticalScrollRange() ? 1.0f : 0.0f; - } - /** - * Returns the strength, or intensity, of the left faded edge. The strength is - * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation - * returns 0.0 or 1.0 but no value in between. - * - * Subclasses should override this method to provide a smoother fade transition - * when scrolling occurs. - * - * @return the intensity of the left fade as a float between 0.0f and 1.0f - */ - protected float getLeftFadingEdgeStrength() { - return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f; - } - /** - * Returns the strength, or intensity, of the right faded edge. The strength is - * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation - * returns 0.0 or 1.0 but no value in between. - * - * Subclasses should override this method to provide a smoother fade transition - * when scrolling occurs. - * - * @return the intensity of the right fade as a float between 0.0f and 1.0f - */ - protected float getRightFadingEdgeStrength() { - return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() < - computeHorizontalScrollRange() ? 1.0f : 0.0f; - } - /** - *

Indicate whether the horizontal scrollbar should be drawn or not. The - * scrollbar is not drawn by default.

- * - * @return true if the horizontal scrollbar should be painted, false - * otherwise - * - * @see #setHorizontalScrollBarEnabled(boolean) - */ - public boolean isHorizontalScrollBarEnabled() { - return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; - } - /** - *

Define whether the horizontal scrollbar should be drawn or not. The - * scrollbar is not drawn by default.

- * - * @param horizontalScrollBarEnabled true if the horizontal scrollbar should - * be painted - * - * @see #isHorizontalScrollBarEnabled() - */ - public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) { - if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) { - mViewFlags ^= SCROLLBARS_HORIZONTAL; - computeOpaqueFlags(); - resolvePadding(); - } - } - /** - *

Indicate whether the vertical scrollbar should be drawn or not. The - * scrollbar is not drawn by default.

- * - * @return true if the vertical scrollbar should be painted, false - * otherwise - * - * @see #setVerticalScrollBarEnabled(boolean) - */ - public boolean isVerticalScrollBarEnabled() { - return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL; - } - /** - *

Define whether the vertical scrollbar should be drawn or not. The - * scrollbar is not drawn by default.

- * - * @param verticalScrollBarEnabled true if the vertical scrollbar should - * be painted - * - * @see #isVerticalScrollBarEnabled() - */ - public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) { - if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) { - mViewFlags ^= SCROLLBARS_VERTICAL; - computeOpaqueFlags(); - resolvePadding(); - } - } - /** - * @hide - */ - protected void recomputePadding() { - setPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); - } - /** - * Define whether scrollbars will fade when the view is not scrolling. - * - * @param fadeScrollbars wheter to enable fading - * - */ - public void setScrollbarFadingEnabled(boolean fadeScrollbars) { - initScrollCache(); - final ScrollabilityCache scrollabilityCache = mScrollCache; - scrollabilityCache.fadeScrollBars = fadeScrollbars; - if (fadeScrollbars) { - scrollabilityCache.state = ScrollabilityCache.OFF; - } else { - scrollabilityCache.state = ScrollabilityCache.ON; - } - } - /** - * - * Returns true if scrollbars will fade when this view is not scrolling - * - * @return true if scrollbar fading is enabled - */ - public boolean isScrollbarFadingEnabled() { - return mScrollCache != null && mScrollCache.fadeScrollBars; - } - /** - *

Specify the style of the scrollbars. The scrollbars can be overlaid or - * inset. When inset, they add to the padding of the view. And the scrollbars - * can be drawn inside the padding area or on the edge of the view. For example, - * if a view has a background drawable and you want to draw the scrollbars - * inside the padding specified by the drawable, you can use - * SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to - * appear at the edge of the view, ignoring the padding, then you can use - * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.

- * @param style the style of the scrollbars. Should be one of - * SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, - * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. - * @see #SCROLLBARS_INSIDE_OVERLAY - * @see #SCROLLBARS_INSIDE_INSET - * @see #SCROLLBARS_OUTSIDE_OVERLAY - * @see #SCROLLBARS_OUTSIDE_INSET - */ - public void setScrollBarStyle(int style) { - if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) { - mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK); - computeOpaqueFlags(); - resolvePadding(); - } - } - /** - *

Returns the current scrollbar style.

- * @return the current scrollbar style - * @see #SCROLLBARS_INSIDE_OVERLAY - * @see #SCROLLBARS_INSIDE_INSET - * @see #SCROLLBARS_OUTSIDE_OVERLAY - * @see #SCROLLBARS_OUTSIDE_INSET - */ - @ViewDebug.ExportedProperty(mapping = { - @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_OVERLAY, to = "INSIDE_OVERLAY"), - @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_INSET, to = "INSIDE_INSET"), - @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_OVERLAY, to = "OUTSIDE_OVERLAY"), - @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_INSET, to = "OUTSIDE_INSET") - }) - public int getScrollBarStyle() { - return mViewFlags & SCROLLBARS_STYLE_MASK; - } - /** - *

Compute the horizontal range that the horizontal scrollbar - * represents.

- * - *

The range is expressed in arbitrary units that must be the same as the - * units used by {@link #computeHorizontalScrollExtent()} and - * {@link #computeHorizontalScrollOffset()}.

- * - *

The default range is the drawing width of this view.

- * - * @return the total horizontal range represented by the horizontal - * scrollbar - * - * @see #computeHorizontalScrollExtent() - * @see #computeHorizontalScrollOffset() - * @see android.widget.ScrollBarDrawable - */ - protected int computeHorizontalScrollRange() { - return getWidth(); - } - /** - *

Compute the horizontal offset of the horizontal scrollbar's thumb - * within the horizontal range. This value is used to compute the position - * of the thumb within the scrollbar's track.

- * - *

The range is expressed in arbitrary units that must be the same as the - * units used by {@link #computeHorizontalScrollRange()} and - * {@link #computeHorizontalScrollExtent()}.

- * - *

The default offset is the scroll offset of this view.

- * - * @return the horizontal offset of the scrollbar's thumb - * - * @see #computeHorizontalScrollRange() - * @see #computeHorizontalScrollExtent() - * @see android.widget.ScrollBarDrawable - */ - protected int computeHorizontalScrollOffset() { - return mScrollX; - } - /** - *

Compute the horizontal extent of the horizontal scrollbar's thumb - * within the horizontal range. This value is used to compute the length - * of the thumb within the scrollbar's track.

- * - *

The range is expressed in arbitrary units that must be the same as the - * units used by {@link #computeHorizontalScrollRange()} and - * {@link #computeHorizontalScrollOffset()}.

- * - *

The default extent is the drawing width of this view.

- * - * @return the horizontal extent of the scrollbar's thumb - * - * @see #computeHorizontalScrollRange() - * @see #computeHorizontalScrollOffset() - * @see android.widget.ScrollBarDrawable - */ - protected int computeHorizontalScrollExtent() { - return getWidth(); - } - /** - *

Compute the vertical range that the vertical scrollbar represents.

- * - *

The range is expressed in arbitrary units that must be the same as the - * units used by {@link #computeVerticalScrollExtent()} and - * {@link #computeVerticalScrollOffset()}.

- * - * @return the total vertical range represented by the vertical scrollbar - * - *

The default range is the drawing height of this view.

- * - * @see #computeVerticalScrollExtent() - * @see #computeVerticalScrollOffset() - * @see android.widget.ScrollBarDrawable - */ - protected int computeVerticalScrollRange() { - return getHeight(); - } - /** - *

Compute the vertical offset of the vertical scrollbar's thumb - * within the horizontal range. This value is used to compute the position - * of the thumb within the scrollbar's track.

- * - *

The range is expressed in arbitrary units that must be the same as the - * units used by {@link #computeVerticalScrollRange()} and - * {@link #computeVerticalScrollExtent()}.

- * - *

The default offset is the scroll offset of this view.

- * - * @return the vertical offset of the scrollbar's thumb - * - * @see #computeVerticalScrollRange() - * @see #computeVerticalScrollExtent() - * @see android.widget.ScrollBarDrawable - */ - protected int computeVerticalScrollOffset() { - return mScrollY; - } - /** - *

Compute the vertical extent of the horizontal scrollbar's thumb - * within the vertical range. This value is used to compute the length - * of the thumb within the scrollbar's track.

- * - *

The range is expressed in arbitrary units that must be the same as the - * units used by {@link #computeVerticalScrollRange()} and - * {@link #computeVerticalScrollOffset()}.

- * - *

The default extent is the drawing height of this view.

- * - * @return the vertical extent of the scrollbar's thumb - * - * @see #computeVerticalScrollRange() - * @see #computeVerticalScrollOffset() - * @see android.widget.ScrollBarDrawable - */ - protected int computeVerticalScrollExtent() { - return getHeight(); - } - /** - * Check if this view can be scrolled horizontally in a certain direction. - * - * @param direction Negative to check scrolling left, positive to check scrolling right. - * @return true if this view can be scrolled in the specified direction, false otherwise. - */ - public boolean canScrollHorizontally(int direction) { - final int offset = computeHorizontalScrollOffset(); - final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent(); - if (range == 0) return false; - if (direction < 0) { - return offset > 0; - } else { - return offset < range - 1; - } - } - /** - * Check if this view can be scrolled vertically in a certain direction. - * - * @param direction Negative to check scrolling up, positive to check scrolling down. - * @return true if this view can be scrolled in the specified direction, false otherwise. - */ - public boolean canScrollVertically(int direction) { - final int offset = computeVerticalScrollOffset(); - final int range = computeVerticalScrollRange() - computeVerticalScrollExtent(); - if (range == 0) return false; - if (direction < 0) { - return offset > 0; - } else { - return offset < range - 1; - } - } - /** - *

Request the drawing of the horizontal and the vertical scrollbar. The - * scrollbars are painted only if they have been awakened first.

- * - * @param canvas the canvas on which to draw the scrollbars - * - * @see #awakenScrollBars(int) - */ - protected final void onDrawScrollBars(Canvas canvas) { - // scrollbars are drawn only when the animation is running - final ScrollabilityCache cache = mScrollCache; - if (cache != null) { - int state = cache.state; - if (state == ScrollabilityCache.OFF) { - return; - } - boolean invalidate = false; - if (state == ScrollabilityCache.FADING) { - // We're fading -- get our fade interpolation - if (cache.interpolatorValues == null) { - cache.interpolatorValues = new float[1]; - } - float[] values = cache.interpolatorValues; - // Stops the animation if we're done - if (cache.scrollBarInterpolator.timeToValues(values) == - Interpolator.Result.FREEZE_END) { - cache.state = ScrollabilityCache.OFF; - } else { - cache.scrollBar.setAlpha(Math.round(values[0])); - } - // This will make the scroll bars inval themselves after - // drawing. We only want this when we're fading so that - // we prevent excessive redraws - invalidate = true; - } else { - // We're just on -- but we may have been fading before so - // reset alpha - cache.scrollBar.setAlpha(255); - } - final int viewFlags = mViewFlags; - final boolean drawHorizontalScrollBar = - (viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; - final boolean drawVerticalScrollBar = - (viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL - && !isVerticalScrollBarHidden(); - if (drawVerticalScrollBar || drawHorizontalScrollBar) { - final int width = mRight - mLeft; - final int height = mBottom - mTop; - final ScrollBarDrawable scrollBar = cache.scrollBar; - final int scrollX = mScrollX; - final int scrollY = mScrollY; - final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0; - int left, top, right, bottom; - if (drawHorizontalScrollBar) { - int size = scrollBar.getSize(false); - if (size <= 0) { - size = cache.scrollBarSize; - } - scrollBar.setParameters(computeHorizontalScrollRange(), - computeHorizontalScrollOffset(), - computeHorizontalScrollExtent(), false); - final int verticalScrollBarGap = drawVerticalScrollBar ? - getVerticalScrollbarWidth() : 0; - top = scrollY + height - size - (mUserPaddingBottom & inside); - left = scrollX + (mPaddingLeft & inside); - right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap; - bottom = top + size; - onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom); - if (invalidate) { - invalidate(left, top, right, bottom); - } - } - if (drawVerticalScrollBar) { - int size = scrollBar.getSize(true); - if (size <= 0) { - size = cache.scrollBarSize; - } - scrollBar.setParameters(computeVerticalScrollRange(), - computeVerticalScrollOffset(), - computeVerticalScrollExtent(), true); - switch (mVerticalScrollbarPosition) { - default: - case SCROLLBAR_POSITION_DEFAULT: - case SCROLLBAR_POSITION_RIGHT: - left = scrollX + width - size - (mUserPaddingRight & inside); - break; - case SCROLLBAR_POSITION_LEFT: - left = scrollX + (mUserPaddingLeft & inside); - break; - } - top = scrollY + (mPaddingTop & inside); - right = left + size; - bottom = scrollY + height - (mUserPaddingBottom & inside); - onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom); - if (invalidate) { - invalidate(left, top, right, bottom); - } - } - } - } - } - /** - * Override this if the vertical scrollbar needs to be hidden in a subclass, like when - * FastScroller is visible. - * @return whether to temporarily hide the vertical scrollbar - * @hide - */ - protected boolean isVerticalScrollBarHidden() { - return false; - } - /** - *

Draw the horizontal scrollbar if - * {@link #isHorizontalScrollBarEnabled()} returns true.

- * - * @param canvas the canvas on which to draw the scrollbar - * @param scrollBar the scrollbar's drawable - * - * @see #isHorizontalScrollBarEnabled() - * @see #computeHorizontalScrollRange() - * @see #computeHorizontalScrollExtent() - * @see #computeHorizontalScrollOffset() - * @see android.widget.ScrollBarDrawable - * @hide - */ - protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, - int l, int t, int r, int b) { - scrollBar.setBounds(l, t, r, b); - scrollBar.draw(canvas); - } - /** - *

Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()} - * returns true.

- * - * @param canvas the canvas on which to draw the scrollbar - * @param scrollBar the scrollbar's drawable - * - * @see #isVerticalScrollBarEnabled() - * @see #computeVerticalScrollRange() - * @see #computeVerticalScrollExtent() - * @see #computeVerticalScrollOffset() - * @see android.widget.ScrollBarDrawable - * @hide - */ - protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, - int l, int t, int r, int b) { - scrollBar.setBounds(l, t, r, b); - scrollBar.draw(canvas); - } - /** - * Implement this to do your drawing. - * - * @param canvas the canvas on which the background will be drawn - */ - protected void onDraw(Canvas canvas) { - } - /* - * Caller is responsible for calling requestLayout if necessary. - * (This allows addViewInLayout to not request a new layout.) - */ - void assignParent(ViewParent parent) { - if (mParent == null) { - mParent = parent; - } else if (parent == null) { - mParent = null; - } else { - throw new RuntimeException("view " + this + " being added, but" - + " it already has a parent"); - } - } - /** - * This is called when the view is attached to a window. At this point it - * has a Surface and will start drawing. Note that this function is - * guaranteed to be called before {@link #onDraw(android.graphics.Canvas)}, - * however it may be called any time before the first onDraw -- including - * before or after {@link #onMeasure(int, int)}. - * - * @see #onDetachedFromWindow() - */ - protected void onAttachedToWindow() { - if ((mPrivateFlags & REQUEST_TRANSPARENT_REGIONS) != 0) { - mParent.requestTransparentRegion(this); - } - if ((mPrivateFlags & AWAKEN_SCROLL_BARS_ON_ATTACH) != 0) { - initialAwakenScrollBars(); - mPrivateFlags &= ~AWAKEN_SCROLL_BARS_ON_ATTACH; - } - jumpDrawablesToCurrentState(); - // Order is important here: LayoutDirection MUST be resolved before Padding - // and TextDirection - resolveLayoutDirectionIfNeeded(); - resolvePadding(); - resolveTextDirection(); - if (isFocused()) { - InputMethodManager imm = InputMethodManager.peekInstance(); - imm.focusIn(this); - } - } - /** - * Resolve and cache the layout direction. LTR is set initially. This is implicitly supposing - * that the parent directionality can and will be resolved before its children. - */ - private void resolveLayoutDirectionIfNeeded() { - // Do not resolve if it is not needed - if ((mPrivateFlags2 & LAYOUT_DIRECTION_RESOLVED) == LAYOUT_DIRECTION_RESOLVED) return; - // Clear any previous layout direction resolution - mPrivateFlags2 &= ~LAYOUT_DIRECTION_RESOLVED_RTL; - // Reset also TextDirection as a change into LayoutDirection may impact the selected - // TextDirectionHeuristic - resetResolvedTextDirection(); - // Set resolved depending on layout direction - switch (getLayoutDirection()) { - case LAYOUT_DIRECTION_INHERIT: - // We cannot do the resolution if there is no parent - if (mParent == null) return; - // If this is root view, no need to look at parent's layout dir. - if (mParent instanceof ViewGroup) { - ViewGroup viewGroup = ((ViewGroup) mParent); - // Check if the parent view group can resolve - if (! viewGroup.canResolveLayoutDirection()) { - return; - } - if (viewGroup.getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) { - mPrivateFlags2 |= LAYOUT_DIRECTION_RESOLVED_RTL; - } - } - break; - case LAYOUT_DIRECTION_RTL: - mPrivateFlags2 |= LAYOUT_DIRECTION_RESOLVED_RTL; - break; - case LAYOUT_DIRECTION_LOCALE: - if(isLayoutDirectionRtl(Locale.getDefault())) { - mPrivateFlags2 |= LAYOUT_DIRECTION_RESOLVED_RTL; - } - break; - default: - // Nothing to do, LTR by default - } - // Set to resolved - mPrivateFlags2 |= LAYOUT_DIRECTION_RESOLVED; - } - /** - * @hide - */ - protected void resolvePadding() { - // If the user specified the absolute padding (either with android:padding or - // android:paddingLeft/Top/Right/Bottom), use this padding, otherwise - // use the default padding or the padding from the background drawable - // (stored at this point in mPadding*) - switch (getResolvedLayoutDirection()) { - case LAYOUT_DIRECTION_RTL: - // Start user padding override Right user padding. Otherwise, if Right user - // padding is not defined, use the default Right padding. If Right user padding - // is defined, just use it. - if (mUserPaddingStart >= 0) { - mUserPaddingRight = mUserPaddingStart; - } else if (mUserPaddingRight < 0) { - mUserPaddingRight = mPaddingRight; - } - if (mUserPaddingEnd >= 0) { - mUserPaddingLeft = mUserPaddingEnd; - } else if (mUserPaddingLeft < 0) { - mUserPaddingLeft = mPaddingLeft; - } - break; - case LAYOUT_DIRECTION_LTR: - default: - // Start user padding override Left user padding. Otherwise, if Left user - // padding is not defined, use the default left padding. If Left user padding - // is defined, just use it. - if (mUserPaddingStart >= 0) { - mUserPaddingLeft = mUserPaddingStart; - } else if (mUserPaddingLeft < 0) { - mUserPaddingLeft = mPaddingLeft; - } - if (mUserPaddingEnd >= 0) { - mUserPaddingRight = mUserPaddingEnd; - } else if (mUserPaddingRight < 0) { - mUserPaddingRight = mPaddingRight; - } - } - mUserPaddingBottom = (mUserPaddingBottom >= 0) ? mUserPaddingBottom : mPaddingBottom; - recomputePadding(); - } - /** - * Return true if layout direction resolution can be done - * - * @hide - */ - protected boolean canResolveLayoutDirection() { - switch (getLayoutDirection()) { - case LAYOUT_DIRECTION_INHERIT: - return (mParent != null); - default: - return true; - } - } - /** - * Reset the resolved layout direction. - * - * Subclasses need to override this method to clear cached information that depends on the - * resolved layout direction, or to inform child views that inherit their layout direction. - * Overrides must also call the superclass implementation at the start of their implementation. - * - * @hide - */ - protected void resetResolvedLayoutDirection() { - // Reset the current View resolution - mPrivateFlags2 &= ~LAYOUT_DIRECTION_RESOLVED; - } - /** - * Check if a Locale is corresponding to a RTL script. - * - * @param locale Locale to check - * @return true if a Locale is corresponding to a RTL script. - * - * @hide - */ - protected static boolean isLayoutDirectionRtl(Locale locale) { - return (LocaleUtil.TEXT_LAYOUT_DIRECTION_RTL_DO_NOT_USE == - LocaleUtil.getLayoutDirectionFromLocale(locale)); - } - /** - * This is called when the view is detached from a window. At this point it - * no longer has a surface for drawing. - * - * @see #onAttachedToWindow() - */ - protected void onDetachedFromWindow() { - mPrivateFlags &= ~CANCEL_NEXT_UP_EVENT; - removeUnsetPressCallback(); - removeLongPressCallback(); - removePerformClickCallback(); - removeSendViewScrolledAccessibilityEventCallback(); - destroyDrawingCache(); - destroyLayer(); - if (mDisplayList != null) { - mDisplayList.invalidate(); - } - if (mAttachInfo != null) { - mAttachInfo.mViewRootImpl.cancelInvalidate(this); - } - mCurrentAnimation = null; - resetResolvedLayoutDirection(); - resetResolvedTextDirection(); - } - /** - * @return The number of times this view has been attached to a window - */ - protected int getWindowAttachCount() { - return mWindowAttachCount; - } - /** - * Retrieve a unique token identifying the window this view is attached to. - * @return Return the window's token for use in - * {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}. - */ - public IBinder getWindowToken() { - return mAttachInfo != null ? mAttachInfo.mWindowToken : null; - } - /** - * Retrieve a unique token identifying the top-level "real" window of - * the window that this view is attached to. That is, this is like - * {@link #getWindowToken}, except if the window this view in is a panel - * window (attached to another containing window), then the token of - * the containing window is returned instead. - * - * @return Returns the associated window token, either - * {@link #getWindowToken()} or the containing window's token. - */ - public IBinder getApplicationWindowToken() { - AttachInfo ai = mAttachInfo; - if (ai != null) { - IBinder appWindowToken = ai.mPanelParentWindowToken; - if (appWindowToken == null) { - appWindowToken = ai.mWindowToken; - } - return appWindowToken; - } - return null; - } - /** - * Retrieve private session object this view hierarchy is using to - * communicate with the window manager. - * @return the session object to communicate with the window manager - */ - /*package*/ IWindowSession getWindowSession() { - return mAttachInfo != null ? mAttachInfo.mSession : null; - } - /** - * @param info the {@link android.view.View.AttachInfo} to associated with - * this view - */ - void dispatchAttachedToWindow(AttachInfo info, int visibility) { - //System.out.println("Attached! " + this); - mAttachInfo = info; - mWindowAttachCount++; - // We will need to evaluate the drawable state at least once. - mPrivateFlags |= DRAWABLE_STATE_DIRTY; - if (mFloatingTreeObserver != null) { - info.mTreeObserver.merge(mFloatingTreeObserver); - mFloatingTreeObserver = null; - } - if ((mPrivateFlags&SCROLL_CONTAINER) != 0) { - mAttachInfo.mScrollContainers.add(this); - mPrivateFlags |= SCROLL_CONTAINER_ADDED; - } - performCollectViewAttributes(visibility); - onAttachedToWindow(); - ListenerInfo li = mListenerInfo; - final CopyOnWriteArrayList listeners = - li != null ? li.mOnAttachStateChangeListeners : null; - if (listeners != null && listeners.size() > 0) { - // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to - // perform the dispatching. The iterator is a safe guard against listeners that - // could mutate the list by calling the various add/remove methods. This prevents - // the array from being modified while we iterate it. - for (OnAttachStateChangeListener listener : listeners) { - listener.onViewAttachedToWindow(this); - } - } - int vis = info.mWindowVisibility; - if (vis != GONE) { - onWindowVisibilityChanged(vis); - } - if ((mPrivateFlags&DRAWABLE_STATE_DIRTY) != 0) { - // If nobody has evaluated the drawable state yet, then do it now. - refreshDrawableState(); - } - } - void dispatchDetachedFromWindow() { - AttachInfo info = mAttachInfo; - if (info != null) { - int vis = info.mWindowVisibility; - if (vis != GONE) { - onWindowVisibilityChanged(GONE); - } - } - onDetachedFromWindow(); - ListenerInfo li = mListenerInfo; - final CopyOnWriteArrayList listeners = - li != null ? li.mOnAttachStateChangeListeners : null; - if (listeners != null && listeners.size() > 0) { - // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to - // perform the dispatching. The iterator is a safe guard against listeners that - // could mutate the list by calling the various add/remove methods. This prevents - // the array from being modified while we iterate it. - for (OnAttachStateChangeListener listener : listeners) { - listener.onViewDetachedFromWindow(this); - } - } - if ((mPrivateFlags & SCROLL_CONTAINER_ADDED) != 0) { - mAttachInfo.mScrollContainers.remove(this); - mPrivateFlags &= ~SCROLL_CONTAINER_ADDED; - } - mAttachInfo = null; - } - /** - * Store this view hierarchy's frozen state into the given container. - * - * @param container The SparseArray in which to save the view's state. - * - * @see #restoreHierarchyState(android.util.SparseArray) - * @see #dispatchSaveInstanceState(android.util.SparseArray) - * @see #onSaveInstanceState() - */ - public void saveHierarchyState(SparseArray container) { - dispatchSaveInstanceState(container); - } - /** - * Called by {@link #saveHierarchyState(android.util.SparseArray)} to store the state for - * this view and its children. May be overridden to modify how freezing happens to a - * view's children; for example, some views may want to not store state for their children. - * - * @param container The SparseArray in which to save the view's state. - * - * @see #dispatchRestoreInstanceState(android.util.SparseArray) - * @see #saveHierarchyState(android.util.SparseArray) - * @see #onSaveInstanceState() - */ - protected void dispatchSaveInstanceState(SparseArray container) { - if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) { - mPrivateFlags &= ~SAVE_STATE_CALLED; - Parcelable state = onSaveInstanceState(); - if ((mPrivateFlags & SAVE_STATE_CALLED) == 0) { - throw new IllegalStateException( - "Derived class did not call super.onSaveInstanceState()"); - } - if (state != null) { - // Log.i("View", "Freezing #" + Integer.toHexString(mID) - // + ": " + state); - container.put(mID, state); - } - } - } - /** - * Hook allowing a view to generate a representation of its internal state - * that can later be used to create a new instance with that same state. - * This state should only contain information that is not persistent or can - * not be reconstructed later. For example, you will never store your - * current position on screen because that will be computed again when a - * new instance of the view is placed in its view hierarchy. - *

