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Integrate ViewModel state with XML Views using Coroutines and Lifecycle on Android. Use when managing state with repeatOnLifecycle or lifecycle-aware coroutines in Fragment/Activity; defer Compose state and generic Flow design to their specific skills.

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agent-skills-standard
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Claude Code

$ npx -y skills add hoangnguyen0403/agent-skills-standard --skill android-legacy-state --agent claude-code

SKILL.md

android-legacy-state.SKILL.md
name: android-legacy-state
description: Integrate ViewModel state with XML Views using Coroutines and Lifecycle on Android. Use when managing state with repeatOnLifecycle or lifecycle-aware coroutines in Fragment/Activity; defer Compose state and generic Flow design to their specific skills.
metadata:
  triggers:
    files:
    - '**/*Fragment.kt'
    - '**/*Activity.kt'
    keywords:
    - repeatOnLifecycle
    - launchWhenStarted

Android Legacy State Standards

**Priority: P1 (HIGH)**

Implementation Guidelines

Flow Consumption

  • **Rule**: ALWAYS use `repeatOnLifecycle(Lifecycle.State.STARTED)` to collect flows in Views.
  • **Why**: Prevents crashes (collecting while view destroyed) and saves resources (stops collecting in background).

LiveData vs Flow

  • **New Code**: Use `StateFlow` exclusively.
  • **Legacy**: If using LiveData, observe with `viewLifecycleOwner` (Fragment), NOT `this`.

Anti-Patterns

  • **No launchWhenStarted/Resumed**: Deprecated. Use repeatOnLifecycle instead.
  • **No observe(this) in Fragments**: Use viewLifecycleOwner to prevent lifecycle leaks.

References

  • [Flow Consumption Template](references/implementation.md)
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Repo: hoangnguyen0403/agent-skills-standard

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Questions about android-legacy-state.

Which coding agents can use android-legacy-state?
android-legacy-state installs in Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf with the skills CLI, using each agent's flag shown on this page. Flowy's auto-invocation, which fires a skill when your prompt matches, runs in Claude Code only.