name: Android Legacy State description: Standards for State integration with Views using Coroutines and Lifecycle metadata: labels: [android, state, views, lifecycle] triggers: files: ['/*Fragment.kt', '/*Activity.kt'] keywords: ['repeatOnLifecycle', 'launchWhenStarted']

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