Develop Reference

Start of activity through AlarmManager PendingIntent after clearing app process

My app will allow user to set desired time on which activity will trigger. I used AlarmManager to open activity. Below is the code for same.`
/* Intent intent = new Intent(this, AlarmNotificationActivity.class);
PendingIntent pendingIntent=PendingIntent.getActivity(getBaseContext(), RQS_1, intent,
0);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(),interaval, pendingIntent);*/
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent=PendingIntent.getBroadcast(getBaseContext(), RQS_1, intent,
0);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(),interaval, pendingIntent);
If I use the PendingIntent with getActivity even the app killed AlarmNotification is came up.
If I use the PendingIntent with getBroadcast if the app killed AlarmNotification is not coming up.
Question is After clearing the app process from task list
Is it possible to trigger Notification Activity of my app through broadcast.
If Yes - Please share any link or sample code (TIA)
If No - How Clock App in Mobile triggers Alarm on specific time. Do I
need to define service to achieve this.

AlarmManager cancel() does not stop my Alarm

I'm creating the alarm with this code when my widget is added to screen:
alarmMgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, WidgetAlarmReceiver.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
alarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
alarmMgr.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 60000, 60000, alarmIntent);
And I'm deleting the alarm using this code when no more widgets are present on the screen. I'm calling this code on the onReceive method of the AlarmReceiver class. Maybe that is the problem?
AlarmManager alarmMgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent mIntent = new Intent(context, WidgetAlarmReceiver.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0, mIntent, 0);
alarmMgr.cancel(alarmIntent);
The problem is that the alarm is still getting called each minute even doing the cancel call.
What is wrong? The startAlarm code is not getting called anymore so I don't understand why the cancel doesn't works and the alarm gets called again and again.

Finally I solved it, by canceling the alarm from outside the alarm onReceive method itself. Maybe an alarm cannot cancel itself or something.

Canceling alarms from AlarmManager

I am working on application which is get the alarm time from database every 2 AM and then at the specified time the activity shows up, my app works fine, but when I manually change the data/time of the device, previous alarms are triggered and I should prevent to this to happens.
Here is my PendingIntent:
Intent i = new Intent(mContext, AlarmReceiver.class);
PendingIntent pi = PendingIntent.getBroadcast(G.context, _id, i,
PendingIntent.FLAG_UPDATE_CURRENT);
Which each _id is unique and when I make a receiver for date changed event before my alarm cancel method fired previous alarms go off!
Can some body help to solve this problem?

Try this code:
Intent intent = new Intent(this, Mote.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 1253, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); alarmManager.cancel(pendingIntent);

For cancel the alarm:
Intent intent = new Intent(this, Mote.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 1253, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.cancel(pendingIntent);
Edit
Well you can look for the answer and modify as per your requirements:
How to stop Android AlarmManager when there is a manual system time change?
AlarmManager: how to schedule a daily alarm and deal with time changes

Intent intent1 = new Intent(G.context, DailyAlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(G.context,
G.dateTimesetAlarm.getDayOfYear(), intent1, 0);
mAlarmManager.cancel(pendingIntent);
pendingIntent.cancel();

cancel the scheduled android notification

I have scheduled android notifications using alarm manager but I couldn't cancel the notification where I tried to cancel it using this notificationManager.cancelAll(); does not work and then I tried to cancel alarm manager itself, unfortunately, does not work.
Does anyone know how to cancel scheduled notification?
This is how I set alarm manager for notification:
Intent myIntent = new Intent(DirctActivityfinal3.this, MyReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(DirctActivityfinal3.this, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, timeOff9.getTimeInMillis(), pendingIntent);
I tried this code to cancel alarm manager, but not working I still get notified
Intent intent = new Intent(ViewTicketActivity.this, DeleteNotification.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(ViewTicketActivity.this,0, intent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);

Your PendingIntents are not the same.
To cancel an alarm, the pending intent that you created to cancel the alarm with must be the same as the one you created the alarm with.
e,g in your example, You are passing different classes into each.
Intent myIntent = new Intent(DirctActivityfinal3.this, MyReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(DirctActivityfinal3.this, 0, myIntent, 0);
is not the same as
Intent intent = new Intent(ViewTicketActivity.this, DeleteNotification.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(ViewTicketActivity.this,0, intent, 0);
Complete Sample:
Intent myIntent = new Intent(myContext, MyReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(myContext, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
then either
alarmManager.set(AlarmManager.RTC_WAKEUP, timeOff9.getTimeInMillis(), pendingIntent);
or
alarmManager.cancel(pendingIntent);

Declare Intent, PendingIntent and AlarmManager as global variables
to cancel the scheduled
pendingIntent = PendingIntent.getBroadcast(ViewTicketActivity.this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
alarmManager.cancel(pendingIntent);

Canceling alarm manager when service has finished

I want to cancel my alarm-manager, which starts a service, and which I created using following code:
Intent intent = new Intent(getActivity(), CheckStatusService.class);
pintent = PendingIntent.getService(getActivity(), 0, intent, 0);
cal.add (Calendar.MINUTE,1);
alarm = (AlarmManager)getActivity().getSystemService(Context.ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 60*1000, pintent);
I am doing
alarm.cancel(pintent)
and it is not throwing any errors, but the service I started using this Alarmmanager still continues to work.
Once the service is finished, it sends out a broadcast to one of my activities. There it is definitively received, even alarm.cancel() is called, but the service still continues to run.
What am I doing wrong?

I solved my issue by cancelling the alarm within the service by using the following code:
AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(getApplicationContext(), CheckStatusService.class);
PendingIntent pintent = PendingIntent.getService(getApplicationContext(), 0, intent, 0);
alarmManager.cancel(pintent);