Expenses Example

Example project to test MVP approach with interchangeble pure Android view and React native implementations Business logic and networking implemented in Android.

What was the goal of this approach:

• Exchangable view implementation (android / react-native) without changing business logic
• Domain model is separated from networking with mappers
• Views are completely passive
• All layers should be unit testable

Code structure (packages):

• networking - contains retrofit service, networking model
• usecase - contain business logic contained in use case classes
• view/<feature>/*Presenter - contains presentation layer logic
• view/<feature>/*View and *ViewImpl - contains passive view interface and implementation
• view/<feature>/*Activity - just an aggregator and lifecycle owner for above classes

Added two unit test classes for test examples: GetFilteredExpenseListUseCaseTest.kt ExpenseDetailsPresenterTest.kt

Libraries used:

• Glide - to load images
• Retrofit - for networking
• RxJava - for networking wrapper and use cases
• Dagger2 - dependency injection

Notes:

• Only android project was implemented, iOS is not in scope of this example

TODO:

• use Dagger2 for dependency injection