如何在x分钟后关闭活动？

Question

我正在寻找最简单的方法来关闭x分钟后打开的活动.android提供倒计时课程还是我必须自己做一个？

我试过这段代码,但它不起作用

Thread isOnDisplayThread = new Thread(new Runnable() {
            @Override
            public void run() {
                Timer mTimer = new Timer();
                mTimer.schedule(new TimerTask() {    
                    @Override
                    public void run() {
                        Log.d(TAG, (isApplicationOnDisplay) ? "Application on display" : "APPLICATION ON BACKGROUND");

                        if (!isApplicationOnDisplay) {
                            notOnDisplayTime++;
                            if (notOnDisplayTime >= 10) {

                                Process.killProcess(Process.myPid());
                            }
                        } else {
                            notOnDisplayTime = 0;
                        }
                    }
                }, 0, 1000);
            }
        });

        isOnDisplayThread.run();

Answer 1

Handler handler = new Handler();
    Runnable r=new Runnable() {
              @Override
              public void run() {
                finish();
              }         
            };
        handler.postDelayed(r, 2000);