- * Some examples of things you may store here: the current cursor position - * in a text view (but usually not the text itself since that is stored in a - * content provider or other persistent storage), the currently selected - * item in a list view. - * - * @return Returns a Parcelable object containing the view's current dynamic - * state, or null if there is nothing interesting to save. The - * default implementation returns null. - * @see #onRestoreInstanceState(android.os.Parcelable) - * @see #saveHierarchyState(android.util.SparseArray) - * @see #dispatchSaveInstanceState(android.util.SparseArray) - * @see #setSaveEnabled(boolean) - */ - protected Parcelable onSaveInstanceState() { - mPrivateFlags |= SAVE_STATE_CALLED; - return BaseSavedState.EMPTY_STATE; - } - /** - * Restore this view hierarchy's frozen state from the given container. - * - * @param container The SparseArray which holds previously frozen states. - * - * @see #saveHierarchyState(android.util.SparseArray) - * @see #dispatchRestoreInstanceState(android.util.SparseArray) - * @see #onRestoreInstanceState(android.os.Parcelable) - */ - public void restoreHierarchyState(SparseArray container) { - dispatchRestoreInstanceState(container); - } - /** - * Called by {@link #restoreHierarchyState(android.util.SparseArray)} to retrieve the - * state for this view and its children. May be overridden to modify how restoring - * happens to a view's children; for example, some views may want to not store state - * for their children. - * - * @param container The SparseArray which holds previously saved state. - * - * @see #dispatchSaveInstanceState(android.util.SparseArray) - * @see #restoreHierarchyState(android.util.SparseArray) - * @see #onRestoreInstanceState(android.os.Parcelable) - */ - protected void dispatchRestoreInstanceState(SparseArray container) { - if (mID != NO_ID) { - Parcelable state = container.get(mID); - if (state != null) { - // Log.i("View", "Restoreing #" + Integer.toHexString(mID) - // + ": " + state); - mPrivateFlags &= ~SAVE_STATE_CALLED; - onRestoreInstanceState(state); - if ((mPrivateFlags & SAVE_STATE_CALLED) == 0) { - throw new IllegalStateException( - "Derived class did not call super.onRestoreInstanceState()"); - } - } - } - } - /** - * Hook allowing a view to re-apply a representation of its internal state that had previously - * been generated by {@link #onSaveInstanceState}. This function will never be called with a - * null state. - * - * @param state The frozen state that had previously been returned by - * {@link #onSaveInstanceState}. - * - * @see #onSaveInstanceState() - * @see #restoreHierarchyState(android.util.SparseArray) - * @see #dispatchRestoreInstanceState(android.util.SparseArray) - */ - protected void onRestoreInstanceState(Parcelable state) { - mPrivateFlags |= SAVE_STATE_CALLED; - if (state != BaseSavedState.EMPTY_STATE && state != null) { - throw new IllegalArgumentException("Wrong state class, expecting View State but " - + "received " + state.getClass().toString() + " instead. This usually happens " - + "when two views of different type have the same id in the same hierarchy. " - + "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure " - + "other views do not use the same id."); - } - } - /** - *

Return the time at which the drawing of the view hierarchy started.

- * - * @return the drawing start time in milliseconds - */ - public long getDrawingTime() { - return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0; - } - /** - *

Enables or disables the duplication of the parent's state into this view. When - * duplication is enabled, this view gets its drawable state from its parent rather - * than from its own internal properties.

- * - *

Note: in the current implementation, setting this property to true after the - * view was added to a ViewGroup might have no effect at all. This property should - * always be used from XML or set to true before adding this view to a ViewGroup.

- * - *

Note: if this view's parent addStateFromChildren property is enabled and this - * property is enabled, an exception will be thrown.

- * - *

Note: if the child view uses and updates additionnal states which are unknown to the - * parent, these states should not be affected by this method.

- * - * @param enabled True to enable duplication of the parent's drawable state, false - * to disable it. - * - * @see #getDrawableState() - * @see #isDuplicateParentStateEnabled() - */ - public void setDuplicateParentStateEnabled(boolean enabled) { - setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE); - } - /** - *

Indicates whether this duplicates its drawable state from its parent.

- * - * @return True if this view's drawable state is duplicated from the parent, - * false otherwise - * - * @see #getDrawableState() - * @see #setDuplicateParentStateEnabled(boolean) - */ - public boolean isDuplicateParentStateEnabled() { - return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE; - } - /** - *

Specifies the type of layer backing this view. The layer can be - * {@link #LAYER_TYPE_NONE disabled}, {@link #LAYER_TYPE_SOFTWARE software} or - * {@link #LAYER_TYPE_HARDWARE hardware}.

- * - *

A layer is associated with an optional {@link android.graphics.Paint} - * instance that controls how the layer is composed on screen. The following - * properties of the paint are taken into account when composing the layer:

- *
    - *
  • {@link android.graphics.Paint#getAlpha() Translucency (alpha)}
    • - *
  • {@link android.graphics.Paint#getXfermode() Blending mode}
    • - *
  • {@link android.graphics.Paint#getColorFilter() Color filter}
    • - *
- * - *

If this view has an alpha value set to < 1.0 by calling - * {@link #setAlpha(float)}, the alpha value of the layer's paint is replaced by - * this view's alpha value. Calling {@link #setAlpha(float)} is therefore - * equivalent to setting a hardware layer on this view and providing a paint with - * the desired alpha value.

- * - *

Refer to the documentation of {@link #LAYER_TYPE_NONE disabled}, - * {@link #LAYER_TYPE_SOFTWARE software} and {@link #LAYER_TYPE_HARDWARE hardware} - * for more information on when and how to use layers.

- * - * @param layerType The ype of layer to use with this view, must be one of - * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or - * {@link #LAYER_TYPE_HARDWARE} - * @param paint The paint used to compose the layer. This argument is optional - * and can be null. It is ignored when the layer type is - * {@link #LAYER_TYPE_NONE} - * - * @see #getLayerType() - * @see #LAYER_TYPE_NONE - * @see #LAYER_TYPE_SOFTWARE - * @see #LAYER_TYPE_HARDWARE - * @see #setAlpha(float) - * - * @attr ref android.R.styleable#View_layerType - */ - public void setLayerType(int layerType, Paint paint) { - if (layerType < LAYER_TYPE_NONE || layerType > LAYER_TYPE_HARDWARE) { - throw new IllegalArgumentException("Layer type can only be one of: LAYER_TYPE_NONE, " - + "LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE"); - } - if (layerType == mLayerType) { - if (layerType != LAYER_TYPE_NONE && paint != mLayerPaint) { - mLayerPaint = paint == null ? new Paint() : paint; - invalidateParentCaches(); - invalidate(true); - } - return; - } - // Destroy any previous software drawing cache if needed - switch (mLayerType) { - case LAYER_TYPE_HARDWARE: - destroyLayer(); - // fall through - non-accelerated views may use software layer mechanism instead - case LAYER_TYPE_SOFTWARE: - destroyDrawingCache(); - break; - default: - break; - } - mLayerType = layerType; - final boolean layerDisabled = mLayerType == LAYER_TYPE_NONE; - mLayerPaint = layerDisabled ? null : (paint == null ? new Paint() : paint); - mLocalDirtyRect = layerDisabled ? null : new Rect(); - invalidateParentCaches(); - invalidate(true); - } - /** - * Indicates whether this view has a static layer. A view with layer type - * {@link #LAYER_TYPE_NONE} is a static layer. Other types of layers are - * dynamic. - */ - boolean hasStaticLayer() { - return mLayerType == LAYER_TYPE_NONE; - } - /** - * Indicates what type of layer is currently associated with this view. By default - * a view does not have a layer, and the layer type is {@link #LAYER_TYPE_NONE}. - * Refer to the documentation of {@link #setLayerType(int, android.graphics.Paint)} - * for more information on the different types of layers. - * - * @return {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or - * {@link #LAYER_TYPE_HARDWARE} - * - * @see #setLayerType(int, android.graphics.Paint) - * @see #buildLayer() - * @see #LAYER_TYPE_NONE - * @see #LAYER_TYPE_SOFTWARE - * @see #LAYER_TYPE_HARDWARE - */ - public int getLayerType() { - return mLayerType; - } - /** - * Forces this view's layer to be created and this view to be rendered - * into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE}, - * invoking this method will have no effect. - * - * This method can for instance be used to render a view into its layer before - * starting an animation. If this view is complex, rendering into the layer - * before starting the animation will avoid skipping frames. - * - * @throws IllegalStateException If this view is not attached to a window - * - * @see #setLayerType(int, android.graphics.Paint) - */ - public void buildLayer() { - if (mLayerType == LAYER_TYPE_NONE) return; - if (mAttachInfo == null) { - throw new IllegalStateException("This view must be attached to a window first"); - } - switch (mLayerType) { - case LAYER_TYPE_HARDWARE: - if (mAttachInfo.mHardwareRenderer != null && - mAttachInfo.mHardwareRenderer.isEnabled() && - mAttachInfo.mHardwareRenderer.validate()) { - getHardwareLayer(); - } - break; - case LAYER_TYPE_SOFTWARE: - buildDrawingCache(true); - break; - } - } - - // Make sure the HardwareRenderer.validate() was invoked before calling this method - void flushLayer() { - if (mLayerType == LAYER_TYPE_HARDWARE && mHardwareLayer != null) { - mHardwareLayer.flush(); - } - } - /** - *

Returns a hardware layer that can be used to draw this view again - * without executing its draw method.

- * - * @return A HardwareLayer ready to render, or null if an error occurred. - */ - HardwareLayer getHardwareLayer() { - if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null || - !mAttachInfo.mHardwareRenderer.isEnabled()) { - return null; - } - - if (!mAttachInfo.mHardwareRenderer.validate()) return null; - final int width = mRight - mLeft; - final int height = mBottom - mTop; - if (width == 0 || height == 0) { - return null; - } - if ((mPrivateFlags & DRAWING_CACHE_VALID) == 0 || mHardwareLayer == null) { - if (mHardwareLayer == null) { - mHardwareLayer = mAttachInfo.mHardwareRenderer.createHardwareLayer( - width, height, isOpaque()); - mLocalDirtyRect.setEmpty(); - } else if (mHardwareLayer.getWidth() != width || mHardwareLayer.getHeight() != height) { - mHardwareLayer.resize(width, height); - mLocalDirtyRect.setEmpty(); - } - // The layer is not valid if the underlying GPU resources cannot be allocated - if (!mHardwareLayer.isValid()) { - return null; - } - HardwareCanvas currentCanvas = mAttachInfo.mHardwareCanvas; - final HardwareCanvas canvas = mHardwareLayer.start(currentCanvas); - // Make sure all the GPU resources have been properly allocated - if (canvas == null) { - mHardwareLayer.end(currentCanvas); - return null; - } - mAttachInfo.mHardwareCanvas = canvas; - try { - canvas.setViewport(width, height); - canvas.onPreDraw(mLocalDirtyRect); - mLocalDirtyRect.setEmpty(); - final int restoreCount = canvas.save(); - computeScroll(); - canvas.translate(-mScrollX, -mScrollY); - mPrivateFlags |= DRAWN | DRAWING_CACHE_VALID; - // Fast path for layouts with no backgrounds - if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { - mPrivateFlags &= ~DIRTY_MASK; - dispatchDraw(canvas); - } else { - draw(canvas); - } - canvas.restoreToCount(restoreCount); - } finally { - canvas.onPostDraw(); - mHardwareLayer.end(currentCanvas); - mAttachInfo.mHardwareCanvas = currentCanvas; - } - } - return mHardwareLayer; - } - /** - * Destroys this View's hardware layer if possible. - * - * @return True if the layer was destroyed, false otherwise. - * - * @see #setLayerType(int, android.graphics.Paint) - * @see #LAYER_TYPE_HARDWARE - */ - boolean destroyLayer() { - if (mHardwareLayer != null) { - AttachInfo info = mAttachInfo; - if (info != null && info.mHardwareRenderer != null && - info.mHardwareRenderer.isEnabled() && info.mHardwareRenderer.validate()) { - mHardwareLayer.destroy(); - mHardwareLayer = null; - invalidate(true); - invalidateParentCaches(); - } - return true; - } - return false; - } - /** - * Destroys all hardware rendering resources. This method is invoked - * when the system needs to reclaim resources. Upon execution of this - * method, you should free any OpenGL resources created by the view. - * - * Note: you must call - * super.destroyHardwareResources() when overriding - * this method. - * - * @hide - */ - protected void destroyHardwareResources() { - destroyLayer(); - } - /** - *

Enables or disables the drawing cache. When the drawing cache is enabled, the next call - * to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a - * bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when - * the cache is enabled. To benefit from the cache, you must request the drawing cache by - * calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not - * null.

- * - *

Enabling the drawing cache is similar to - * {@link #setLayerType(int, android.graphics.Paint) setting a layer} when hardware - * acceleration is turned off. When hardware acceleration is turned on, enabling the - * drawing cache has no effect on rendering because the system uses a different mechanism - * for acceleration which ignores the flag. If you want to use a Bitmap for the view, even - * when hardware acceleration is enabled, see {@link #setLayerType(int, android.graphics.Paint)} - * for information on how to enable software and hardware layers.

- * - *

This API can be used to manually generate - * a bitmap copy of this view, by setting the flag to true and calling - * {@link #getDrawingCache()}.

- * - * @param enabled true to enable the drawing cache, false otherwise - * - * @see #isDrawingCacheEnabled() - * @see #getDrawingCache() - * @see #buildDrawingCache() - * @see #setLayerType(int, android.graphics.Paint) - */ - public void setDrawingCacheEnabled(boolean enabled) { - mCachingFailed = false; - setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED); - } - /** - *

Indicates whether the drawing cache is enabled for this view.

- * - * @return true if the drawing cache is enabled - * - * @see #setDrawingCacheEnabled(boolean) - * @see #getDrawingCache() - */ - @ViewDebug.ExportedProperty(category = "drawing") - public boolean isDrawingCacheEnabled() { - return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED; - } - /** - * Debugging utility which recursively outputs the dirty state of a view and its - * descendants. - * - * @hide - */ - @SuppressWarnings({"UnusedDeclaration"}) - public void outputDirtyFlags(String indent, boolean clear, int clearMask) { - Log.d("View", indent + this + " DIRTY(" + (mPrivateFlags & View.DIRTY_MASK) + - ") DRAWN(" + (mPrivateFlags & DRAWN) + ")" + " CACHE_VALID(" + - (mPrivateFlags & View.DRAWING_CACHE_VALID) + - ") INVALIDATED(" + (mPrivateFlags & INVALIDATED) + ")"); - if (clear) { - mPrivateFlags &= clearMask; - } - if (this instanceof ViewGroup) { - ViewGroup parent = (ViewGroup) this; - final int count = parent.getChildCount(); - for (int i = 0; i < count; i++) { - final View child = parent.getChildAt(i); - child.outputDirtyFlags(indent + " ", clear, clearMask); - } - } - } - /** - * This method is used by ViewGroup to cause its children to restore or recreate their - * display lists. It is called by getDisplayList() when the parent ViewGroup does not need - * to recreate its own display list, which would happen if it went through the normal - * draw/dispatchDraw mechanisms. - * - * @hide - */ - protected void dispatchGetDisplayList() {} - /** - * A view that is not attached or hardware accelerated cannot create a display list. - * This method checks these conditions and returns the appropriate result. - * - * @return true if view has the ability to create a display list, false otherwise. - * - * @hide - */ - public boolean canHaveDisplayList() { - return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null); - } - /** - * @return The HardwareRenderer associated with that view or null if hardware rendering - * is not supported or this this has not been attached to a window. - * - * @hide - */ - public HardwareRenderer getHardwareRenderer() { - if (mAttachInfo != null) { - return mAttachInfo.mHardwareRenderer; - } - return null; - } - /** - *

Returns a display list that can be used to draw this view again - * without executing its draw method.

- * - * @return A DisplayList ready to replay, or null if caching is not enabled. - * - * @hide - */ - public DisplayList getDisplayList() { - if (!canHaveDisplayList()) { - return null; - } - if (((mPrivateFlags & DRAWING_CACHE_VALID) == 0 || - mDisplayList == null || !mDisplayList.isValid() || - mRecreateDisplayList)) { - // Don't need to recreate the display list, just need to tell our - // children to restore/recreate theirs - if (mDisplayList != null && mDisplayList.isValid() && - !mRecreateDisplayList) { - mPrivateFlags |= DRAWN | DRAWING_CACHE_VALID; - mPrivateFlags &= ~DIRTY_MASK; - dispatchGetDisplayList(); - return mDisplayList; - } - // If we got here, we're recreating it. Mark it as such to ensure that - // we copy in child display lists into ours in drawChild() - mRecreateDisplayList = true; - if (mDisplayList == null) { - final String name = getClass().getSimpleName(); - mDisplayList = mAttachInfo.mHardwareRenderer.createDisplayList(name); - // If we're creating a new display list, make sure our parent gets invalidated - // since they will need to recreate their display list to account for this - // new child display list. - invalidateParentCaches(); - } - final HardwareCanvas canvas = mDisplayList.start(); - int restoreCount = 0; - try { - int width = mRight - mLeft; - int height = mBottom - mTop; - canvas.setViewport(width, height); - // The dirty rect should always be null for a display list - canvas.onPreDraw(null); - computeScroll(); - restoreCount = canvas.save(); - canvas.translate(-mScrollX, -mScrollY); - mPrivateFlags |= DRAWN | DRAWING_CACHE_VALID; - mPrivateFlags &= ~DIRTY_MASK; - // Fast path for layouts with no backgrounds - if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { - dispatchDraw(canvas); - } else { - draw(canvas); - } - } finally { - canvas.restoreToCount(restoreCount); - canvas.onPostDraw(); - mDisplayList.end(); - } - } else { - mPrivateFlags |= DRAWN | DRAWING_CACHE_VALID; - mPrivateFlags &= ~DIRTY_MASK; - } - return mDisplayList; - } - /** - *

Calling this method is equivalent to calling getDrawingCache(false).

- * - * @return A non-scaled bitmap representing this view or null if cache is disabled. - * - * @see #getDrawingCache(boolean) - */ - public Bitmap getDrawingCache() { - return getDrawingCache(false); - } - /** - *

Returns the bitmap in which this view drawing is cached. The returned bitmap - * is null when caching is disabled. If caching is enabled and the cache is not ready, - * this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not - * draw from the cache when the cache is enabled. To benefit from the cache, you must - * request the drawing cache by calling this method and draw it on screen if the - * returned bitmap is not null.

- * - *

Note about auto scaling in compatibility mode: When auto scaling is not enabled, - * this method will create a bitmap of the same size as this view. Because this bitmap - * will be drawn scaled by the parent ViewGroup, the result on screen might show - * scaling artifacts. To avoid such artifacts, you should call this method by setting - * the auto scaling to true. Doing so, however, will generate a bitmap of a different - * size than the view. This implies that your application must be able to handle this - * size.

