【Android】SurfaceView中使用线程绘制图形

zz：SurfaceView 用线程画一个长方形

package com.example.surfaceviewthread;

 /* 
* SurfaceView的示例程序 
* 演示其流程 
 */ 

 import android.app.Activity; 
 import android.content.Context; 
 import android.graphics.Canvas; 
 import android.graphics.Color; 
 import android.graphics.Paint; 
 import android.graphics.RectF; 
 import android.os.Bundle; 
 import android.view.SurfaceHolder; 
 import android.view.SurfaceView; 

 public class MainActivity extends Activity { 

     public void onCreate(Bundle savedInstanceState) { 
         super.onCreate(savedInstanceState); 
         setContentView(new MyView(this)); 
     } 

     //内部类 
     class MyView extends SurfaceView implements SurfaceHolder.Callback{ 
         SurfaceHolder holder; 
         
         public MyView(Context context) { 
             super(context); 
             holder = this.getHolder();//获取holder 
             holder.addCallback(this); 
             //setFocusable(true); 
         } 

         @Override 
         public void surfaceChanged(SurfaceHolder holder, int format, int width,  int height) { 

         } 

         @Override 
         public void surfaceCreated(SurfaceHolder holder) { 
             new Thread(new MyThread()).start(); 
         } 


         @Override 
         public void surfaceDestroyed(SurfaceHolder holder) { 
         } 

         //内部类的内部类 
         class MyThread implements Runnable{ 
             @Override 
             public void run() { 
                 Canvas canvas = holder.lockCanvas(null);//获取画布 
                 Paint mPaint = new Paint(); 
                 mPaint.setColor(Color.BLUE); 
                 canvas.drawRect(new RectF(40,60,80,80), mPaint); 
                 holder.unlockCanvasAndPost(canvas);//解锁画布，提交画好的图像 
             } 
         } 
     } 
 } 

代码写得简洁明了，学习起来非常方便，不多说。