SurfaceView

public class SurfaceView extends View {

public SurfaceHolder getHolder() { 

return mSurfaceHolder; 
}

}

public interface SurfaceHolder {

public Canvas lockCanvas();

public Canvas lockCanvas(Rect dirty);

public void unlockCanvasAndPost(Canvas canvas);

}

public class MyView extends SurfaceView implements SurfaceHolder.Callback 

{
public void surfaceCreated(SurfaceHolder holder) {
}

public void surfaceDestroyed(SurfaceHolder holder){

}

public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {

}

}

surfaceCreated()中启动更新线程

1.绘画线程

2.更新线程