Android:ActionBarActivity findViewById return NULL

Question

I can\'t to get the button from fragment, what\'s wrong? Recieve a uncaught exception - nullpointerexception; Button can\'t be found.

Early all will be find, but aft

Answer 1

You are trying to search inside Activity's layout, and your widgets are inside a Fragment's layout.

Put your logic inside your PlaceHolderFragment class:

public static class PlaceholderFragment extends Fragment implements OnClickListener {

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container,
                false);

        mplayer = new MediaPlayer();
        rgroup = (RadioGroup) rootView.findViewById(R.id.radioGroup1);

        play = (Button) rootView.findViewById(R.id.play);
        pause = (Button) rootView.findViewById(R.id.pause);

        play.setOnClickListener(this);
        pause.setOnClickListener(this);

        return rootView;
    }

    @Override
    public void onClick(View v) {

    } 
}

P.S. Салам алейкум =)