WBPO Sample Android App

Prerequisites

• Android SDK 33
• Java 11

Used dependencies

• Standard XML view based system
• Kotlin, Coroutines
• MVVM, LiveData, Flow, Data Binding
• Material Design 3 for UI
• Dagger for Dependency Injection
• Retrofit as a REST client
• Coil for image loading
• Paging 3 for optimized loading of lists from paginated data sources

App content

App contains two screens:

• User Login / Registration (UserLoginFragment)
  • can switch between login or registration
  • by taping on logo, form is prefilled with working credentials
• User List (UserListFragment)
  • displays paginated list of users with placehlders
  • handling network error withy retry functionality and auto retry when network is available again
  • grid will have two columns in larger screen (e.g. landscape on phone or portrait on tablet)
  • storing User following status persistently

Things to do

1. Tweak login screen
   • displaying errors near inputs
   • use Coordinator Layout for screen
   • better UX for loading indication
2. Tweak list screen
   • extract some of the code into helpers
   • don't mutatate User.isFollowed but update it in data source with potential error handling
   • option to refresh list
3. New User Details screen - master-detail on tablet or new screen with transition on phone
4. Use "Single live events" but must handle loading error / dialogs on orientation change.