- * - * @param autoScale Indicates whether the generated bitmap should be scaled based on - * the current density of the screen when the application is in compatibility - * mode. - * - * @return A bitmap representing this view or null if cache is disabled. - * - * @see #setDrawingCacheEnabled(boolean) - * @see #isDrawingCacheEnabled() - * @see #buildDrawingCache(boolean) - * @see #destroyDrawingCache() - */ - public Bitmap getDrawingCache(boolean autoScale) { - if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) { - return null; - } - if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) { - buildDrawingCache(autoScale); - } - return autoScale ? mDrawingCache : mUnscaledDrawingCache; - } - /** - *

Frees the resources used by the drawing cache. If you call - * {@link #buildDrawingCache()} manually without calling - * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you - * should cleanup the cache with this method afterwards.

- * - * @see #setDrawingCacheEnabled(boolean) - * @see #buildDrawingCache() - * @see #getDrawingCache() - */ - public void destroyDrawingCache() { - if (mDrawingCache != null) { - mDrawingCache.recycle(); - mDrawingCache = null; - } - if (mUnscaledDrawingCache != null) { - mUnscaledDrawingCache.recycle(); - mUnscaledDrawingCache = null; - } - } - /** - * Setting a solid background color for the drawing cache's bitmaps will improve - * performance and memory usage. Note, though that this should only be used if this - * view will always be drawn on top of a solid color. - * - * @param color The background color to use for the drawing cache's bitmap - * - * @see #setDrawingCacheEnabled(boolean) - * @see #buildDrawingCache() - * @see #getDrawingCache() - */ - public void setDrawingCacheBackgroundColor(int color) { - if (color != mDrawingCacheBackgroundColor) { - mDrawingCacheBackgroundColor = color; - mPrivateFlags &= ~DRAWING_CACHE_VALID; - } - } - /** - * @see #setDrawingCacheBackgroundColor(int) - * - * @return The background color to used for the drawing cache's bitmap - */ - public int getDrawingCacheBackgroundColor() { - return mDrawingCacheBackgroundColor; - } - /** - *

Calling this method is equivalent to calling buildDrawingCache(false).

- * - * @see #buildDrawingCache(boolean) - */ - public void buildDrawingCache() { - buildDrawingCache(false); - } - /** - *

Forces the drawing cache to be built if the drawing cache is invalid.

- * - *

If you call {@link #buildDrawingCache()} manually without calling - * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you - * should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.

- * - *

Note about auto scaling in compatibility mode: When auto scaling is not enabled, - * this method will create a bitmap of the same size as this view. Because this bitmap - * will be drawn scaled by the parent ViewGroup, the result on screen might show - * scaling artifacts. To avoid such artifacts, you should call this method by setting - * the auto scaling to true. Doing so, however, will generate a bitmap of a different - * size than the view. This implies that your application must be able to handle this - * size.

- * - *

You should avoid calling this method when hardware acceleration is enabled. If - * you do not need the drawing cache bitmap, calling this method will increase memory - * usage and cause the view to be rendered in software once, thus negatively impacting - * performance.

- * - * @see #getDrawingCache() - * @see #destroyDrawingCache() - */ - public void buildDrawingCache(boolean autoScale) { - if ((mPrivateFlags & DRAWING_CACHE_VALID) == 0 || (autoScale ? - mDrawingCache == null : mUnscaledDrawingCache == null)) { - mCachingFailed = false; - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.BUILD_CACHE); - } - int width = mRight - mLeft; - int height = mBottom - mTop; - final AttachInfo attachInfo = mAttachInfo; - final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired; - if (autoScale && scalingRequired) { - width = (int) ((width * attachInfo.mApplicationScale) + 0.5f); - height = (int) ((height * attachInfo.mApplicationScale) + 0.5f); - } - final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor; - final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque(); - final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache; - if (width <= 0 || height <= 0 || - // Projected bitmap size in bytes - (width * height * (opaque && !use32BitCache ? 2 : 4) > - ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize())) { - destroyDrawingCache(); - mCachingFailed = true; - return; - } - boolean clear = true; - Bitmap bitmap = autoScale ? mDrawingCache : mUnscaledDrawingCache; - if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) { - Bitmap.Config quality; - if (!opaque) { - // Never pick ARGB_4444 because it looks awful - // Keep the DRAWING_CACHE_QUALITY_LOW flag just in case - switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) { - case DRAWING_CACHE_QUALITY_AUTO: - quality = Bitmap.Config.ARGB_8888; - break; - case DRAWING_CACHE_QUALITY_LOW: - quality = Bitmap.Config.ARGB_8888; - break; - case DRAWING_CACHE_QUALITY_HIGH: - quality = Bitmap.Config.ARGB_8888; - break; - default: - quality = Bitmap.Config.ARGB_8888; - break; - } - } else { - // Optimization for translucent windows - // If the window is translucent, use a 32 bits bitmap to benefit from memcpy() - quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; - } - // Try to cleanup memory - if (bitmap != null) bitmap.recycle(); - try { - bitmap = Bitmap.createBitmap(width, height, quality); - bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); - if (autoScale) { - mDrawingCache = bitmap; - } else { - mUnscaledDrawingCache = bitmap; - } - if (opaque && use32BitCache) bitmap.setHasAlpha(false); - } catch (OutOfMemoryError e) { - // If there is not enough memory to create the bitmap cache, just - // ignore the issue as bitmap caches are not required to draw the - // view hierarchy - if (autoScale) { - mDrawingCache = null; - } else { - mUnscaledDrawingCache = null; - } - mCachingFailed = true; - return; - } - clear = drawingCacheBackgroundColor != 0; - } - Canvas canvas; - if (attachInfo != null) { - canvas = attachInfo.mCanvas; - if (canvas == null) { - canvas = new Canvas(); - } - canvas.setBitmap(bitmap); - // Temporarily clobber the cached Canvas in case one of our children - // is also using a drawing cache. Without this, the children would - // steal the canvas by attaching their own bitmap to it and bad, bad - // thing would happen (invisible views, corrupted drawings, etc.) - attachInfo.mCanvas = null; - } else { - // This case should hopefully never or seldom happen - canvas = new Canvas(bitmap); - } - if (clear) { - bitmap.eraseColor(drawingCacheBackgroundColor); - } - computeScroll(); - final int restoreCount = canvas.save(); - if (autoScale && scalingRequired) { - final float scale = attachInfo.mApplicationScale; - canvas.scale(scale, scale); - } - canvas.translate(-mScrollX, -mScrollY); - mPrivateFlags |= DRAWN; - if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated || - mLayerType != LAYER_TYPE_NONE) { - mPrivateFlags |= DRAWING_CACHE_VALID; - } - // Fast path for layouts with no backgrounds - if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.DRAW); - } - mPrivateFlags &= ~DIRTY_MASK; - dispatchDraw(canvas); - } else { - draw(canvas); - } - canvas.restoreToCount(restoreCount); - canvas.setBitmap(null); - if (attachInfo != null) { - // Restore the cached Canvas for our siblings - attachInfo.mCanvas = canvas; - } - } - } - /** - * Create a snapshot of the view into a bitmap. We should probably make - * some form of this public, but should think about the API. - */ - Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { - int width = mRight - mLeft; - int height = mBottom - mTop; - final AttachInfo attachInfo = mAttachInfo; - final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f; - width = (int) ((width * scale) + 0.5f); - height = (int) ((height * scale) + 0.5f); - Bitmap bitmap = Bitmap.createBitmap(width > 0 ? width : 1, height > 0 ? height : 1, quality); - if (bitmap == null) { - throw new OutOfMemoryError(); - } - Resources resources = getResources(); - if (resources != null) { - bitmap.setDensity(resources.getDisplayMetrics().densityDpi); - } - Canvas canvas; - if (attachInfo != null) { - canvas = attachInfo.mCanvas; - if (canvas == null) { - canvas = new Canvas(); - } - canvas.setBitmap(bitmap); - // Temporarily clobber the cached Canvas in case one of our children - // is also using a drawing cache. Without this, the children would - // steal the canvas by attaching their own bitmap to it and bad, bad - // things would happen (invisible views, corrupted drawings, etc.) - attachInfo.mCanvas = null; - } else { - // This case should hopefully never or seldom happen - canvas = new Canvas(bitmap); - } - if ((backgroundColor & 0xff000000) != 0) { - bitmap.eraseColor(backgroundColor); - } - computeScroll(); - final int restoreCount = canvas.save(); - canvas.scale(scale, scale); - canvas.translate(-mScrollX, -mScrollY); - // Temporarily remove the dirty mask - int flags = mPrivateFlags; - mPrivateFlags &= ~DIRTY_MASK; - // Fast path for layouts with no backgrounds - if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { - dispatchDraw(canvas); - } else { - draw(canvas); - } - mPrivateFlags = flags; - canvas.restoreToCount(restoreCount); - canvas.setBitmap(null); - if (attachInfo != null) { - // Restore the cached Canvas for our siblings - attachInfo.mCanvas = canvas; - } - return bitmap; - } - /** - * Indicates whether this View is currently in edit mode. A View is usually - * in edit mode when displayed within a developer tool. For instance, if - * this View is being drawn by a visual user interface builder, this method - * should return true. - * - * Subclasses should check the return value of this method to provide - * different behaviors if their normal behavior might interfere with the - * host environment. For instance: the class spawns a thread in its - * constructor, the drawing code relies on device-specific features, etc. - * - * This method is usually checked in the drawing code of custom widgets. - * - * @return True if this View is in edit mode, false otherwise. - */ - public boolean isInEditMode() { - return false; - } - /** - * If the View draws content inside its padding and enables fading edges, - * it needs to support padding offsets. Padding offsets are added to the - * fading edges to extend the length of the fade so that it covers pixels - * drawn inside the padding. - * - * Subclasses of this class should override this method if they need - * to draw content inside the padding. - * - * @return True if padding offset must be applied, false otherwise. - * - * @see #getLeftPaddingOffset() - * @see #getRightPaddingOffset() - * @see #getTopPaddingOffset() - * @see #getBottomPaddingOffset() - * - * @since CURRENT - */ - protected boolean isPaddingOffsetRequired() { - return false; - } - /** - * Amount by which to extend the left fading region. Called only when - * {@link #isPaddingOffsetRequired()} returns true. - * - * @return The left padding offset in pixels. - * - * @see #isPaddingOffsetRequired() - * - * @since CURRENT - */ - protected int getLeftPaddingOffset() { - return 0; - } - /** - * Amount by which to extend the right fading region. Called only when - * {@link #isPaddingOffsetRequired()} returns true. - * - * @return The right padding offset in pixels. - * - * @see #isPaddingOffsetRequired() - * - * @since CURRENT - */ - protected int getRightPaddingOffset() { - return 0; - } - /** - * Amount by which to extend the top fading region. Called only when - * {@link #isPaddingOffsetRequired()} returns true. - * - * @return The top padding offset in pixels. - * - * @see #isPaddingOffsetRequired() - * - * @since CURRENT - */ - protected int getTopPaddingOffset() { - return 0; - } - /** - * Amount by which to extend the bottom fading region. Called only when - * {@link #isPaddingOffsetRequired()} returns true. - * - * @return The bottom padding offset in pixels. - * - * @see #isPaddingOffsetRequired() - * - * @since CURRENT - */ - protected int getBottomPaddingOffset() { - return 0; - } - /** - * @hide - * @param offsetRequired - */ - protected int getFadeTop(boolean offsetRequired) { - int top = mPaddingTop; - if (offsetRequired) top += getTopPaddingOffset(); - return top; - } - - /** - * @hide - * @param offsetRequired - */ - protected int getFadeHeight(boolean offsetRequired) { - int padding = mPaddingTop; - if (offsetRequired) padding += getTopPaddingOffset(); - return mBottom - mTop - mPaddingBottom - padding; - } - - /** - *

Indicates whether this view is attached to an hardware accelerated - * window or not.

- * - *

Even if this method returns true, it does not mean that every call - * to {@link #draw(android.graphics.Canvas)} will be made with an hardware - * accelerated {@link android.graphics.Canvas}. For instance, if this view - * is drawn onto an offscren {@link android.graphics.Bitmap} and its - * window is hardware accelerated, - * {@link android.graphics.Canvas#isHardwareAccelerated()} will likely - * return false, and this method will return true.

- * - * @return True if the view is attached to a window and the window is - * hardware accelerated; false in any other case. - */ - public boolean isHardwareAccelerated() { - return mAttachInfo != null && mAttachInfo.mHardwareAccelerated; - } - /** - * Utility function, called by draw(canvas, parent, drawingTime) to handle the less common - * case of an active Animation being run on the view. - */ - private boolean drawAnimation(ViewGroup parent, long drawingTime, - Animation a, boolean scalingRequired) { - Transformation invalidationTransform; - final int flags = parent.mGroupFlags; - final boolean initialized = a.isInitialized(); - if (!initialized) { - a.initialize(mRight - mLeft, mBottom - mTop, getWidth(), getHeight()); - a.initializeInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop); - onAnimationStart(); - } - boolean more = a.getTransformation(drawingTime, parent.mChildTransformation, 1f); - if (scalingRequired && mAttachInfo.mApplicationScale != 1f) { - if (parent.mInvalidationTransformation == null) { - parent.mInvalidationTransformation = new Transformation(); - } - invalidationTransform = parent.mInvalidationTransformation; - a.getTransformation(drawingTime, invalidationTransform, 1f); - } else { - invalidationTransform = parent.mChildTransformation; - } - if (more) { - if (!a.willChangeBounds()) { - if ((flags & (parent.FLAG_OPTIMIZE_INVALIDATE | parent.FLAG_ANIMATION_DONE)) == - parent.FLAG_OPTIMIZE_INVALIDATE) { - parent.mGroupFlags |= parent.FLAG_INVALIDATE_REQUIRED; - } else if ((flags & parent.FLAG_INVALIDATE_REQUIRED) == 0) { - // The child need to draw an animation, potentially offscreen, so - // make sure we do not cancel invalidate requests - parent.mPrivateFlags |= DRAW_ANIMATION; - parent.invalidate(mLeft, mTop, mRight, mBottom); - } - } else { - if (parent.mInvalidateRegion == null) { - parent.mInvalidateRegion = new RectF(); - } - final RectF region = parent.mInvalidateRegion; - a.getInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop, region, - invalidationTransform); - // The child need to draw an animation, potentially offscreen, so - // make sure we do not cancel invalidate requests - parent.mPrivateFlags |= DRAW_ANIMATION; - final int left = mLeft + (int) region.left; - final int top = mTop + (int) region.top; - parent.invalidate(left, top, left + (int) (region.width() + .5f), - top + (int) (region.height() + .5f)); - } - } - return more; - } - /** - * This method is called by ViewGroup.drawChild() to have each child view draw itself. - * This draw() method is an implementation detail and is not intended to be overridden or - * to be called from anywhere else other than ViewGroup.drawChild(). - */ - boolean draw(Canvas canvas, ViewGroup parent, long drawingTime) { - boolean more = false; - final boolean childHasIdentityMatrix = hasIdentityMatrix(); - final int flags = parent.mGroupFlags; - if ((flags & parent.FLAG_CLEAR_TRANSFORMATION) == parent.FLAG_CLEAR_TRANSFORMATION) { - parent.mChildTransformation.clear(); - parent.mGroupFlags &= ~parent.FLAG_CLEAR_TRANSFORMATION; - } - Transformation transformToApply = null; - boolean concatMatrix = false; - boolean scalingRequired = false; - boolean caching; - int layerType = parent.mDrawLayers ? getLayerType() : LAYER_TYPE_NONE; - final boolean hardwareAccelerated = canvas.isHardwareAccelerated(); - if ((flags & parent.FLAG_CHILDREN_DRAWN_WITH_CACHE) == parent.FLAG_CHILDREN_DRAWN_WITH_CACHE || - (flags & parent.FLAG_ALWAYS_DRAWN_WITH_CACHE) == parent.FLAG_ALWAYS_DRAWN_WITH_CACHE) { - caching = true; - if (mAttachInfo != null) scalingRequired = mAttachInfo.mScalingRequired; - } else { - caching = (layerType != LAYER_TYPE_NONE) || hardwareAccelerated; - } - final Animation a = getAnimation(); - if (a != null) { - more = drawAnimation(parent, drawingTime, a, scalingRequired); - concatMatrix = a.willChangeTransformationMatrix(); - transformToApply = parent.mChildTransformation; - } else if ((flags & parent.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) == - parent.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) { - final boolean hasTransform = - parent.getChildStaticTransformation(this, parent.mChildTransformation); - if (hasTransform) { - final int transformType = parent.mChildTransformation.getTransformationType(); - transformToApply = transformType != Transformation.TYPE_IDENTITY ? - parent.mChildTransformation : null; - concatMatrix = (transformType & Transformation.TYPE_MATRIX) != 0; - } - } - concatMatrix |= !childHasIdentityMatrix; - // Sets the flag as early as possible to allow draw() implementations - // to call invalidate() successfully when doing animations - mPrivateFlags |= DRAWN; - if (!concatMatrix && canvas.quickReject(mLeft, mTop, mRight, mBottom, Canvas.EdgeType.BW) && - (mPrivateFlags & DRAW_ANIMATION) == 0) { - return more; - } - if (hardwareAccelerated) { - // Clear INVALIDATED flag to allow invalidation to occur during rendering, but - // retain the flag's value temporarily in the mRecreateDisplayList flag - mRecreateDisplayList = (mPrivateFlags & INVALIDATED) == INVALIDATED; - mPrivateFlags &= ~INVALIDATED; - } - computeScroll(); - final int sx = mScrollX; - final int sy = mScrollY; - DisplayList displayList = null; - Bitmap cache = null; - boolean hasDisplayList = false; - if (caching) { - if (!hardwareAccelerated) { - if (layerType != LAYER_TYPE_NONE) { - layerType = LAYER_TYPE_SOFTWARE; - buildDrawingCache(true); - } - cache = getDrawingCache(true); - } else { - switch (layerType) { - case LAYER_TYPE_SOFTWARE: - buildDrawingCache(true); - cache = getDrawingCache(true); - break; - case LAYER_TYPE_NONE: - // Delay getting the display list until animation-driven alpha values are - // set up and possibly passed on to the view - hasDisplayList = canHaveDisplayList(); - break; - } - } - } - final boolean hasNoCache = cache == null || hasDisplayList; - final boolean offsetForScroll = cache == null && !hasDisplayList && - layerType != LAYER_TYPE_HARDWARE; - final int restoreTo = canvas.save(); - if (offsetForScroll) { - canvas.translate(mLeft - sx, mTop - sy); - } else { - canvas.translate(mLeft, mTop); - if (scalingRequired) { - // mAttachInfo cannot be null, otherwise scalingRequired == false - final float scale = 1.0f / mAttachInfo.mApplicationScale; - canvas.scale(scale, scale); - } - } - float alpha = getAlpha(); - if (transformToApply != null || alpha < 1.0f || !hasIdentityMatrix()) { - if (transformToApply != null || !childHasIdentityMatrix) { - int transX = 0; - int transY = 0; - if (offsetForScroll) { - transX = -sx; - transY = -sy; - } - if (transformToApply != null) { - if (concatMatrix) { - // Undo the scroll translation, apply the transformation matrix, - // then redo the scroll translate to get the correct result. - canvas.translate(-transX, -transY); - canvas.concat(transformToApply.getMatrix()); - canvas.translate(transX, transY); - parent.mGroupFlags |= parent.FLAG_CLEAR_TRANSFORMATION; - } - float transformAlpha = transformToApply.getAlpha(); - if (transformAlpha < 1.0f) { - alpha *= transformToApply.getAlpha(); - parent.mGroupFlags |= parent.FLAG_CLEAR_TRANSFORMATION; - } - } - if (!childHasIdentityMatrix) { - canvas.translate(-transX, -transY); - canvas.concat(getMatrix()); - canvas.translate(transX, transY); - } - } - if (alpha < 1.0f) { - parent.mGroupFlags |= parent.FLAG_CLEAR_TRANSFORMATION; - if (hasNoCache) { - final int multipliedAlpha = (int) (255 * alpha); - if (!onSetAlpha(multipliedAlpha)) { - int layerFlags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; - if ((flags & parent.FLAG_CLIP_CHILDREN) == parent.FLAG_CLIP_CHILDREN || - layerType != LAYER_TYPE_NONE) { - layerFlags |= Canvas.CLIP_TO_LAYER_SAVE_FLAG; - } - if (layerType == LAYER_TYPE_NONE) { - final int scrollX = hasDisplayList ? 0 : sx; - final int scrollY = hasDisplayList ? 0 : sy; - canvas.saveLayerAlpha(scrollX, scrollY, scrollX + mRight - mLeft, - scrollY + mBottom - mTop, multipliedAlpha, layerFlags); - } - } else { - // Alpha is handled by the child directly, clobber the layer's alpha - mPrivateFlags |= ALPHA_SET; - } - } - } - } else if ((mPrivateFlags & ALPHA_SET) == ALPHA_SET) { - onSetAlpha(255); - mPrivateFlags &= ~ALPHA_SET; - } - if ((flags & parent.FLAG_CLIP_CHILDREN) == parent.FLAG_CLIP_CHILDREN) { - if (offsetForScroll) { - canvas.clipRect(sx, sy, sx + (mRight - mLeft), sy + (mBottom - mTop)); - } else { - if (!scalingRequired || cache == null) { - canvas.clipRect(0, 0, mRight - mLeft, mBottom - mTop); - } else { - canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight()); - } - } - } - if (hasDisplayList) { - displayList = getDisplayList(); - if (!displayList.isValid()) { - // Uncommon, but possible. If a view is removed from the hierarchy during the call - // to getDisplayList(), the display list will be marked invalid and we should not - // try to use it again. - displayList = null; - hasDisplayList = false; - } - } - if (hasNoCache) { - boolean layerRendered = false; - if (layerType == LAYER_TYPE_HARDWARE) { - final HardwareLayer layer = getHardwareLayer(); - if (layer != null && layer.isValid()) { - mLayerPaint.setAlpha((int) (alpha * 255)); - ((HardwareCanvas) canvas).drawHardwareLayer(layer, 0, 0, mLayerPaint); - layerRendered = true; - } else { - final int scrollX = hasDisplayList ? 0 : sx; - final int scrollY = hasDisplayList ? 0 : sy; - canvas.saveLayer(scrollX, scrollY, - scrollX + mRight - mLeft, scrollY + mBottom - mTop, mLayerPaint, - Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG); - } - } - if (!layerRendered) { - if (!hasDisplayList) { - // Fast path for layouts with no backgrounds - if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(parent, ViewDebug.HierarchyTraceType.DRAW); - } - mPrivateFlags &= ~DIRTY_MASK; - dispatchDraw(canvas); - } else { - draw(canvas); - } - } else { - mPrivateFlags &= ~DIRTY_MASK; - ((HardwareCanvas) canvas).drawDisplayList(displayList, - mRight - mLeft, mBottom - mTop, null); - } - } - } else if (cache != null) { - mPrivateFlags &= ~DIRTY_MASK; - Paint cachePaint; - if (layerType == LAYER_TYPE_NONE) { - cachePaint = parent.mCachePaint; - if (cachePaint == null) { - cachePaint = new Paint(); - cachePaint.setDither(false); - parent.mCachePaint = cachePaint; - } - if (alpha < 1.0f) { - cachePaint.setAlpha((int) (alpha * 255)); - parent.mGroupFlags |= parent.FLAG_ALPHA_LOWER_THAN_ONE; - } else if ((flags & parent.FLAG_ALPHA_LOWER_THAN_ONE) == - parent.FLAG_ALPHA_LOWER_THAN_ONE) { - cachePaint.setAlpha(255); - parent.mGroupFlags &= ~parent.FLAG_ALPHA_LOWER_THAN_ONE; - } - } else { - cachePaint = mLayerPaint; - cachePaint.setAlpha((int) (alpha * 255)); - } - canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint); - } - canvas.restoreToCount(restoreTo); - if (a != null && !more) { - if (!hardwareAccelerated && !a.getFillAfter()) { - onSetAlpha(255); - } - parent.finishAnimatingView(this, a); - } - if (more && hardwareAccelerated) { - // invalidation is the trigger to recreate display lists, so if we're using - // display lists to render, force an invalidate to allow the animation to - // continue drawing another frame - parent.invalidate(true); - if (a.hasAlpha() && (mPrivateFlags & ALPHA_SET) == ALPHA_SET) { - // alpha animations should cause the child to recreate its display list - invalidate(true); - } - } - mRecreateDisplayList = false; - return more; - } - /** - * Manually render this view (and all of its children) to the given Canvas. - * The view must have already done a full layout before this function is - * called. When implementing a view, implement - * {@link #onDraw(android.graphics.Canvas)} instead of overriding this method. - * If you do need to override this method, call the superclass version. - * - * @param canvas The Canvas to which the View is rendered. - */ - public void draw(Canvas canvas) { - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.DRAW); - } - final int privateFlags = mPrivateFlags; - final boolean dirtyOpaque = (privateFlags & DIRTY_MASK) == DIRTY_OPAQUE && - (mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState); - mPrivateFlags = (privateFlags & ~DIRTY_MASK) | DRAWN; - /* - * Draw traversal performs several drawing steps which must be executed - * in the appropriate order: - * - * 1. Draw the background - * 2. If necessary, save the canvas' layers to prepare for fading - * 3. Draw view's content - * 4. Draw children - * 5. If necessary, draw the fading edges and restore layers - * 6. Draw decorations (scrollbars for instance) - */ - // Step 1, draw the background, if needed - int saveCount; - if (!dirtyOpaque) { - final Drawable background = mBGDrawable; - if (background != null) { - final int scrollX = mScrollX; - final int scrollY = mScrollY; - if (mBackgroundSizeChanged) { - background.setBounds(0, 0, mRight - mLeft, mBottom - mTop); - mBackgroundSizeChanged = false; - } - if ((scrollX | scrollY) == 0) { - background.draw(canvas); - } else { - canvas.translate(scrollX, scrollY); - background.draw(canvas); - canvas.translate(-scrollX, -scrollY); - } - } - } - // skip step 2 & 5 if possible (common case) - final int viewFlags = mViewFlags; - boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0; - boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0; - if (!verticalEdges && !horizontalEdges) { - // Step 3, draw the content - if (!dirtyOpaque) onDraw(canvas); - // Step 4, draw the children - dispatchDraw(canvas); - // Step 6, draw decorations (scrollbars) - onDrawScrollBars(canvas); - // we're done... - return; - } - /* - * Here we do the full fledged routine... - * (this is an uncommon case where speed matters less, - * this is why we repeat some of the tests that have been - * done above) - */ - boolean drawTop = false; - boolean drawBottom = false; - boolean drawLeft = false; - boolean drawRight = false; - float topFadeStrength = 0.0f; - float bottomFadeStrength = 0.0f; - float leftFadeStrength = 0.0f; - float rightFadeStrength = 0.0f; - // Step 2, save the canvas' layers - int paddingLeft = mPaddingLeft; - final boolean offsetRequired = isPaddingOffsetRequired(); - if (offsetRequired) { - paddingLeft += getLeftPaddingOffset(); - } - int left = mScrollX + paddingLeft; - int right = left + mRight - mLeft - mPaddingRight - paddingLeft; - int top = mScrollY + getFadeTop(offsetRequired); - int bottom = top + getFadeHeight(offsetRequired); - if (offsetRequired) { - right += getRightPaddingOffset(); - bottom += getBottomPaddingOffset(); - } - final ScrollabilityCache scrollabilityCache = mScrollCache; - final float fadeHeight = scrollabilityCache.fadingEdgeLength; - int length = (int) fadeHeight; - // clip the fade length if top and bottom fades overlap - // overlapping fades produce odd-looking artifacts - if (verticalEdges && (top + length > bottom - length)) { - length = (bottom - top) / 2; - } - // also clip horizontal fades if necessary - if (horizontalEdges && (left + length > right - length)) { - length = (right - left) / 2; - } - if (verticalEdges) { - topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength())); - drawTop = topFadeStrength * fadeHeight > 1.0f; - bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength())); - drawBottom = bottomFadeStrength * fadeHeight > 1.0f; - } - if (horizontalEdges) { - leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength())); - drawLeft = leftFadeStrength * fadeHeight > 1.0f; - rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength())); - drawRight = rightFadeStrength * fadeHeight > 1.0f; - } - saveCount = canvas.getSaveCount(); - int solidColor = getSolidColor(); - if (solidColor == 0) { - final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; - if (drawTop) { - canvas.saveLayer(left, top, right, top + length, null, flags); - } - if (drawBottom) { - canvas.saveLayer(left, bottom - length, right, bottom, null, flags); - } - if (drawLeft) { - canvas.saveLayer(left, top, left + length, bottom, null, flags); - } - if (drawRight) { - canvas.saveLayer(right - length, top, right, bottom, null, flags); - } - } else { - scrollabilityCache.setFadeColor(solidColor); - } - // Step 3, draw the content - if (!dirtyOpaque) onDraw(canvas); - // Step 4, draw the children - dispatchDraw(canvas); - // Step 5, draw the fade effect and restore layers - final Paint p = scrollabilityCache.paint; - final Matrix matrix = scrollabilityCache.matrix; - final Shader fade = scrollabilityCache.shader; - if (drawTop) { - matrix.setScale(1, fadeHeight * topFadeStrength); - matrix.postTranslate(left, top); - fade.setLocalMatrix(matrix); - canvas.drawRect(left, top, right, top + length, p); - } - if (drawBottom) { - matrix.setScale(1, fadeHeight * bottomFadeStrength); - matrix.postRotate(180); - matrix.postTranslate(left, bottom); - fade.setLocalMatrix(matrix); - canvas.drawRect(left, bottom - length, right, bottom, p); - } - if (drawLeft) { - matrix.setScale(1, fadeHeight * leftFadeStrength); - matrix.postRotate(-90); - matrix.postTranslate(left, top); - fade.setLocalMatrix(matrix); - canvas.drawRect(left, top, left + length, bottom, p); - } - if (drawRight) { - matrix.setScale(1, fadeHeight * rightFadeStrength); - matrix.postRotate(90); - matrix.postTranslate(right, top); - fade.setLocalMatrix(matrix); - canvas.drawRect(right - length, top, right, bottom, p); - } - canvas.restoreToCount(saveCount); - // Step 6, draw decorations (scrollbars) - onDrawScrollBars(canvas); - } - /** - * Override this if your view is known to always be drawn on top of a solid color background, - * and needs to draw fading edges. Returning a non-zero color enables the view system to - * optimize the drawing of the fading edges. If you do return a non-zero color, the alpha - * should be set to 0xFF. - * - * @see #setVerticalFadingEdgeEnabled(boolean) - * @see #setHorizontalFadingEdgeEnabled(boolean) - * - * @return The known solid color background for this view, or 0 if the color may vary - */ - @ViewDebug.ExportedProperty(category = "drawing") - public int getSolidColor() { - return 0; - } - /** - * Build a human readable string representation of the specified view flags. - * - * @param flags the view flags to convert to a string - * @return a String representing the supplied flags - */ - private static String printFlags(int flags) { - String output = ""; - int numFlags = 0; - if ((flags & FOCUSABLE_MASK) == FOCUSABLE) { - output += "TAKES_FOCUS"; - numFlags++; - } - switch (flags & VISIBILITY_MASK) { - case INVISIBLE: - if (numFlags > 0) { - output += " "; - } - output += "INVISIBLE"; - // USELESS HERE numFlags++; - break; - case GONE: - if (numFlags > 0) { - output += " "; - } - output += "GONE"; - // USELESS HERE numFlags++; - break; - default: - break; - } - return output; - } - /** - * Build a human readable string representation of the specified private - * view flags. - * - * @param privateFlags the private view flags to convert to a string - * @return a String representing the supplied flags - */ - private static String printPrivateFlags(int privateFlags) { - String output = ""; - int numFlags = 0; - if ((privateFlags & WANTS_FOCUS) == WANTS_FOCUS) { - output += "WANTS_FOCUS"; - numFlags++; - } - if ((privateFlags & FOCUSED) == FOCUSED) { - if (numFlags > 0) { - output += " "; - } - output += "FOCUSED"; - numFlags++; - } - if ((privateFlags & SELECTED) == SELECTED) { - if (numFlags > 0) { - output += " "; - } - output += "SELECTED"; - numFlags++; - } - if ((privateFlags & IS_ROOT_NAMESPACE) == IS_ROOT_NAMESPACE) { - if (numFlags > 0) { - output += " "; - } - output += "IS_ROOT_NAMESPACE"; - numFlags++; - } - if ((privateFlags & HAS_BOUNDS) == HAS_BOUNDS) { - if (numFlags > 0) { - output += " "; - } - output += "HAS_BOUNDS"; - numFlags++; - } - if ((privateFlags & DRAWN) == DRAWN) { - if (numFlags > 0) { - output += " "; - } - output += "DRAWN"; - // USELESS HERE numFlags++; - } - return output; - } - /** - *

