1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.test.hwui; 18 19 import android.app.Activity; 20 import android.graphics.Canvas; 21 import android.graphics.Paint; 22 import android.graphics.PorterDuff; 23 import android.graphics.SurfaceTexture; 24 import android.os.Bundle; 25 import android.view.Gravity; 26 import android.view.TextureView; 27 import android.widget.FrameLayout; 28 29 @SuppressWarnings({"UnusedDeclaration"}) 30 public class CanvasTextureViewActivity extends Activity 31 implements TextureView.SurfaceTextureListener { 32 private TextureView mTextureView; 33 private CanvasTextureViewActivity.RenderingThread mThread; 34 35 @Override onCreate(Bundle savedInstanceState)36 protected void onCreate(Bundle savedInstanceState) { 37 super.onCreate(savedInstanceState); 38 39 FrameLayout content = new FrameLayout(this); 40 41 mTextureView = new TextureView(this); 42 mTextureView.setSurfaceTextureListener(this); 43 mTextureView.setOpaque(false); 44 45 content.addView(mTextureView, new FrameLayout.LayoutParams(500, 500, Gravity.CENTER)); 46 setContentView(content); 47 } 48 49 @Override onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)50 public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) { 51 mThread = new RenderingThread(mTextureView); 52 mThread.start(); 53 } 54 55 @Override onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height)56 public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) { 57 // Ignored 58 } 59 60 @Override onSurfaceTextureDestroyed(SurfaceTexture surface)61 public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) { 62 if (mThread != null) mThread.stopRendering(); 63 return true; 64 } 65 66 @Override onSurfaceTextureUpdated(SurfaceTexture surface)67 public void onSurfaceTextureUpdated(SurfaceTexture surface) { 68 // Ignored 69 } 70 71 private static class RenderingThread extends Thread { 72 private final TextureView mSurface; 73 private volatile boolean mRunning = true; 74 RenderingThread(TextureView surface)75 public RenderingThread(TextureView surface) { 76 mSurface = surface; 77 } 78 79 @Override run()80 public void run() { 81 float x = 0.0f; 82 float y = 0.0f; 83 float speedX = 5.0f; 84 float speedY = 3.0f; 85 86 Paint paint = new Paint(); 87 paint.setColor(0xff00ff00); 88 89 while (mRunning && !Thread.interrupted()) { 90 final Canvas canvas = mSurface.lockCanvas(null); 91 try { 92 canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); 93 canvas.drawRect(x, y, x + 20.0f, y + 20.0f, paint); 94 } finally { 95 mSurface.unlockCanvasAndPost(canvas); 96 } 97 98 if (x + 20.0f + speedX >= mSurface.getWidth() || x + speedX <= 0.0f) { 99 speedX = -speedX; 100 } 101 if (y + 20.0f + speedY >= mSurface.getHeight() || y + speedY <= 0.0f) { 102 speedY = -speedY; 103 } 104 105 x += speedX; 106 y += speedY; 107 108 try { 109 Thread.sleep(15); 110 } catch (InterruptedException e) { 111 // Interrupted 112 } 113 } 114 } 115 stopRendering()116 void stopRendering() { 117 interrupt(); 118 mRunning = false; 119 } 120 } 121 } 122