I have a few questions.
I am using fragment in fragment frame. 
And I want to create a inner fragment in the child fragment of a parent fragment. Is this method efficient?  For A fragment in fragment, I use childFragmentManager(). And I add a fragment in child fragment using childFragmentManager(). 
I don't know whether my method is efficient or not. If you have a good idea to solve this situation, help me plz...