SurfaceView动画实例

package game.test;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.SurfaceHolder.Callback;

public class TestSurfaceView extends SurfaceView implements Callback, Runnable {

    private SurfaceHolder surfaceHolder;
    private int width, height;
    private boolean bExit;
    private Paint paint;
    private Rect rect;
    
    public TestSurfaceView(Context context) {
        super(context);
        surfaceHolder = this.getHolder();
        surfaceHolder.addCallback(this);
        rect = new Rect(100, 0, 120, 20);
        paint = new Paint();  
        paint.setAntiAlias(true);  
        paint.setColor(Color.WHITE);  
        this.setKeepScreenOn(true);
        bExit = false;
    }

    private void draw() {
        Canvas canvas = surfaceHolder.lockCanvas();
        canvas.drawColor(Color.BLACK);
        rect.top += 10;
        if(rect.top > height)
            rect.top = 0;
        rect.bottom = rect.top + 20;
        canvas.drawRect(rect, paint);
        surfaceHolder.unlockCanvasAndPost(canvas);
    }
    
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        width = this.getWidth();
        height = this.getHeight();
        new Thread(this).start();
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        
    }

    @Override
    public void run() {
        while(!bExit) {
            draw();
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}