HelloService.java

package com.pinecone.technology.mcommerce.learning.android.chapter06.service;

import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.Process;
import android.widget.Toast;

public class HelloService extends Service {
	private Looper mServiceLooper;
	private ServiceHandler mServiceHandler;

	// Handler that receives messages from the thread
	private final class ServiceHandler extends Handler {
		public ServiceHandler(Looper looper) {
			super(looper);
		}

		@Override
		public void handleMessage(Message msg) {
			// Normally we would do some work here, like download a file.
			// For our sample, we just sleep for 5 seconds.
			long endTime = System.currentTimeMillis() + 5 * 1000;
			while (System.currentTimeMillis() < endTime) {
				synchronized (this) {
					try {
						wait(endTime - System.currentTimeMillis());
					} catch (Exception e) {
					}
				}
			}
			// Stop the service using the startId, so that we don't stop
			// the service in the middle of handling another job
			stopSelf(msg.arg1);
		}
	}

	@Override
	public void onCreate() {
		// Start up the thread running the service. Note that we create a
		// separate thread because the service normally runs in the process's
		// main thread, which we don't want to block. We also make it
		// background priority so CPU-intensive work will not disrupt our UI.
		HandlerThread thread = new HandlerThread("ServiceStartArguments",
				Process.THREAD_PRIORITY_BACKGROUND);
		thread.start();

		// Get the HandlerThread's Looper and use it for our Handler
		mServiceLooper = thread.getLooper();
		mServiceHandler = new ServiceHandler(mServiceLooper);
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		Toast.makeText(this, "My service starting !", Toast.LENGTH_SHORT)
				.show();

		// For each start request, send a message to start a job and deliver the
		// start ID so we know which request we're stopping when we finish the
		// job
		Message msg = mServiceHandler.obtainMessage();
		msg.arg1 = startId;
		mServiceHandler.sendMessage(msg);

		// If we get killed, after returning from here, restart
		return START_STICKY;
	}

	@Override
	public IBinder onBind(Intent intent) {
		// We don't provide binding, so return null
		return null;
	}

	@Override
	public void onDestroy() {
		Toast.makeText(this, "service done", Toast.LENGTH_SHORT).show();
	}
}