Callback for Android device from REST Api

Question

I have the following architecture:

There is my backend (spring boot), with can receive data from my client (android device) over a REST api and it also provide data over the REST api.

The data which are provided, change from time to time, without a dependency from the data the client send.

Is it now possible in android to write a callback for the data which the backend provided?

You could do it with a button, but I want to get the new data automatically when ever they change. How would you do it, with a timer/interval?

For example I know Firebase (from Google), where you can do something like this, there you can define a callback and get the new data when ever they change...something like this is what I want.

you can use firebase notifcations to notify your app to get the new data — njzk2, Jul 18 '16 at 15:57

score 1 · Accepted Answer · edited May 23 '17 at 10:29

This is a typical PUSH scenario, in which your app must be notified when data changes in server side.There are different approaches:

Polling (implementing a service or alarm manager, there is a good example in this post Alarm Manager Example)
FCM (which is the new version of GCM under the Firebase brand), that provides both the server and device components you need to make this messaging system work. https://firebase.google.com/docs/cloud-messaging/

I would recommend you to use FCM to implement this scenario, without degrading performance or wasting battery life by polling the server.

score 0 · Answer 2 · answered Jul 18 '16 at 15:49

0

You could probably do it with WebSockets but there isn't an out-of-the-box solution like with Firebase, no.

answered Jul 18 '16 at 15:49

Miloš Milivojević

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Callback for Android device from REST Api

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