仅在Xamarin.Android中使用TimePicker设置AlarmManager，立即开始报警

Question

我尝试使用时间选取器设置精确报警时遇到问题。 我设置TimePicker像这样的处理程序：

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，这样的警报时，立即播放。 我也尝试使用am.SetAlarmClock，但我不知道如何使用RTC时间，你能帮助我吗？

我已经读了很多丝线犹如I am trying to set alarm on specific time using alarm manager but alarm intiated instantly?和Set AlarmManager from DatePicker and TimePicker

非常感谢。

Answer 1

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

cl.TimeInMillis被称为上Calendar.Instance还没有以任何方式被操作。这意味着它被设置为“现在”，因此警报立即发射。

您不清楚您想要什么时候启动闹钟，但您需要提供正确的TimeInMillis才能启动闹钟。