Created CheckableLayout accessibility sample

Bug: 35802085
Change-Id: I914efeb351c242c570bcdd7e274957c7d9f60278

34 files changed, 726 insertions, 0 deletions

diff --git a/accessibility/CheckableLayout/Application/.gitignore b/accessibility/CheckableLayout/Application/.gitignore
new file mode 100644
index 00000000..6518621b
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/.gitignore
@@ -0,0 +1,14 @@
+# Copyright 2013 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.
+build.gradle
diff --git a/accessibility/CheckableLayout/Application/proguard-project.txt b/accessibility/CheckableLayout/Application/proguard-project.txt
new file mode 100644
index 00000000..f2fe1559
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/proguard-project.txt
@@ -0,0 +1,20 @@
+# To enable ProGuard in your project, edit project.properties
+# to define the proguard.config property as described in that file.
+#
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in ${sdk.dir}/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the ProGuard
+# include property in project.properties.
+#
+# 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/accessibility/CheckableLayout/Application/src/main/AndroidManifest.xml b/accessibility/CheckableLayout/Application/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..9488f0ab
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/AndroidManifest.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+     Copyright 2016 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.android.checkablelayout">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
diff --git a/accessibility/CheckableLayout/Application/src/main/java/com/example/android/checkablelayout/CheckableFrameLayout.java b/accessibility/CheckableLayout/Application/src/main/java/com/example/android/checkablelayout/CheckableFrameLayout.java
new file mode 100644
index 00000000..52da5551
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/java/com/example/android/checkablelayout/CheckableFrameLayout.java
@@ -0,0 +1,91 @@
+/*
+* Copyright (C) 2016 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 com.example.android.checkablelayout;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityNodeInfo;
+import android.widget.Checkable;
+import android.widget.FrameLayout;
+
+/**
+ * Simple wrapper for {@link FrameLayout} that implements the {@link Checkable}
+ * interface. Keeps an internal 'checked' state flag.
+ */
+public class CheckableFrameLayout extends FrameLayout implements Checkable {
+    private static final int[] CHECKED_STATE_SET = {
+            android.R.attr.state_activated,
+            android.R.attr.state_checked,
+    };
+
+    private boolean mChecked;
+
+    public CheckableFrameLayout(Context context) {
+        this(context, null, 0);
+    }
+
+    public CheckableFrameLayout(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public CheckableFrameLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        setFocusable(true);
+    }
+
+    @Override
+    protected int[] onCreateDrawableState(int extraSpace) {
+        final int[] drawableState = super.onCreateDrawableState(extraSpace + 2);
+        if (mChecked) {
+            mergeDrawableStates(drawableState, CHECKED_STATE_SET);
+        }
+        return drawableState;
+    }
+
+    @Override
+    public void setChecked(boolean checked) {
+        if (mChecked != checked) {
+            mChecked = checked;
+            sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
+            refreshDrawableState();
+        }
+    }
+
+    @Override
+    public boolean isChecked() {
+        return mChecked;
+    }
+
+    @Override
+    public void toggle() {
+        setChecked(!mChecked);
+    }
+
+    @Override
+    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
+        super.onInitializeAccessibilityNodeInfo(info);
+        info.setCheckable(true);
+        info.setChecked(isChecked());
+    }
+
+    @Override
+    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
+        super.onInitializeAccessibilityEvent(event);
+        event.setChecked(isChecked());
+    }
+}
\ No newline at end of file
diff --git a/accessibility/CheckableLayout/Application/src/main/java/com/example/android/checkablelayout/MainActivity.java b/accessibility/CheckableLayout/Application/src/main/java/com/example/android/checkablelayout/MainActivity.java
new file mode 100644
index 00000000..32b56495
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/java/com/example/android/checkablelayout/MainActivity.java
@@ -0,0 +1,39 @@
+/*
+* Copyright (C) 2016 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 com.example.android.checkablelayout;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+
+public class MainActivity extends AppCompatActivity {
+
+    private CheckableFrameLayout mFrameLayout;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        mFrameLayout = (CheckableFrameLayout) findViewById(R.id.frame_layout);
+        mFrameLayout.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                mFrameLayout.toggle();
+            }
+        });
+    }
+}
diff --git a/accessibility/CheckableLayout/Application/src/main/res/drawable-hdpi/ic_done_green.png b/accessibility/CheckableLayout/Application/src/main/res/drawable-hdpi/ic_done_green.png
new file mode 100755
index 00000000..9635fa5d
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/drawable-hdpi/ic_done_green.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/drawable-mdpi/ic_done_green.png b/accessibility/CheckableLayout/Application/src/main/res/drawable-mdpi/ic_done_green.png
