Service getting stopped even after using Alarm Manager

I need to run some functionality in my service all the time.

So I have used Alarm Manager to make my Service alive.

I am using invoking Service for each 30 mins.

But If I keep my android device idle for long time( I tested by kept the device idle for overnight) I observed that my Service is not executing my functions.

I can 开发者_Python百科see the logs only upto nearly 2 hour's but after that my Service not running..

I just want know that how I can make my Service alive all the times..

Pl. help in this.

Application Services cannot be persisted. http://www.androidguys.com/2009/09/09/diamonds-are-forever-services-are-not/

You have 3 options ([http://engineersaredumb.blogspot.com/2011/02/persistent-services-in-android.html][1] by https://stackoverflow.com/users/638122/andrew)

1. If you need services to wake up regularly, work and die, use the AlarmManager
2. If you need need your service to run continuously for a limited period of time, like a Music player, setForeground() on the service
3. If you need your service to keep running, but you can live with interruptions from time to time, return START_STICKY from onStartCommand()

All in all, Android will not let your Service run forever (unless it is a System service) .