CODEWITHSUNDEEP
android
Sumit Marwha
Sumit Marwha

Reputation: 313

AlarmManager not calling BroadcastReceiver after specific interval of time

I want to call a BroadcastReceiver after specific interval of time. BroadcastReceiver is calling but it is not calling exactly after 10 seconds sometimes it call is 20 sec sometimes more than 20 seconds. I want to call BroadcastReceiver exactly after 10 seconds

This is the code of MainActivity

Intent myIntent = new Intent(MainActivity.this, SampleReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent,0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, wakeupTime,1000 * 10, pendingIntent);

This is code of broadcastreceiver 

public class SampleReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.e("Brodcast","receiver");
    }
}

This is my log file

09-05 14:48:21.444 18222-18222/com.loconav.partners.tracker E/Brodcast: receiver
09-05 14:49:21.509 18222-18222/com.loconav.partners.tracker E/Brodcast: receiver
09-05 14:50:31.578 18222-18222/com.loconav.partners.tracker E/Brodcast: receiver
09-05 14:51:21.618 18222-18222/com.loconav.partners.tracker E/Brodcast: receiver

Upvotes: 1

Views: 563

Answers (4)

earthw0rmjim
earthw0rmjim

Reputation: 19417

From the documentation of AlarmManager:

Note: Beginning with API 19 (KITKAT) alarm delivery is inexact: the OS will shift alarms in order to minimize wakeups and battery use. There are new APIs to support applications which need strict delivery guarantees; see setWindow(int, long, long, PendingIntent) and setExact(int, long, PendingIntent). Applications whose targetSdkVersion is earlier than API 19 will continue to see the previous behavior in which all alarms are delivered exactly when requested.

Exact repeating is not possible currently with a single set of an alarm on API level 19+.

If you would like your repeating alarm to fire exactly when you want it, then you should use setExact() (or setExactAndAllowWhileIdle() according to your needs) and reschedule it every time it fires.

Upvotes: 2

Ruthwik Warrier
Ruthwik Warrier

Reputation: 94

I don't know whats in wakeupTime. The code works for me as

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),1000*10,pendingIntent);

Upvotes: 1

Prashant Sharma
Prashant Sharma

Reputation: 1407

I thinking you have to provide unique request code to get broadcast method.

Intent myIntent = new Intent(MainActivity.this, SampleReceiver.class);
                PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, uniqueRequestCode, myIntent,0);
                AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
                alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, wakeupTime,1000 * 10, pendingIntent);

uniqueRequestCode could be the System.currentTimeInMilliSecond

Upvotes: 0

Petrov Dmitrii
Petrov Dmitrii

Reputation: 228

First, use ELAPSED_REALTIME_WAKEUP type, because you don't need fire alarm at a specific time of day. When you use rtc time, it can be updated by the system - when it syncs with time server, and your alarm could be never fire up at all.

Second, do not use BroadcastReceivers defined as subclasses of Activity - they should be set up in AndroidManifest.xml, because if your activity is destroyed - you will never receive your Intent.

Upvotes: 0

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