// the find
guolindev/coolweatherjetpack
酷欧天气的Jetpack版本实现，采用了MVVM架构。
A Kotlin Android weather app that reimplements the author's earlier 'Cool Weather' project using Jetpack components and MVVM. It's a teaching example from a well-known Chinese Android book author, not a production app — the point is the architecture pattern, not the weather features.
The layered architecture is genuinely clean: UI → ViewModel → Repository → (Room or Network) with strictly unidirectional references and no layer skipping. The repository handles the local-vs-network decision transparently, which is exactly how this pattern should work. Retrofit + coroutines wiring is straightforward and easy to follow as a reference implementation. The architecture diagram in the README is a real asset — it maps 1:1 to the code structure.
Last pushed September 2023 and the dependency versions are stale — the old HeWeather API it calls is long deprecated and you can't actually run this app without finding a replacement data source. It uses LitePal for local persistence instead of Room, which is an odd choice for a Jetpack showcase given Room is the obvious Jetpack-native answer. No dependency injection framework (Hilt/Koin) — factories and `InjectorUtil` are wired by hand, which is fine for learning but shows its age. The test directory has only the default scaffolded tests; there's no actual test coverage despite the code being simple enough to unit test.