In the Android developer world there are numerous ways to bridge the gap between ViewModels and views (XML or Composables) and perhaps even more techniques to manage their states. Throughout my…

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The post discusses effective strategies for managing Android screen states using ViewModels and sealed classes. The approach leverages intermediate streams to create a single observable for the view state, ensuring easier maintenance, reliability, and readability of code. The method is showcased with examples from a simple map app, outlining states like Loading, PermissionDenied, and WithLocation, and demonstrating how to handle these within the ViewModel. Benefits include flexibility, the ability to move logic into sealed interfaces/classes, and better testability.

Modeling Android Screen State