dd two “buttons” using Android core icons (Search and Add) to the Actionbar.
Clicking Search should open a search fragment and replace the grid fragment
Clicking Add should fire a new activity for Add (again, your activity should have the activity/fragment example)
Make sure you manage the up navigation with the home icon (this is what happens when you click the logo on the top left corner with the arrow) See http://developer.android.com/training/implementing-navigation/ancestral.html