Manage Android UI state with ViewModel, StateFlow, and SharedFlow.
npx skills add https://github.com/hanamizuki/solopreneur --skill viewmodel-hanamizuki
Please help me install this Agent Skill. Skill: viewmodel Source: https://github.com/hanamizuki/solopreneur/tree/main/plugins/android-dev/skills/viewmodel Command: npx skills add https://github.com/hanamizuki/solopreneur --skill viewmodel-hanamizuki
Efficiently manage UI state and one-off events in Android apps using a clean ViewModel pattern with StateFlow and SharedFlow, improving testability and resilience across configuration changes.
Create a ViewModel with a private MutableStateFlow, expose a public StateFlow, and emit UI events through a SharedFlow to drive UI updates.
High-intent search queries and answers about installing and using this skill.
Use a private MutableStateFlow backing a public StateFlow inside a ViewModel to persist UI state robustly across configuration changes. This pattern keeps state lifecycle-aware and testable when collected in activities or fragments.
Deliver one-off events by emitting them through a SharedFlow configured with replay = 0 inside your ViewModel. This prevents duplicate transient events from being re-emitted to the UI during device rotation or configuration changes.
The best way to collect StateFlow and SharedFlow in Compose is using lifecycle-aware collection APIs within viewModelScope. This ensures state and events are only collected when the Compose UI is active, preventing unnecessary updates.
You need a private backing MutableStateFlow to encapsulate state mutation logic within the ViewModel. Exposing only a public StateFlow prevents external classes from modifying the UI state directly, maintaining a clean unidirectional data flow.
This StateFlow and SharedFlow pattern works with both Compose and traditional Views. It utilizes lifecycle-aware APIs to ensure proper state collection across different Android UI toolkits within activities and fragments.
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