Simple Mobile App for Uni

I need this app done in 2-3 days. It shouldn't be hard to be done as it is really simple.

Project requirements:
1. Have at least 2 activities - this is already done in the example project I have given.
2. Use fragments - so you would have to rework a bit from the example projects or add a favourites activity that uses fragments.
3. Use an API - the example project already pulls the books from Google Books API so that's done.
4. Have at least one Service
5. Save and get data from SQLite Database - this is why I need a favourites activity, for a usecase for the SQLite DB.

The app must be written on Java and work on Android 10.

You can use this project as a template.

https://www.geeksforgeeks.org/how-to-build-a-book-library-app-using-google-books-api-in-android/

On top of it I need a new activity where people can add books to their favourites list.
For example when they open the details about a book, instead of a Buy Buton I would need there to be a Add To Favourites button.

It must save books marked as favourites to a simple SQLite Database.

I also would need the app to use at least one Service. Doesn't matter what the service will be, even the simplest thing will do the job.