Recycler View Not Showing

Question

I have been making an app that uses a recycler view in a navigation drawer how the contents of the recycler view have not been showing up. The view is definitely their as I

Answer 1

Replace following line

 mRecyclerView.setAdapter(adapter);
 mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

with

mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));    
mRecyclerView.setAdapter(adapter);