Indicates whether or not this view's layout will be requested during - * the next hierarchy layout pass.

- * - * @return true if the layout will be forced during next layout pass - */ - public boolean isLayoutRequested() { - return (mPrivateFlags & FORCE_LAYOUT) == FORCE_LAYOUT; - } - /** - * Assign a size and position to a view and all of its - * descendants - * - *

This is the second phase of the layout mechanism. - * (The first is measuring). In this phase, each parent calls - * layout on all of its children to position them. - * This is typically done using the child measurements - * that were stored in the measure pass().

- * - *

Derived classes should not override this method. - * Derived classes with children should override - * onLayout. In that method, they should - * call layout on each of their children.

- * - * @param l Left position, relative to parent - * @param t Top position, relative to parent - * @param r Right position, relative to parent - * @param b Bottom position, relative to parent - */ - @SuppressWarnings({"unchecked"}) - public void layout(int l, int t, int r, int b) { - int oldL = mLeft; - int oldT = mTop; - int oldB = mBottom; - int oldR = mRight; - boolean changed = setFrame(l, t, r, b); - if (changed || (mPrivateFlags & LAYOUT_REQUIRED) == LAYOUT_REQUIRED) { - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.ON_LAYOUT); - } - onLayout(changed, l, t, r, b); - mPrivateFlags &= ~LAYOUT_REQUIRED; - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnLayoutChangeListeners != null) { - ArrayList listenersCopy = - (ArrayList)li.mOnLayoutChangeListeners.clone(); - int numListeners = listenersCopy.size(); - for (int i = 0; i < numListeners; ++i) { - listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB); - } - } - } - mPrivateFlags &= ~FORCE_LAYOUT; - } - /** - * Called from layout when this view should - * assign a size and position to each of its children. - * - * Derived classes with children should override - * this method and call layout on each of - * their children. - * @param changed This is a new size or position for this view - * @param left Left position, relative to parent - * @param top Top position, relative to parent - * @param right Right position, relative to parent - * @param bottom Bottom position, relative to parent - */ - protected void onLayout(boolean changed, int left, int top, int right, int bottom) { - } - /** - * Assign a size and position to this view. - * - * This is called from layout. - * - * @param left Left position, relative to parent - * @param top Top position, relative to parent - * @param right Right position, relative to parent - * @param bottom Bottom position, relative to parent - * @return true if the new size and position are different than the - * previous ones - * {@hide} - */ - protected boolean setFrame(int left, int top, int right, int bottom) { - boolean changed = false; - if (DBG) { - Log.d("View", this + " View.setFrame(" + left + "," + top + "," - + right + "," + bottom + ")"); - } - if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { - changed = true; - // Remember our drawn bit - int drawn = mPrivateFlags & DRAWN; - int oldWidth = mRight - mLeft; - int oldHeight = mBottom - mTop; - int newWidth = right - left; - int newHeight = bottom - top; - boolean sizeChanged = (newWidth != oldWidth) || (newHeight != oldHeight); - // Invalidate our old position - invalidate(sizeChanged); - mLeft = left; - mTop = top; - mRight = right; - mBottom = bottom; - mPrivateFlags |= HAS_BOUNDS; - if (sizeChanged) { - if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { - // A change in dimension means an auto-centered pivot point changes, too - if (mTransformationInfo != null) { - mTransformationInfo.mMatrixDirty = true; - } - } - onSizeChanged(newWidth, newHeight, oldWidth, oldHeight); - } - if ((mViewFlags & VISIBILITY_MASK) == VISIBLE) { - // If we are visible, force the DRAWN bit to on so that - // this invalidate will go through (at least to our parent). - // This is because someone may have invalidated this view - // before this call to setFrame came in, thereby clearing - // the DRAWN bit. - mPrivateFlags |= DRAWN; - invalidate(sizeChanged); - // parent display list may need to be recreated based on a change in the bounds - // of any child - invalidateParentCaches(); - } - // Reset drawn bit to original value (invalidate turns it off) - mPrivateFlags |= drawn; - mBackgroundSizeChanged = true; - } - return changed; - } - /** - * Finalize inflating a view from XML. This is called as the last phase - * of inflation, after all child views have been added. - * - *

Even if the subclass overrides onFinishInflate, they should always be - * sure to call the super method, so that we get called. - */ - protected void onFinishInflate() { - } - /** - * Returns the resources associated with this view. - * - * @return Resources object. - */ - public Resources getResources() { - return mResources; - } - /** - * Invalidates the specified Drawable. - * - * @param drawable the drawable to invalidate - */ - public void invalidateDrawable(Drawable drawable) { - if (verifyDrawable(drawable)) { - final Rect dirty = drawable.getBounds(); - final int scrollX = mScrollX; - final int scrollY = mScrollY; - invalidate(dirty.left + scrollX, dirty.top + scrollY, - dirty.right + scrollX, dirty.bottom + scrollY); - } - } - /** - * Schedules an action on a drawable to occur at a specified time. - * - * @param who the recipient of the action - * @param what the action to run on the drawable - * @param when the time at which the action must occur. Uses the - * {@link SystemClock#uptimeMillis} timebase. - */ - public void scheduleDrawable(Drawable who, Runnable what, long when) { - if (verifyDrawable(who) && what != null) { - if (mAttachInfo != null) { - mAttachInfo.mHandler.postAtTime(what, who, when); - } else { - ViewRootImpl.getRunQueue().postDelayed(what, when - SystemClock.uptimeMillis()); - } - } - } - /** - * Cancels a scheduled action on a drawable. - * - * @param who the recipient of the action - * @param what the action to cancel - */ - public void unscheduleDrawable(Drawable who, Runnable what) { - if (verifyDrawable(who) && what != null) { - if (mAttachInfo != null) { - mAttachInfo.mHandler.removeCallbacks(what, who); - } else { - ViewRootImpl.getRunQueue().removeCallbacks(what); - } - } - } - /** - * Unschedule any events associated with the given Drawable. This can be - * used when selecting a new Drawable into a view, so that the previous - * one is completely unscheduled. - * - * @param who The Drawable to unschedule. - * - * @see #drawableStateChanged - */ - public void unscheduleDrawable(Drawable who) { - if (mAttachInfo != null) { - mAttachInfo.mHandler.removeCallbacksAndMessages(who); - } - } - /** - * Return the layout direction of a given Drawable. - * - * @param who the Drawable to query - * - * @hide - */ - public int getResolvedLayoutDirection(Drawable who) { - return (who == mBGDrawable) ? getResolvedLayoutDirection() : LAYOUT_DIRECTION_DEFAULT; - } - /** - * If your view subclass is displaying its own Drawable objects, it should - * override this function and return true for any Drawable it is - * displaying. This allows animations for those drawables to be - * scheduled. - * - *

Be sure to call through to the super class when overriding this - * function. - * - * @param who The Drawable to verify. Return true if it is one you are - * displaying, else return the result of calling through to the - * super class. - * - * @return boolean If true than the Drawable is being displayed in the - * view; else false and it is not allowed to animate. - * - * @see #unscheduleDrawable(android.graphics.drawable.Drawable) - * @see #drawableStateChanged() - */ - protected boolean verifyDrawable(Drawable who) { - return who == mBGDrawable; - } - /** - * This function is called whenever the state of the view changes in such - * a way that it impacts the state of drawables being shown. - * - *

