Android Service and Broadcast Receiver Tutorial

This tutorial describes how to create and consume Androidservices. It is based on Eclipse 3.6, Java 1.6 and Android 2.3(Gingerbread).

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<Button android:text="Reload Data" android:id="@+id/button1"
		android:layout_width="wrap_content" android:layout_height="wrap_content"
		android:onClick="showServiceData"></Button>
	<ListView android:id="@+id/list" android:layout_width="match_parent" android:layout_height="match_parent"></ListView>
</LinearLayout>

Change the activity ServiceConsumer to the following. 

package de.vogella.android.ownservice;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class ServiceConsumer extends Activity {
	private WordService s;
	private ArrayList<String> values;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		doBindService();
		values = new ArrayList<String>();
		adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_1, values);
		ListView list = (ListView) findViewById(R.id.list);
		list.setAdapter(adapter);

		// List<String> wordList = s.getWordList();
		// Toast.makeText(this, wordList.get(0), Toast.LENGTH_LONG).show();
	}

	private ServiceConnection mConnection = new ServiceConnection() {

		public void onServiceConnected(ComponentName className, IBinder binder) {
			s = ((WordService.MyBinder) binder).getService();
			Toast.makeText(ServiceConsumer.this, "Connected",
					Toast.LENGTH_SHORT).show();
		}

		public void onServiceDisconnected(ComponentName className) {
			s = null;
		}
	};
	private ArrayAdapter<String> adapter;

	void doBindService() {
		bindService(new Intent(this, WordService.class), mConnection,
				Context.BIND_AUTO_CREATE);
	}

	public void showServiceData(View view) {
		if (s != null) {
			List<String> wordList = s.getWordList();
			values.clear();
			values.addAll(wordList);
			adapter.notifyDataSetChanged();
		}
	}
}

5. Thank you