Delete specific ALARM from AlarmManger in Android

Question

I am building a reminder app using alarmManger but I don't know how to delete a specific alarm.

AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 10);
calendar.set(Calendar.MINUTE, 30);

Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
PendingIntent alarmIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);
manager.set(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),pendingIntent);

The Receiver is a normal and simple Receiver.

My problem is that I want to edit/remove an alarm that has been added. I know conceptually how to remove an alarm, but I can't remove a specific alarm in alarmManger when several have been added.

MHP · Accepted Answer · 2015-05-07T21:16:26.280

4

by Id that you set in alarm manager you can access specific alarm, in your code:

AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 10);
calendar.set(Calendar.MINUTE, 30);

Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);

at this line choose ID separate from each other , then you can get specific alarm by it's id

PendingIntent alarmIntent = PendingIntent.getBroadcast(getApplicationContext(), ID, intent, 0);
manager.set(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),pendingIntent);

edited May 07 '15 at 21:16

answered May 07 '15 at 21:10

MHP

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Thank you very much :).How can i set different ID and get the ID for different alarms? – user3997118 May 07 '15 at 21:28
you can keep ids in database when you create a new alarm and then edit or delete it by its id – MHP May 07 '15 at 21:29
and how can i set the id?i can not just throw a number – user3997118 May 07 '15 at 21:35
1

you can use System.currentTimeMillis() as ID and store it in your database – MHP May 07 '15 at 22:07
can you please help me to solve this https://stackoverflow.com/questions/51542099/cant-stop-the-ringing-alarm-from-another-activity#51542099 @MHP – Zhu Jul 26 '18 at 15:57

score 3 · Answer 2 · answered May 07 '15 at 21:12

3

You have to set unique requestCode for the PendingIntent :

to set:

PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext,
            11111, intent,
            PendingIntent.FLAG_UPDATE_CURRENT);

to cancel :

PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext,
            11111, intent,
            PendingIntent.FLAG_UPDATE_CURRENT);
    alarmManager.cancel(pendingIntent);

answered May 07 '15 at 21:12

A.AL

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Thank you very much :).How can i set different ID and get the ID for different alarms? – user3997118 May 07 '15 at 21:28

jcuenod · Answer 3 · 2015-05-07T21:23:50.880

1

You need to have an unique id (requestCode), specific to the alarm you want to cancel. I've called that id customId. Pass that id to your intent (rather than passing 0 as you currently do).

PendingIntent alarmIntent = PendingIntent.getBroadcast(getApplicationContext(), customId, intent, 0);

store customId however you want but you can later get the alarm using the flag PendingIntent.FLAG_UPDATE_CURRENT:

PendingIntent alarmIntent = PendingIntent.getBroadcast(getApplicationContext(), customId, intent, PendingIntent.FLAG_UPDATE_CURRENT)

And then you can do what you want to alarmIntent. In your code your Alarm Manager is called manager so you would call:

manager.cancel(alarmIntent);

edited May 07 '15 at 21:23

answered May 07 '15 at 21:12

jcuenod

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I have tried above, setting alarm is working and also shows notification but deleting causes all alarms to delete. I have checked by break point debugging that my list's items values are always unique wrt position. [gist here](https://gist.github.com/talhahasanzia/42a3e9ef0fa239cda06511a9571c18b3) Kindly have a look at my methods. – Talha Sep 05 '17 at 15:21

score 1 · Answer 4 · edited Nov 14 '18 at 08:05

1

When canceling the AlarmManager do not use a PendingIntent with a flag of FLAG_CANCEL_CURRENT. Instead, cancel the PendingIntent explicitly after canceling the alarm:

am = (AlarmManager) getSystemService(getApplicationContext().ALARM_SERVICE);
Intent i = new Intent(getApplicationContext(),AlarmReceiver.class);
PendingIntent p = PendingIntent.getBroadcast(getApplicationContext(), 0, i, 0);
am.cancel(p); p.cancel();`

edited Nov 14 '18 at 08:05

AwaisMajeed

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answered May 07 '15 at 21:13

Ibrahim Sušić

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Actually, it's not needed to call `p.cancel()`. All you need is `am.cancel(p)`. Also, using `FLAG_CANCEL_CURRENT`, or not, is strictly for updating or removing the Intent extras associated with the PendingIntent. See this: http://stackoverflow.com/questions/14029400/flag-cancel-current-or-flag-update-current/14036621#14036621 – Daniel Nugent May 07 '15 at 21:20
yup, PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, alert.idAlert, intent, PendingIntent.FLAG_UPDATE_CURRENT) PendingIntent.FLAG_CANCEL_CURRENT – Ibrahim Sušić May 07 '15 at 21:24
That being said, if you create an alarm with a PendingIntent that uses `FLAG_CANCEL_CURRENT`, you have to use it again when cancelling the alarm. – Daniel Nugent May 07 '15 at 21:26
*Never* use FLAG_CANCEL_CURRENT when working with PendingIntents that are used by alarms. See http://stackoverflow.com/questions/14029400/flag-cancel-current-or-flag-update-current/39926854#39926854 for more details. – ctate Feb 17 '17 at 23:21
I have tried above, setting alarm is working and also shows notification but deleting causes all alarms to delete. I have checked by break point debugging that my list's items values are always unique wrt position. I have also tried adding `p.cancel();` [gist here](https://gist.github.com/talhahasanzia/42a3e9ef0fa239cda06511a9571c18b3) Kindly have a look at my methods. – Talha Sep 05 '17 at 15:22

score 0 · Answer 5 · answered May 07 '15 at 21:23

0

That's simple.Just give a specific request code on creating on creating pending intent for each alarm.like PendingIntent alarmIntent = PendingIntent.getBroadcast(getApplicationContext(), your specific code e.g 1001, intent, 0);

and when you want to delete the alarm just create a pending intent with that specific code and cancel it. PendingIntent alarmIntent = PendingIntent.getBroadcast(getApplicationContext(), your specific code e.g 1001, intent, 0); alarmMgr.cancel(alarmIntent);

I hope this will help you.

answered May 07 '15 at 21:23

Zohaib Hassan

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Thank you very much :).How can i set different ID and get the ID for different alarms? – user3997118 May 07 '15 at 21:31
U Welcome.If you are setting multiple alarms then set those alarms in a loop and use the counter of loop as request code in pending intent.and when you want to remove then use the same logic.again start a loop.and use the counter as request code in pending intent.But take care of one thing that the logic should be same at both time. – Zohaib Hassan May 08 '15 at 20:17

Delete specific ALARM from AlarmManger in Android

5 Answers5