Question

I have an IntentService that is initially started with the click on a button:

        Intent intent = new Intent(this, ProximityService.class);
        intent.putExtra("com.hybris.proxi.triggerTime", 5000l);
        PendingIntent pendingIntent = PendingIntent.getService(this,  0,  intent, 0);
        long trigger = System.currentTimeMillis() + (5*1000);
        alarmManager.set(AlarmManager.RTC_WAKEUP, trigger, pendingIntent);

This works nicely. But then I am trying to execute the same intentservice again, from within the intentservice. The idea here is that I can vary the next execution time to save battery.

@Override
protected void onHandleIntent(Intent intent) {
    Log.d("demo", "ProximityService... STARTING");
    Log.d("demo", "Intent has extra with key com.hybris.proxi.triggerTime" + intent.hasExtra("com.hybris.proxi.triggerTime"));

    long lastTriggerTime = intent.getLongExtra("com.hybris.proxi.triggerTime", -1);
    Log.d("demo", "Last trigger time: " + lastTriggerTime);

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

    //trigger me again - TODO change this based on closeness to store
    //TODO does not work, somehow triggertime is not incremented
    if (lastTriggerTime < 50000)
    {
        long newTriggerTime = lastTriggerTime * 2;

        Intent serviceIntent = new Intent(this, ProximityService.class);
        serviceIntent.putExtra("com.hybris.proxi.triggerTime", (long)newTriggerTime);
        Log.d("demo","New triggerTime set in new intent is : " + serviceIntent.getLongExtra("com.hybris.proxi.triggerTime", -1));

        PendingIntent pendingIntent = PendingIntent.getService(this,  0,  serviceIntent, 0);
        long trigger = System.currentTimeMillis() + newTriggerTime;
        alarmManager.set(AlarmManager.RTC_WAKEUP, trigger, pendingIntent);
        Log.d("demo", "Alarm was set with trigger time " + newTriggerTime);
    } 
    else {
        Log.d("demo", "Not rescheduling alarm: lastTriggerTime is " + lastTriggerTime);
    }


    Log.d("demo", "ProximityService... DONE");

}

The problem is that

intent.getLongExtra(“com.hybris.proxi.triggerTime”, -1);

always returns the initial value 5000 – so the next alarm is not scheduled at an inceasing trigger time. Somehow, the setting of the intent extra for the new trigger time does not work…

Any ideas?

Answer 1

You need to Use PendingIntent.FLAG_UPDATE_CURRENT

Change your code from
PendingIntent pendingIntent = PendingIntent.getService(this, 0, serviceIntent, 0);
to

PendingIntent pendingIntent = PendingIntent.getService(this,
                        0,  serviceIntent, PendingIntent.FLAG_UPDATE_CURRENT);