How to initialize OnClickListener on included layout inside fragment? : this is representation of my app layout:<br><br>
[![layout][2]][2]


Where should I create onclicklisteners for included layouts? I tried inside the fragment but I could not get through with findViewById. So I tried from Main Activity but Im not sure how to get to included layouts from there.

I also tried this inside the fragment:
    
    public class MainMenu extends Fragment implements View.OnClickListener{

    View button_call;

    @Override
    public View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedinstanceState) {
        View myView = inflater.inflate(R.layout.fragment_main_menu, container, false);
        button_call = myView.findViewById(R.id.btn_call);
        button_call.setOnClickListener(this);
        return myView;
    }

    @Override
    public void onClick(View v) {
        // implements your things
    }


    public MainMenu() {

    }

    }

But then Fragment seems to be empty

  [2]: https://i.stack.imgur.com/0OUDG.png