public class FragmentOne extends Fragment {

​

private FragmentToActivity mCallback;

​

​

@Override

public void onAttach(Context context) {

    super.onAttach(context);

    try {

        mCallback = (FragmentToActivity) context;

    } catch (ClassCastException e) {

        throw new ClassCastException(context.toString()

                + " must implement FragmentToActivity");

    }

}

​

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, 

Bundle savedInstanceState) {

    View v = inflater.inflate(R.layout.fragment_login, container, 

false);

sendData("Andrews");

​

return v;

}

@Override

public void onDetach() {

    mCallback = null;

    super.onDetach();

}

​

public void onRefresh() {

    Toast.makeText(getActivity(), "Fragment : Refresh called.",

            Toast.LENGTH_SHORT).show();

  }

private void sendData(String comm)

    {

    mCallback.communicate(comm);

​

    }

​

 }

​

​

}