diff --git a/.gitignore b/.gitignore
new file mode 100755
index 0000000..9011bee
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,12 @@
+*.iml
+*~
+.DS_Store
+.gradle
+.idea
+.idea/uiDesigner.xml
+.idea/workspace.xml
+/.idea/libraries
+/.idea/workspace.xml
+build
+local.properties
+target
diff --git a/app/build.gradle b/app/build.gradle
new file mode 100755
index 0000000..3049222
--- /dev/null
+++ b/app/build.gradle
@@ -0,0 +1,30 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 22
+    buildToolsVersion '22.0.1'
+
+    sourceSets {
+      // main.res.srcDir += 'src/main/buttons'
+    }
+
+    defaultConfig {
+        applicationId "reinardcox.c4q.nyc.calculator"
+        minSdkVersion 15
+        targetSdkVersion 22
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile 'com.android.support:appcompat-v7:22.1.1'
+    compile files('libs/jep-2.23.jar')
+}
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
new file mode 100755
index 0000000..17da285
--- /dev/null
+++ b/app/proguard-rules.pro
@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in C:\Users\Shadow\AppData\Local\Android\sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# 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 *;
+#}
diff --git a/app/src/androidTest/java/reinardcox/c4q/nyc/calculator/ApplicationTest.java b/app/src/androidTest/java/reinardcox/c4q/nyc/calculator/ApplicationTest.java
new file mode 100755
index 0000000..823103a
--- /dev/null
+++ b/app/src/androidTest/java/reinardcox/c4q/nyc/calculator/ApplicationTest.java
@@ -0,0 +1,13 @@
+package reinardcox.c4q.nyc.calculator;
+
+import android.app.Application;
+import android.test.ApplicationTestCase;
+
+/**
+ * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
+ */
+public class ApplicationTest extends ApplicationTestCase<Application> {
+    public ApplicationTest() {
+        super(Application.class);
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
new file mode 100755
index 0000000..d572c02
--- /dev/null
+++ b/app/src/main/AndroidManifest.xml
@@ -0,0 +1,21 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="reinardcox.c4q.nyc.calculator">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme">
+        <!-- Add activity tags -->
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name">
+            <!-- Add the intent filter -->
+            <intent-filter>
+                <!-- Action.Main/Category.Launcher -->
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/app/src/main/buttons/drawable/Instagram.png b/app/src/main/buttons/drawable/Instagram.png
new file mode 100755
index 0000000..c4d93ba
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diff --git a/app/src/main/java/reinardcox/c4q/nyc/calculator/MainActivity.java b/app/src/main/java/reinardcox/c4q/nyc/calculator/MainActivity.java
new file mode 100755
index 0000000..6d0bd39
--- /dev/null
+++ b/app/src/main/java/reinardcox/c4q/nyc/calculator/MainActivity.java
@@ -0,0 +1,320 @@
+package reinardcox.c4q.nyc.calculator;
+
+import android.os.Bundle;
+import android.os.PersistableBundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import org.nfunk.jep.JEP;
+
+import java.util.Collection;
+
+/**
+ * Created by Shadow on 5/20/2015.
+ */
+public class MainActivity extends AppCompatActivity {
+
+    //Create a onCreate method
+    // TextView window;
+
+
+
+    String [] listOfthings = {"-","+","*", "/", "%"};
+
+    Button zero, one, two, three, four, five, six, seven, eight, nine, period, equal, plus, minus,
+            times, divide, clear, percentage, openPen, closePen, log1;
+    String memoryBank = "";
+    TextView reader;
+    boolean ticker = false, tickerPeriod = false;
+
+    public static boolean endsWithAnyOf(String s, String[] listOfStrings){
+        boolean valid = false;
+        for (String ending : listOfStrings){
+            if (s.endsWith(ending))
+                valid = true;
+        }
+        return valid;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        //Set Content View
+        setContentView(R.layout.main_layout);
+
+        reader = (TextView) findViewById(R.id.reader_id);
+
+        zero = (Button) findViewById(R.id.zero_id);
+        one = (Button) findViewById(R.id.one_id);
+        two = (Button) findViewById(R.id.two_id);
+        three = (Button) findViewById(R.id.three_id);
+        four = (Button) findViewById(R.id.four_id);
+        five = (Button) findViewById(R.id.five_id);
+        six = (Button) findViewById(R.id.six_id);
+        seven = (Button) findViewById(R.id.seven_id);
+        eight = (Button) findViewById(R.id.eight_id);
+        nine = (Button) findViewById(R.id.nine_id);
+
+        period = (Button) findViewById(R.id.peroid_id);
+        equal = (Button) findViewById(R.id.equal_id);
+        plus = (Button) findViewById(R.id.plus_id);
+        minus = (Button) findViewById(R.id.minus_id);
+        times = (Button) findViewById(R.id.times_id);
+        divide = (Button) findViewById(R.id.divide_id);
+        clear = (Button) findViewById(R.id.clear_id);
+        percentage = (Button) findViewById(R.id.percentage_id);
+        openPen = (Button) findViewById(R.id.openPen_id);
+        closePen = (Button) findViewById(R.id.closePen_id);
+
+        log1 = (Button) findViewById(R.id.log_id);
+
+
+        if (savedInstanceState == null) {
+            memoryBank = "";
+        } else {
+            memoryBank = savedInstanceState.getString("memoryBank");
+            reader.setText(memoryBank);
+        }
+
+        zero.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "0";
+                reader.setText(memoryBank);
+            }
+        });
+
+        one.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "1";
+                reader.setText(memoryBank);
+            }
+        });
+
+        two.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "2";
+                reader.setText(memoryBank);
+            }
+        });
+
+        three.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "3";
+                reader.setText(memoryBank);
+            }
+        });
+
+        four.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "4";
+                reader.setText(memoryBank);
+            }
+        });
+
+        five.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "5";
+                reader.setText(memoryBank);
+            }
+        });
+
