我正在使用SurfaceView和一个线程进行游戏 . 在主线程中，我从SurfaceHolder锁定画布，然后解锁画布并发布锁定时获得的相同画布 . 当我重新启动游戏时，使用简单的意图，我收到以下错误消息：

java.lang.IllegalArgumentException: canvas object must be the same instance that was previously returned by lockCanvas
        at android.view.Surface.unlockSwCanvasAndPost(Surface.java:370)
        at android.view.Surface.unlockCanvasAndPost(Surface.java:363)
        at android.view.SurfaceView$3.unlockCanvasAndPost(SurfaceView.java:1089)
        at com.my.app.MainThread.run(MainThread.java:61)

这是我的代码：

Log.d(TAG, "Locking canvas!");
canvas = this.surfaceHolder.lockCanvas();

synchronized (surfaceHolder) {
    this.gameView.update(millitime);
    if(canvas != null)
        this.gameView.draw(canvas);
}
if(canvas != null) {
    Log.d(TAG, "Unlocking canvas!");
    this.surfaceHolder.unlockCanvasAndPost(canvas);
} else {
    Log.d(TAG, "Canvas is null!");
}

有什么问题？我确实返回相同的画布，但编辑 . 这样问题不对吗？谢谢！

顺便说一句，我看过这篇文章：Canvas object must be the same instance that was previously returned by lockCanvas但在那个问题中，SurfaceHolder.unlockAndPost在if（canvas！= null）之外 .

android android-canvas surfaceholder