In first, please spent a litle bit time to read Clean in here: https://fernandocejas.com/2014/09/03/architecting-android-the-clean-way/

This is an example structure how to build Clean Architecture in Android, there are 3 layers:

• app: in presentation layer (app) I use MVP architecture and dagger
• domain: in domain layer(business) it us pure Java and I use RxJava
• data: for data layer (api) I use OKHTTP,retrofit

Terminology

• Use-case - a simple business
• Repository - an interface where the use-case can access data
• RepositoryImpl - an implementation of repository
• CallBack - an interface where the use-case can notify data
• CallBackIpml - an implementation of CallBack.

Example requirement:

• After user logins, customer want to see their profile.
• If the profile is active, application shows it.
• If the customer profile is blocked by system, application shows “profile is blocked ”message to customer.
• If the customer profile is closed, application shows “profile is closed ”message to customer