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commonsguycommonsguy
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demo of screenshot media projection APIs
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‎MediaProjection/andprojector/app/build.gradle‎

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apply plugin: 'com.android.application'
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dependencies {
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compile project(':webserver')
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}
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android {
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compileSdkVersion 23
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buildToolsVersion "23.0.0"
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defaultConfig {
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applicationId "com.commonsware.andprojector"
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minSdkVersion 21
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targetSdkVersion 23
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versionCode 1
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versionName "1.0"
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}
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aaptOptions {
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noCompress 'html', 'js'
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
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}
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}
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}

‎MediaProjection/andprojector/app/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# By default, the flags in this file are appended to flags specified
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# in /opt/android-sdk-linux/tools/proguard/proguard-android.txt
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# You can edit the include path and order by changing the proguardFiles
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# directive in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# Add any project specific keep options here:
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}

‎MediaProjection/andprojector/app/src/androidTest/java/com/commonsware/andprojector/ApplicationTest.java‎

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package com.commonsware.andprojector;
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import android.app.Application;
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import android.test.ApplicationTestCase;
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/**
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* <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
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*/
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public class ApplicationTest extends ApplicationTestCase<Application> {
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public ApplicationTest() {
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super(Application.class);
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}
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}

‎MediaProjection/andprojector/app/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest
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package="com.commonsware.andprojector"
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xmlns:android="http://schemas.android.com/apk/res/android">
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<uses-permission android:name="android.permission.INTERNET"/>
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<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
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<application
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:theme="@style/AppTheme">
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<activity
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android:name=".MainActivity"
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android:theme="@style/AppTheme">
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<intent-filter>
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<action android:name="android.intent.action.MAIN"/>
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<category android:name="android.intent.category.LAUNCHER"/>
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</intent-filter>
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</activity>
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<service
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android:name=".ProjectorService"
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android:exported="false">
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<intent-filter>
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<action android:name="com.commonsware.android.webserver.WEB_SERVER_SERVICE"/>
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</intent-filter>
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</service>
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</application>
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</manifest>

‎MediaProjection/andprojector/app/src/main/assets/index.html‎

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<html>
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<head>
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<title>andprojector</title>
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</head>
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<body>
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<img id="screen"
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style="height: 100%; width: 100%; object-fit: contain"
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src="screen/0">
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<script src="js/app.js"></script>
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</body>
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</html>

‎MediaProjection/andprojector/app/src/main/assets/js/app.js‎

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window.onload = function() {
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var screen=document.getElementById('screen');
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var ws_url=location.href.replace('http://', 'ws://')+'ss';
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var socket=new WebSocket(ws_url);
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socket.onopen = function(event) {
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// console.log(event.currentTarget.url);
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};
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socket.onerror = function(error) {
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console.log('WebSocket error: ' + error);
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};
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socket.onmessage = function(event) {
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screen.src=event.data;
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};
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}

‎MediaProjection/andprojector/app/src/main/assets/js/jquery-1.11.3.min.js‎

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‎MediaProjection/andprojector/app/src/main/java/com/commonsware/andprojector/ImageTransmogrifier.java‎

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/***
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Copyright (c) 2015 CommonsWare, LLC
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Licensed under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy
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of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
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by applicable law or agreed to in writing, software distributed under the
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License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
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OF ANY KIND, either express or implied. See the License for the specific
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language governing permissions and limitations under the License.
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From _The Busy Coder's Guide to Android Development_
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https://commonsware.com/Android
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*/
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package com.commonsware.andprojector;
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import android.graphics.Bitmap;
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import android.graphics.PixelFormat;
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import android.graphics.Point;
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import android.media.Image;
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import android.media.ImageReader;
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import android.view.Display;
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import android.view.Surface;
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import java.io.ByteArrayOutputStream;
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import java.nio.ByteBuffer;
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public class ImageTransmogrifier implements ImageReader.OnImageAvailableListener {
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private final int width;
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private final int height;
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private final ImageReader imageReader;
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private final ProjectorService svc;
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private Bitmap latestBitmap=null;
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ImageTransmogrifier(ProjectorService svc) {
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this.svc=svc;
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Display display=svc.getWindowManager().getDefaultDisplay();
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Point size=new Point();
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display.getSize(size);
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int width=size.x;
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int height=size.y;
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while (width*height > (2<<19)) {
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width=width>>1;
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height=height>>1;
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}
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this.width=width;
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this.height=height;
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imageReader=ImageReader.newInstance(width, height,
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PixelFormat.RGBA_8888, 2);
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imageReader.setOnImageAvailableListener(this, svc.getHandler());
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}
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@Override
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public void onImageAvailable(ImageReader reader) {
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final Image image=imageReader.acquireLatestImage();
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if (image!=null) {
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Image.Plane[] planes=image.getPlanes();
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ByteBuffer buffer=planes[0].getBuffer();
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int pixelStride=planes[0].getPixelStride();
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int rowStride=planes[0].getRowStride();
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int rowPadding=rowStride - pixelStride * width;
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int bitmapWidth=width + rowPadding / pixelStride;
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if (latestBitmap == null ||
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latestBitmap.getWidth() != bitmapWidth ||
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latestBitmap.getHeight() != height) {
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if (latestBitmap != null) {
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latestBitmap.recycle();
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}
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latestBitmap=Bitmap.createBitmap(bitmapWidth,
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height, Bitmap.Config.ARGB_8888);
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}
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latestBitmap.copyPixelsFromBuffer(buffer);
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if (image != null) {
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image.close();
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}
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ByteArrayOutputStream baos=new ByteArrayOutputStream();
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Bitmap cropped=Bitmap.createBitmap(latestBitmap, 0, 0,
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width, height);
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cropped.compress(Bitmap.CompressFormat.PNG, 100, baos);
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byte[] newPng=baos.toByteArray();
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svc.updateImage(newPng);
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}
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}
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Surface getSurface() {
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return(imageReader.getSurface());
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}
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int getWidth() {
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return(width);
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}
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int getHeight() {
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return(height);
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}
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void close() {
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imageReader.close();
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}
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}

