active
The R.id of the item shown while collapsed — the last item the user tapped from the expanded menu. null (or an id no longer in the item list) falls back to the first selected item, then the first item.
The R.id of the item shown while collapsed — the last item the user tapped from the expanded menu. null (or an id no longer in the item list) falls back to the first selected item, then the first item.