java - 如果日期是第二天，则运行方法

Question

我想做这样的事情:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity);

 int i = (int) (new Date().getTime()/1000);

   if(      ) // next day
     {
         mymethod();
     }
}

当系统日期是新的一天时，我想调用mymethod()

Answer 1

新的一天是指午夜之后吗？那么您想检测日期是否与上次不同？

  @Override
  protected void onResume() {
     SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
     int lastTimeStarted = settings.getInt("last_time_started", -1);
     Calendar calendar = Calendar.getInstance();
     int today = calendar.get(Calendar.DAY_OF_YEAR);

    if (today != lastTimeStarted) {
      //startSomethingOnce();

      SharedPreferences.Editor editor = settings.edit();
      editor.putInt("last_time_started", today);
      editor.commit();
    }
  }