Todo Application

A sample android app that shows how to use ViewModels and Room together with RxJava & Pure Depdency Injection, in Java by Clean Architecture.

Implemented by Clean Architecture

• Presentation (Activity/Fragment and ViewModel)
• Domain (Interactor/Usecases, Repository Interface and Model classes)
• Data (Local/remote datastore and Respository implementation)

Dependecy between compoents

Activity/Fragment --> ViewModel --> Usecase(Interactor) --> Repository --> LocalDataStore(Room DB)

Communication between layers

1. UI calls method from ViewModel.
2. ViewModel executes Use case.
3. Use case combines data from Album and Photo Repositories.
4. Each Repository returns data from a Data Source (Cached or Remote).
5. Information flows back to the UI where we display the list of posts.

Other important components

• Navigator
• ResourceManger

Scenario

At a glance:

• Use can either Register or Login if already registered
• Once authenticated, show list of todos with option to add new todo
• Once tap on each item, show edit/delete todo screen

References

Room Unit testin - https://proandroiddev.com/testing-the-un-testable-and-beyond-with-android-architecture-components-part-1-testing-room-4d97dec0f451