android hide toolbar in specific fragment

I have a problem that I don't know how to solve. How do you hide a toolbar in a specific fragment, I have already been searching around on the internet and what I found was communicating activity and fragment would solve it. But it doesn't work for me at all, here is my code: main_activity: ``` public class MainActivity extends ActionBarActivity implements like_frag.OnHideToolbar{ .... public void onHidingToolbar(int position){ Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar); if(toolbar == null){ getSupportActionBar().hide(); }else{ getSupportActionBar().hide(); } } ``` like_frag.java ``` public class like_frag extends Fragment { OnHideToolbar mCallback; Toolbar toolbar; public interface OnHideToolbar { public void onHidingToolbar(int position); } public void onAttach(Activity activity){ try{ mCallback = (OnHideToolbar) activity; }catch(ClassCastException e){ throw new ClassCastException(activity.toString() + "error implementing"); } } public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){ View rootView = inflater.inflate(R.layout.swipefrag, container, false); toolbar = (Toolbar)getActivity().findViewById(R.id.toolbar); return rootView; } @Override public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); } } ``` thanks in advance. I have a drawer inside the toolbar.