new file mode 100755
index 00000000..383d125c
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/drawable-mdpi/ic_done_green.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/drawable-xhdpi/ic_done_green.png b/accessibility/CheckableLayout/Application/src/main/res/drawable-xhdpi/ic_done_green.png
new file mode 100755
index 00000000..9a50c661
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/drawable-xhdpi/ic_done_green.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/drawable-xxhdpi/ic_done_green.png b/accessibility/CheckableLayout/Application/src/main/res/drawable-xxhdpi/ic_done_green.png
new file mode 100755
index 00000000..23d2a335
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/drawable-xxhdpi/ic_done_green.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/drawable-xxxhdpi/ic_done_green.png b/accessibility/CheckableLayout/Application/src/main/res/drawable-xxxhdpi/ic_done_green.png
new file mode 100755
index 00000000..1f0c35ec
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/drawable-xxxhdpi/ic_done_green.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/drawable/birch_leaves.jpeg b/accessibility/CheckableLayout/Application/src/main/res/drawable/birch_leaves.jpeg
new file mode 100644
index 00000000..3e7d8462
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/drawable/birch_leaves.jpeg
diff --git a/accessibility/CheckableLayout/Application/src/main/res/drawable/ic_checkable_item.xml b/accessibility/CheckableLayout/Application/src/main/res/drawable/ic_checkable_item.xml
new file mode 100644
index 00000000..9b9d0b01
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/drawable/ic_checkable_item.xml
@@ -0,0 +1,15 @@
+<!--
+  Copyright 2016 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.
+  -->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_checked="true"  android:drawable="@drawable/ic_done_green" />
+</selector>
diff --git a/accessibility/CheckableLayout/Application/src/main/res/layout/activity_main.xml b/accessibility/CheckableLayout/Application/src/main/res/layout/activity_main.xml
new file mode 100644
index 00000000..18b0f4b3
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/layout/activity_main.xml
@@ -0,0 +1,51 @@
+<!--
+  Copyright 2016 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.
+  -->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.example.android.checkablelayout.MainActivity">
+
+
+    <com.example.android.checkablelayout.CheckableFrameLayout
+        android:id="@+id/frame_layout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:focusable="true">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:contentDescription="@string/birch_leaves"
+            android:scaleType="centerInside"
+            android:src="@drawable/birch_leaves" />
+
+        <!--
+        This ImageView uses `android:duplicateParentState` and a drawable tied to
+        android:state_checked, causing the checked image to display only when the parent is checked.
+        -->
+        <ImageView
+            android:layout_width="@dimen/check_dimen"
+            android:layout_height="@dimen/check_dimen"
+            android:layout_gravity="center"
+            android:duplicateParentState="true"
+            android:src="@drawable/ic_checkable_item" />
+    </com.example.android.checkablelayout.CheckableFrameLayout>
+
+</LinearLayout>
diff --git a/accessibility/CheckableLayout/Application/src/main/res/mipmap-hdpi/ic_launcher.png b/accessibility/CheckableLayout/Application/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100755
index 00000000..21c4e7b5
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/mipmap-hdpi/ic_launcher.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/mipmap-mdpi/ic_launcher.png b/accessibility/CheckableLayout/Application/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100755
index 00000000..28683887
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/mipmap-mdpi/ic_launcher.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/mipmap-xhdpi/ic_launcher.png b/accessibility/CheckableLayout/Application/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100755
index 00000000..ffbc0df4
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/mipmap-xhdpi/ic_launcher.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/mipmap-xxhdpi/ic_launcher.png b/accessibility/CheckableLayout/Application/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100755
index 00000000..3d016e54
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/mipmap-xxhdpi/ic_launcher.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/accessibility/CheckableLayout/Application/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100755
index 00000000..d7cedb6c
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/mipmap-xxxhdpi/ic_launcher.png
diff --git a/accessibility/CheckableLayout/Application/src/main/res/values-w820dp/dimens.xml b/accessibility/CheckableLayout/Application/src/main/res/values-w820dp/dimens.xml
new file mode 100644
index 00000000..146c0e15
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/values-w820dp/dimens.xml
@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>
diff --git a/accessibility/CheckableLayout/Application/src/main/res/values/colors.xml b/accessibility/CheckableLayout/Application/src/main/res/values/colors.xml
new file mode 100644
index 00000000..17f5a9f6
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/values/colors.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2016 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.