+        six.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "6";
+                reader.setText(memoryBank);
+            }
+        });
+
+        seven.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "7";
+                reader.setText(memoryBank);
+            }
+        });
+
+        eight.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "8";
+                reader.setText(memoryBank);
+            }
+        });
+
+        nine.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "9";
+                reader.setText(memoryBank);
+            }
+        });
+
+        openPen.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += "(";
+                reader.setText(memoryBank);
+            }
+        });
+
+        closePen.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                check();
+                memoryBank += ")";
+                reader.setText(memoryBank);
+            }
+        });
+
+        percentage.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+//                    if (!memoryBank.endsWith("%")) {
+                if (!endsWithAnyOf(memoryBank, listOfthings)){
+                    check();
+                    memoryBank += "%";
+                    reader.setText(memoryBank);
+                }
+            }
+        });
+
+        divide.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+//                if (!memoryBank.endsWith("/")) {
+                if (!endsWithAnyOf(memoryBank, listOfthings)){
+                    ticker = false;
+                    memoryBank += "/";
+                    reader.setText(memoryBank);
+                }
+            }
+        });
+
+        times.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+//                if (!memoryBank.endsWith("*")) {
+
+                if (!endsWithAnyOf(memoryBank, listOfthings)){
+                    ticker = false;
+                    memoryBank += "*";
+                    reader.setText(memoryBank);
+                }
+            }
+        });
+
+
+        minus.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+//                if (!memoryBank.endsWith("-")) {
+
+                if (!endsWithAnyOf(memoryBank, listOfthings)){
+                    ticker = false;
+                    memoryBank += "-";
+                    reader.setText(memoryBank);
+                }
+            }
+        });
+
+        plus.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+//                if (!memoryBank.endsWith("+")) {
+
+                if (!endsWithAnyOf(memoryBank, listOfthings)){
+                    ticker = false;
+                    memoryBank += "+";
+                    reader.setText(memoryBank);
+                }
+            }
+        });
+
+        clear.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                memoryBank = "";
+                reader.setText(memoryBank);
+            }
+        });
+
+        period.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if(!memoryBank.endsWith(".")) {
+                    check();
+                    memoryBank += ".";
+                    reader.setText(memoryBank);
+                }
+            }
+        });
+
+        if (log1 != null) {
+            log1.setOnClickListener(new View.OnClickListener() {
+
+
+                @Override
+                public void onClick(View v) {
+                    check();
+                    memoryBank += "log(";
+                    reader.setText(memoryBank);
+                }
+            });
+        }
+
+        equal.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+                JEP myParser = new JEP();
+                myParser.parseExpression(memoryBank);
+                memoryBank = myParser.getValue() + "";
+                reader.setText(memoryBank);
+
+                ticker = true;
+
+            }
+        });
+
+
+    }
+
+    public void check (){
+        if (ticker !=false) {
+            memoryBank = "";
+            reader.setText(memoryBank);
+            ticker = false;
+        }
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle saveInstanceState) {
+        super.onSaveInstanceState(saveInstanceState);
+        saveInstanceState.putString("memoryBank", memoryBank);
+    }
+}
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Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/times_up.9.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/tt_down.9.png b/app/src/main/res/drawable-xxxhdpi/tt_down.9.png
new file mode 100755
index 0000000..91492da
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/tt_down.9.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/tt_up.9.png b/app/src/main/res/drawable-xxxhdpi/tt_up.9.png
new file mode 100755
index 0000000..c04193d
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/tt_up.9.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/xx_down.9.png b/app/src/main/res/drawable-xxxhdpi/xx_down.9.png
new file mode 100755
index 0000000..9d3d9b2
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/xx_down.9.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/xx_up.9.png b/app/src/main/res/drawable-xxxhdpi/xx_up.9.png
new file mode 100755
index 0000000..3764ecd
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/xx_up.9.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/xy_down.9.png b/app/src/main/res/drawable-xxxhdpi/xy_down.9.png
new file mode 100755
index 0000000..7a45e83
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/xy_down.9.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/xy_up.9.png b/app/src/main/res/drawable-xxxhdpi/xy_up.9.png
new file mode 100755
index 0000000..3a80b91
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/xy_up.9.png differ
diff --git a/app/src/main/res/drawable/ans_button.xml b/app/src/main/res/drawable/ans_button.xml
new file mode 100755
index 0000000..b162eb9
--- /dev/null
+++ b/app/src/main/res/drawable/ans_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/ans_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/ans_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/ans_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/background_picture.png b/app/src/main/res/drawable/background_picture.png
new file mode 100755
index 0000000..ef1a536
Binary files /dev/null and b/app/src/main/res/drawable/background_picture.png differ
diff --git a/app/src/main/res/drawable/ce_button.xml b/app/src/main/res/drawable/ce_button.xml
