How to show notification from background service?

Question

The project I am working on has two different apps, 1 is server and other is client. Server app has 1 service class, which initiates server thread in onStartCommand() function. Class for server thread is defined in service class itself. Whenever server receives any data from client it stores in the database. So problem is, I want to notify user that new data has been arrived through notification or toast message whichever possible. Also tell me where should I write code for notification, whether I should write in service class or thread class or firstActivity class from which i am starting server service. Thank you.

Answer 1

First you need to read this article on how to use Notifications.

Next use this to send a Notification, you can write this code in the service class at the point where you receive some data from the client.

NotificationManager notificationManager =
    (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
int icon = R.drawable.notification_icon;
CharSequence notiText = "Your notification from the service";
long meow = System.currentTimeMillis();

Notification notification = new Notification(icon, notiText, meow);

Context context = getApplicationContext();
CharSequence contentTitle = "Your notification";
CharSequence contentText = "Some data has arrived!";
Intent notificationIntent = new Intent(this, YourActivityThatYouWantToLaunch.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);

int SERVER_DATA_RECEIVED = 1;
notificationManager.notify(SERVER_DATA_RECEIVED, notification);