sample: Add baseline project

Signed-off-by: Harsh Shandilya <[email protected]>

build.gradle

@@ -46,6 +46,13 @@ subprojects {
             sourceCompatibility = JavaVersion.VERSION_1_8
             targetCompatibility = JavaVersion.VERSION_1_8
         }
+        sourceSets {
+            main {
+                java {
+                    srcDirs 'src/main/kotlin'
+                }
+            }
+        }
     }
     tasks.withType(JavaCompile) {
         options.compilerArgs << '-Xlint:unchecked'
@@ -55,7 +62,6 @@ subprojects {
     tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile) {
         kotlinOptions {
             jvmTarget = '1.8'
-            freeCompilerArgs += '-XXLanguage:+NewInference'
         }
     }
 }

library/build.gradle

@@ -5,13 +5,6 @@
 apply plugin: 'com.android.library'
 
 android {
-    sourceSets {
-        main {
-            java {
-                srcDirs 'src/main/kotlin'
-            }
-        }
-    }
     buildTypes {
         release {
             minifyEnabled false

sample/build.gradle

@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2019 Harsh Shandilya <[email protected]>. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-Only
+ */
+apply plugin: 'kotlin-android'
+
+android {
+    defaultConfig {
+        applicationId "openpgpktx.sample"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation project(':library')
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.core:core-ktx:1.1.0'
+    implementation 'androidx.preference:preference:1.1.0'
+}

sample/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

sample/src/main/AndroidManifest.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="openpgpktx.sample">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity
+            android:name=".SettingsActivity"
+            android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

sample/src/main/kotlin/openpgpktx/sample/SettingsActivity.kt

@@ -0,0 +1,53 @@
+/*
+ * Copyright © 2019 Harsh Shandilya <[email protected]>. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-Only
+ */
+package openpgpktx.sample
+
+import android.os.Bundle
+import android.view.MenuItem
+import androidx.appcompat.app.AppCompatActivity
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.PreferenceManager
+import openpgpktx.sample.preference.OpenPgpAppPreference
+
+class SettingsActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.settings_activity)
+        supportFragmentManager
+            .beginTransaction()
+            .replace(R.id.settings, SettingsFragment())
+            .commit()
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return when (item.itemId) {
+            android.R.id.home -> {
+                finish()
+                true
+            }
+            else -> super.onOptionsItemSelected(item)
+        }
+    }
+
+    class SettingsFragment : PreferenceFragmentCompat() {
+        override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+            setPreferencesFromResource(R.xml.root_preferences, rootKey)
+            val prefs = PreferenceManager.getDefaultSharedPreferences(requireContext())
+
+            findPreference<OpenPgpAppPreference>("provider_app")?.apply {
+                value = prefs.getString("provider_app", "None")
+                summary = value
+                onPreferenceChangeListener = Preference.OnPreferenceChangeListener { _, newValue ->
+                    prefs.edit().putString("provider_app", newValue as String).apply()
+                    summary = newValue
+                    true
+                }
+            }
+        }
+    }
+}

sample/src/main/kotlin/openpgpktx/sample/model/OpenPgpProviderEntry.kt

@@ -0,0 +1,12 @@
+/*
+ * Copyright © 2019 Harsh Shandilya <[email protected]>. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-Only
+ */
+package openpgpktx.sample.model
+
+import android.content.Intent
+import android.graphics.drawable.Drawable
+
+data class OpenPgpProviderEntry(val packageName: String, val simpleName: String, val icon: Drawable? = null, val intent: Intent? = null) {
+    override fun toString(): String = simpleName
+}

sample/src/main/kotlin/openpgpktx/sample/preference/OpenPgpAppPreference.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright © 2019 Harsh Shandilya <[email protected]>. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-Only
+ */
+package openpgpktx.sample.preference
+
+import android.content.Context
+import android.util.AttributeSet
+import androidx.preference.ListPreference
+import openpgpktx.sample.util.ProviderUtils
+import openpgpktx.sample.util.getAttr
+
+class OpenPgpAppPreference @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = getAttr(context, androidx.preference.R.attr.dialogPreferenceStyle, android.R.attr.dialogPreferenceStyle),
+    defStyleRes: Int = 0
+) : ListPreference(context, attrs, defStyleAttr, defStyleRes) {
+    private val apps = ProviderUtils.getAppList(context)
+
+    override fun getEntries(): Array<CharSequence> {
+        return apps.map { it.simpleName }.toTypedArray()
+    }
+
+    override fun getEntryValues(): Array<CharSequence> {
+        return apps.map { it.packageName }.toTypedArray()
+    }
+
+}

