【Android】SurfaceView中使用线程绘制图形

 1 package com.example.surfaceviewthread;
 2 
 3  /* 
 4 * SurfaceView的示例程序 
 5 * 演示其流程 
 6  */ 
 7 
 8  import android.app.Activity; 
 9  import android.content.Context; 
10  import android.graphics.Canvas; 
11  import android.graphics.Color; 
12  import android.graphics.Paint; 
13  import android.graphics.RectF; 
14  import android.os.Bundle; 
15  import android.view.SurfaceHolder; 
16  import android.view.SurfaceView; 
17 
18  public class MainActivity extends Activity { 
19 
20      public void onCreate(Bundle savedInstanceState) { 
21          super.onCreate(savedInstanceState); 
22          setContentView(new MyView(this)); 
23      } 
24 
25      //内部类 
26      class MyView extends SurfaceView implements SurfaceHolder.Callback{ 
27          SurfaceHolder holder; 
28          
29          public MyView(Context context) { 
30              super(context); 
31              holder = this.getHolder();//获取holder 
32              holder.addCallback(this); 
33              //setFocusable(true); 
34          } 
35 
36          @Override 
37          public void surfaceChanged(SurfaceHolder holder, int format, int width,  int height) { 
38 
39          } 
40 
41          @Override 
42          public void surfaceCreated(SurfaceHolder holder) { 
43              new Thread(new MyThread()).start(); 
44          } 
45 
46 
47          @Override 
48          public void surfaceDestroyed(SurfaceHolder holder) { 
49          } 
50 
51          //内部类的内部类 
52          class MyThread implements Runnable{ 
53              @Override 
54              public void run() { 
55                  Canvas canvas = holder.lockCanvas(null);//获取画布 
56                  Paint mPaint = new Paint(); 
57                  mPaint.setColor(Color.BLUE); 
58                  canvas.drawRect(new RectF(40,60,80,80), mPaint); 
59                  holder.unlockCanvasAndPost(canvas);//解锁画布，提交画好的图像 
60              } 
61          } 
62      } 
63  }
代码写得简洁明了，学习起来非常方便，不多说。