new file mode 100755
index 0000000..21cf845
--- /dev/null
+++ b/app/src/main/res/drawable/ce_button.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/ce_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/ce_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/ce_up" />
+
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/check_button.xml b/app/src/main/res/drawable/check_button.xml
new file mode 100755
index 0000000..d22737d
--- /dev/null
+++ b/app/src/main/res/drawable/check_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/check_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/check_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/check_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/close_pen_button.xml b/app/src/main/res/drawable/close_pen_button.xml
new file mode 100755
index 0000000..3fb1ab6
--- /dev/null
+++ b/app/src/main/res/drawable/close_pen_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/close_pen_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/close_pen_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/close_pen_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/cos_button.xml b/app/src/main/res/drawable/cos_button.xml
new file mode 100755
index 0000000..3bc1348
--- /dev/null
+++ b/app/src/main/res/drawable/cos_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/cos_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/cos_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/cos_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_0_button.xml b/app/src/main/res/drawable/custom_0_button.xml
new file mode 100755
index 0000000..5b7af97
--- /dev/null
+++ b/app/src/main/res/drawable/custom_0_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_0_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_0_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_0_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_1_button.xml b/app/src/main/res/drawable/custom_1_button.xml
new file mode 100755
index 0000000..5d1d373
--- /dev/null
+++ b/app/src/main/res/drawable/custom_1_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_1_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_1_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_1_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_2_button.xml b/app/src/main/res/drawable/custom_2_button.xml
new file mode 100755
index 0000000..b00e19d
--- /dev/null
+++ b/app/src/main/res/drawable/custom_2_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_2_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_2_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_2_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_3_button.xml b/app/src/main/res/drawable/custom_3_button.xml
new file mode 100755
index 0000000..57e8849
--- /dev/null
+++ b/app/src/main/res/drawable/custom_3_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_3_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_3_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_3_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_4_button.xml b/app/src/main/res/drawable/custom_4_button.xml
new file mode 100755
index 0000000..7bcd8a4
--- /dev/null
+++ b/app/src/main/res/drawable/custom_4_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_4_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_4_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_4_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_5_button.xml b/app/src/main/res/drawable/custom_5_button.xml
new file mode 100755
index 0000000..f5fb6b7
--- /dev/null
+++ b/app/src/main/res/drawable/custom_5_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_5_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_5_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_5_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_6_button.xml b/app/src/main/res/drawable/custom_6_button.xml
new file mode 100755
index 0000000..21c1319
--- /dev/null
+++ b/app/src/main/res/drawable/custom_6_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_6_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_6_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_6_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_8_button.xml b/app/src/main/res/drawable/custom_8_button.xml
new file mode 100755
index 0000000..16f9da9
--- /dev/null
+++ b/app/src/main/res/drawable/custom_8_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_8_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_8_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_8_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_9_button.xml b/app/src/main/res/drawable/custom_9_button.xml
new file mode 100755
index 0000000..b934502
--- /dev/null
+++ b/app/src/main/res/drawable/custom_9_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_9_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_9_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_9_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/custom_button_7.xml b/app/src/main/res/drawable/custom_button_7.xml
new file mode 100755
index 0000000..8b5467f
--- /dev/null
+++ b/app/src/main/res/drawable/custom_button_7.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/custom_7_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/custom_7_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/custom_7_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/deg_button.xml b/app/src/main/res/drawable/deg_button.xml
new file mode 100755
index 0000000..498b159
--- /dev/null
+++ b/app/src/main/res/drawable/deg_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/deg_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/deg_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/deg_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/divide_button.xml b/app/src/main/res/drawable/divide_button.xml
new file mode 100755
index 0000000..6026f2d
--- /dev/null
+++ b/app/src/main/res/drawable/divide_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/divide_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/divide_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/divide_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/e_button.xml b/app/src/main/res/drawable/e_button.xml
new file mode 100755
index 0000000..58acab8
--- /dev/null