Be sure to call through to the superclass when overriding this - * function. - * - * @see Drawable#setState(int[]) - */ - protected void drawableStateChanged() { - Drawable d = mBGDrawable; - if (d != null && d.isStateful()) { - d.setState(getDrawableState()); - } - } - /** - * Call this to force a view to update its drawable state. This will cause - * drawableStateChanged to be called on this view. Views that are interested - * in the new state should call getDrawableState. - * - * @see #drawableStateChanged - * @see #getDrawableState - */ - public void refreshDrawableState() { - mPrivateFlags |= DRAWABLE_STATE_DIRTY; - drawableStateChanged(); - ViewParent parent = mParent; - if (parent != null) { - parent.childDrawableStateChanged(this); - } - } - /** - * Return an array of resource IDs of the drawable states representing the - * current state of the view. - * - * @return The current drawable state - * - * @see Drawable#setState(int[]) - * @see #drawableStateChanged() - * @see #onCreateDrawableState(int) - */ - public final int[] getDrawableState() { - if ((mDrawableState != null) && ((mPrivateFlags & DRAWABLE_STATE_DIRTY) == 0)) { - return mDrawableState; - } else { - mDrawableState = onCreateDrawableState(0); - mPrivateFlags &= ~DRAWABLE_STATE_DIRTY; - return mDrawableState; - } - } - /** - * Generate the new {@link android.graphics.drawable.Drawable} state for - * this view. This is called by the view - * system when the cached Drawable state is determined to be invalid. To - * retrieve the current state, you should use {@link #getDrawableState}. - * - * @param extraSpace if non-zero, this is the number of extra entries you - * would like in the returned array in which you can place your own - * states. - * - * @return Returns an array holding the current {@link Drawable} state of - * the view. - * - * @see #mergeDrawableStates(int[], int[]) - */ - protected int[] onCreateDrawableState(int extraSpace) { - if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE && - mParent instanceof View) { - return ((View) mParent).onCreateDrawableState(extraSpace); - } - int[] drawableState; - int privateFlags = mPrivateFlags; - int viewStateIndex = 0; - if ((privateFlags & PRESSED) != 0) viewStateIndex |= VIEW_STATE_PRESSED; - if ((mViewFlags & ENABLED_MASK) == ENABLED) viewStateIndex |= VIEW_STATE_ENABLED; - if (isFocused()) viewStateIndex |= VIEW_STATE_FOCUSED; - if ((privateFlags & SELECTED) != 0) viewStateIndex |= VIEW_STATE_SELECTED; - if (hasWindowFocus()) viewStateIndex |= VIEW_STATE_WINDOW_FOCUSED; - if ((privateFlags & ACTIVATED) != 0) viewStateIndex |= VIEW_STATE_ACTIVATED; - if (mAttachInfo != null && mAttachInfo.mHardwareAccelerationRequested && - HardwareRenderer.isAvailable()) { - // This is set if HW acceleration is requested, even if the current - // process doesn't allow it. This is just to allow app preview - // windows to better match their app. - viewStateIndex |= VIEW_STATE_ACCELERATED; - } - if ((privateFlags & HOVERED) != 0) viewStateIndex |= VIEW_STATE_HOVERED; - final int privateFlags2 = mPrivateFlags2; - if ((privateFlags2 & DRAG_CAN_ACCEPT) != 0) viewStateIndex |= VIEW_STATE_DRAG_CAN_ACCEPT; - if ((privateFlags2 & DRAG_HOVERED) != 0) viewStateIndex |= VIEW_STATE_DRAG_HOVERED; - drawableState = VIEW_STATE_SETS[viewStateIndex]; - //noinspection ConstantIfStatement - if (false) { - Log.i("View", "drawableStateIndex=" + viewStateIndex); - Log.i("View", toString() - + " pressed=" + ((privateFlags & PRESSED) != 0) - + " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED) - + " fo=" + hasFocus() - + " sl=" + ((privateFlags & SELECTED) != 0) - + " wf=" + hasWindowFocus() - + ": " + Arrays.toString(drawableState)); - } - if (extraSpace == 0) { - return drawableState; - } - final int[] fullState; - if (drawableState != null) { - fullState = new int[drawableState.length + extraSpace]; - System.arraycopy(drawableState, 0, fullState, 0, drawableState.length); - } else { - fullState = new int[extraSpace]; - } - return fullState; - } - /** - * Merge your own state values in additionalState into the base - * state values baseState that were returned by - * {@link #onCreateDrawableState(int)}. - * - * @param baseState The base state values returned by - * {@link #onCreateDrawableState(int)}, which will be modified to also hold your - * own additional state values. - * - * @param additionalState The additional state values you would like - * added to baseState; this array is not modified. - * - * @return As a convenience, the baseState array you originally - * passed into the function is returned. - * - * @see #onCreateDrawableState(int) - */ - protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) { - final int N = baseState.length; - int i = N - 1; - while (i >= 0 && baseState[i] == 0) { - i--; - } - System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length); - return baseState; - } - /** - * Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()} - * on all Drawable objects associated with this view. - */ - public void jumpDrawablesToCurrentState() { - if (mBGDrawable != null) { - mBGDrawable.jumpToCurrentState(); - } - } - /** - * Sets the background color for this view. - * @param color the color of the background - */ - @RemotableViewMethod - public void setBackgroundColor(int color) { - if (mBGDrawable instanceof ColorDrawable) { - ((ColorDrawable) mBGDrawable).setColor(color); - } else { - setBackgroundDrawable(new ColorDrawable(color)); - } - } - /** - * Set the background to a given resource. The resource should refer to - * a Drawable object or 0 to remove the background. - * @param resid The identifier of the resource. - * @attr ref android.R.styleable#View_background - */ - @RemotableViewMethod - public void setBackgroundResource(int resid) { - if (resid != 0 && resid == mBackgroundResource) { - return; - } - Drawable d= null; - if (resid != 0) { - d = mResources.getDrawable(resid); - } - setBackgroundDrawable(d); - mBackgroundResource = resid; - } - /** - * Set the background to a given Drawable, or remove the background. If the - * background has padding, this View's padding is set to the background's - * padding. However, when a background is removed, this View's padding isn't - * touched. If setting the padding is desired, please use - * {@link #setPadding(int, int, int, int)}. - * - * @param d The Drawable to use as the background, or null to remove the - * background - */ - public void setBackgroundDrawable(Drawable d) { - if (d == mBGDrawable) { - return; - } - boolean requestLayout = false; - mBackgroundResource = 0; - /* - * Regardless of whether we're setting a new background or not, we want - * to clear the previous drawable. - */ - if (mBGDrawable != null) { - mBGDrawable.setCallback(null); - unscheduleDrawable(mBGDrawable); - } - if (d != null) { - Rect padding = sThreadLocal.get(); - if (padding == null) { - padding = new Rect(); - sThreadLocal.set(padding); - } - if (d.getPadding(padding)) { - switch (d.getResolvedLayoutDirectionSelf()) { - case LAYOUT_DIRECTION_RTL: - setPadding(padding.right, padding.top, padding.left, padding.bottom); - break; - case LAYOUT_DIRECTION_LTR: - default: - setPadding(padding.left, padding.top, padding.right, padding.bottom); - } - } - // Compare the minimum sizes of the old Drawable and the new. If there isn't an old or - // if it has a different minimum size, we should layout again - if (mBGDrawable == null || mBGDrawable.getMinimumHeight() != d.getMinimumHeight() || - mBGDrawable.getMinimumWidth() != d.getMinimumWidth()) { - requestLayout = true; - } - d.setCallback(this); - if (d.isStateful()) { - d.setState(getDrawableState()); - } - d.setVisible(getVisibility() == VISIBLE, false); - mBGDrawable = d; - if ((mPrivateFlags & SKIP_DRAW) != 0) { - mPrivateFlags &= ~SKIP_DRAW; - mPrivateFlags |= ONLY_DRAWS_BACKGROUND; - requestLayout = true; - } - } else { - /* Remove the background */ - mBGDrawable = null; - if ((mPrivateFlags & ONLY_DRAWS_BACKGROUND) != 0) { - /* - * This view ONLY drew the background before and we're removing - * the background, so now it won't draw anything - * (hence we SKIP_DRAW) - */ - mPrivateFlags &= ~ONLY_DRAWS_BACKGROUND; - mPrivateFlags |= SKIP_DRAW; - } - /* - * When the background is set, we try to apply its padding to this - * View. When the background is removed, we don't touch this View's - * padding. This is noted in the Javadocs. Hence, we don't need to - * requestLayout(), the invalidate() below is sufficient. - */ - // The old background's minimum size could have affected this - // View's layout, so let's requestLayout - requestLayout = true; - } - computeOpaqueFlags(); - if (requestLayout) { - requestLayout(); - } - mBackgroundSizeChanged = true; - invalidate(true); - } - /** - * Gets the background drawable - * @return The drawable used as the background for this view, if any. - */ - public Drawable getBackground() { - return mBGDrawable; - } - /** - * Sets the padding. The view may add on the space required to display - * the scrollbars, depending on the style and visibility of the scrollbars. - * So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop}, - * {@link #getPaddingRight} and {@link #getPaddingBottom} may be different - * from the values set in this call. - * - * @attr ref android.R.styleable#View_padding - * @attr ref android.R.styleable#View_paddingBottom - * @attr ref android.R.styleable#View_paddingLeft - * @attr ref android.R.styleable#View_paddingRight - * @attr ref android.R.styleable#View_paddingTop - * @param left the left padding in pixels - * @param top the top padding in pixels - * @param right the right padding in pixels - * @param bottom the bottom padding in pixels - */ - public void setPadding(int left, int top, int right, int bottom) { - boolean changed = false; - mUserPaddingRelative = false; - mUserPaddingLeft = left; - mUserPaddingRight = right; - mUserPaddingBottom = bottom; - final int viewFlags = mViewFlags; - // Common case is there are no scroll bars. - if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) { - if ((viewFlags & SCROLLBARS_VERTICAL) != 0) { - final int offset = (viewFlags & SCROLLBARS_INSET_MASK) == 0 - ? 0 : getVerticalScrollbarWidth(); - switch (mVerticalScrollbarPosition) { - case SCROLLBAR_POSITION_DEFAULT: - if (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) { - left += offset; - } else { - right += offset; - } - break; - case SCROLLBAR_POSITION_RIGHT: - right += offset; - break; - case SCROLLBAR_POSITION_LEFT: - left += offset; - break; - } - } - if ((viewFlags & SCROLLBARS_HORIZONTAL) != 0) { - bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0 - ? 0 : getHorizontalScrollbarHeight(); - } - } - if (mPaddingLeft != left) { - changed = true; - mPaddingLeft = left; - } - if (mPaddingTop != top) { - changed = true; - mPaddingTop = top; - } - if (mPaddingRight != right) { - changed = true; - mPaddingRight = right; - } - if (mPaddingBottom != bottom) { - changed = true; - mPaddingBottom = bottom; - } - if (changed) { - requestLayout(); - } - } - /** - * Sets the relative padding. The view may add on the space required to display - * the scrollbars, depending on the style and visibility of the scrollbars. - * So the values returned from {@link #getPaddingStart}, {@link #getPaddingTop}, - * {@link #getPaddingEnd} and {@link #getPaddingBottom} may be different - * from the values set in this call. - * - * @attr ref android.R.styleable#View_padding - * @attr ref android.R.styleable#View_paddingBottom - * @attr ref android.R.styleable#View_paddingStart - * @attr ref android.R.styleable#View_paddingEnd - * @attr ref android.R.styleable#View_paddingTop - * @param start the start padding in pixels - * @param top the top padding in pixels - * @param end the end padding in pixels - * @param bottom the bottom padding in pixels - * - * @hide - */ - public void setPaddingRelative(int start, int top, int end, int bottom) { - mUserPaddingRelative = true; - mUserPaddingStart = start; - mUserPaddingEnd = end; - switch(getResolvedLayoutDirection()) { - case LAYOUT_DIRECTION_RTL: - setPadding(end, top, start, bottom); - break; - case LAYOUT_DIRECTION_LTR: - default: - setPadding(start, top, end, bottom); - } - } - /** - * Returns the top padding of this view. - * - * @return the top padding in pixels - */ - public int getPaddingTop() { - return mPaddingTop; - } - /** - * Returns the bottom padding of this view. If there are inset and enabled - * scrollbars, this value may include the space required to display the - * scrollbars as well. - * - * @return the bottom padding in pixels - */ - public int getPaddingBottom() { - return mPaddingBottom; - } - /** - * Returns the left padding of this view. If there are inset and enabled - * scrollbars, this value may include the space required to display the - * scrollbars as well. - * - * @return the left padding in pixels - */ - public int getPaddingLeft() { - return mPaddingLeft; - } - /** - * Returns the start padding of this view. If there are inset and enabled - * scrollbars, this value may include the space required to display the - * scrollbars as well. - * - * @return the start padding in pixels - * - * @hide - */ - public int getPaddingStart() { - return (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ? - mPaddingRight : mPaddingLeft; - } - /** - * Returns the right padding of this view. If there are inset and enabled - * scrollbars, this value may include the space required to display the - * scrollbars as well. - * - * @return the right padding in pixels - */ - public int getPaddingRight() { - return mPaddingRight; - } - /** - * Returns the end padding of this view. If there are inset and enabled - * scrollbars, this value may include the space required to display the - * scrollbars as well. - * - * @return the end padding in pixels - * - * @hide - */ - public int getPaddingEnd() { - return (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ? - mPaddingLeft : mPaddingRight; - } - /** - * Return if the padding as been set thru relative values - * {@link #setPaddingRelative(int, int, int, int)} or thru - * @attr ref android.R.styleable#View_paddingStart or - * @attr ref android.R.styleable#View_paddingEnd - * - * @return true if the padding is relative or false if it is not. - * - * @hide - */ - public boolean isPaddingRelative() { - return mUserPaddingRelative; - } - /** - * Changes the selection state of this view. A view can be selected or not. - * Note that selection is not the same as focus. Views are typically - * selected in the context of an AdapterView like ListView or GridView; - * the selected view is the view that is highlighted. - * - * @param selected true if the view must be selected, false otherwise - */ - public void setSelected(boolean selected) { - if (((mPrivateFlags & SELECTED) != 0) != selected) { - mPrivateFlags = (mPrivateFlags & ~SELECTED) | (selected ? SELECTED : 0); - if (!selected) resetPressedState(); - invalidate(true); - refreshDrawableState(); - dispatchSetSelected(selected); - } - } - /** - * Dispatch setSelected to all of this View's children. - * - * @see #setSelected(boolean) - * - * @param selected The new selected state - */ - protected void dispatchSetSelected(boolean selected) { - } - /** - * Indicates the selection state of this view. - * - * @return true if the view is selected, false otherwise - */ - @ViewDebug.ExportedProperty - public boolean isSelected() { - return (mPrivateFlags & SELECTED) != 0; - } - /** - * Changes the activated state of this view. A view can be activated or not. - * Note that activation is not the same as selection. Selection is - * a transient property, representing the view (hierarchy) the user is - * currently interacting with. Activation is a longer-term state that the - * user can move views in and out of. For example, in a list view with - * single or multiple selection enabled, the views in the current selection - * set are activated. (Um, yeah, we are deeply sorry about the terminology - * here.) The activated state is propagated down to children of the view it - * is set on. - * - * @param activated true if the view must be activated, false otherwise - */ - public void setActivated(boolean activated) { - if (((mPrivateFlags & ACTIVATED) != 0) != activated) { - mPrivateFlags = (mPrivateFlags & ~ACTIVATED) | (activated ? ACTIVATED : 0); - invalidate(true); - refreshDrawableState(); - dispatchSetActivated(activated); - } - } - /** - * Dispatch setActivated to all of this View's children. - * - * @see #setActivated(boolean) - * - * @param activated The new activated state - */ - protected void dispatchSetActivated(boolean activated) { - } - /** - * Indicates the activation state of this view. - * - * @return true if the view is activated, false otherwise - */ - @ViewDebug.ExportedProperty - public boolean isActivated() { - return (mPrivateFlags & ACTIVATED) != 0; - } - /** - * Returns the ViewTreeObserver for this view's hierarchy. The view tree - * observer can be used to get notifications when global events, like - * layout, happen. - * - * The returned ViewTreeObserver observer is not guaranteed to remain - * valid for the lifetime of this View. If the caller of this method keeps - * a long-lived reference to ViewTreeObserver, it should always check for - * the return value of {@link ViewTreeObserver#isAlive()}. - * - * @return The ViewTreeObserver for this view's hierarchy. - */ - public ViewTreeObserver getViewTreeObserver() { - if (mAttachInfo != null) { - return mAttachInfo.mTreeObserver; - } - if (mFloatingTreeObserver == null) { - mFloatingTreeObserver = new ViewTreeObserver(); - } - return mFloatingTreeObserver; - } - /** - *

Finds the topmost view in the current view hierarchy.

- * - * @return the topmost view containing this view - */ - public View getRootView() { - if (mAttachInfo != null) { - final View v = mAttachInfo.mRootView; - if (v != null) { - return v; - } - } - View parent = this; - while (parent.mParent != null && parent.mParent instanceof View) { - parent = (View) parent.mParent; - } - return parent; - } - /** - *

Computes the coordinates of this view on the screen. The argument - * must be an array of two integers. After the method returns, the array - * contains the x and y location in that order.

- * - * @param location an array of two integers in which to hold the coordinates - */ - public void getLocationOnScreen(int[] location) { - getLocationInWindow(location); - final AttachInfo info = mAttachInfo; - if (info != null) { - location[0] += info.mWindowLeft; - location[1] += info.mWindowTop; - } - } - /** - *

Computes the coordinates of this view in its window. The argument - * must be an array of two integers. After the method returns, the array - * contains the x and y location in that order.

- * - * @param location an array of two integers in which to hold the coordinates - */ - public void getLocationInWindow(int[] location) { - if (location == null || location.length < 2) { - throw new IllegalArgumentException("location must be an array of two integers"); - } - if (mAttachInfo == null) { - // When the view is not attached to a window, this method does not make sense - location[0] = location[1] = 0; - return; - } - float[] position = mAttachInfo.mTmpTransformLocation; - position[0] = position[1] = 0.0f; - if (!hasIdentityMatrix()) { - getMatrix().mapPoints(position); - } - position[0] += mLeft; - position[1] += mTop; - ViewParent viewParent = mParent; - while (viewParent instanceof View) { - final View view = (View) viewParent; - position[0] -= view.mScrollX; - position[1] -= view.mScrollY; - if (!view.hasIdentityMatrix()) { - view.getMatrix().mapPoints(position); - } - position[0] += view.mLeft; - position[1] += view.mTop; - viewParent = view.mParent; - } - if (viewParent instanceof ViewRootImpl) { - // *cough* - final ViewRootImpl vr = (ViewRootImpl) viewParent; - position[1] -= vr.mCurScrollY; - } - location[0] = (int) (position[0] + 0.5f); - location[1] = (int) (position[1] + 0.5f); - } - /** - * {@hide} - * @param id the id of the view to be found - * @return the view of the specified id, null if cannot be found - */ - protected View findViewTraversal(int id) { - if (id == mID) { - return this; - } - return null; - } - /** - * {@hide} - * @param tag the tag of the view to be found - * @return the view of specified tag, null if cannot be found - */ - protected View findViewWithTagTraversal(Object tag) { - if (tag != null && tag.equals(mTag)) { - return this; - } - return null; - } - /** - * {@hide} - * @param predicate The predicate to evaluate. - * @param childToSkip If not null, ignores this child during the recursive traversal. - * @return The first view that matches the predicate or null. - */ - protected View findViewByPredicateTraversal(Predicate predicate, View childToSkip) { - if (predicate.apply(this)) { - return this; - } - return null; - } - /** - * Look for a child view with the given id. If this view has the given - * id, return this view. - * - * @param id The id to search for. - * @return The view that has the given id in the hierarchy or null - */ - public final View findViewById(int id) { - if (id < 0) { - return null; - } - return findViewTraversal(id); - } - /** - * Finds a view by its unuque and stable accessibility id. - * - * @param accessibilityId The searched accessibility id. - * @return The found view. - */ - final View findViewByAccessibilityId(int accessibilityId) { - if (accessibilityId < 0) { - return null; - } - return findViewByAccessibilityIdTraversal(accessibilityId); - } - /** - * Performs the traversal to find a view by its unuque and stable accessibility id. - * - * Note:This method does not stop at the root namespace - * boundary since the user can touch the screen at an arbitrary location - * potentially crossing the root namespace bounday which will send an - * accessibility event to accessibility services and they should be able - * to obtain the event source. Also accessibility ids are guaranteed to be - * unique in the window. - * - * @param accessibilityId The accessibility id. - * @return The found view. - */ - View findViewByAccessibilityIdTraversal(int accessibilityId) { - if (getAccessibilityViewId() == accessibilityId) { - return this; - } - return null; - } - /** - * Look for a child view with the given tag. If this view has the given - * tag, return this view. - * - * @param tag The tag to search for, using "tag.equals(getTag())". - * @return The View that has the given tag in the hierarchy or null - */ - public final View findViewWithTag(Object tag) { - if (tag == null) { - return null; - } - return findViewWithTagTraversal(tag); - } - /** - * {@hide} - * Look for a child view that matches the specified predicate. - * If this view matches the predicate, return this view. - * - * @param predicate The predicate to evaluate. - * @return The first view that matches the predicate or null. - */ - public final View findViewByPredicate(Predicate predicate) { - return findViewByPredicateTraversal(predicate, null); - } - /** - * {@hide} - * Look for a child view that matches the specified predicate, - * starting with the specified view and its descendents and then - * recusively searching the ancestors and siblings of that view - * until this view is reached. - * - * This method is useful in cases where the predicate does not match - * a single unique view (perhaps multiple views use the same id) - * and we are trying to find the view that is "closest" in scope to the - * starting view. - * - * @param start The view to start from. - * @param predicate The predicate to evaluate. - * @return The first view that matches the predicate or null. - */ - public final View findViewByPredicateInsideOut(View start, Predicate predicate) { - View childToSkip = null; - for (;;) { - View view = start.findViewByPredicateTraversal(predicate, childToSkip); - if (view != null || start == this) { - return view; - } - ViewParent parent = start.getParent(); - if (parent == null || !(parent instanceof View)) { - return null; - } - childToSkip = start; - start = (View) parent; - } - } - /** - * Sets the identifier for this view. The identifier does not have to be - * unique in this view's hierarchy. The identifier should be a positive - * number. - * - * @see #NO_ID - * @see #getId() - * @see #findViewById(int) - * - * @param id a number used to identify the view - * - * @attr ref android.R.styleable#View_id - */ - public void setId(int id) { - mID = id; - } - /** - * {@hide} - * - * @param isRoot true if the view belongs to the root namespace, false - * otherwise - */ - public void setIsRootNamespace(boolean isRoot) { - if (isRoot) { - mPrivateFlags |= IS_ROOT_NAMESPACE; - } else { - mPrivateFlags &= ~IS_ROOT_NAMESPACE; - } - } - /** - * {@hide} - * - * @return true if the view belongs to the root namespace, false otherwise - */ - public boolean isRootNamespace() { - return (mPrivateFlags&IS_ROOT_NAMESPACE) != 0; - } - /** - * Returns this view's identifier. - * - * @return a positive integer used to identify the view or {@link #NO_ID} - * if the view has no ID - * - * @see #setId(int) - * @see #findViewById(int) - * @attr ref android.R.styleable#View_id - */ - @ViewDebug.CapturedViewProperty - public int getId() { - return mID; - } - /** - * Returns this view's tag. - * - * @return the Object stored in this view as a tag - * - * @see #setTag(Object) - * @see #getTag(int) - */ - @ViewDebug.ExportedProperty - public Object getTag() { - return mTag; - } - /** - * Sets the tag associated with this view. A tag can be used to mark - * a view in its hierarchy and does not have to be unique within the - * hierarchy. Tags can also be used to store data within a view without - * resorting to another data structure. - * - * @param tag an Object to tag the view with - * - * @see #getTag() - * @see #setTag(int, Object) - */ - public void setTag(final Object tag) { - mTag = tag; - } - /** - * Returns the tag associated with this view and the specified key. - * - * @param key The key identifying the tag - * - * @return the Object stored in this view as a tag - * - * @see #setTag(int, Object) - * @see #getTag() - */ - public Object getTag(int key) { - if (mKeyedTags != null) return mKeyedTags.get(key); - return null; - } - /** - * Sets a tag associated with this view and a key. A tag can be used - * to mark a view in its hierarchy and does not have to be unique within - * the hierarchy. Tags can also be used to store data within a view - * without resorting to another data structure. - * - * The specified key should be an id declared in the resources of the - * application to ensure it is unique (see the ID resource type). - * Keys identified as belonging to - * the Android framework or not associated with any package will cause - * an {@link IllegalArgumentException} to be thrown. - * - * @param key The key identifying the tag - * @param tag An Object to tag the view with - * - * @throws IllegalArgumentException If they specified key is not valid - * - * @see #setTag(Object) - * @see #getTag(int) - */ - public void setTag(int key, final Object tag) { - // If the package id is 0x00 or 0x01, it's either an undefined package - // or a framework id - if ((key >>> 24) < 2) { - throw new IllegalArgumentException("The key must be an application-specific " - + "resource id."); - } - setKeyedTag(key, tag); - } - /** - * Variation of {@link #setTag(int, Object)} that enforces the key to be a - * framework id. - * - * @hide - */ - public void setTagInternal(int key, Object tag) { - if ((key >>> 24) != 0x1) { - throw new IllegalArgumentException("The key must be a framework-specific " - + "resource id."); - } - setKeyedTag(key, tag); - } - private void setKeyedTag(int key, Object tag) { - if (mKeyedTags == null) { - mKeyedTags = new SparseArray(); - } - mKeyedTags.put(key, tag); - } - /** - * @param consistency The type of consistency. See ViewDebug for more information. - * - * @hide - */ - protected boolean dispatchConsistencyCheck(int consistency) { - return onConsistencyCheck(consistency); - } - /** - * Method that subclasses should implement to check their consistency. The type of - * consistency check is indicated by the bit field passed as a parameter. - * - * @param consistency The type of consistency. See ViewDebug for more information. - * - * @throws IllegalStateException if the view is in an inconsistent state. - * - * @hide - */ - protected boolean onConsistencyCheck(int consistency) { - boolean result = true; - final boolean checkLayout = (consistency & ViewDebug.CONSISTENCY_LAYOUT) != 0; - final boolean checkDrawing = (consistency & ViewDebug.CONSISTENCY_DRAWING) != 0; - if (checkLayout) { - if (getParent() == null) { - result = false; - android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG, - "View " + this + " does not have a parent."); - } - if (mAttachInfo == null) { - result = false; - android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG, - "View " + this + " is not attached to a window."); - } - } - if (checkDrawing) { - // Do not check the DIRTY/DRAWN flags because views can call invalidate() - // from their draw() method - if ((mPrivateFlags & DRAWN) != DRAWN && - (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID) { - result = false; - android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG, - "View " + this + " was invalidated but its drawing cache is valid."); - } - } - return result; - } - /** - * Prints information about this view in the log output, with the tag - * {@link #VIEW_LOG_TAG}. - * - * @hide - */ - public void debug() { - debug(0); - } - /** - * Prints information about this view in the log output, with the tag - * {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an - * indentation defined by the depth. - * - * @param depth the indentation level - * - * @hide - */ - protected void debug(int depth) { - String output = debugIndent(depth - 1); - output += "+ " + this; - int id = getId(); - if (id != -1) { - output += " (id=" + id + ")"; - } - Object tag = getTag(); - if (tag != null) { - output += " (tag=" + tag + ")"; - } - Log.d(VIEW_LOG_TAG, output); - if ((mPrivateFlags & FOCUSED) != 0) { - output = debugIndent(depth) + " FOCUSED"; - Log.d(VIEW_LOG_TAG, output); - } - output = debugIndent(depth); - output += "frame={" + mLeft + ", " + mTop + ", " + mRight - + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY - + "} "; - Log.d(VIEW_LOG_TAG, output); - if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0 - || mPaddingBottom != 0) { - output = debugIndent(depth); - output += "padding={" + mPaddingLeft + ", " + mPaddingTop - + ", " + mPaddingRight + ", " + mPaddingBottom + "}"; - Log.d(VIEW_LOG_TAG, output); - } - output = debugIndent(depth); - output += "mMeasureWidth=" + mMeasuredWidth + - " mMeasureHeight=" + mMeasuredHeight; - Log.d(VIEW_LOG_TAG, output); - output = debugIndent(depth); - if (mLayoutParams == null) { - output += "BAD! no layout params"; - } else { - output = mLayoutParams.debug(output); - } - Log.d(VIEW_LOG_TAG, output); - output = debugIndent(depth); - output += "flags={"; - output += View.printFlags(mViewFlags); - output += "}"; - Log.d(VIEW_LOG_TAG, output); - output = debugIndent(depth); - output += "privateFlags={"; - output += View.printPrivateFlags(mPrivateFlags); - output += "}"; - Log.d(VIEW_LOG_TAG, output); - } - /** - * Creates an string of whitespaces used for indentation. - * - * @param depth the indentation level - * @return a String containing (depth * 2 + 3) * 2 white spaces - * - * @hide - */ - protected static String debugIndent(int depth) { - StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2); - for (int i = 0; i < (depth * 2) + 3; i++) { - spaces.append(' ').append(' '); - } - return spaces.toString(); - } - /** - *

Return the offset of the widget's text baseline from the widget's top - * boundary. If this widget does not support baseline alignment, this - * method returns -1.

