gistfile1.txt

----- Service class
public class NotifyService extends Service {
  private final int NOTIFICATION_ID = 1;
	
	@Override
	public void onCreate() {
		NotificationManager mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
		//R.drawable.ic_launcher is the icon for this notification
		Notification notification = new Notification(R.drawable.ic_launcher, "This is the message that first appread in the top bar", System.currentTimeMillis());
		Intent myIntent = new Intent(this , MainActivity.class);     
		PendingIntent contentIntent = PendingIntent.getActivity(this, 0, myIntent, 0);
		notification.setLatestEventInfo(this, "This is the label of the notification", "Text to show in the notification", contentIntent);
		//Adding this Flag so that when user clicks on the notification, it closes (cancels)
		notification.flags |= Notification.FLAG_AUTO_CANCEL;
		mNM.notify(NOTIFICATION_ID, notification);
	}
}

----- Creating the alert
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.HOUR, 0);
calendar.set(Calendar.AM_PM, Calendar.AM);
calendar.add(Calendar.DAY_OF_MONTH, 1);

Intent myIntent = new Intent(this , NotifyService.class);     
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
PendingIntent pendingIntent = PendingIntent.getService(this, 0, myIntent, 0);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);


---- AndroidManifest.xml
<service
    android:name=".NotifyService"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
</service>