+++ b/app/src/main/res/drawable/e_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/e_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/e_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/e_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/equal_button.xml b/app/src/main/res/drawable/equal_button.xml
new file mode 100755
index 0000000..3a5de3d
--- /dev/null
+++ b/app/src/main/res/drawable/equal_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/equal_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/equal_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/equal_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/exp_button.xml b/app/src/main/res/drawable/exp_button.xml
new file mode 100755
index 0000000..48521d8
--- /dev/null
+++ b/app/src/main/res/drawable/exp_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/exp_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/exp_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/exp_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/inv_button.xml b/app/src/main/res/drawable/inv_button.xml
new file mode 100755
index 0000000..9a152ed
--- /dev/null
+++ b/app/src/main/res/drawable/inv_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/inv_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/inv_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/inv_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/ln_button.xml b/app/src/main/res/drawable/ln_button.xml
new file mode 100755
index 0000000..9d38f49
--- /dev/null
+++ b/app/src/main/res/drawable/ln_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/ln_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/ln_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/ln_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/log_button.xml b/app/src/main/res/drawable/log_button.xml
new file mode 100755
index 0000000..4f6394c
--- /dev/null
+++ b/app/src/main/res/drawable/log_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/log_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/log_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/log_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/open_pen_button.xml b/app/src/main/res/drawable/open_pen_button.xml
new file mode 100755
index 0000000..fb7086a
--- /dev/null
+++ b/app/src/main/res/drawable/open_pen_button.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!-- custom made button 1 -->
+    <item android:drawable="@drawable/open_pen_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/open_pen_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/open_pen_up" />
+
+
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/percentage_button.xml b/app/src/main/res/drawable/percentage_button.xml
new file mode 100755
index 0000000..e59b891
--- /dev/null
+++ b/app/src/main/res/drawable/percentage_button.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/percentage_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/percentage_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/percentage_up" />
+
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/plus_button.xml b/app/src/main/res/drawable/plus_button.xml
new file mode 100755
index 0000000..e210757
--- /dev/null
+++ b/app/src/main/res/drawable/plus_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/plus_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/plus_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/plus_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/point_button.xml b/app/src/main/res/drawable/point_button.xml
new file mode 100755
index 0000000..6c3bb73
--- /dev/null
+++ b/app/src/main/res/drawable/point_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/point_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/point_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/point_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/rad_button.xml b/app/src/main/res/drawable/rad_button.xml
new file mode 100755
index 0000000..b35bcca
--- /dev/null
+++ b/app/src/main/res/drawable/rad_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/rad_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/rad_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/rad_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/sin_button.xml b/app/src/main/res/drawable/sin_button.xml
new file mode 100755
index 0000000..bddc403
--- /dev/null
+++ b/app/src/main/res/drawable/sin_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/sin_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/sin_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/sin_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/subtract_button.xml b/app/src/main/res/drawable/subtract_button.xml
new file mode 100755
index 0000000..621a322
--- /dev/null
+++ b/app/src/main/res/drawable/subtract_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/subtract_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/subtract_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/subtract_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/tan_button.xml b/app/src/main/res/drawable/tan_button.xml
new file mode 100755
index 0000000..62f18d1
--- /dev/null
+++ b/app/src/main/res/drawable/tan_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/tan_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/tan_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/tan_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/times_button.xml b/app/src/main/res/drawable/times_button.xml
new file mode 100755
index 0000000..4166b24
--- /dev/null
+++ b/app/src/main/res/drawable/times_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/times_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/times_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/times_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/tt_button.xml b/app/src/main/res/drawable/tt_button.xml
new file mode 100755
index 0000000..9428674
--- /dev/null
+++ b/app/src/main/res/drawable/tt_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/tt_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/tt_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/tt_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/xx_button.xml b/app/src/main/res/drawable/xx_button.xml
new file mode 100755
index 0000000..0fce826
--- /dev/null
+++ b/app/src/main/res/drawable/xx_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/xx_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/xx_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/xx_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/xy_button.xml b/app/src/main/res/drawable/xy_button.xml
