警报未访问 BroadcastReceiver
Alarm not accessing BroadcastReceiver
我有一个时间选择器来设置闹钟
public class TimePickerFragment : DialogFragment, TimePickerDialog.IOnTimeSetListener
{
public static readonly string TAG = "MyTimePickerFragment";
Action<DateTime> timeSelectedHandler = delegate { };
public static TimePickerFragment NewInstance(Action<DateTime> onTimeSelected)
{
TimePickerFragment frag = new TimePickerFragment();
frag.timeSelectedHandler = onTimeSelected;
return frag;
}
public override Dialog OnCreateDialog(Bundle savedInstanceState)
{
DateTime currentTime = DateTime.Now;
//bool is24HourFormat = DateFormat.Is24HourFormat(Activity);
TimePickerDialog dialog = new TimePickerDialog
(Activity, this, currentTime.Hour, currentTime.Minute, false);
return dialog;
}
public void OnTimeSet(TimePicker view, int hourOfDay, int minute)
{
DateTime currentTime = DateTime.Now;
DateTime selectedTime = new DateTime(currentTime.Year, currentTime.Month, currentTime.Day, hourOfDay, minute, 0);
Log.Debug(TAG, selectedTime.Ticks.ToString());
timeSelectedHandler(selectedTime);
}
}
和这个功能来设置闹钟
private void setAlarm(DateTime time)
{
Intent intent = new Intent(this, typeof(MyReceiver));
PendingIntent pendingIntent = PendingIntent.GetBroadcast(this, RQS_1, intent, 0);
AlarmManager alarmManager = (AlarmManager)GetSystemService(Context.AlarmService);
alarmManager.Set(AlarmType.RtcWakeup, time.Ticks, pendingIntent);
string timeSet = time.Ticks.ToString();
Toast.MakeText(this, timeSet, ToastLength.Short).Show();
}
即使设置的闹钟等于当前时间,也不会调用broadcastreceiver。我试过检查time time set和current time的值,即使当前时间到了set time,broadcastreceiver也不会生效
广播接收器
[BroadcastReceiver]
public class MyReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Toast.MakeText(context, "Time reached!", ToastLength.Short).Show();
}
}
}
我是缺少权限还是其他原因?
更新:感谢 sushihangover 的回答
public class TimePickerFragment : DialogFragment, TimePickerDialog.IOnTimeSetListener
{
public static readonly string TAG = "MyTimePickerFragment";
Action<Calendar> timeSelectedHandler = delegate { };
public static TimePickerFragment NewInstance(Action<Calendar> onTimeSelected)
{
TimePickerFragment frag = new TimePickerFragment();
frag.timeSelectedHandler = onTimeSelected;
return frag;
}
public override Dialog OnCreateDialog(Bundle savedInstanceState)
{
DateTime currentTime = DateTime.Now;
//bool is24HourFormat = DateFormat.Is24HourFormat(Activity);
TimePickerDialog dialog = new TimePickerDialog
(Activity, this, currentTime.Hour, currentTime.Minute, false);
return dialog;
}
public void OnTimeSet(TimePicker view, int hourOfDay, int minute)
{
Calendar calNow = Calendar.Instance;
Calendar calSet = (Calendar)calNow.Clone();
calSet.Set(CalendarField.HourOfDay, hourOfDay);
calSet.Set(CalendarField.Minute, minute);
calSet.Set(CalendarField.Millisecond, 0);
DateTime currentTime = DateTime.Now;
DateTime selectedTime = new DateTime(currentTime.Year, currentTime.Month, currentTime.Day, hourOfDay, minute, 0);
Log.Debug(TAG, selectedTime.Ticks.ToString());
timeSelectedHandler(calSet);
}
}
您正在使用 .Net 的 DateTime 中的 ticks,而 Android 的 AlarmManager 基于 Android/Linux Epoch 毫秒:
