Question

I am setting alarm manager by this method:

public void setAlarmManager(Context context, Intent intent, long repeat) {

        PendingIntent pendingIntent;
        pendingIntent = PendingIntent.getService(context, 0, intent, 0);

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

        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.add(Calendar.SECOND, 10);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
                calendar.getTimeInMillis(), repeat, pendingIntent);
    }

by this method i am sending sms in a specific number after a fixed amount of time.But this method doesn’t remain consistent.Specially when the goes to sleep mode it doesn’t work.how can i make this continous that it will also work in sleep mode?

Answer 1

AlarmManager with a _WAKEUP alarm only guarantees that it will keep the device awake if you use a getBroadcast() PendingIntent.

If your work will take only a handful of milliseconds, switch your Service to a BroadcastReceiver.

If your work will take more than a few milliseconds, consider using my WakefulIntentService, which offers a pattern for allowing _WAKEUP alarms to reliably get their work done.