I had to stop using the Android-L preview api because it's not working on my Smarphone, a Galaxy Ace III. I found out that it only works with Android's running Android L on the Smartphone. So i'm using API 19 now, the latest one designed for Tablets and Mobile.

Removed an unused Activity.

And finally created a sample activity that shows how the life cycle in this framework is managed, using only onCreate, onPause and onResume.