x分鍾后如何關閉活動？

Question

我正在尋找最簡單的方法來關閉x分鍾后打開的活動。 android是否提供倒計時課程，還是我必須自己制作一個？

我已經嘗試過此代碼，但無法正常工作

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); 

Answer 2

永遠也永遠不會*調用Java Thread的run()方法。 調用其start()方法，這將導致Java 在新線程內為您調用其run()方法。

Answer 3

餿主意：

Process.killProcess（Process.myPid（））;

您應該在UI線程中調用finish（）函數。 例如，使用runOnUiThread（）： 鏈接

Answer 4

它不起作用，因為您正在調用run方法。 它不會啟動線程。 因此，您需要調用start方法來調用線程

  isOnDisplayThread.start();

另外，要結束線程，您需要調用

        finish() ///method of the Activity class

如果代碼是在Activity類中包含的，則只需調用finish（）方法

    if (notOnDisplayTime >= 10) {

            finish();
    }

Answer 5

private final long startTime = 200000;
private final long interval = 1000;
countDownTimer = new MalibuCountDownTimer(startTime, interval);
    countDownTimer.start();
public class MalibuCountDownTimer extends CountDownTimer{
        public MalibuCountDownTimer(long startTime, long interval){
            super(startTime, interval);
        }
            @Override
            public void onFinish(){
                txttimer.setText("Time's up!");                 
                    //timeElapsedView.setText("Time Elapsed: " + String.valueOf(startTime));
            }
            @Override
            public void onTick(long millisUntilFinished) {
                    //text.setText("Time remain:" + millisUntilFinished);
                    //timeElapsed = startTime - millisUntilFinished;
                    String format = String.format("%%0%dd",2);  
                    String seconds = String.format(format, millisUntilFinished/1000 % 60);  
                     String minutes = String.format(format, (millisUntilFinished /(1000*60))%60);  
                     String hours = String.format(format, (millisUntilFinished /(1000*60*60))%24);  
                     String time =  hours + ":" + minutes + ":" + seconds;  
                     txttimer.setText("Time Remaining:" + time);
                            TimeUnit.MILLISECONDS.toMinutes(timeElapsed) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(timeElapsed)),
                            TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(timeElapsed)));
                    System.out.println(hms);
                    //text.setText("Time remain:" + h+":"+m+":"+s);
                    //timeElapsedView.setText("Time Elapsed: " + String.valueOf(timeElapsed));   
                }
        }

Answer 6

聲明Timer並調用finish() 。 一段時間后，它將關閉您的活動。

  //Declare the timer
  Timer t = new Timer();
  //Set the schedule function and rate
  t.schedule(new TimerTask() {

@Override
public void run() {
     finish(); 
}

 },
  //Set how long before to start calling the TimerTask (in milliseconds)
0,
//Set the amount of time between each execution (in milliseconds)
 1000);

Answer 7

只需使用Handler.postDelayed方法。