Recycler View Not Showing

The issue is that you are returning the item count as 0 which tells that there is no rows to show. You should return the size of the List as shown below.

    @Override
    public int getItemCount() {
        return data.size();
    }

Replace following line

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

with

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

I agree that you need to return the correct item number but I think you might have a problem with setting the recycler view's height to wrap_content as well. I found this link very helpful. Hope it helps.