Calling another screen on android

public static class PlaceholderFragment extends Fragment {

    public PlaceholderFragment() { }

    @Override
    public View onCreateView(
            LayoutInflater inflater, 
            ViewGroup container,
            Bundle saveInstanceState) {

        View rootView = 
                inflater.inflate(R.layout.fragment_main, container, false);

        Button btnNumberGuessGame = 
                rootView.findViewById(R.id.btnNumberGuessGame);

        btnNumberGuessGame.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = 
                        new Intent(getActivity(), NumberGuessGame.class);
                getActivity().startActivity(intent);
            }
        });
        return rootView;
    }
}

You are not calling another screen, theoretically the code is "right."