‎MediaProjection/andprojector/app/src/main/java/com/commonsware/andprojector/MainActivity.java‎

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/***
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Copyright (c) 2015 CommonsWare, LLC
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Licensed under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy
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of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
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by applicable law or agreed to in writing, software distributed under the
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License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
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OF ANY KIND, either express or implied. See the License for the specific
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language governing permissions and limitations under the License.
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From _The Busy Coder's Guide to Android Development_
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https://commonsware.com/Android
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*/
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package com.commonsware.andprojector;
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import android.app.ListActivity;
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import android.content.Intent;
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import android.media.projection.MediaProjectionManager;
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import android.os.Bundle;
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import android.view.Menu;
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import android.view.MenuItem;
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import android.view.Window;
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import android.view.WindowManager;
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import android.widget.ArrayAdapter;
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import com.commonsware.android.webserver.WebServerService;
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import de.greenrobot.event.EventBus;
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public class MainActivity extends ListActivity {
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private static final int REQUEST_SCREENSHOT=59706;
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private MenuItem start, stop;
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private MediaProjectionManager mgr;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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Window window=getWindow();
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window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
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window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
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window.setStatusBarColor(
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getResources().getColor(R.color.primary_dark));
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mgr=(MediaProjectionManager)getSystemService(MEDIA_PROJECTION_SERVICE);
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}
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@Override
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protected void onResume() {
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super.onResume();
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EventBus.getDefault().registerSticky(this);
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}
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@Override
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protected void onPause() {
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EventBus.getDefault().unregister(this);
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super.onPause();
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}
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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getMenuInflater().inflate(R.menu.actions, menu);
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start=menu.findItem(R.id.start);
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stop=menu.findItem(R.id.stop);
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WebServerService.ServerStartedEvent event=
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EventBus.getDefault().getStickyEvent(WebServerService.ServerStartedEvent.class);
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if (event!=null) {
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handleStartEvent(event);
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}
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return(super.onCreateOptionsMenu(menu));
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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if (item.getItemId()==R.id.start) {
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startActivityForResult(mgr.createScreenCaptureIntent(),
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REQUEST_SCREENSHOT);
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}
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else {
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stopService(new Intent(this, ProjectorService.class));
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}
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return super.onOptionsItemSelected(item);
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}
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@Override
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protected void onActivityResult(int requestCode, int resultCode,
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Intent data) {
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if (requestCode==REQUEST_SCREENSHOT) {
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if (resultCode==RESULT_OK) {
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Intent i=
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new Intent(this, ProjectorService.class)
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.putExtra(ProjectorService.EXTRA_RESULT_CODE,
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resultCode)
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.putExtra(ProjectorService.EXTRA_RESULT_INTENT,
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data);
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startService(i);
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}
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}
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}
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public void onEventMainThread(WebServerService.ServerStartedEvent event) {
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if (start!=null) {
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handleStartEvent(event);
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}
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}
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public void onEventMainThread(WebServerService.ServerStoppedEvent event) {
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if (start!=null) {
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start.setVisible(true);
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stop.setVisible(false);
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setListAdapter(null);
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}
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}
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private void handleStartEvent(WebServerService.ServerStartedEvent event) {
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start.setVisible(false);
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stop.setVisible(true);
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setListAdapter(new ArrayAdapter<String>(this,
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android.R.layout.simple_list_item_1, event.getUrls()));
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}
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}

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