+  -->
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>
diff --git a/accessibility/CheckableLayout/Application/src/main/res/values/dimens.xml b/accessibility/CheckableLayout/Application/src/main/res/values/dimens.xml
new file mode 100644
index 00000000..b6e57b36
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/values/dimens.xml
@@ -0,0 +1,19 @@
+<!--
+  Copyright 2016 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.
+  -->
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+
+    <dimen name="check_dimen">144dp</dimen>
+</resources>
diff --git a/accessibility/CheckableLayout/Application/src/main/res/values/strings.xml b/accessibility/CheckableLayout/Application/src/main/res/values/strings.xml
new file mode 100644
index 00000000..76f9b95d
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/values/strings.xml
@@ -0,0 +1,16 @@
+<!--
+  Copyright 2016 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.
+  -->
+<resources>
+    <string name="app_name">CheckableLayout</string>
+    <string name="birch_leaves">Birch leaves</string>
+</resources>
diff --git a/accessibility/CheckableLayout/Application/src/main/res/values/styles.xml b/accessibility/CheckableLayout/Application/src/main/res/values/styles.xml
new file mode 100644
index 00000000..87edfaa7
--- /dev/null
+++ b/accessibility/CheckableLayout/Application/src/main/res/values/styles.xml
@@ -0,0 +1,21 @@
+<!--
+  Copyright 2016 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.
+  -->
+<resources>
+
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>
diff --git a/accessibility/CheckableLayout/build.gradle b/accessibility/CheckableLayout/build.gradle
new file mode 100644
index 00000000..9b6a9ce4
--- /dev/null
+++ b/accessibility/CheckableLayout/build.gradle
@@ -0,0 +1,12 @@
+
+
+// BEGIN_EXCLUDE
+import com.example.android.samples.build.SampleGenPlugin
+apply plugin: SampleGenPlugin
+
+samplegen {
+  pathToBuild "../../../../build"
+  pathToSamplesCommon "../../common"
+}
+apply from: "../../../../build/build.gradle"
+// END_EXCLUDE
diff --git a/accessibility/CheckableLayout/buildSrc/build.gradle b/accessibility/CheckableLayout/buildSrc/build.gradle
new file mode 100644
index 00000000..d77115d0
--- /dev/null
+++ b/accessibility/CheckableLayout/buildSrc/build.gradle
@@ -0,0 +1,16 @@
+
+repositories {
+    jcenter()
+}
+dependencies {
+    compile 'org.freemarker:freemarker:2.3.20'
+}
+
+sourceSets {
+    main {
+        groovy {
+            srcDir new File(rootDir, "../../../../../build/buildSrc/src/main/groovy")
+        }
+    }
+}
+
diff --git a/accessibility/CheckableLayout/gradle/wrapper/gradle-wrapper.jar b/accessibility/CheckableLayout/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..8c0fb64a
--- /dev/null
+++ b/accessibility/CheckableLayout/gradle/wrapper/gradle-wrapper.jar
diff --git a/accessibility/CheckableLayout/gradle/wrapper/gradle-wrapper.properties b/accessibility/CheckableLayout/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..7fb62910
--- /dev/null
+++ b/accessibility/CheckableLayout/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Fri Sep 02 14:16:53 PDT 2016
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
diff --git a/accessibility/CheckableLayout/gradlew b/accessibility/CheckableLayout/gradlew
new file mode 100755
index 00000000..91a7e269
--- /dev/null
+++ b/accessibility/CheckableLayout/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/accessibility/CheckableLayout/gradlew.bat b/accessibility/CheckableLayout/gradlew.bat
new file mode 100644
index 00000000..aec99730
--- /dev/null
+++ b/accessibility/CheckableLayout/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/accessibility/CheckableLayout/screenshots/checked.png b/accessibility/CheckableLayout/screenshots/checked.png
new file mode 100644
index 00000000..b9936b63
--- /dev/null
+++ b/accessibility/CheckableLayout/screenshots/checked.png
diff --git a/accessibility/CheckableLayout/screenshots/discover.png b/accessibility/CheckableLayout/screenshots/discover.png
new file mode 100644
index 00000000..169ec7d3
--- /dev/null
+++ b/accessibility/CheckableLayout/screenshots/discover.png
