MyListFragment.java

package com.pinecone.technology.mcommerce.learning.android.chapter03;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class MyListFragment extends Fragment {

	private OnItemSelectedListener listener;

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		View view = inflater.inflate(R.layout.fragment_rsslist_overview,
				container, false);
		Button button = (Button) view.findViewById(R.id.button1);
		button.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				updateDetail();
			}
		});
		return view;
	}

	public interface OnItemSelectedListener {
		public void onRssItemSelected(String link);
	}

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);
		if (activity instanceof OnItemSelectedListener) {
			listener = (OnItemSelectedListener) activity;
		} else {
			throw new ClassCastException(activity.toString()
					+ " must implemenet MyListFragment.OnItemSelectedListener");
		}
	}

	// May also be triggered from the Activity
	public void updateDetail() {
		// Create fake data
		Date date = new Date(System.currentTimeMillis());
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",
				Locale.CHINA);
		String time = sdf.format(date);
		// Send data to Activity
		listener.onRssItemSelected(time);
	}
}