FragmentA.java

package com.example.abhishek.fragmentmodularui;

import android.annotation.TargetApi;
import android.app.Fragment;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;

/**
 * Created by ABHISHEK on 04-08-2015.
 */

@TargetApi(Build.VERSION_CODES.HONEYCOMB)

public class FragmentA extends Fragment implements AdapterView.OnItemClickListener {

    ListView listView;
    Communicator communicator;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_a,container,false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        communicator = (Communicator)getActivity();
        listView = (ListView)getActivity().findViewById(R.id.listView);
        ArrayAdapter arrayAdapter = ArrayAdapter.createFromResource(getActivity(),R.array.titles,android.R.layout.simple_list_item_1);
        listView.setAdapter(arrayAdapter);
        listView.setOnItemClickListener(this);

    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int i, long id) {
        communicator.respond(i);
    }
}