游戏退出，安卓停止线程抛出异常

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        // ȫ���ö�
        prepare(0);
        game = new Thread(thread);
        thread = new GameThread();
        game.start();
    }

   @Override
    protected void onRestart() {
        super.onRestart();
        ExitGame = false;
    }

   @Override
    protected void onPause() {
//        thread.stop();
        super.onPause();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
//        mOrientationListener.disable();

    }

    class GameThread implements Runnable {
        Message msg;
        boolean exitflag = false;

        @Override
        public void run() {// �[�򾀳�
            while (!exitflag && !Thread.currentThread().isInterrupted()) {
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                }
                if (ExitGame) {
                    exitflag = true;
                    game.interrupt();
//                    Message msg = new Message();
//                    msg.obj = true;
//                    mHandler.sendMessage(msg);
                } else {
                    contorlView.postInvalidate();
                    if (!gv.molisha.isGameExit()) {//是否绘制
                        gv.postInvalidate();
                        mHandler.sendEmptyMessage(0);//交给
                    }
                }
            }
        }
    }

  @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) { //按下的如果是BACK，同时没有重复
//            Toast.makeText("lyj_test","now_is_back_event",1).show();
            ExitGame = true;
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            game = null;
//            game.destroy();
//            game.stop();
//            game.exit = true;  // 终止线程thread
//            game.join();
            finish();
            return true;

        }
        return super.onKeyDown(keyCode, event);
    }
//        2、重写onBackPressed方法
//
//    Android 2.0开始又多出了一种新的方法，对于Activity 可以单独获取Back键的按下事件，直接重写onBackPressed方法即可，代码如下

    @Override
    public void onBackPressed() {
        // 这里处理逻辑代码，大家注意：该方法仅适用于2.0或更新版的sdk
        return;
    }
}
最后我们看看壁纸解解乏http://www.gamersky.com/ent/201802/1015227_7.shtml