@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_item_grid, container, false);
    }
Mandatory empty constructor for the fragment manager to instantiate the
fragment (e.g. upon screen orientation changes).
Example/src/com/tonicartos/stickygridheadersexample/ItemListFragment.java