警报每次打开应用程序时都会关闭

我无法弄清楚为什么每当我打开我的应用程序时，我的通知设置为关闭闹钟就会被取消。 我只在特定的日期和时间设置日历。 不仅是我的闹钟在日历的指定时间和星期几甚至没有响起。 我的闹钟甚至需要服务吗？ 我试图确保即使应用程序关闭也会关闭。

下面的代码（MyService）在MainActivity onCreate（）中调用。

[Service] public class MyService : Service { //const int NOTIFICATION_ID = 9000; public override StartCommandResult OnStartCommand(Intent intent, StartCommandFlags flags, int startId) { SetAlarm(); return StartCommandResult.Sticky; } private void SetAlarm() { //setting Calendar Java.Util.Calendar calendar = Java.Util.Calendar.Instance; calendar.Set(Java.Util.CalendarField.DayOfWeek, 1); calendar.Set(Java.Util.CalendarField.HourOfDay, 02); calendar.Set(Java.Util.CalendarField.Minute, 15); AlarmManager manager = (AlarmManager)GetSystemService(Context.AlarmService); Intent managerIntent; PendingIntent pendingIntent; managerIntent = new Intent(this, typeof(AlarmNotificationReceiver)); // pendingIntent = PendingIntent.GetBroadcast(this, 0, managerIntent, 0); pendingIntent = PendingIntent.GetBroadcast(this, 0, managerIntent, PendingIntentFlags.UpdateCurrent); //manager.SetRepeating(AlarmType.RtcWakeup, SystemClock.ElapsedRealtime() + 3000, 60 + 1000, pendingIntent); // manager.SetRepeating(AlarmType.ElapsedRealtimeWakeup, SystemClock.ElapsedRealtime() + AlarmManager.IntervalHalfHour, AlarmManager.IntervalHalfHour, pendingIntent); // manager.SetRepeating(AlarmType.RtcWakeup, calendar.TimeInMillis, AlarmManager.IntervalHalfHour, pendingIntent); manager.SetRepeating(AlarmType.RtcWakeup, calendar.TimeInMillis, 604800, pendingIntent); } [BroadcastReceiver(Enabled = true)] public class AlarmNotificationReceiver : BroadcastReceiver { public override void OnReceive(Context context, Intent intent) { NotificationCompat.Builder builder = new NotificationCompat.Builder(context); builder.SetAutoCancel(true) .SetDefaults((int)NotificationDefaults.All) .SetSmallIcon(Resource.Drawable.Icon) .SetContentTitle("Comic Pull List") .SetStyle(new NotificationCompat.BigTextStyle().BigText("New Comics have came out this week! Check your list and pull comics if needed.")) .SetContentText("New Comics have came out this week! Check your list and pull comics if needed."); NotificationManager manager = (NotificationManager)context.GetSystemService(Context.NotificationService); manager.Notify(1, builder.Build()); } } 

}

我添加的新代码如下：

  AlarmManager manager = (AlarmManager)GetSystemService(Context.AlarmService); //setting Calendar Java.Util.Calendar calendar = Java.Util.Calendar.Instance; if (calendar.Get(Java.Util.CalendarField.DayOfWeek) == Java.Util.Calendar.Wednesday) { calendar.Add(Java.Util.CalendarField.Date, 4); } while (calendar.Get(Java.Util.CalendarField.DayOfWeek) != Java.Util.Calendar.Wednesday) { calendar.Add(Java.Util.CalendarField.Date, 4); } //calendar.Set(Java.Util.CalendarField.DayOfWeek, 1); calendar.Set(Java.Util.CalendarField.HourOfDay, 15); calendar.Set(Java.Util.CalendarField.Minute, 30); Intent managerIntent; PendingIntent pendingIntent; managerIntent = new Intent(this, typeof(AlarmNotificationReceiver)); // pendingIntent = PendingIntent.GetBroadcast(this, 0, managerIntent, 0); pendingIntent = PendingIntent.GetBroadcast(this, 0, managerIntent, PendingIntentFlags.UpdateCurrent); //manager.SetRepeating(AlarmType.RtcWakeup, SystemClock.ElapsedRealtime() + 3000, 60 + 1000, pendingIntent); // manager.SetRepeating(AlarmType.ElapsedRealtimeWakeup, SystemClock.ElapsedRealtime() + AlarmManager.IntervalHalfHour, AlarmManager.IntervalHalfHour, pendingIntent); // manager.SetRepeating(AlarmType.RtcWakeup, calendar.TimeInMillis, AlarmManager.IntervalHalfHour, pendingIntent); manager.SetRepeating(AlarmType.RtcWakeup, calendar.TimeInMillis, 1000 * 60 * 60 * 24 * 7, pendingIntent); 

Answer 1

您正在设置过去的第一个警报。

如果您指定的触发时间是过去的，则会立即触发警报。

您需要将日期设置为下一个星期日。

例：

 using (AlarmManager manager = (AlarmManager)GetSystemService(AlarmService)) using (var calendar = Calendar.Instance) { if (calendar.Get(CalendarField.DayOfWeek) == Calendar.Sunday) calendar.Add(CalendarField.Date, 1); while (calendar.Get(CalendarField.DayOfWeek) != Calendar.Sunday) calendar.Add(CalendarField.Date, 1); calendar.Set(CalendarField.HourOfDay, 02); calendar.Set(CalendarField.Minute, 15); Log.Debug("SO", $"Current date is : {Calendar.Instance.Time.ToString()}"); Log.Debug("SO", $"Alarm will fire at {calendar.Time.ToString()}"); var managerIntent = new Intent(this, typeof(MainActivity)); var pendingIntent = PendingIntent.GetBroadcast(this, 0, managerIntent, PendingIntentFlags.UpdateCurrent); manager.SetRepeating(AlarmType.RtcWakeup, calendar.TimeInMillis, 1000 * 60 * 60 * 24 * 7, pendingIntent); } 

输出：

 [SO] Current date is : Sat Aug 12 23:01:11 PDT 2017 [SO] Alarm will fire at: Sun Aug 13 02:15:11 PDT 2017