Adds CommitContentSampleIME sample to repo.

Change-Id: Ie4fe0cddf0b2980fd4c940a5b0116cb0d64c170a

Author: Jeremy Walker

CommitContentSampleIME/.google/packaging.yaml

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+
+# GOOGLE SAMPLE PACKAGING DATA
+#
+# This file is used by Google as part of our samples packaging process.
+# End users may safely ignore this file. It has no relevance to other systems.
+---
+status:       PUBLISHED
+technologies: [Android]
+categories:   [System]
+languages:    [Java]
+solutions:    [Mobile]
+github:       android/input
+level:        INTERMEDIATE
+icon:         screenshots/icon-web.png
+apiRefs:
+    - android:android.widget.EditText
+    - android:import android.support.v13.view.inputmethod.EditorInfoCompat
+    - android:import android.support.v13.view.inputmethod.InputConnectionCompat
+    - android:import android.support.v13.view.inputmethod.InputContentInfoCompat
+license: apache2

CommitContentSampleIME/README.md

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+
+Android CommitContentSampleIME Sample
+===================================
+
+This sample demonstrates how to write an keyboard which sends rich content (such as images) to text
+fields using the Commit Content API.
+
+Introduction
+------------
+
+Users often want to communicate with emojis, stickers, and other kinds of rich content. In previous
+versions of Android, soft keyboards (input method editors or IMEs) could send only unicode emoji to
+apps. For rich content (such as images), apps had to either build app-specific APIs that couldn't
+be used in other apps or use workarounds like sending images through the Easy Share Action or the
+clipboard.
+
+Now in Android 7.1 (API 25), the Android SDK includes the [Commit Content API][1], which provides a
+universal way for IMEs to send images and other rich content directly to a text editor in an app.
+The API is also available in the v13 Support Library (ver. 25.0), supporting devices as early as
+Android 3.2 (API 13).
+
+With this API, you can build messaging apps that accept rich content from any keyboard, as well as
+keyboards that can send rich content to any app.
+
+**Note:** This sample does not have a default Activity. After installing it, you will need to enable
+this app as a keyboard by navigating to *Settings > Languages & Input > Virtual Keyboard > Manage
+Keyboards*. This keyboard can then be accessed by pressing the virtual keyboard icon in the
+lower-right hand corner of the display while in a text field.
+
+[1]: https://android-dot-devsite.googleplex.com/preview/image-keyboard.html
+
+Pre-requisites
+--------------
+
+- Android SDK 28
+- Android Build Tools v28.0.3
+- Android Support Repository
+
+Screenshots
+-------------
+
+<img src="screenshots/screenshot-1.png" height="400" alt="Screenshot"/> 
+
+Getting Started
+---------------
+
+This sample uses the Gradle build system. To build this project, use the
+"gradlew build" command or use "Import Project" in Android Studio.
+
+Support
+-------
+
+- Stack Overflow: http://stackoverflow.com/questions/tagged/android
+
+If you've found an error in this sample, please file an issue:
+https://github.com/android/input
+
+Patches are encouraged, and may be submitted by forking this project and
+submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.

CommitContentSampleIME/app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.example.android.commitcontent.ime"
+        minSdkVersion 16
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(include: ['*.jar'], dir: 'libs')
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:28.0.0'
+    compile 'com.android.support:support-v13:28.0.0'
+    testCompile 'junit:junit:4.12'
+}

CommitContentSampleIME/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /usr/local/google/home/yukawa/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 *;
+#}

CommitContentSampleIME/app/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.android.commitcontent.ime">
+
+    <application
+        android:allowBackup="false"
+        android:icon="@mipmap/ic_launcher"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+
+        <service
+            android:name="com.example.android.commitcontent.ime.ImageKeyboard"
+            android:permission="android.permission.BIND_INPUT_METHOD">
+            <intent-filter>
+                <action android:name="android.view.InputMethod" />
+            </intent-filter>
+            <meta-data android:name="android.view.im" android:resource="@xml/method" />
+        </service>
+
+        <provider
+            android:name="android.support.v4.content.FileProvider"
+            android:authorities="com.example.android.commitcontent.ime.inputcontent"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
+
+    </application>
+
+</manifest>