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      1 /*
      2  * Copyright (C) 2014 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.os.Bundle;
     24 import android.view.Gravity;
     25 import android.view.Surface;
     26 import android.view.SurfaceHolder;
     27 import android.view.SurfaceHolder.Callback;
     28 import android.view.SurfaceView;
     29 import android.widget.FrameLayout;
     30 
     31 @SuppressWarnings({"UnusedDeclaration"})
     32 public class HardwareCanvasSurfaceViewActivity extends Activity implements Callback {
     33     private SurfaceView mSurfaceView;
     34     private HardwareCanvasSurfaceViewActivity.RenderingThread mThread;
     35 
     36     @Override
     37     protected void onCreate(Bundle savedInstanceState) {
     38         super.onCreate(savedInstanceState);
     39 
     40         FrameLayout content = new FrameLayout(this);
     41 
     42         mSurfaceView = new SurfaceView(this);
     43         mSurfaceView.getHolder().addCallback(this);
     44 
     45         content.addView(mSurfaceView, new FrameLayout.LayoutParams(
     46                 FrameLayout.LayoutParams.MATCH_PARENT,
     47                 FrameLayout.LayoutParams.MATCH_PARENT,
     48                 Gravity.CENTER));
     49         setContentView(content);
     50     }
     51 
     52     @Override
     53     public void surfaceCreated(SurfaceHolder holder) {
     54         mThread = new RenderingThread(holder.getSurface());
     55         mThread.start();
     56     }
     57 
     58     @Override
     59     public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
     60         mThread.setSize(width, height);
     61     }
     62 
     63     @Override
     64     public void surfaceDestroyed(SurfaceHolder holder) {
     65         if (mThread != null) mThread.stopRendering();
     66     }
     67 
     68     private static class RenderingThread extends Thread {
     69         private final Surface mSurface;
     70         private volatile boolean mRunning = true;
     71         private int mWidth, mHeight;
     72 
     73         public RenderingThread(Surface surface) {
     74             mSurface = surface;
     75         }
     76 
     77         void setSize(int width, int height) {
     78             mWidth = width;
     79             mHeight = height;
     80         }
     81 
     82         @Override
     83         public void run() {
     84             float x = 0.0f;
     85             float y = 0.0f;
     86             float speedX = 5.0f;
     87             float speedY = 3.0f;
     88 
     89             Paint paint = new Paint();
     90             paint.setColor(0xff00ff00);
     91 
     92             while (mRunning && !Thread.interrupted()) {
     93                 final Canvas canvas = mSurface.lockHardwareCanvas();
     94                 try {
     95                     canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR);
     96                     canvas.drawRect(x, y, x + 20.0f, y + 20.0f, paint);
     97                 } finally {
     98                     mSurface.unlockCanvasAndPost(canvas);
     99                 }
    100 
    101                 if (x + 20.0f + speedX >= mWidth || x + speedX <= 0.0f) {
    102                     speedX = -speedX;
    103                 }
    104                 if (y + 20.0f + speedY >= mHeight || y + speedY <= 0.0f) {
    105                     speedY = -speedY;
    106                 }
    107 
    108                 x += speedX;
    109                 y += speedY;
    110 
    111                 try {
    112                     Thread.sleep(15);
    113                 } catch (InterruptedException e) {
    114                     // Interrupted
    115                 }
    116             }
    117         }
    118 
    119         void stopRendering() {
    120             interrupt();
    121             mRunning = false;
    122         }
    123     }
    124 }
    125