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BestPosts : A unidirectional sate flow example App

Features

  • List of all posts
  • Displaying post detail
  • List of all comments

Architecture

A single state flow pattern (inspired by Kaushik Gopal's model Fragmented ep. 148 and 151) similar to MVI was applied to a clean architecture approach.

The project has three modules :

  • App : Hosting presentation and UI and view state logic.
  • Domain : Hosting domain models and business rules transformation.
  • Data : Hosting data layer models and transformation to domain models, as well as data querying and network related logic.

Dependencies

  • RxJava2 : For reactive streaming and asynchronous operations it was also used to setup the unidirectional data flow pipline between View, ViewModel, Model.
  • Dagger2 : for dependency injection.
  • Glide : For Image loading.

Testing

  • JUnit 4 : Testing framework.
  • Mokito : Mocking framework.
  • Truth : Test assertions.
  • MockWebserver : A webserver for testing api layer.

Future improvements

  • The navigation between Post / Detail could benefit from a shared element transition with the post overview item in the list transitionning and expanding to its final position on the top of the Detail screen.
  • Preserve scroll position on screen rotation.
  • Add espresso end to end tests.

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