surfaceView基本用法

来源：互联网发布：如何采集新车交易数据编辑：程序博客网时间：2024/04/30 05:13

public class MySurfaceView extends SurfaceView implements Callback{

//声明画笔

   private Paint paint;

   public MySurfaceView(Context context) {

super(context);

//初始化画笔

paint = new Paint();

//给画笔设置颜色

paint.setColor(Color.RED);

//给SurfaceView添加监听

       getHolder().addCallback(this);

   }

private void draw(){

//获取并锁定画布

Canvas canvas = getHolder().lockCanvas();

//设置画布的背景色

canvas.drawColor(Color.WHITE);

//开始画圆

canvas.drawCircle(100, 100, 100, paint);

//提交并释放锁

       getHolder().unlockCanvasAndPost(canvas);
   }

   @Override
   public void surfaceCreated(SurfaceHolder holder) {
       draw();
   }

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

   }

   @Override
   public void surfaceDestroyed(SurfaceHolder holder) {

   }

}

public class MainActivity extends Activity{

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       MySurfaceView surfaceView = new MySurfaceView(this);
       setContentView(surfaceView);
   }

}

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