new file mode 100755
index 0000000..e434520
--- /dev/null
+++ b/app/src/main/res/drawable/xy_button.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/xy_down"
+        android:state_pressed="true" />
+    <item android:drawable="@drawable/xy_up"
+        android:state_focused="true" />
+    <item android:drawable="@drawable/xy_up" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/layout-land/main_layout.xml b/app/src/main/res/layout-land/main_layout.xml
new file mode 100755
index 0000000..4d3057c
--- /dev/null
+++ b/app/src/main/res/layout-land/main_layout.xml
@@ -0,0 +1,384 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:background="#ff121016"
+        android:orientation="vertical"
+        android:padding="10dp">
+
+
+        <TextView
+            android:id="@id/reader_id"
+            android:layout_width="fill_parent"
+            android:layout_height="fill_parent"
+            android:layout_gravity="center"
+            android:background="#ffffffff"
+            android:gravity="right|bottom"
+            android:hint="0"
+            android:textSize="40dp" />
+
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:layout_weight="20"
+        android:background="#ff121016"
+        android:orientation="horizontal">
+
+        <!-- added -->
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/rad_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/inv_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/tt_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/e_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/ans_button" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/deg_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/sin_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/cos_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/tan_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/exp_button" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/xx_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/ln_button" />
+
+            <Button
+                android:id="@+id/log_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/log_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/check_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/xy_button" />
+        </LinearLayout>
+
+        <!-- end -->
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+                android:id="@id/openPen_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/open_pen_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+android:id="@id/seven_id"
+                android:layout_weight="1"
+                android:background="@drawable/custom_button_7" />
+
+            <Button
+                android:id="@id/four_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_4_button" />
+
+            <Button
+                android:id="@id/one_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_1_button" />
+
+            <Button
+                android:id="@id/zero_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_0_button" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+                android:id="@id/closePen_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/close_pen_button" />
+
+            <Button
+                android:id="@id/eight_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_8_button" />
+
+            <Button
+                android:id="@id/five_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_5_button" />
+
+            <Button
+                android:id="@id/two_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_2_button" />
+
+            <Button
+                android:id="@id/peroid_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/point_button" />
+
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+android:id="@id/percentage_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/percentage_button" />
+
+            <Button
+android:id="@id/nine_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_9_button" />
+
+            <Button
+android:id="@id/six_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_6_button" />
+
+            <Button
+                android:id="@id/three_id"
+
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_3_button" />
+
+            <Button
+                android:id="@id/equal_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/equal_button" />
+
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+android:id="@id/clear_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/ce_button" />
+
+            <Button
+android:id="@id/divide_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/divide_button" />
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+android:id="@id/times_id"
+                android:layout_weight="1"
+                android:background="@drawable/times_button" />
+
+            <Button
+android:id="@id/minus_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/subtract_button" />
+
+            <Button
+                android:id="@id/plus_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/plus_button" />
+
+
+        </LinearLayout>
+
+
+    </LinearLayout>
+
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/main_layout.xml b/app/src/main/res/layout/main_layout.xml
new file mode 100755
index 0000000..fd2036d
--- /dev/null
+++ b/app/src/main/res/layout/main_layout.xml
@@ -0,0 +1,261 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+
+    >
+
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:background="#ff121016"
+        android:orientation="vertical"
+        android:padding="10dp">
+
+        <ImageView
+
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_weight="1"
+            android:src="@drawable/bar" />
+
+        <TextView
+            android:id="@+id/reader_id"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_weight="3"
+            android:background="#ffffffff"
+            android:gravity="right|bottom"
+            android:hint="0"
+            android:textSize="90dp" />
+
+        <ImageView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_weight="1"
+            android:src="@drawable/bar" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:background="#ff121016"
+        android:orientation="horizontal">
