Android Service and UI Thread

Question

I have a Service running in my app..

This Service has an object for sending message to the server and a function to get that object and use it.

The object is

Answer 1

As far I know, Android service run on UI thread. If you want to make an asynchronous job, you should use Intent Service
See: What is the difference between an IntentService and a Service?
Here is an Intent service example you can try.

Answer 2

Use IntentService instead of Service. If you do network calls in a Service, the UI will stuck. Therefore, use an IntentService since it uses a separate Thread.

And you do not know when a server message will retrieve the data. A NullPointerException could be thrown if objects are accessed as long as network calls are still in progress. Use BroadcastReceivers to fire an Intent whenever a server responds.