Error in 9.16 List and following

#1

The error is in this line:
mCrimeReciclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
if I commented this line appears the old Activity.
The error that I had is:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method ‘void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)’ on a null object reference
at com.bignerdranch.android.criminalintent.CrimeListFragment.onCreateView(CrimeListFragment.java:27)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2184)

I added the libraries yet.

#2

Sorry, I get solved this problem . The problem was that I put in the code
View view= inflater.inflate(R.layout.fragment_crime,container,false);
and it had to be:
View view= inflater.inflate(R.layout.fragment_crime_list,container,false);

Thank You