- * - * @return the offset of the baseline within the widget's bounds or -1 - * if baseline alignment is not supported - */ - @ViewDebug.ExportedProperty(category = "layout") - public int getBaseline() { - return -1; - } - /** - * Call this when something has changed which has invalidated the - * layout of this view. This will schedule a layout pass of the view - * tree. - */ - public void requestLayout() { - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.REQUEST_LAYOUT); - } - if (getAccessibilityNodeProvider() != null) { - throw new IllegalStateException("Views with AccessibilityNodeProvider" - + " can't have children."); - } - mPrivateFlags |= FORCE_LAYOUT; - mPrivateFlags |= INVALIDATED; - if (mParent != null) { - if (mLayoutParams != null) { - mLayoutParams.resolveWithDirection(getResolvedLayoutDirection()); - } - if (!mParent.isLayoutRequested()) { - mParent.requestLayout(); - } - } - } - /** - * Forces this view to be laid out during the next layout pass. - * This method does not call requestLayout() or forceLayout() - * on the parent. - */ - public void forceLayout() { - mPrivateFlags |= FORCE_LAYOUT; - mPrivateFlags |= INVALIDATED; - } - /** - *

- * This is called to find out how big a view should be. The parent - * supplies constraint information in the width and height parameters. - *

- * - *

- * The actual measurement work of a view is performed in - * {@link #onMeasure(int, int)}, called by this method. Therefore, only - * {@link #onMeasure(int, int)} can and must be overridden by subclasses. - *

- * - * - * @param widthMeasureSpec Horizontal space requirements as imposed by the - * parent - * @param heightMeasureSpec Vertical space requirements as imposed by the - * parent - * - * @see #onMeasure(int, int) - */ - public final void measure(int widthMeasureSpec, int heightMeasureSpec) { - if ((mPrivateFlags & FORCE_LAYOUT) == FORCE_LAYOUT || - widthMeasureSpec != mOldWidthMeasureSpec || - heightMeasureSpec != mOldHeightMeasureSpec) { - // first clears the measured dimension flag - mPrivateFlags &= ~MEASURED_DIMENSION_SET; - if (ViewDebug.TRACE_HIERARCHY) { - ViewDebug.trace(this, ViewDebug.HierarchyTraceType.ON_MEASURE); - } - // measure ourselves, this should set the measured dimension flag back - onMeasure(widthMeasureSpec, heightMeasureSpec); - // flag not set, setMeasuredDimension() was not invoked, we raise - // an exception to warn the developer - if ((mPrivateFlags & MEASURED_DIMENSION_SET) != MEASURED_DIMENSION_SET) { - throw new IllegalStateException("onMeasure() did not set the" - + " measured dimension by calling" - + " setMeasuredDimension()"); - } - mPrivateFlags |= LAYOUT_REQUIRED; - } - mOldWidthMeasureSpec = widthMeasureSpec; - mOldHeightMeasureSpec = heightMeasureSpec; - } - /** - *

- * Measure the view and its content to determine the measured width and the - * measured height. This method is invoked by {@link #measure(int, int)} and - * should be overriden by subclasses to provide accurate and efficient - * measurement of their contents. - *

- * - *

- * CONTRACT: When overriding this method, you - * must call {@link #setMeasuredDimension(int, int)} to store the - * measured width and height of this view. Failure to do so will trigger an - * IllegalStateException, thrown by - * {@link #measure(int, int)}. Calling the superclass' - * {@link #onMeasure(int, int)} is a valid use. - *

- * - *

- * The base class implementation of measure defaults to the background size, - * unless a larger size is allowed by the MeasureSpec. Subclasses should - * override {@link #onMeasure(int, int)} to provide better measurements of - * their content. - *

- * - *

- * If this method is overridden, it is the subclass's responsibility to make - * sure the measured height and width are at least the view's minimum height - * and width ({@link #getSuggestedMinimumHeight()} and - * {@link #getSuggestedMinimumWidth()}). - *

- * - * @param widthMeasureSpec horizontal space requirements as imposed by the parent. - * The requirements are encoded with - * {@link android.view.View.MeasureSpec}. - * @param heightMeasureSpec vertical space requirements as imposed by the parent. - * The requirements are encoded with - * {@link android.view.View.MeasureSpec}. - * - * @see #getMeasuredWidth() - * @see #getMeasuredHeight() - * @see #setMeasuredDimension(int, int) - * @see #getSuggestedMinimumHeight() - * @see #getSuggestedMinimumWidth() - * @see android.view.View.MeasureSpec#getMode(int) - * @see android.view.View.MeasureSpec#getSize(int) - */ - protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { - setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), - getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec)); - } - /** - *

This mehod must be called by {@link #onMeasure(int, int)} to store the - * measured width and measured height. Failing to do so will trigger an - * exception at measurement time.

- * - * @param measuredWidth The measured width of this view. May be a complex - * bit mask as defined by {@link #MEASURED_SIZE_MASK} and - * {@link #MEASURED_STATE_TOO_SMALL}. - * @param measuredHeight The measured height of this view. May be a complex - * bit mask as defined by {@link #MEASURED_SIZE_MASK} and - * {@link #MEASURED_STATE_TOO_SMALL}. - */ - protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) { - mMeasuredWidth = measuredWidth; - mMeasuredHeight = measuredHeight; - mPrivateFlags |= MEASURED_DIMENSION_SET; - } - /** - * Merge two states as returned by {@link #getMeasuredState()}. - * @param curState The current state as returned from a view or the result - * of combining multiple views. - * @param newState The new view state to combine. - * @return Returns a new integer reflecting the combination of the two - * states. - */ - public static int combineMeasuredStates(int curState, int newState) { - return curState | newState; - } - /** - * Version of {@link #resolveSizeAndState(int, int, int)} - * returning only the {@link #MEASURED_SIZE_MASK} bits of the result. - */ - public static int resolveSize(int size, int measureSpec) { - return resolveSizeAndState(size, measureSpec, 0) & MEASURED_SIZE_MASK; - } - /** - * Utility to reconcile a desired size and state, with constraints imposed - * by a MeasureSpec. Will take the desired size, unless a different size - * is imposed by the constraints. The returned value is a compound integer, - * with the resolved size in the {@link #MEASURED_SIZE_MASK} bits and - * optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the resulting - * size is smaller than the size the view wants to be. - * - * @param size How big the view wants to be - * @param measureSpec Constraints imposed by the parent - * @return Size information bit mask as defined by - * {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. - */ - public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) { - int result = size; - int specMode = MeasureSpec.getMode(measureSpec); - int specSize = MeasureSpec.getSize(measureSpec); - switch (specMode) { - case MeasureSpec.UNSPECIFIED: - result = size; - break; - case MeasureSpec.AT_MOST: - if (specSize < size) { - result = specSize | MEASURED_STATE_TOO_SMALL; - } else { - result = size; - } - break; - case MeasureSpec.EXACTLY: - result = specSize; - break; - } - return result | (childMeasuredState&MEASURED_STATE_MASK); - } - /** - * Utility to return a default size. Uses the supplied size if the - * MeasureSpec imposed no constraints. Will get larger if allowed - * by the MeasureSpec. - * - * @param size Default size for this view - * @param measureSpec Constraints imposed by the parent - * @return The size this view should be. - */ - public static int getDefaultSize(int size, int measureSpec) { - int result = size; - int specMode = MeasureSpec.getMode(measureSpec); - int specSize = MeasureSpec.getSize(measureSpec); - switch (specMode) { - case MeasureSpec.UNSPECIFIED: - result = size; - break; - case MeasureSpec.AT_MOST: - case MeasureSpec.EXACTLY: - result = specSize; - break; - } - return result; - } - /** - * Returns the suggested minimum height that the view should use. This - * returns the maximum of the view's minimum height - * and the background's minimum height - * ({@link android.graphics.drawable.Drawable#getMinimumHeight()}). - *

- * When being used in {@link #onMeasure(int, int)}, the caller should still - * ensure the returned height is within the requirements of the parent. - * - * @return The suggested minimum height of the view. - */ - protected int getSuggestedMinimumHeight() { - int suggestedMinHeight = mMinHeight; - if (mBGDrawable != null) { - final int bgMinHeight = mBGDrawable.getMinimumHeight(); - if (suggestedMinHeight < bgMinHeight) { - suggestedMinHeight = bgMinHeight; - } - } - return suggestedMinHeight; - } - /** - * Returns the suggested minimum width that the view should use. This - * returns the maximum of the view's minimum width) - * and the background's minimum width - * ({@link android.graphics.drawable.Drawable#getMinimumWidth()}). - *

- * When being used in {@link #onMeasure(int, int)}, the caller should still - * ensure the returned width is within the requirements of the parent. - * - * @return The suggested minimum width of the view. - */ - protected int getSuggestedMinimumWidth() { - int suggestedMinWidth = mMinWidth; - if (mBGDrawable != null) { - final int bgMinWidth = mBGDrawable.getMinimumWidth(); - if (suggestedMinWidth < bgMinWidth) { - suggestedMinWidth = bgMinWidth; - } - } - return suggestedMinWidth; - } - /** - * Sets the minimum height of the view. It is not guaranteed the view will - * be able to achieve this minimum height (for example, if its parent layout - * constrains it with less available height). - * - * @param minHeight The minimum height the view will try to be. - */ - public void setMinimumHeight(int minHeight) { - mMinHeight = minHeight; - } - /** - * Sets the minimum width of the view. It is not guaranteed the view will - * be able to achieve this minimum width (for example, if its parent layout - * constrains it with less available width). - * - * @param minWidth The minimum width the view will try to be. - */ - public void setMinimumWidth(int minWidth) { - mMinWidth = minWidth; - } - /** - * Get the animation currently associated with this view. - * - * @return The animation that is currently playing or - * scheduled to play for this view. - */ - public Animation getAnimation() { - return mCurrentAnimation; - } - /** - * Start the specified animation now. - * - * @param animation the animation to start now - */ - public void startAnimation(Animation animation) { - animation.setStartTime(Animation.START_ON_FIRST_FRAME); - setAnimation(animation); - invalidateParentCaches(); - invalidate(true); - } - /** - * Cancels any animations for this view. - */ - public void clearAnimation() { - if (mCurrentAnimation != null) { - mCurrentAnimation.detach(); - } - mCurrentAnimation = null; - invalidateParentIfNeeded(); - } - /** - * Sets the next animation to play for this view. - * If you want the animation to play immediately, use - * startAnimation. This method provides allows fine-grained - * control over the start time and invalidation, but you - * must make sure that 1) the animation has a start time set, and - * 2) the view will be invalidated when the animation is supposed to - * start. - * - * @param animation The next animation, or null. - */ - public void setAnimation(Animation animation) { - mCurrentAnimation = animation; - if (animation != null) { - animation.reset(); - } - } - /** - * Invoked by a parent ViewGroup to notify the start of the animation - * currently associated with this view. If you override this method, - * always call super.onAnimationStart(); - * - * @see #setAnimation(android.view.animation.Animation) - * @see #getAnimation() - */ - protected void onAnimationStart() { - mPrivateFlags |= ANIMATION_STARTED; - } - /** - * Invoked by a parent ViewGroup to notify the end of the animation - * currently associated with this view. If you override this method, - * always call super.onAnimationEnd(); - * - * @see #setAnimation(android.view.animation.Animation) - * @see #getAnimation() - */ - protected void onAnimationEnd() { - mPrivateFlags &= ~ANIMATION_STARTED; - } - /** - * Invoked if there is a Transform that involves alpha. Subclass that can - * draw themselves with the specified alpha should return true, and then - * respect that alpha when their onDraw() is called. If this returns false - * then the view may be redirected to draw into an offscreen buffer to - * fulfill the request, which will look fine, but may be slower than if the - * subclass handles it internally. The default implementation returns false. - * - * @param alpha The alpha (0..255) to apply to the view's drawing - * @return true if the view can draw with the specified alpha. - */ - protected boolean onSetAlpha(int alpha) { - return false; - } - /** - * This is used by the RootView to perform an optimization when - * the view hierarchy contains one or several SurfaceView. - * SurfaceView is always considered transparent, but its children are not, - * therefore all View objects remove themselves from the global transparent - * region (passed as a parameter to this function). - * - * @param region The transparent region for this ViewAncestor (window). - * - * @return Returns true if the effective visibility of the view at this - * point is opaque, regardless of the transparent region; returns false - * if it is possible for underlying windows to be seen behind the view. - * - * {@hide} - */ - public boolean gatherTransparentRegion(Region region) { - final AttachInfo attachInfo = mAttachInfo; - if (region != null && attachInfo != null) { - final int pflags = mPrivateFlags; - if ((pflags & SKIP_DRAW) == 0) { - // The SKIP_DRAW flag IS NOT set, so this view draws. We need to - // remove it from the transparent region. - final int[] location = attachInfo.mTransparentLocation; - getLocationInWindow(location); - region.op(location[0], location[1], location[0] + mRight - mLeft, - location[1] + mBottom - mTop, Region.Op.DIFFERENCE); - } else if ((pflags & ONLY_DRAWS_BACKGROUND) != 0 && mBGDrawable != null) { - // The ONLY_DRAWS_BACKGROUND flag IS set and the background drawable - // exists, so we remove the background drawable's non-transparent - // parts from this transparent region. - applyDrawableToTransparentRegion(mBGDrawable, region); - } - } - return true; - } - /** - * Play a sound effect for this view. - * - *

The framework will play sound effects for some built in actions, such as - * clicking, but you may wish to play these effects in your widget, - * for instance, for internal navigation. - * - *

The sound effect will only be played if sound effects are enabled by the user, and - * {@link #isSoundEffectsEnabled()} is true. - * - * @param soundConstant One of the constants defined in {@link SoundEffectConstants} - */ - public void playSoundEffect(int soundConstant) { - if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) { - return; - } - mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant); - } - /** - * BZZZTT!!1! - * - *

Provide haptic feedback to the user for this view. - * - *

The framework will provide haptic feedback for some built in actions, - * such as long presses, but you may wish to provide feedback for your - * own widget. - * - *

The feedback will only be performed if - * {@link #isHapticFeedbackEnabled()} is true. - * - * @param feedbackConstant One of the constants defined in - * {@link HapticFeedbackConstants} - */ - public boolean performHapticFeedback(int feedbackConstant) { - return performHapticFeedback(feedbackConstant, 0); - } - /** - * BZZZTT!!1! - * - *

Like {@link #performHapticFeedback(int)}, with additional options. - * - * @param feedbackConstant One of the constants defined in - * {@link HapticFeedbackConstants} - * @param flags Additional flags as per {@link HapticFeedbackConstants}. - */ - public boolean performHapticFeedback(int feedbackConstant, int flags) { - if (mAttachInfo == null) { - return false; - } - //noinspection SimplifiableIfStatement - if ((flags & HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0 - && !isHapticFeedbackEnabled()) { - return false; - } - return mAttachInfo.mRootCallbacks.performHapticFeedback(feedbackConstant, - (flags & HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0); - } - /** - * Request that the visibility of the status bar be changed. - * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE} or - * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. - */ - public void setSystemUiVisibility(int visibility) { - if (visibility != mSystemUiVisibility) { - mSystemUiVisibility = visibility; - if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { - mParent.recomputeViewAttributes(this); - } - } - } - /** - * Returns the status bar visibility that this view has requested. - * @return Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE} or - * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. - */ - public int getSystemUiVisibility() { - return mSystemUiVisibility; - } - /** - * Set a listener to receive callbacks when the visibility of the system bar changes. - * @param l The {@link OnSystemUiVisibilityChangeListener} to receive callbacks. - */ - public void setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) { - getListenerInfo().mOnSystemUiVisibilityChangeListener = l; - if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { - mParent.recomputeViewAttributes(this); - } - } - /** - * Dispatch callbacks to {@link #setOnSystemUiVisibilityChangeListener} down - * the view hierarchy. - */ - public void dispatchSystemUiVisibilityChanged(int visibility) { - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { - li.mOnSystemUiVisibilityChangeListener.onSystemUiVisibilityChange( - visibility & PUBLIC_STATUS_BAR_VISIBILITY_MASK); - } - } - void updateLocalSystemUiVisibility(int localValue, int localChanges) { - int val = (mSystemUiVisibility&~localChanges) | (localValue&localChanges); - if (val != mSystemUiVisibility) { - setSystemUiVisibility(val); - } - } - /** - * Creates an image that the system displays during the drag and drop - * operation. This is called a "drag shadow". The default implementation - * for a DragShadowBuilder based on a View returns an image that has exactly the same - * appearance as the given View. The default also positions the center of the drag shadow - * directly under the touch point. If no View is provided (the constructor with no parameters - * is used), and {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} and - * {@link #onDrawShadow(Canvas) onDrawShadow()} are not overriden, then the - * default is an invisible drag shadow. - *

- * You are not required to use the View you provide to the constructor as the basis of the - * drag shadow. The {@link #onDrawShadow(Canvas) onDrawShadow()} method allows you to draw - * anything you want as the drag shadow. - *

- *

- * You pass a DragShadowBuilder object to the system when you start the drag. The system - * calls {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} to get the - * size and position of the drag shadow. It uses this data to construct a - * {@link android.graphics.Canvas} object, then it calls {@link #onDrawShadow(Canvas) onDrawShadow()} - * so that your application can draw the shadow image in the Canvas. - *

- * - *
- *

Developer Guides

- *

For a guide to implementing drag and drop features, read the - * Drag and Drop developer guide.

- *
- */ - public static class DragShadowBuilder { - private final WeakReference mView; - /** - * Constructs a shadow image builder based on a View. By default, the resulting drag - * shadow will have the same appearance and dimensions as the View, with the touch point - * over the center of the View. - * @param view A View. Any View in scope can be used. - */ - public DragShadowBuilder(View view) { - mView = new WeakReference(view); - } - /** - * Construct a shadow builder object with no associated View. This - * constructor variant is only useful when the {@link #onProvideShadowMetrics(Point, Point)} - * and {@link #onDrawShadow(Canvas)} methods are also overridden in order - * to supply the drag shadow's dimensions and appearance without - * reference to any View object. If they are not overridden, then the result is an - * invisible drag shadow. - */ - public DragShadowBuilder() { - mView = new WeakReference(null); - } - /** - * Returns the View object that had been passed to the - * {@link #View.DragShadowBuilder(View)} - * constructor. If that View parameter was {@code null} or if the - * {@link #View.DragShadowBuilder()} - * constructor was used to instantiate the builder object, this method will return - * null. - * - * @return The View object associate with this builder object. - */ - @SuppressWarnings({"JavadocReference"}) - final public View getView() { - return mView.get(); - } - /** - * Provides the metrics for the shadow image. These include the dimensions of - * the shadow image, and the point within that shadow that should - * be centered under the touch location while dragging. - *

- * The default implementation sets the dimensions of the shadow to be the - * same as the dimensions of the View itself and centers the shadow under - * the touch point. - *

- * - * @param shadowSize A {@link android.graphics.Point} containing the width and height - * of the shadow image. Your application must set {@link android.graphics.Point#x} to the - * desired width and must set {@link android.graphics.Point#y} to the desired height of the - * image. - * - * @param shadowTouchPoint A {@link android.graphics.Point} for the position within the - * shadow image that should be underneath the touch point during the drag and drop - * operation. Your application must set {@link android.graphics.Point#x} to the - * X coordinate and {@link android.graphics.Point#y} to the Y coordinate of this position. - */ - public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { - final View view = mView.get(); - if (view != null) { - shadowSize.set(view.getWidth(), view.getHeight()); - shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2); - } else { - Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view"); - } - } - /** - * Draws the shadow image. The system creates the {@link android.graphics.Canvas} object - * based on the dimensions it received from the - * {@link #onProvideShadowMetrics(Point, Point)} callback. - * - * @param canvas A {@link android.graphics.Canvas} object in which to draw the shadow image. - */ - public void onDrawShadow(Canvas canvas) { - final View view = mView.get(); - if (view != null) { - view.draw(canvas); - } else { - Log.e(View.VIEW_LOG_TAG, "Asked to draw drag shadow but no view"); - } - } - } - /** - * Starts a drag and drop operation. When your application calls this method, it passes a - * {@link android.view.View.DragShadowBuilder} object to the system. The - * system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)} - * to get metrics for the drag shadow, and then calls the object's - * {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself. - *

- * Once the system has the drag shadow, it begins the drag and drop operation by sending - * drag events to all the View objects in your application that are currently visible. It does - * this either by calling the View object's drag listener (an implementation of - * {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the - * View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method. - * Both are passed a {@link android.view.DragEvent} object that has a - * {@link android.view.DragEvent#getAction()} value of - * {@link android.view.DragEvent#ACTION_DRAG_STARTED}. - *

- *

- * Your application can invoke startDrag() on any attached View object. The View object does not - * need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to - * be related to the View the user selected for dragging. - *

- * @param data A {@link android.content.ClipData} object pointing to the data to be - * transferred by the drag and drop operation. - * @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the - * drag shadow. - * @param myLocalState An {@link java.lang.Object} containing local data about the drag and - * drop operation. This Object is put into every DragEvent object sent by the system during the - * current drag. - *

- * myLocalState is a lightweight mechanism for the sending information from the dragged View - * to the target Views. For example, it can contain flags that differentiate between a - * a copy operation and a move operation. - *

