BackgroundService.java

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

// BackgroundService.java
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

import com.pinecone.technology.mcommerce.learning.android.chapter06.R;

public class BackgroundService extends Service {
	private static final String TAG = "BackgroundService";
	private NotificationManager notificationMgr;
	private ThreadGroup myThreads = new ThreadGroup("ServiceWorker");

	@Override
	public void onCreate() {
		super.onCreate();

		Log.v(TAG, "in onCreate()");
		notificationMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
		displayNotificationMessage("Background Service is running");
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		super.onStartCommand(intent, flags, startId);
		int counter = intent.getExtras().getInt("counter");
		Log.v(TAG, "in onStartCommand(), counter = " + counter + ", startId = "
				+ startId);

		new Thread(myThreads, new ServiceWorker(counter), "BackgroundService")
				.start();

		return START_NOT_STICKY;
	}

	class ServiceWorker implements Runnable {
		private int counter = -1;

		public ServiceWorker(int counter) {
			this.counter = counter;
		}

		public void run() {
			final String TAG2 = "ServiceWorker:"
					+ Thread.currentThread().getId();
			// do background processing here...
			try {
				Log.v(TAG2, "sleeping for 10 seconds. counter = " + counter);
				Thread.sleep(10000);
				Log.v(TAG2, "... waking up");
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				Log.v(TAG2, "... sleep interrupted");
			}
		}
	}

	@Override
	public void onDestroy() {
		Log.v(TAG,
				"in onDestroy(). Interrupting threads and cancelling notifications");
		myThreads.interrupt();
		notificationMgr.cancelAll();
		super.onDestroy();
	}

	@Override
	public IBinder onBind(Intent intent) {
		Log.v(TAG, "in onBind()");
		return null;
	}

	private void displayNotificationMessage(String message) {
		Notification notification = new Notification(R.drawable.emo_im_winking,
				message, System.currentTimeMillis());

		notification.flags = Notification.FLAG_NO_CLEAR;

		PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
				new Intent(this, StartServiceActivity.class), 0);

		notification.setLatestEventInfo(this, TAG, message, contentIntent);

		notificationMgr.notify(0, notification);
	}
}