public class MyService extends Service {

 public static final String TAG = "MyService";

 @Override
 public void onCreate() {
  super.onCreate();
  Notification notification = new Notification(R.drawable.ic_launcher,
    "有通知到来", System.currentTimeMillis());
  Intent notificationIntent = new Intent(this, MainActivity.class);
  PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
    notificationIntent, 0);
  notification.setLatestEventInfo(this, "幻听", "许嵩",
    pendingIntent);
  startForeground(1, notification);

 }
 @Override
 public int onStartCommand(Intent intent, int flags, int startId) {
  return super.onStartCommand(intent, flags, startId);
 }

 @Override
 public void onDestroy() {
  super.onDestroy();
 }

 @Override
 public IBinder onBind(Intent intent) {
  return null;
 }

}