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+                android:id="@+id/openPen_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/open_pen_button" />
+
+            <Button
+                android:id="@+id/seven_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_button_7" />
+
+            <Button
+                android:id="@+id/four_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_4_button" />
+
+            <Button
+                android:id="@+id/one_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_1_button" />
+
+            <Button
+                android:id="@+id/zero_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_0_button" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+                android:id="@+id/closePen_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/close_pen_button" />
+
+            <Button
+                android:id="@+id/eight_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_8_button" />
+
+            <Button
+                android:id="@+id/five_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_5_button" />
+
+            <Button
+                android:id="@+id/two_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+
+                android:layout_weight="1"
+                android:background="@drawable/custom_2_button" />
+
+            <Button
+                android:id="@+id/peroid_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/point_button" />
+
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+
+                android:id="@+id/percentage_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/percentage_button" />
+
+            <Button
+
+                android:id="@+id/nine_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_9_button" />
+
+            <Button
+
+                android:id="@+id/six_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_6_button" />
+
+            <Button
+
+                android:id="@+id/three_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/custom_3_button" />
+
+            <Button
+                android:id="@+id/equal_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/equal_button" />
+
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+
+                android:id="@+id/clear_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/ce_button" />
+
+            <Button
+
+                android:id="@+id/divide_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/divide_button" />
+
+            <Button
+                android:id="@+id/times_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/times_button" />
+
+            <Button
+                android:id="@+id/minus_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/subtract_button" />
+
+            <Button
+                android:id="@+id/plus_id"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_weight="1"
+                android:background="@drawable/plus_button" />
+
+
+        </LinearLayout>
+
+
+    </LinearLayout>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/mipmap-hdpi/Thumbs.db b/app/src/main/res/mipmap-hdpi/Thumbs.db
new file mode 100755
index 0000000..6610687
Binary files /dev/null and b/app/src/main/res/mipmap-hdpi/Thumbs.db differ
diff --git a/app/src/main/res/mipmap-hdpi/ic_launcher.png b/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100755
index 0000000..ac5aec9
Binary files /dev/null and b/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-mdpi/Thumbs.db b/app/src/main/res/mipmap-mdpi/Thumbs.db
new file mode 100755
index 0000000..beabbdb
Binary files /dev/null and b/app/src/main/res/mipmap-mdpi/Thumbs.db differ
diff --git a/app/src/main/res/mipmap-mdpi/ic_launcher.png b/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100755
index 0000000..238c8c5
Binary files /dev/null and b/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xhdpi/Thumbs.db b/app/src/main/res/mipmap-xhdpi/Thumbs.db
new file mode 100755
index 0000000..025052b
Binary files /dev/null and b/app/src/main/res/mipmap-xhdpi/Thumbs.db differ
diff --git a/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100755
index 0000000..09085ba
Binary files /dev/null and b/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/mipmap-xxhdpi/Thumbs.db b/app/src/main/res/mipmap-xxhdpi/Thumbs.db
new file mode 100755
index 0000000..9570401
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diff --git a/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100755
index 0000000..92d44f4
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diff --git a/app/src/main/res/mipmap-xxxhdpi/Thumbs.db b/app/src/main/res/mipmap-xxxhdpi/Thumbs.db
new file mode 100755
index 0000000..41e2fc8
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diff --git a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100755
index 0000000..23cab82
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diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
new file mode 100755
index 0000000..efdeb92
--- /dev/null
+++ b/app/src/main/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Calculator</string>
+</resources>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
new file mode 100755
index 0000000..084b42b
--- /dev/null
+++ b/app/src/main/res/values/styles.xml
@@ -0,0 +1,8 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+    </style>
+
+</resources>
diff --git a/build.gradle b/build.gradle
new file mode 100755
index 0000000..80003fb
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,19 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:1.2.3'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100755
index 0000000..8c0fb64
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100755
index 0000000..0c71e76
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Wed Apr 10 15:27:10 PDT 2013
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..91a7e26
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,164 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched.
+if $cygwin ; then
+    [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+fi
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >&-
+APP_HOME="`pwd -P`"
+cd "$SAVED" >&-
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100755
index 0000000..aec9973
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100755
index 0000000..d3db109
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+include ':app'