Keeping track of a fragment in the activity : <p>in my app there's an Activity with a Navigation Drawer. The selection of the drawer's items brings to the instantiation of related List Fragments. 
When I select an item in the List Fragment, a second Activity begins showing information about the item I clicked. 
Navigating back to the first Activity, it gets created again, but I'd like to keep track of the last fragment showed, with the list from which I selected the item. 
How could I achieve this? Thanks in advance.</p>
