Android : Library/jar creation in Android studio which can be used with different projects

I am new to Android Studio and Gradle and the learning curve is a little sharp. I need help with the following,

I have a android application that essentially displays data in a banner after fetching it from my server(fetches images, content etc.).

What I want to do is to create a library that will allow this banner to be deployed by a developer in any application, similar to what admobs does. However, when my banner is clicked, my underlying library which carries its own set of activities(and resources) is run instead of navigating away to a webpage(in case of admob)

How can I achieve my goal of keeping the resources of my application while enabling this functionality for any applications that may use my application as a library.

Can someone please point me in the right direction? I have done a lot of search but didn't come up with anything that could help me achieve this. I am aware of aar, but do not understand how it can be used in my situation.

Thank you.