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?
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
.