Bluetooth connection in foreground service

Question

I am developing an Android app for connecting to a Bluetooth device with callbacks for button presses. I want to add a foreground service that implements Bluetooth connectivity and gatt connection as well as having the bottom presses.

And all this should happen even if the app is killed or closed.

Edit: The question was a bit vague and not showing my efforts to solve it on my own. But as of 2 years now, it was already completed and accepted an answer from below

Answer 1

• First do check the scenario for foreground services. Is this what you actually need? consider this blog post
• Here's an example of foreground service that you might want to see.
• And this bluetooth overview would help too.