僅在Xamarin.Android中使用TimePicker設置AlarmManager，立即開始報警

Question

我嘗試使用時間選取器設置精確報警時遇到問題。 我設置TimePicker像這樣的處理程序：

TimePicker

TPBtn.Click += delegate 
      { 
       TimePickerDialog dialog = new TimePickerDialog(this, TimeSelectedListener, DateTime.Now.Hour, DateTime.Now.Minute, true); 
       dialog.Show(); 
      }; 

private void TimeSelectedListener(object sender, TimePickerDialog.TimeSetEventArgs e) 
     { 
      hour = e.HourOfDay; 
      minute = e.Minute; 

      DateTime dtNow = DateTime.Now; 
      int DayOfMonth = dtNow.Day; 
      int Month = dtNow.Month; 
      int Year = dtNow.Year; 

      Calendar cl = Calendar.Instance; 
      cl.Set(Year, Month, DayOfMonth, hour, minute, 0); 

      AlarmManager am = (AlarmManager)this.GetSystemService(AlarmService); 
      Intent intent = new Intent(this, typeof(OneShotAlarm)); 
      intent.AddFlags(ActivityFlags.NewTask); 
      var source = PendingIntent.GetBroadcast(this, 0, intent, 0); 

      am.SetExact(AlarmType.RtcWakeup, cl.TimeInMillis, source); 

      Toast.MakeText(this, "Set Today: " + cl.TimeInMillis, ToastLength.Short).Show(); 
     } 

不幸的是，這樣的警報時，立即播放。 我也嘗試使用am.SetAlarmClock，但我不知道如何使用RTC時間，你能幫助我嗎？

我已經讀了很多絲線猶如I am trying to set alarm on specific time using alarm manager but alarm intiated instantly?和Set AlarmManager from DatePicker and TimePicker

非常感謝。

Answer 1

am.SetExact(AlarmType.RtcWakeup, cl.TimeInMillis, source);

cl.TimeInMillis被稱爲上Calendar.Instance還沒有以任何方式被操作。這意味着它被設置爲「現在」，因此警報立即發射。

您不清楚您想要什麼時候啓動鬧鐘，但您需要提供正確的TimeInMillis才能啓動鬧鐘。