- * @param flags Flags that control the drag and drop operation. No flags are currently defined, - * so the parameter should be set to 0. - * @return {@code true} if the method completes successfully, or - * {@code false} if it fails anywhere. Returning {@code false} means the system was unable to - * do a drag, and so no drag operation is in progress. - */ - public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, - Object myLocalState, int flags) { - if (ViewDebug.DEBUG_DRAG) { - Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags); - } - boolean okay = false; - Point shadowSize = new Point(); - Point shadowTouchPoint = new Point(); - shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint); - if ((shadowSize.x < 0) || (shadowSize.y < 0) || - (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) { - throw new IllegalStateException("Drag shadow dimensions must not be negative"); - } - if (ViewDebug.DEBUG_DRAG) { - Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y - + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y); - } - Surface surface = new Surface(); - try { - IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, - flags, shadowSize.x, shadowSize.y, surface); - if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token - + " surface=" + surface); - if (token != null) { - Canvas canvas = surface.lockCanvas(null); - try { - canvas.drawColor(0, PorterDuff.Mode.CLEAR); - shadowBuilder.onDrawShadow(canvas); - } finally { - surface.unlockCanvasAndPost(canvas); - } - final ViewRootImpl root = getViewRootImpl(); - // Cache the local state object for delivery with DragEvents - root.setLocalDragState(myLocalState); - // repurpose 'shadowSize' for the last touch point - root.getLastTouchPoint(shadowSize); - okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, - shadowSize.x, shadowSize.y, - shadowTouchPoint.x, shadowTouchPoint.y, data); - if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "performDrag returned " + okay); - // Off and running! Release our local surface instance; the drag - // shadow surface is now managed by the system process. - surface.release(); - } - } catch (Exception e) { - Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e); - surface.destroy(); - } - return okay; - } - /** - * Handles drag events sent by the system following a call to - * {@link android.view.View#startDrag(ClipData,DragShadowBuilder,Object,int) startDrag()}. - *

- * When the system calls this method, it passes a - * {@link android.view.DragEvent} object. A call to - * {@link android.view.DragEvent#getAction()} returns one of the action type constants defined - * in DragEvent. The method uses these to determine what is happening in the drag and drop - * operation. - * @param event The {@link android.view.DragEvent} sent by the system. - * The {@link android.view.DragEvent#getAction()} method returns an action type constant defined - * in DragEvent, indicating the type of drag event represented by this object. - * @return {@code true} if the method was successful, otherwise {@code false}. - *

- * The method should return {@code true} in response to an action type of - * {@link android.view.DragEvent#ACTION_DRAG_STARTED} to receive drag events for the current - * operation. - *

- *

- * The method should also return {@code true} in response to an action type of - * {@link android.view.DragEvent#ACTION_DROP} if it consumed the drop, or - * {@code false} if it didn't. - *

- */ - public boolean onDragEvent(DragEvent event) { - return false; - } - /** - * Detects if this View is enabled and has a drag event listener. - * If both are true, then it calls the drag event listener with the - * {@link android.view.DragEvent} it received. If the drag event listener returns - * {@code true}, then dispatchDragEvent() returns {@code true}. - *

- * For all other cases, the method calls the - * {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} drag event handler - * method and returns its result. - *

- *

- * This ensures that a drag event is always consumed, even if the View does not have a drag - * event listener. However, if the View has a listener and the listener returns true, then - * onDragEvent() is not called. - *

- */ - public boolean dispatchDragEvent(DragEvent event) { - //noinspection SimplifiableIfStatement - ListenerInfo li = mListenerInfo; - if (li != null && li.mOnDragListener != null && (mViewFlags & ENABLED_MASK) == ENABLED - && li.mOnDragListener.onDrag(this, event)) { - return true; - } - return onDragEvent(event); - } - boolean canAcceptDrag() { - return (mPrivateFlags2 & DRAG_CAN_ACCEPT) != 0; - } - /** - * This needs to be a better API (NOT ON VIEW) before it is exposed. If - * it is ever exposed at all. - * @hide - */ - public void onCloseSystemDialogs(String reason) { - } - /** - * Given a Drawable whose bounds have been set to draw into this view, - * update a Region being computed for - * {@link #gatherTransparentRegion(android.graphics.Region)} so - * that any non-transparent parts of the Drawable are removed from the - * given transparent region. - * - * @param dr The Drawable whose transparency is to be applied to the region. - * @param region A Region holding the current transparency information, - * where any parts of the region that are set are considered to be - * transparent. On return, this region will be modified to have the - * transparency information reduced by the corresponding parts of the - * Drawable that are not transparent. - * {@hide} - */ - public void applyDrawableToTransparentRegion(Drawable dr, Region region) { - if (DBG) { - Log.i("View", "Getting transparent region for: " + this); - } - final Region r = dr.getTransparentRegion(); - final Rect db = dr.getBounds(); - final AttachInfo attachInfo = mAttachInfo; - if (r != null && attachInfo != null) { - final int w = getRight()-getLeft(); - final int h = getBottom()-getTop(); - if (db.left > 0) { - //Log.i("VIEW", "Drawable left " + db.left + " > view 0"); - r.op(0, 0, db.left, h, Region.Op.UNION); - } - if (db.right < w) { - //Log.i("VIEW", "Drawable right " + db.right + " < view " + w); - r.op(db.right, 0, w, h, Region.Op.UNION); - } - if (db.top > 0) { - //Log.i("VIEW", "Drawable top " + db.top + " > view 0"); - r.op(0, 0, w, db.top, Region.Op.UNION); - } - if (db.bottom < h) { - //Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h); - r.op(0, db.bottom, w, h, Region.Op.UNION); - } - final int[] location = attachInfo.mTransparentLocation; - getLocationInWindow(location); - r.translate(location[0], location[1]); - region.op(r, Region.Op.INTERSECT); - } else { - region.op(db, Region.Op.DIFFERENCE); - } - } - private void checkForLongClick(int delayOffset) { - if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) { - mHasPerformedLongPress = false; - if (mPendingCheckForLongPress == null) { - mPendingCheckForLongPress = new CheckForLongPress(); - } - mPendingCheckForLongPress.rememberWindowAttachCount(); - postDelayed(mPendingCheckForLongPress, - ViewConfiguration.getLongPressTimeout() - delayOffset); - } - } - /** - * Inflate a view from an XML resource. This convenience method wraps the {@link - * LayoutInflater} class, which provides a full range of options for view inflation. - * - * @param context The Context object for your activity or application. - * @param resource The resource ID to inflate - * @param root A view group that will be the parent. Used to properly inflate the - * layout_* parameters. - * @see LayoutInflater - */ - public static View inflate(Context context, int resource, ViewGroup root) { - LayoutInflater factory = LayoutInflater.from(context); - return factory.inflate(resource, root); - } - /** - * Scroll the view with standard behavior for scrolling beyond the normal - * content boundaries. Views that call this method should override - * {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the - * results of an over-scroll operation. - * - * Views can use this method to handle any touch or fling-based scrolling. - * - * @param deltaX Change in X in pixels - * @param deltaY Change in Y in pixels - * @param scrollX Current X scroll value in pixels before applying deltaX - * @param scrollY Current Y scroll value in pixels before applying deltaY - * @param scrollRangeX Maximum content scroll range along the X axis - * @param scrollRangeY Maximum content scroll range along the Y axis - * @param maxOverScrollX Number of pixels to overscroll by in either direction - * along the X axis. - * @param maxOverScrollY Number of pixels to overscroll by in either direction - * along the Y axis. - * @param isTouchEvent true if this scroll operation is the result of a touch event. - * @return true if scrolling was clamped to an over-scroll boundary along either - * axis, false otherwise. - */ - @SuppressWarnings({"UnusedParameters"}) - protected boolean overScrollBy(int deltaX, int deltaY, - int scrollX, int scrollY, - int scrollRangeX, int scrollRangeY, - int maxOverScrollX, int maxOverScrollY, - boolean isTouchEvent) { - final int overScrollMode = mOverScrollMode; - final boolean canScrollHorizontal = - computeHorizontalScrollRange() > computeHorizontalScrollExtent(); - final boolean canScrollVertical = - computeVerticalScrollRange() > computeVerticalScrollExtent(); - final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS || - (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal); - final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS || - (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical); - int newScrollX = scrollX + deltaX; - if (!overScrollHorizontal) { - maxOverScrollX = 0; - } - int newScrollY = scrollY + deltaY; - if (!overScrollVertical) { - maxOverScrollY = 0; - } - // Clamp values if at the limits and record - final int left = -maxOverScrollX; - final int right = maxOverScrollX + scrollRangeX; - final int top = -maxOverScrollY; - final int bottom = maxOverScrollY + scrollRangeY; - boolean clampedX = false; - if (newScrollX > right) { - newScrollX = right; - clampedX = true; - } else if (newScrollX < left) { - newScrollX = left; - clampedX = true; - } - boolean clampedY = false; - if (newScrollY > bottom) { - newScrollY = bottom; - clampedY = true; - } else if (newScrollY < top) { - newScrollY = top; - clampedY = true; - } - onOverScrolled(newScrollX, newScrollY, clampedX, clampedY); - return clampedX || clampedY; - } - /** - * Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to - * respond to the results of an over-scroll operation. - * - * @param scrollX New X scroll value in pixels - * @param scrollY New Y scroll value in pixels - * @param clampedX True if scrollX was clamped to an over-scroll boundary - * @param clampedY True if scrollY was clamped to an over-scroll boundary - */ - protected void onOverScrolled(int scrollX, int scrollY, - boolean clampedX, boolean clampedY) { - // Intentionally empty. - } - /** - * Returns the over-scroll mode for this view. The result will be - * one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} - * (allow over-scrolling only if the view content is larger than the container), - * or {@link #OVER_SCROLL_NEVER}. - * - * @return This view's over-scroll mode. - */ - public int getOverScrollMode() { - return mOverScrollMode; - } - /** - * Set the over-scroll mode for this view. Valid over-scroll modes are - * {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} - * (allow over-scrolling only if the view content is larger than the container), - * or {@link #OVER_SCROLL_NEVER}. - * - * Setting the over-scroll mode of a view will have an effect only if the - * view is capable of scrolling. - * - * @param overScrollMode The new over-scroll mode for this view. - */ - public void setOverScrollMode(int overScrollMode) { - if (overScrollMode != OVER_SCROLL_ALWAYS && - overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS && - overScrollMode != OVER_SCROLL_NEVER) { - throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode); - } - mOverScrollMode = overScrollMode; - } - /** - * Gets a scale factor that determines the distance the view should scroll - * vertically in response to {@link MotionEvent#ACTION_SCROLL}. - * @return The vertical scroll scale factor. - * @hide - */ - protected float getVerticalScrollFactor() { - if (mVerticalScrollFactor == 0) { - TypedValue outValue = new TypedValue(); - if (!mContext.getTheme().resolveAttribute( - com.android.internal.R.attr.listPreferredItemHeight, outValue, true)) { - throw new IllegalStateException( - "Expected theme to define listPreferredItemHeight."); - } - mVerticalScrollFactor = outValue.getDimension( - mContext.getResources().getDisplayMetrics()); - } - return mVerticalScrollFactor; - } - /** - * Gets a scale factor that determines the distance the view should scroll - * horizontally in response to {@link MotionEvent#ACTION_SCROLL}. - * @return The horizontal scroll scale factor. - * @hide - */ - protected float getHorizontalScrollFactor() { - // TODO: Should use something else. - return getVerticalScrollFactor(); - } - /** - * Return the value specifying the text direction or policy that was set with - * {@link #setTextDirection(int)}. - * - * @return the defined text direction. It can be one of: - * - * {@link #TEXT_DIRECTION_INHERIT}, - * {@link #TEXT_DIRECTION_FIRST_STRONG} - * {@link #TEXT_DIRECTION_ANY_RTL}, - * {@link #TEXT_DIRECTION_LTR}, - * {@link #TEXT_DIRECTION_RTL}, - * {@link #TEXT_DIRECTION_LOCALE}, - * - */ - public int getTextDirection() { - return mTextDirection; - } - /** - * Set the text direction. - * - * @param textDirection the direction to set. Should be one of: - * - * {@link #TEXT_DIRECTION_INHERIT}, - * {@link #TEXT_DIRECTION_FIRST_STRONG} - * {@link #TEXT_DIRECTION_ANY_RTL}, - * {@link #TEXT_DIRECTION_LTR}, - * {@link #TEXT_DIRECTION_RTL}, - * {@link #TEXT_DIRECTION_LOCALE}, - * - */ - public void setTextDirection(int textDirection) { - if (textDirection != mTextDirection) { - mTextDirection = textDirection; - resetResolvedTextDirection(); - requestLayout(); - } - } - /** - * Return the resolved text direction. - * - * @return the resolved text direction. Return one of: - * - * {@link #TEXT_DIRECTION_FIRST_STRONG} - * {@link #TEXT_DIRECTION_ANY_RTL}, - * {@link #TEXT_DIRECTION_LTR}, - * {@link #TEXT_DIRECTION_RTL}, - * {@link #TEXT_DIRECTION_LOCALE}, - * - */ - public int getResolvedTextDirection() { - if (mResolvedTextDirection == TEXT_DIRECTION_INHERIT) { - resolveTextDirection(); - } - return mResolvedTextDirection; - } - /** - * Resolve the text direction. - * - */ - protected void resolveTextDirection() { - if (mTextDirection != TEXT_DIRECTION_INHERIT) { - mResolvedTextDirection = mTextDirection; - return; - } - if (mParent != null && mParent instanceof ViewGroup) { - mResolvedTextDirection = ((ViewGroup) mParent).getResolvedTextDirection(); - return; - } - mResolvedTextDirection = TEXT_DIRECTION_FIRST_STRONG; - } - /** - * Reset resolved text direction. Will be resolved during a call to getResolvedTextDirection(). - * - */ - protected void resetResolvedTextDirection() { - mResolvedTextDirection = TEXT_DIRECTION_INHERIT; - } - // - // Properties - // - /** - * A Property wrapper around the alpha functionality handled by the - * {@link View#setAlpha(float)} and {@link View#getAlpha()} methods. - */ - public static final Property ALPHA = new FloatProperty("alpha") { - @Override - public void setValue(View object, float value) { - object.setAlpha(value); - } - @Override - public Float get(View object) { - return object.getAlpha(); - } - }; - /** - * A Property wrapper around the translationX functionality handled by the - * {@link View#setTranslationX(float)} and {@link View#getTranslationX()} methods. - */ - public static final Property TRANSLATION_X = new FloatProperty("translationX") { - @Override - public void setValue(View object, float value) { - object.setTranslationX(value); - } - @Override - public Float get(View object) { - return object.getTranslationX(); - } - }; - /** - * A Property wrapper around the translationY functionality handled by the - * {@link View#setTranslationY(float)} and {@link View#getTranslationY()} methods. - */ - public static final Property TRANSLATION_Y = new FloatProperty("translationY") { - @Override - public void setValue(View object, float value) { - object.setTranslationY(value); - } - @Override - public Float get(View object) { - return object.getTranslationY(); - } - }; - /** - * A Property wrapper around the x functionality handled by the - * {@link View#setX(float)} and {@link View#getX()} methods. - */ - public static final Property X = new FloatProperty("x") { - @Override - public void setValue(View object, float value) { - object.setX(value); - } - @Override - public Float get(View object) { - return object.getX(); - } - }; - /** - * A Property wrapper around the y functionality handled by the - * {@link View#setY(float)} and {@link View#getY()} methods. - */ - public static final Property Y = new FloatProperty("y") { - @Override - public void setValue(View object, float value) { - object.setY(value); - } - @Override - public Float get(View object) { - return object.getY(); - } - }; - /** - * A Property wrapper around the rotation functionality handled by the - * {@link View#setRotation(float)} and {@link View#getRotation()} methods. - */ - public static final Property ROTATION = new FloatProperty("rotation") { - @Override - public void setValue(View object, float value) { - object.setRotation(value); - } - @Override - public Float get(View object) { - return object.getRotation(); - } - }; - /** - * A Property wrapper around the rotationX functionality handled by the - * {@link View#setRotationX(float)} and {@link View#getRotationX()} methods. - */ - public static final Property ROTATION_X = new FloatProperty("rotationX") { - @Override - public void setValue(View object, float value) { - object.setRotationX(value); - } - @Override - public Float get(View object) { - return object.getRotationX(); - } - }; - /** - * A Property wrapper around the rotationY functionality handled by the - * {@link View#setRotationY(float)} and {@link View#getRotationY()} methods. - */ - public static final Property ROTATION_Y = new FloatProperty("rotationY") { - @Override - public void setValue(View object, float value) { - object.setRotationY(value); - } - @Override - public Float get(View object) { - return object.getRotationY(); - } - }; - /** - * A Property wrapper around the scaleX functionality handled by the - * {@link View#setScaleX(float)} and {@link View#getScaleX()} methods. - */ - public static final Property SCALE_X = new FloatProperty("scaleX") { - @Override - public void setValue(View object, float value) { - object.setScaleX(value); - } - @Override - public Float get(View object) { - return object.getScaleX(); - } - }; - /** - * A Property wrapper around the scaleY functionality handled by the - * {@link View#setScaleY(float)} and {@link View#getScaleY()} methods. - */ - public static final Property SCALE_Y = new FloatProperty("scaleY") { - @Override - public void setValue(View object, float value) { - object.setScaleY(value); - } - @Override - public Float get(View object) { - return object.getScaleY(); - } - }; - /** - * A MeasureSpec encapsulates the layout requirements passed from parent to child. - * Each MeasureSpec represents a requirement for either the width or the height. - * A MeasureSpec is comprised of a size and a mode. There are three possible - * modes: - *
- *
UNSPECIFIED
- *
- * The parent has not imposed any constraint on the child. It can be whatever size - * it wants. - *
- * - *
EXACTLY
- *
- * The parent has determined an exact size for the child. The child is going to be - * given those bounds regardless of how big it wants to be. - *
- * - *
AT_MOST
- *
- * The child can be as large as it wants up to the specified size. - *
- *
- * - * MeasureSpecs are implemented as ints to reduce object allocation. This class - * is provided to pack and unpack the <size, mode> tuple into the int. - */ - public static class MeasureSpec { - private static final int MODE_SHIFT = 30; - private static final int MODE_MASK = 0x3 << MODE_SHIFT; - /** - * Measure specification mode: The parent has not imposed any constraint - * on the child. It can be whatever size it wants. - */ - public static final int UNSPECIFIED = 0 << MODE_SHIFT; - /** - * Measure specification mode: The parent has determined an exact size - * for the child. The child is going to be given those bounds regardless - * of how big it wants to be. - */ - public static final int EXACTLY = 1 << MODE_SHIFT; - /** - * Measure specification mode: The child can be as large as it wants up - * to the specified size. - */ - public static final int AT_MOST = 2 << MODE_SHIFT; - /** - * Creates a measure specification based on the supplied size and mode. - * - * The mode must always be one of the following: - *
    - *
  • {@link android.view.View.MeasureSpec#UNSPECIFIED}
    • - *
  • {@link android.view.View.MeasureSpec#EXACTLY}
    • - *
  • {@link android.view.View.MeasureSpec#AT_MOST}
    • - *
- * - * @param size the size of the measure specification - * @param mode the mode of the measure specification - * @return the measure specification based on size and mode - */ - public static int makeMeasureSpec(int size, int mode) { - return size + mode; - } - /** - * Extracts the mode from the supplied measure specification. - * - * @param measureSpec the measure specification to extract the mode from - * @return {@link android.view.View.MeasureSpec#UNSPECIFIED}, - * {@link android.view.View.MeasureSpec#AT_MOST} or - * {@link android.view.View.MeasureSpec#EXACTLY} - */ - public static int getMode(int measureSpec) { - return (measureSpec & MODE_MASK); - } - /** - * Extracts the size from the supplied measure specification. - * - * @param measureSpec the measure specification to extract the size from - * @return the size in pixels defined in the supplied measure specification - */ - public static int getSize(int measureSpec) { - return (measureSpec & ~MODE_MASK); - } - /** - * Returns a String representation of the specified measure - * specification. - * - * @param measureSpec the measure specification to convert to a String - * @return a String with the following format: "MeasureSpec: MODE SIZE" - */ - public static String toString(int measureSpec) { - int mode = getMode(measureSpec); - int size = getSize(measureSpec); - StringBuilder sb = new StringBuilder("MeasureSpec: "); - if (mode == UNSPECIFIED) - sb.append("UNSPECIFIED "); - else if (mode == EXACTLY) - sb.append("EXACTLY "); - else if (mode == AT_MOST) - sb.append("AT_MOST "); - else - sb.append(mode).append(" "); - sb.append(size); - return sb.toString(); - } - } - class CheckForLongPress implements Runnable { - private int mOriginalWindowAttachCount; - public void run() { - if (isPressed() && (mParent != null) - && mOriginalWindowAttachCount == mWindowAttachCount) { - if (performLongClick()) { - mHasPerformedLongPress = true; - } - } - } - public void rememberWindowAttachCount() { - mOriginalWindowAttachCount = mWindowAttachCount; - } - } - private final class CheckForTap implements Runnable { - public void run() { - mPrivateFlags &= ~PREPRESSED; - mPrivateFlags |= PRESSED; - refreshDrawableState(); - checkForLongClick(ViewConfiguration.getTapTimeout()); - } - } - private final class PerformClick implements Runnable { - public void run() { - performClick(); - } - } - /** @hide */ - public void hackTurnOffWindowResizeAnim(boolean off) { - mAttachInfo.mTurnOffWindowResizeAnim = off; - } - /** - * This method returns a ViewPropertyAnimator object, which can be used to animate - * specific properties on this View. - * - * @return ViewPropertyAnimator The ViewPropertyAnimator associated with this View. - */ - public ViewPropertyAnimator animate() { - if (mAnimator == null) { - mAnimator = new ViewPropertyAnimator(this); - } - return mAnimator; - } - /** - * Interface definition for a callback to be invoked when a key event is - * dispatched to this view. The callback will be invoked before the key - * event is given to the view. - */ - public interface OnKeyListener { - /** - * Called when a key is dispatched to a view. This allows listeners to - * get a chance to respond before the target view. - * - * @param v The view the key has been dispatched to. - * @param keyCode The code for the physical key that was pressed - * @param event The KeyEvent object containing full information about - * the event. - * @return True if the listener has consumed the event, false otherwise. - */ - boolean onKey(View v, int keyCode, KeyEvent event); - } - /** - * Interface definition for a callback to be invoked when a touch event is - * dispatched to this view. The callback will be invoked before the touch - * event is given to the view. - */ - public interface OnTouchListener { - /** - * Called when a touch event is dispatched to a view. This allows listeners to - * get a chance to respond before the target view. - * - * @param v The view the touch event has been dispatched to. - * @param event The MotionEvent object containing full information about - * the event. - * @return True if the listener has consumed the event, false otherwise. - */ - boolean onTouch(View v, MotionEvent event); - } - /** - * Interface definition for a callback to be invoked when a hover event is - * dispatched to this view. The callback will be invoked before the hover - * event is given to the view. - */ - public interface OnHoverListener { - /** - * Called when a hover event is dispatched to a view. This allows listeners to - * get a chance to respond before the target view. - * - * @param v The view the hover event has been dispatched to. - * @param event The MotionEvent object containing full information about - * the event. - * @return True if the listener has consumed the event, false otherwise. - */ - boolean onHover(View v, MotionEvent event); - } - /** - * Interface definition for a callback to be invoked when a generic motion event is - * dispatched to this view. The callback will be invoked before the generic motion - * event is given to the view. - */ - public interface OnGenericMotionListener { - /** - * Called when a generic motion event is dispatched to a view. This allows listeners to - * get a chance to respond before the target view. - * - * @param v The view the generic motion event has been dispatched to. - * @param event The MotionEvent object containing full information about - * the event. - * @return True if the listener has consumed the event, false otherwise. - */ - boolean onGenericMotion(View v, MotionEvent event); - } - /** - * Interface definition for a callback to be invoked when a view has been clicked and held. - */ - public interface OnLongClickListener { - /** - * Called when a view has been clicked and held. - * - * @param v The view that was clicked and held. - * - * @return true if the callback consumed the long click, false otherwise. - */ - boolean onLongClick(View v); - } - /** - * Interface definition for a callback to be invoked when a drag is being dispatched - * to this view. The callback will be invoked before the hosting view's own - * onDrag(event) method. If the listener wants to fall back to the hosting view's - * onDrag(event) behavior, it should return 'false' from this callback. - * - *
- *

Developer Guides

- *

For a guide to implementing drag and drop features, read the - * Drag and Drop developer guide.

