SurfaceView和Game线程同步

Question

我有一个SurfaceView和一个GameThread，可以更新游戏状态并在画布上绘制位图。下面的surface.update（）更新锁外的游戏变量，并创建一个必须在画布上绘制的位图。锁定surface.doDraw后，在画布上绘制该位图。 Update（）是外部UI线程锁定是为了提高性能。这种方法有误吗？我是否必须在锁定下更新？

public class GameThread extends Thread {

private SurfaceHolder surfaceHolder;
private GameViewSurface surface;
private boolean running = false;

public GameThread(SurfaceHolder holder, GameViewSurface GameSurface) {
    surfaceHolder = holder;
    surface = GameSurface;
}

public void setRunning(boolean run) {
    running = run;
}

public boolean getRunning() {
    return running;
}

@Override
public void run() {
    while (running) {

        Canvas canvas=null;
        try {

            if(!surfaceHolder.getSurface().isValid())
                continue;

            surface.update();
            canvas = surfaceHolder.lockCanvas(null);
            synchronized (surfaceHolder) {

                surface.doDraw(canvas);
            }
        } catch(Exception p){


        }finally {
            if (canvas != null) {
                try {
                    surfaceHolder.unlockCanvasAndPost(canvas);
                }catch (Exception e){}
            }
        }
    }
}

}