Agent skill

Android Legacy State

Standards for State integration with Views using Coroutines and Lifecycle

View SKILL.md on GitHub Repository
Stars 163
Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/legacy-state

Metadata

Additional technical details for this skill

labels
android state views lifecycle
triggers 
{
    "files": [
        "**/*Fragment.kt",
        "**/*Activity.kt"
    ],
    "keywords": [
        "repeatOnLifecycle",
        "launchWhenStarted"
    ]
}

SKILL.md

Android Legacy State Standards

Priority: P1

Implementation Guidelines

Flow Consumption

  • Rule: ALWAYS use repeatOnLifecycle(Lifecycle.State.STARTED) to collect flows in Views.
  • Why: Prevents crashes (collecting while view is 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

  • launchWhenX: **Deprecated**: Use repeatOnLifecycle.
  • observe(this): **Leak Risk**: Use viewLifecycleOwner in Fragments.

References

  • Flow Consumption Template

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