- *
- */ - public interface OnDragListener { - /** - * Called when a drag event is dispatched to a view. This allows listeners - * to get a chance to override base View behavior. - * - * @param v The View that received the drag event. - * @param event The {@link android.view.DragEvent} object for the drag event. - * @return {@code true} if the drag event was handled successfully, or {@code false} - * if the drag event was not handled. Note that {@code false} will trigger the View - * to call its {@link #onDragEvent(DragEvent) onDragEvent()} handler. - */ - boolean onDrag(View v, DragEvent event); - } - /** - * Interface definition for a callback to be invoked when the focus state of - * a view changed. - */ - public interface OnFocusChangeListener { - /** - * Called when the focus state of a view has changed. - * - * @param v The view whose state has changed. - * @param hasFocus The new focus state of v. - */ - void onFocusChange(View v, boolean hasFocus); - } - /** - * Interface definition for a callback to be invoked when a view is clicked. - */ - public interface OnClickListener { - /** - * Called when a view has been clicked. - * - * @param v The view that was clicked. - */ - void onClick(View v); - } - /** - * Interface definition for a callback to be invoked when the context menu - * for this view is being built. - */ - public interface OnCreateContextMenuListener { - /** - * Called when the context menu for this view is being built. It is not - * safe to hold onto the menu after this method returns. - * - * @param menu The context menu that is being built - * @param v The view for which the context menu is being built - * @param menuInfo Extra information about the item for which the - * context menu should be shown. This information will vary - * depending on the class of v. - */ - void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo); - } - /** - * Interface definition for a callback to be invoked when the status bar changes - * visibility. This reports global changes to the system UI - * state, not just what the application is requesting. - * - * @see View#setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) - */ - public interface OnSystemUiVisibilityChangeListener { - /** - * Called when the status bar changes visibility because of a call to - * {@link View#setSystemUiVisibility(int)}. - * - * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE} or - * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. This tells you the - * global state of the UI visibility flags, not what your - * app is currently applying. - */ - public void onSystemUiVisibilityChange(int visibility); - } - /** - * Interface definition for a callback to be invoked when this view is attached - * or detached from its window. - */ - public interface OnAttachStateChangeListener { - /** - * Called when the view is attached to a window. - * @param v The view that was attached - */ - public void onViewAttachedToWindow(View v); - /** - * Called when the view is detached from a window. - * @param v The view that was detached - */ - public void onViewDetachedFromWindow(View v); - } - private final class UnsetPressedState implements Runnable { - public void run() { - setPressed(false); - } - } - /** - * Base class for derived classes that want to save and restore their own - * state in {@link android.view.View#onSaveInstanceState()}. - */ - public static class BaseSavedState extends AbsSavedState { - /** - * Constructor used when reading from a parcel. Reads the state of the superclass. - * - * @param source - */ - public BaseSavedState(Parcel source) { - super(source); - } - /** - * Constructor called by derived classes when creating their SavedState objects - * - * @param superState The state of the superclass of this view - */ - public BaseSavedState(Parcelable superState) { - super(superState); - } - public static final Parcelable.Creator CREATOR = - new Parcelable.Creator() { - public BaseSavedState createFromParcel(Parcel in) { - return new BaseSavedState(in); - } - public BaseSavedState[] newArray(int size) { - return new BaseSavedState[size]; - } - }; - } - /** - * A set of information given to a view when it is attached to its parent - * window. - */ - static class AttachInfo { - interface Callbacks { - void playSoundEffect(int effectId); - boolean performHapticFeedback(int effectId, boolean always); - } - /** - * InvalidateInfo is used to post invalidate(int, int, int, int) messages - * to a Handler. This class contains the target (View) to invalidate and - * the coordinates of the dirty rectangle. - * - * For performance purposes, this class also implements a pool of up to - * POOL_LIMIT objects that get reused. This reduces memory allocations - * whenever possible. - */ - static class InvalidateInfo implements Poolable { - private static final int POOL_LIMIT = 10; - private static final Pool sPool = Pools.synchronizedPool( - Pools.finitePool(new PoolableManager() { - public InvalidateInfo newInstance() { - return new InvalidateInfo(); - } - public void onAcquired(InvalidateInfo element) { - } - public void onReleased(InvalidateInfo element) { - element.target = null; - } - }, POOL_LIMIT) - ); - private InvalidateInfo mNext; - private boolean mIsPooled; - View target; - int left; - int top; - int right; - int bottom; - public void setNextPoolable(InvalidateInfo element) { - mNext = element; - } - public InvalidateInfo getNextPoolable() { - return mNext; - } - static InvalidateInfo acquire() { - return sPool.acquire(); - } - void release() { - sPool.release(this); - } - public boolean isPooled() { - return mIsPooled; - } - public void setPooled(boolean isPooled) { - mIsPooled = isPooled; - } - } - final IWindowSession mSession; - final IWindow mWindow; - final IBinder mWindowToken; - final Callbacks mRootCallbacks; - HardwareCanvas mHardwareCanvas; - /** - * The top view of the hierarchy. - */ - View mRootView; - IBinder mPanelParentWindowToken; - Surface mSurface; - boolean mHardwareAccelerated; - boolean mHardwareAccelerationRequested; - HardwareRenderer mHardwareRenderer; - /** - * Scale factor used by the compatibility mode - */ - float mApplicationScale; - /** - * Indicates whether the application is in compatibility mode - */ - boolean mScalingRequired; - /** - * If set, ViewAncestor doesn't use its lame animation for when the window resizes. - */ - boolean mTurnOffWindowResizeAnim; - /** - * Left position of this view's window - */ - int mWindowLeft; - /** - * Top position of this view's window - */ - int mWindowTop; - /** - * Indicates whether views need to use 32-bit drawing caches - */ - boolean mUse32BitDrawingCache; - /** - * For windows that are full-screen but using insets to layout inside - * of the screen decorations, these are the current insets for the - * content of the window. - */ - final Rect mContentInsets = new Rect(); - /** - * For windows that are full-screen but using insets to layout inside - * of the screen decorations, these are the current insets for the - * actual visible parts of the window. - */ - final Rect mVisibleInsets = new Rect(); - /** - * The internal insets given by this window. This value is - * supplied by the client (through - * {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will - * be given to the window manager when changed to be used in laying - * out windows behind it. - */ - final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets - = new ViewTreeObserver.InternalInsetsInfo(); - /** - * All views in the window's hierarchy that serve as scroll containers, - * used to determine if the window can be resized or must be panned - * to adjust for a soft input area. - */ - final ArrayList mScrollContainers = new ArrayList(); - final KeyEvent.DispatcherState mKeyDispatchState - = new KeyEvent.DispatcherState(); - /** - * Indicates whether the view's window currently has the focus. - */ - boolean mHasWindowFocus; - /** - * The current visibility of the window. - */ - int mWindowVisibility; - /** - * Indicates the time at which drawing started to occur. - */ - long mDrawingTime; - /** - * Indicates whether or not ignoring the DIRTY_MASK flags. - */ - boolean mIgnoreDirtyState; - /** - * This flag tracks when the mIgnoreDirtyState flag is set during draw(), - * to avoid clearing that flag prematurely. - */ - boolean mSetIgnoreDirtyState = false; - /** - * Indicates whether the view's window is currently in touch mode. - */ - boolean mInTouchMode; - /** - * Indicates that ViewAncestor should trigger a global layout change - * the next time it performs a traversal - */ - boolean mRecomputeGlobalAttributes; - /** - * Always report new attributes at next traversal. - */ - boolean mForceReportNewAttributes; - /** - * Set during a traveral if any views want to keep the screen on. - */ - boolean mKeepScreenOn; - /** - * Bitwise-or of all of the values that views have passed to setSystemUiVisibility(). - */ - int mSystemUiVisibility; - /** - * True if a view in this hierarchy has an OnSystemUiVisibilityChangeListener - * attached. - */ - boolean mHasSystemUiListeners; - /** - * Set if the visibility of any views has changed. - */ - boolean mViewVisibilityChanged; - /** - * Set to true if a view has been scrolled. - */ - boolean mViewScrollChanged; - /** - * Global to the view hierarchy used as a temporary for dealing with - * x/y points in the transparent region computations. - */ - final int[] mTransparentLocation = new int[2]; - /** - * Global to the view hierarchy used as a temporary for dealing with - * x/y points in the ViewGroup.invalidateChild implementation. - */ - final int[] mInvalidateChildLocation = new int[2]; - /** - * Global to the view hierarchy used as a temporary for dealing with - * x/y location when view is transformed. - */ - final float[] mTmpTransformLocation = new float[2]; - /** - * The view tree observer used to dispatch global events like - * layout, pre-draw, touch mode change, etc. - */ - final ViewTreeObserver mTreeObserver = new ViewTreeObserver(); - /** - * A Canvas used by the view hierarchy to perform bitmap caching. - */ - Canvas mCanvas; - /** - * The view root impl. - */ - final ViewRootImpl mViewRootImpl; - /** - * A Handler supplied by a view's {@link android.view.ViewRootImpl}. This - * handler can be used to pump events in the UI events queue. - */ - final Handler mHandler; - /** - * Temporary for use in computing invalidate rectangles while - * calling up the hierarchy. - */ - final Rect mTmpInvalRect = new Rect(); - /** - * Temporary for use in computing hit areas with transformed views - */ - final RectF mTmpTransformRect = new RectF(); - /** - * Temporary list for use in collecting focusable descendents of a view. - */ - final ArrayList mFocusablesTempList = new ArrayList(24); - /** - * The id of the window for accessibility purposes. - */ - int mAccessibilityWindowId = View.NO_ID; - /** - * Creates a new set of attachment information with the specified - * events handler and thread. - * - * @param handler the events handler the view must use - */ - AttachInfo(IWindowSession session, IWindow window, - ViewRootImpl viewRootImpl, Handler handler, Callbacks effectPlayer) { - mSession = session; - mWindow = window; - mWindowToken = window.asBinder(); - mViewRootImpl = viewRootImpl; - mHandler = handler; - mRootCallbacks = effectPlayer; - } - } - /** - *

ScrollabilityCache holds various fields used by a View when scrolling - * is supported. This avoids keeping too many unused fields in most - * instances of View.

- */ - private static class ScrollabilityCache implements Runnable { - /** - * Scrollbars are not visible - */ - public static final int OFF = 0; - /** - * Scrollbars are visible - */ - public static final int ON = 1; - /** - * Scrollbars are fading away - */ - public static final int FADING = 2; - public boolean fadeScrollBars; - public int fadingEdgeLength; - public int scrollBarDefaultDelayBeforeFade; - public int scrollBarFadeDuration; - public int scrollBarSize; - public ScrollBarDrawable scrollBar; - public float[] interpolatorValues; - public View host; - public final Paint paint; - public final Matrix matrix; - public Shader shader; - public final Interpolator scrollBarInterpolator = new Interpolator(1, 2); - private static final float[] OPAQUE = { 255 }; - private static final float[] TRANSPARENT = { 0.0f }; - /** - * When fading should start. This time moves into the future every time - * a new scroll happens. Measured based on SystemClock.uptimeMillis() - */ - public long fadeStartTime; - /** - * The current state of the scrollbars: ON, OFF, or FADING - */ - public int state = OFF; - private int mLastColor; - public ScrollabilityCache(ViewConfiguration configuration, View host) { - fadingEdgeLength = configuration.getScaledFadingEdgeLength(); - scrollBarSize = configuration.getScaledScrollBarSize(); - scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay(); - scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration(); - paint = new Paint(); - matrix = new Matrix(); - // use use a height of 1, and then wack the matrix each time we - // actually use it. - shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); - paint.setShader(shader); - paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); - this.host = host; - } - public void setFadeColor(int color) { - if (color != 0 && color != mLastColor) { - mLastColor = color; - color |= 0xFF000000; - shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000, - color & 0x00FFFFFF, Shader.TileMode.CLAMP); - paint.setShader(shader); - // Restore the default transfer mode (src_over) - paint.setXfermode(null); - } - } - public void run() { - long now = AnimationUtils.currentAnimationTimeMillis(); - if (now >= fadeStartTime) { - // the animation fades the scrollbars out by changing - // the opacity (alpha) from fully opaque to fully - // transparent - int nextFrame = (int) now; - int framesCount = 0; - Interpolator interpolator = scrollBarInterpolator; - // Start opaque - interpolator.setKeyFrame(framesCount++, nextFrame, OPAQUE); - // End transparent - nextFrame += scrollBarFadeDuration; - interpolator.setKeyFrame(framesCount, nextFrame, TRANSPARENT); - state = FADING; - // Kick off the fade animation - host.invalidate(true); - } - } - } - /** - * Resuable callback for sending - * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. - */ - private class SendViewScrolledAccessibilityEvent implements Runnable { - public volatile boolean mIsPending; - public void run() { - sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SCROLLED); - mIsPending = false; - } - } - /** - *

- * This class represents a delegate that can be registered in a {@link View} - * to enhance accessibility support via composition rather via inheritance. - * It is specifically targeted to widget developers that extend basic View - * classes i.e. classes in package android.view, that would like their - * applications to be backwards compatible. - *

- *

- * A scenario in which a developer would like to use an accessibility delegate - * is overriding a method introduced in a later API version then the minimal API - * version supported by the application. For example, the method - * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} is not available - * in API version 4 when the accessibility APIs were first introduced. If a - * developer would like his application to run on API version 4 devices (assuming - * all other APIs used by the application are version 4 or lower) and take advantage - * of this method, instead of overriding the method which would break the application's - * backwards compatibility, he can override the corresponding method in this - * delegate and register the delegate in the target View if the API version of - * the system is high enough i.e. the API version is same or higher to the API - * version that introduced - * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)}. - *

- *

- * Here is an example implementation: - *

- * 

-     * if (Build.VERSION.SDK_INT >= 14) {
-     *     // If the API version is equal of higher than the version in
-     *     // which onInitializeAccessibilityNodeInfo was introduced we
-     *     // register a delegate with a customized implementation.
-     *     View view = findViewById(R.id.view_id);
-     *     view.setAccessibilityDelegate(new AccessibilityDelegate() {
-     *         public void onInitializeAccessibilityNodeInfo(View host,
-     *                 AccessibilityNodeInfo info) {
-     *             // Let the default implementation populate the info.
-     *             super.onInitializeAccessibilityNodeInfo(host, info);
-     *             // Set some other information.
-     *             info.setEnabled(host.isEnabled());
-     *         }
-     *     });
-     * }
-     *

- *

- * This delegate contains methods that correspond to the accessibility methods - * in View. If a delegate has been specified the implementation in View hands - * off handling to the corresponding method in this delegate. The default - * implementation the delegate methods behaves exactly as the corresponding - * method in View for the case of no accessibility delegate been set. Hence, - * to customize the behavior of a View method, clients can override only the - * corresponding delegate method without altering the behavior of the rest - * accessibility related methods of the host view. - *

- */ - public static class AccessibilityDelegate { - /** - * Sends an accessibility event of the given type. If accessibility is not - * enabled this method has no effect. - *

- * The default implementation behaves as {@link View#sendAccessibilityEvent(int) - * View#sendAccessibilityEvent(int)} for the case of no accessibility delegate - * been set. - *

- * - * @param host The View hosting the delegate. - * @param eventType The type of the event to send. - * - * @see View#sendAccessibilityEvent(int) View#sendAccessibilityEvent(int) - */ - public void sendAccessibilityEvent(View host, int eventType) { - host.sendAccessibilityEventInternal(eventType); - } - /** - * Sends an accessibility event. This method behaves exactly as - * {@link #sendAccessibilityEvent(View, int)} but takes as an argument an - * empty {@link AccessibilityEvent} and does not perform a check whether - * accessibility is enabled. - *

- * The default implementation behaves as - * {@link View#sendAccessibilityEventUnchecked(AccessibilityEvent) - * View#sendAccessibilityEventUnchecked(AccessibilityEvent)} for - * the case of no accessibility delegate been set. - *

- * - * @param host The View hosting the delegate. - * @param event The event to send. - * - * @see View#sendAccessibilityEventUnchecked(AccessibilityEvent) - * View#sendAccessibilityEventUnchecked(AccessibilityEvent) - */ - public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event) { - host.sendAccessibilityEventUncheckedInternal(event); - } - /** - * Dispatches an {@link AccessibilityEvent} to the host {@link View} first and then - * to its children for adding their text content to the event. - *

- * The default implementation behaves as - * {@link View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) - * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent)} for - * the case of no accessibility delegate been set. - *

- * - * @param host The View hosting the delegate. - * @param event The event. - * @return True if the event population was completed. - * - * @see View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) - * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) - */ - public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) { - return host.dispatchPopulateAccessibilityEventInternal(event); - } - /** - * Gives a chance to the host View to populate the accessibility event with its - * text content. - *

- * The default implementation behaves as - * {@link View#onPopulateAccessibilityEvent(AccessibilityEvent) - * View#onPopulateAccessibilityEvent(AccessibilityEvent)} for - * the case of no accessibility delegate been set. - *

- * - * @param host The View hosting the delegate. - * @param event The accessibility event which to populate. - * - * @see View#onPopulateAccessibilityEvent(AccessibilityEvent) - * View#onPopulateAccessibilityEvent(AccessibilityEvent) - */ - public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { - host.onPopulateAccessibilityEventInternal(event); - } - /** - * Initializes an {@link AccessibilityEvent} with information about the - * the host View which is the event source. - *

- * The default implementation behaves as - * {@link View#onInitializeAccessibilityEvent(AccessibilityEvent) - * View#onInitializeAccessibilityEvent(AccessibilityEvent)} for - * the case of no accessibility delegate been set. - *

- * - * @param host The View hosting the delegate. - * @param event The event to initialize. - * - * @see View#onInitializeAccessibilityEvent(AccessibilityEvent) - * View#onInitializeAccessibilityEvent(AccessibilityEvent) - */ - public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { - host.onInitializeAccessibilityEventInternal(event); - } - /** - * Initializes an {@link AccessibilityNodeInfo} with information about the host view. - *

- * The default implementation behaves as - * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) - * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} for - * the case of no accessibility delegate been set. - *

- * - * @param host The View hosting the delegate. - * @param info The instance to initialize. - * - * @see View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) - * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) - */ - public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { - host.onInitializeAccessibilityNodeInfoInternal(info); - } - /** - * Called when a child of the host View has requested sending an - * {@link AccessibilityEvent} and gives an opportunity to the parent (the host) - * to augment the event. - *

- * The default implementation behaves as - * {@link ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) - * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent)} for - * the case of no accessibility delegate been set. - *

- * - * @param host The View hosting the delegate. - * @param child The child which requests sending the event. - * @param event The event to be sent. - * @return True if the event should be sent - * - * @see ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) - * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) - */ - public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child, - AccessibilityEvent event) { - return host.onRequestSendAccessibilityEventInternal(child, event); - } - /** - * Gets the provider for managing a virtual view hierarchy rooted at this View - * and reported to {@link android.accessibilityservice.AccessibilityService}s - * that explore the window content. - *

- * The default implementation behaves as - * {@link View#getAccessibilityNodeProvider() View#getAccessibilityNodeProvider()} for - * the case of no accessibility delegate been set. - *

- * - * @return The provider. - * - * @see AccessibilityNodeProvider - */ - public AccessibilityNodeProvider getAccessibilityNodeProvider(View host) { - return null; - } - } -} diff --git a/src/test/resources/test_candidates/ch_8_classes/sec_8_4_method_declarations/sec_8_4_3_method_modifiers/sec_8_4_3_4_native_methods/SimpleNativeMethod.java b/src/test/resources/test_candidates/ch_8_classes/sec_8_4_method_declarations/sec_8_4_3_method_modifiers/sec_8_4_3_4_native_methods/SimpleNativeMethod.java index bf221900..4cac7faa 100644 --- a/src/test/resources/test_candidates/ch_8_classes/sec_8_4_method_declarations/sec_8_4_3_method_modifiers/sec_8_4_3_4_native_methods/SimpleNativeMethod.java +++ b/src/test/resources/test_candidates/ch_8_classes/sec_8_4_method_declarations/sec_8_4_3_method_modifiers/sec_8_4_3_4_native_methods/SimpleNativeMethod.java @@ -1,9 +1,11 @@ +// @todo #165:90m method() is left for the future + public class SimpleNativeMethod { static native void method(); public static void main(String[] args) { - //method(); TODO: I leave it for the future + //method(); System.out.println("passed"); } } diff --git a/src/test/resources/test_ready/ch_8_classes/sec_8_4_method_declarations/sec_8_4_3_method_modifiers/sec_8_4_3_4_native_methods/SampleTest.java b/src/test/resources/test_ready/ch_8_classes/sec_8_4_method_declarations/sec_8_4_3_method_modifiers/sec_8_4_3_4_native_methods/SampleTest.java index bf221900..d080780c 100644 --- a/src/test/resources/test_ready/ch_8_classes/sec_8_4_method_declarations/sec_8_4_3_method_modifiers/sec_8_4_3_4_native_methods/SampleTest.java +++ b/src/test/resources/test_ready/ch_8_classes/sec_8_4_method_declarations/sec_8_4_3_method_modifiers/sec_8_4_3_4_native_methods/SampleTest.java @@ -1,9 +1,10 @@ +// @todo #165:90m method() is left for the future public class SimpleNativeMethod { static native void method(); public static void main(String[] args) { - //method(); TODO: I leave it for the future + //method(); System.out.println("passed"); } }