查看我对这些其他 SO 的回答,了解如何使用 Android 系统时间或 Android 日历:
我有一个时间选择器来设置闹钟
public class TimePickerFragment : DialogFragment, TimePickerDialog.IOnTimeSetListener
{
public static readonly string TAG = "MyTimePickerFragment";
Action<DateTime> timeSelectedHandler = delegate { };
public static TimePickerFragment NewInstance(Action<DateTime> onTimeSelected)
{
TimePickerFragment frag = new TimePickerFragment();
frag.timeSelectedHandler = onTimeSelected;
return frag;
}
public override Dialog OnCreateDialog(Bundle savedInstanceState)
{
DateTime currentTime = DateTime.Now;
//bool is24HourFormat = DateFormat.Is24HourFormat(Activity);
TimePickerDialog dialog = new TimePickerDialog
(Activity, this, currentTime.Hour, currentTime.Minute, false);
return dialog;
}
public void OnTimeSet(TimePicker view, int hourOfDay, int minute)
{
DateTime currentTime = DateTime.Now;
DateTime selectedTime = new DateTime(currentTime.Year, currentTime.Month, currentTime.Day, hourOfDay, minute, 0);
Log.Debug(TAG, selectedTime.Ticks.ToString());
timeSelectedHandler(selectedTime);
}
}
和这个功能来设置闹钟
private void setAlarm(DateTime time)
{
Intent intent = new Intent(this, typeof(MyReceiver));
PendingIntent pendingIntent = PendingIntent.GetBroadcast(this, RQS_1, intent, 0);
AlarmManager alarmManager = (AlarmManager)GetSystemService(Context.AlarmService);
alarmManager.Set(AlarmType.RtcWakeup, time.Ticks, pendingIntent);
string timeSet = time.Ticks.ToString();
Toast.MakeText(this, timeSet, ToastLength.Short).Show();
}
即使设置的闹钟等于当前时间,也不会调用broadcastreceiver。我试过检查time time set和current time的值,即使当前时间到了set time,broadcastreceiver也不会生效
广播接收器
[BroadcastReceiver]
public class MyReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Toast.MakeText(context, "Time reached!", ToastLength.Short).Show();
}
}
}
我是缺少权限还是其他原因?
更新:感谢 sushihangover 的回答
public class TimePickerFragment : DialogFragment, TimePickerDialog.IOnTimeSetListener
{
public static readonly string TAG = "MyTimePickerFragment";
Action<Calendar> timeSelectedHandler = delegate { };
public static TimePickerFragment NewInstance(Action<Calendar> onTimeSelected)
{
TimePickerFragment frag = new TimePickerFragment();
frag.timeSelectedHandler = onTimeSelected;
return frag;
}
public override Dialog OnCreateDialog(Bundle savedInstanceState)
{
DateTime currentTime = DateTime.Now;
//bool is24HourFormat = DateFormat.Is24HourFormat(Activity);
TimePickerDialog dialog = new TimePickerDialog
(Activity, this, currentTime.Hour, currentTime.Minute, false);
return dialog;
}
public void OnTimeSet(TimePicker view, int hourOfDay, int minute)
{
Calendar calNow = Calendar.Instance;
Calendar calSet = (Calendar)calNow.Clone();
calSet.Set(CalendarField.HourOfDay, hourOfDay);
calSet.Set(CalendarField.Minute, minute);
calSet.Set(CalendarField.Millisecond, 0);
DateTime currentTime = DateTime.Now;
DateTime selectedTime = new DateTime(currentTime.Year, currentTime.Month, currentTime.Day, hourOfDay, minute, 0);
Log.Debug(TAG, selectedTime.Ticks.ToString());
timeSelectedHandler(calSet);
}
}
您正在使用 .Net 的 DateTime 中的 ticks,而 Android 的 AlarmManager 基于 Android/Linux Epoch 毫秒:
查看我对这些其他 SO 的回答,了解如何使用 Android 系统时间或 Android 日历: