onViewCreated
Called immediately after onCreateView has returned, but before any saved state has been restored in to the view. This gives subclasses a chance to initialize themselves once they know their view hierarchy has been completely created.
The fragment's view hierarchy is not however attached to its parent at this point.
Parameters
view
The View returned by onCreateView.
savedInstanceState
If non-null, this fragment is being re-constructed from a previous saved state as given here.