Keep my app checking for Webservice updates

Question

So my question is this::

Assuming I have a list RecycleView of users in my application, where this list is filled through a request to my WebService.

I would like my application to be 'checking' when a new user is added to the server and warns me to my application.

Which way should I go?

What exactly should I study? Services? Content Provider? Boradcast Recivers? or something else?

Answer 1

I have a similar case and I’m going to solve it with https://developers.google.com/cloud-messaging/

Basically, it is a service that allows sending messages from the server to the mobile device and from the device to the server.