AlarmManager alarm fires immediately

Question

I'm testing AlarmManager to use in my app, and it is firing my Broadcast Receiver immediately when I want it to fire after 1 minute. The code is below:

public class SetMealTimersActivity extends Activity {
    PendingIntent pi;
    BroadcastReceiver br;
    AlarmManager am;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_set_meal_timers);

        br = new BroadcastReceiver() {
            @Override
            public void onReceive(Context c, Intent i) {
                Toast.makeText(c, "Ready to Go!", Toast.LENGTH_LONG).show();
            }
        };
        registerReceiver(br, new IntentFilter("com.ian.mealtimer"));
        pi = PendingIntent.getBroadcast(this, 0, new Intent(
                "com.ian.mealtimer"), 0);
        am = (AlarmManager) (this.getSystemService(Context.ALARM_SERVICE));         
        am.set( AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + 
                60 * 1000, pi );
    }

`Intent intentAlarm = new Intent(this, AlarmReciever.class);AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); //set the alarm for particular time alarmManager.set(AlarmManager.RTC_WAKEUP,time, PendingIntent.getBroadcast(this,1, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT)); where time = 60*1000` — Aniruddha, Jun 02 '14 at 12:37

Eliott Roynette · Answer 1 · 2014-06-02T12:59:43.727

4

try :

  am.set(AlarmManager.RTC_WAKEUP, 
      Calendar.getInstance().getTimeInMillis()+60*1000, pendingIntent);

it is working for me.

edited Jun 02 '14 at 12:59

answered Jun 02 '14 at 12:51

Eliott Roynette

716
8
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I just substituted your code for the last line in my code but it is still not working for me - the Broadcast Receiver is firing immediately ??? – Ian M Jun 02 '14 at 12:55

score 2 · Answer 2 · answered Jan 11 '19 at 15:20

2

If using an exact alarm, make sure it's time is in the future. Otherwise it will fire immediately.

answered Jan 11 '19 at 15:20

Daniel Wilson

18,838
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adboco · Answer 3 · 2014-06-02T12:52:40.590

0

Try changing SystemClock.elapsedRealtime() to System.currentTimeMillis() and AlarmManager.ELAPSED_REALTIME_WAKEUP to AlarmManager.RTC_WAKEUP.

edited Jun 02 '14 at 12:52

answered Jun 02 '14 at 12:28

adboco

2,840
1
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21

That gives me "The method currentTimeInMillis() is undefined for the type System" – Ian M Jun 02 '14 at 12:41
Sorry, it's currentTimeMillis() – adboco Jun 02 '14 at 12:44
Typo - System.currentTimeMillis() was accepted. Still get the same problem though - the Broadcast Receiver fires immediately, rather than 1 minute later – Ian M Jun 02 '14 at 12:45
Change ELAPSED_REALTIME_WAKEUP to RTC or RTC_WAKEUP – adboco Jun 02 '14 at 12:47
Tried that too (both RTC and RTC_WAKEUP). No difference - still fires immediately???? – Ian M Jun 02 '14 at 12:51

score 0 · Answer 4 · answered Jun 02 '14 at 13:16

0

Try to use AlarmManager.setExact(int, long, PendingIntent) if you use Android API > 18 or compile with API < 19, because the time management for this methods changed with API 19. Maybe that helps. Read the documentation for more information.

answered Jun 02 '14 at 13:16

KCD

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setExact (using the same parameters as before) gives exactly the same result - immediate firing of the broadcast receiver :0( – Ian M Jun 02 '14 at 13:48
Did you try to debug your code? Is the BroadcastReceiver really called after AlarmManager.set ? Or is it called immediately after registration of the receiver? – KCD Jun 02 '14 at 14:03
Apologies - my BroadcastReceiver was not actually being called, it was simply that the Activity in which it was defined was being displayed. Sorry for the confusion – Ian M Jun 02 '14 at 16:08

score 0 · Answer 5 · edited Oct 26 '14 at 11:23

make id for pendingIntent as this

pendingIntent = PendingIntent.getActivity(this, 999123266,
    intent, PendingIntent.FLAG_UPDATE_CURRENT);

All example

public void setAlarm_sat(int dayOfWeek1) {
    cal1.set(Calendar.DAY_OF_WEEK, dayOfWeek);
    Intent intent = new Intent(this, RemmemberActivity.class);
    pendingIntent = PendingIntent.getActivity(this, 999123266,
        intent, PendingIntent.FLAG_UPDATE_CURRENT);

    Long alarmTime = cal1.getTimeInMillis();
    AlarmManager am = (AlarmManager) getSystemService(Activity.ALARM_SERVICE);
    am.setRepeating(AlarmManager.RTC_WAKEUP, 
                    alarmTime,7*24 * 60 * 60 * 1000, 
                    pendingIntent);
    // am.set(AlarmManager.RTC, cal1.getTimeInMillis(), pendingIntent);
}

AlarmManager alarm fires immediately

5 Answers5