Android处理程序每​​秒都不起作用

Question

我的MainActivity中有处理程序，起初它工作得很好，但是由于某种原因它突然不起作用，因此不再每秒都重复该方法。

  private void showElapsedTime() {
        SharedPreferences pref = getSharedPreferences("chronometer",Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = pref.edit();
        long elapsedMillis = (SystemClock.elapsedRealtime() - chronometer.getBase())/1000;

        editor.putLong("time",elapsedMillis);
        Log.d(TAG, "seconds"+elapsedMillis);
        editor.commit();
    }

 @Override
      protected void onStart(){
        super.onStart();
          firebaseauth.addAuthStateListener(authListener);
        mChildReference1.addValueEventListener(new ValueEventListener() {
              @Override
              public void onDataChange (DataSnapshot dataSnapshot){
                    String status = dataSnapshot.getValue(String.class);

                   if (status.equals ("occupied")) {

                        chronometer.start();


                       handler1.postDelayed(new Runnable() {
                           @Override
                           public void run() {
                               showElapsedTime();

                               handler1.postDelayed(this, 1000); //every seconds
                           }
                       },0);
        else

                  handler1.removeCallbacksAndMessages(null);

              }

Answer 1

尝试

private Handler handler = new Handler();
private Runnable runnable;

handler.postDelayed(runnable = new Runnable() {
        @Override
        public void run() {

            handler.postDelayed(runnable, 1000);

        }
    }, 1000);

您需要将相同的可运行对象传递给run函数中的第二个处理程序。