SelectorFragment

public class SelectorFragment extends Fragment {

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

        Button button1 = (Button) fragment.findViewById(R.id.button1);

        button1.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                getFragmentManager().beginTransaction().replace(R.id.detail_holder, new DetailsFragment(), "stuff").commit();
            }

        });


        return fragment;
    }
}