Pending intent with ONE_SHOT flag
Yes, of course you can create it again. You will get a different PendingIntent
from the first one.
However, there are a few problems with the code you've posted. First of all, you create the PendingIntent
like this:
pendingIntent = PendingIntent.getBroadcast(context,
PENDING_INTENT_RETRY, myIntent, PendingIntent.FLAG_ONE_SHOT);
but you check if it exists like this:
pendingIntent = PendingIntent.getBroadcast(context,
0, myIntent, PendingIntent.FLAG_NO_CREATE);
This check will always return null because you are using a different requestCode
! When you create the PendingIntent
you pass PENDING_INTENT_RETRY
as requestCode
, but when you check if it exists you pass 0 as requestCode
.
The second problem is the way FLAG_ONE_SHOT
works. If you create a PendingIntent
using FLAG_ONE_SHOT
and then try to get a PendingIntent
using FLAG_NO_CREATE
, it will always return null, even if the PendingIntent
has not yet been used! Because of this behaviour, you cannot use FLAG_NO_CREATE
to determine if an alarm is pending, if you have set that alarm using a PendingIntent
created with FLAG_ONE_SHOT
.
If you really want to use this architecture, then you cannot use FLAG_ONE_SHOT
. Just create the PendingIntent
normally (without flags) and check for its existence using FLAG_NO_CREATE
.
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greywolf82
What can I say? The only thing I know is that I don't know everything.
Updated on June 04, 2022Comments
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greywolf82 about 2 years
Currently I've got this code:
public static void setupAlarm(Context context) { Intent myIntent = new Intent(context, Receiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, myIntent, PendingIntent.FLAG_NO_CREATE); if (pendingIntent != null) { return; } else { pendingIntent = PendingIntent.getBroadcast(context, PENDING_INTENT_RETRY, myIntent, PendingIntent.FLAG_ONE_SHOT); } AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(System.currentTimeMillis()); calendar.add(Calendar.MINUTE, 2); alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent); }
What I want is to use pending intent one time and wait for the fire. If in the meantime someone asks for a new alarm, if the alarm exist I don't want to setup anything. Now my question: after the first alarm, the pending intent is deleted due to the ONE_SHOT flag, but can I create the pending intent again or not?
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M-Wajeeh over 4 years"To retrieve an existing PendingIntent created with FLAG_ONE_SHOT, both FLAG_ONE_SHOT and FLAG_NO_CREATE need to be supplied." developer.android.com/reference/android/app/PendingIntent
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David Wasser over 4 years@M-WaJeEh Very interesting. I wonder if that is something newly added to the documentation as I don't ever remember seeing that. Answers some previous confusion of course. Thanks for that Info!