diff --git a/accessibility/CheckableLayout/screenshots/icon-web.png b/accessibility/CheckableLayout/screenshots/icon-web.png
new file mode 100644
index 00000000..28a022fc
--- /dev/null
+++ b/accessibility/CheckableLayout/screenshots/icon-web.png
diff --git a/accessibility/CheckableLayout/settings.gradle b/accessibility/CheckableLayout/settings.gradle
new file mode 100644
index 00000000..9464a359
--- /dev/null
+++ b/accessibility/CheckableLayout/settings.gradle
@@ -0,0 +1 @@
+include 'Application'
diff --git a/accessibility/CheckableLayout/template-params.xml b/accessibility/CheckableLayout/template-params.xml
new file mode 100644
index 00000000..e251ae03
--- /dev/null
+++ b/accessibility/CheckableLayout/template-params.xml
@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2013 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.
+-->
+
+<sample>
+    <name>CheckableLayout</name>
+    <group>Accessibility</group>
+    <package>com.example.android.checkablelayout</package>
+    <minSdk>16</minSdk>
+    <strings>
+        <intro>
+            <![CDATA[
+            Sample showing how to make an accessible custom view that extends
+            a layout.
+            ]]>
+        </intro>
+    </strings>
+
+    <template src="base-build" />
+
+    <metadata>
+        <status>PUBLISHED</status>
+        <categories>Accessibility</categories>
+        <technologies>Android</technologies>
+        <languages>Java</languages>
+        <solutions>Mobile</solutions>
+        <level>BEGINNER</level>
+        <icon>screenshots/icon-web.png</icon>
+        <screenshots>
+            <img>screenshots/discover.png</img>
+            <img>screenshots/checked.png</img>
+        </screenshots>
+        <api_refs>
+            <android>android.view.accessibility.AccessibilityNodeInfo</android>
+            <android>android.view.accessibility.AccessibilityEvent</android>
+        </api_refs>
+        <description>
+            Sample demonstrating how to make a simple custom view accessible.
+            Creates a simple `CheckableFrameLayout` that has the accessibility
+            profile of builtin that implements the `Checkable` interface (e.g.
+            `Checkbox`).
+        </description>
+        <intro>
+          This sample implements a single custom view, a
+          `CheckableFrameLayout`, which implements the `Checkable` interface
+          and maintains a checked state.
+
+          This sample uses the custom view as a container for two overlayed
+          `<![CDATA[<ImageView>]]>`s. The first `<![CDATA[<ImageView>]]>` is
+          always displayed, while the second `<![CDATA[<ImageView>]]>`'s
+          display status toggles with the checked state of it's parent (the
+          `CheckableLayout`). This second `<![CDATA[<ImageView>]]>` uses
+          `android:duplicateParentState` (see `activity_main.xml`) and a
+          drawable that is tied to `android:state_checked` (see
+          `drawable/ic_checkable_item.xml`). This drawable is displayed only
+          when the parent is in a checked state.
+
+          This sample provides a basic introduction to Android accessibility
+          by showing how to make a custom view behave similar to a builtin
+          widget like a `Checkbox`.
+          Developers should focus on two methods that are overridden from the
+          parent class:
+          `onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info)` and
+          `onInitializeAccessibilityEvent(AccessibilityEvent event)`.
+
+          The `onInitializeAccessibilityNodeInfo()` method provides
+          accessibility services with information about the state of this
+          view. We override this method to tell an accessibility service that
+          this view is checkable, and we set the intitial checked state of the
+          view.
+
+          The `onInitializeAccessibilityEvent()` method is use by the
+          system to obtain additional information about the state of the view
+          as its state changes.
+
+          With this information, an accessibility service has what it needs to
+          allow a user to meaningfully discover the view and know its state.
+        </intro>
+    </metadata>
+</sample>