sample/src/main/kotlin/openpgpktx/sample/util/ProviderUtils.kt

@@ -0,0 +1,71 @@
+/*
+ * Copyright © 2019 Harsh Shandilya <[email protected]>. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-Only
+ */
+package openpgpktx.sample.util
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import androidx.appcompat.content.res.AppCompatResources
+import openpgpktx.sample.R
+import openpgpktx.sample.model.OpenPgpProviderEntry
+
+object ProviderUtils {
+    private const val OPENKEYCHAIN_PACKAGE = "org.sufficientlysecure.keychain"
+    private const val MARKET_INTENT_URI_BASE = "market://details?id=%s"
+    private const val PACKAGE_NAME_APG = "org.thialfihar.android.apg"
+    private val PROVIDER_BLACKLIST = arrayOf(PACKAGE_NAME_APG)
+    private val MARKET_INTENT = Intent(Intent.ACTION_VIEW, Uri.parse(String.format(MARKET_INTENT_URI_BASE, OPENKEYCHAIN_PACKAGE)))
+
+    fun getAppList(context: Context): ArrayList<OpenPgpProviderEntry> {
+        val apps = ArrayList<OpenPgpProviderEntry>()
+
+        // Add the 'None' option
+        apps.add(0,
+            OpenPgpProviderEntry(
+                "",
+                "None",
+                AppCompatResources.getDrawable(context, android.R.drawable.sym_def_app_icon)
+            )
+        )
+
+        // Start searching for the real ones
+        val intent = Intent("org.openintents.openpgp.IOpenPgpService2")
+        var resInfo = context.packageManager.queryIntentServices(intent, 0)
+        for (resolveInfo in resInfo) {
+            resolveInfo.serviceInfo?.apply {
+                if (packageName in PROVIDER_BLACKLIST) return@apply
+                val simpleName = loadLabel(context.packageManager).toString()
+                val icon = loadIcon(context.packageManager)
+                apps.add(
+                    OpenPgpProviderEntry(
+                        packageName, simpleName, icon
+                    )
+                )
+            } ?: continue
+        }
+        if (apps.size == 1) {
+            resInfo = context.packageManager
+                .queryIntentActivities(MARKET_INTENT, 0)
+            for (resolveInfo in resInfo) {
+                resolveInfo.activityInfo?.apply {
+                    val marketIntent = Intent(MARKET_INTENT)
+                    marketIntent.setPackage(packageName)
+                    val icon = loadIcon(context.packageManager)
+                    val marketName = applicationInfo.loadLabel(context.packageManager).toString()
+                    val simpleName = String.format(
+                        context.getString(R.string.openpgp_install_openkeychain_via),
+                        marketName
+                    )
+                    apps.add(
+                        OpenPgpProviderEntry(
+                            OPENKEYCHAIN_PACKAGE, simpleName, icon, marketIntent
+                        )
+                    )
+                }
+            }
+        }
+        return apps
+    }
+}

sample/src/main/kotlin/openpgpktx/sample/util/TypedArrayUtils.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright © 2019 Harsh Shandilya <[email protected]>. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-Only
+ */
+package openpgpktx.sample.util
+
+import android.content.Context
+import android.util.TypedValue
+
+/**
+ * @return The resource ID value in the `context` specified by `attr`. If it does
+ * not exist, `fallbackAttr`.
+ */
+fun getAttr(context: Context, attr: Int, fallbackAttr: Int): Int {
+    val value = TypedValue()
+    context.theme.resolveAttribute(attr, value, true)
+    return if (value.resourceId != 0) {
+        attr
+    } else fallbackAttr
+}

sample/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>