Android SurfaceView

转载出处http://www.cnblogs.com/xuling/archive/2011/06/06/android.html

public class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback {    SurfaceHolder surfaceHolder;//surface的控制器，用来操纵surface。处理它的Canvas上画的效果和动画，控制表面，大小，像素等。    MyTHread myTHread;    public MySurfaceView(Context context) {        super(context);        surfaceHolder = this.getHolder();        surfaceHolder.addCallback(this);        myTHread = new MyTHread(surfaceHolder);    }    @Override    public void surfaceCreated(SurfaceHolder holder) {    }    @Override    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {        myTHread.isRun = true;        myTHread.start();    }    @Override    public void surfaceDestroyed(SurfaceHolder holder) {        myTHread.isRun = false;    }    //画图线程    class MyTHread extends Thread    {        private SurfaceHolder holder;        public boolean isRun;        public MyTHread(SurfaceHolder holder) {            this.holder = holder;            isRun = true;        }        @Override        public void run() {            int count = 1;            while (isRun) {                Canvas c = null;                try {                    synchronized (holder) {                        //锁定画布，一般在锁定后就可以通过其返回的画布对象Canvas，在其上面画图等操作了。                        c = holder.lockCanvas();                        //(作画)                        //设置画布背景颜色                        c.drawColor(Color.BLACK);                        Paint p = new Paint();                        p.setColor(Color.WHITE);                        Rect r = new Rect(100,50,300,250);                        c.drawRect(r, p);                        c.drawText("这是"+ (count++) +"秒", 100,310,p);                        Thread.sleep(1000);                    }                } catch (Exception e) {                    e.printStackTrace();                } finally {                    if (c != null) {                        holder.unlockCanvasAndPost(c);//结束锁定画图，并提交改变。                    }                }            }        }    }}