Local service or remote service?

Question

I have a background Service which must run permanently. The service just has to interact with my Activity.

1. How to i check on activity resume if the service is

Answer 1

Why do you want to know if the Service is running? If you need something from it, just throw an Intent and if it's not running it will start by the intent.

In relation with the second question:

Your service will not "die" when your Activity closes.