Standards for ViewBinding, RecyclerView, and XML Layouts. Use when implementing XML layouts, ViewBinding, or RecyclerView adapters in Android. (triggers: layout/*.xml, **/*Binding.java, **/*Binding.kt, ViewBinding, ConstraintLayout, RecyclerView)
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---
name: android-xml-views
description: "Standards for ViewBinding, RecyclerView, and XML Layouts. Use when implementing XML layouts, ViewBinding, or RecyclerView adapters in Android. (triggers: layout/*.xml, **/*Binding.java, **/*Binding.kt, ViewBinding, ConstraintLayout, RecyclerView)"
---
# Android XML Views Standards
## **Priority: P1**
## Implementation Guidelines
### ViewBinding
- **Standard**: Use ViewBinding for all XML layouts.
- **Synthetics**: `kotlin-android-extensions` is Dead. Remove it.
- **KAPT**: Avoid DataBinding unless strictly necessary (impacts build speed).
### RecyclerView
- **Adapter**: Always inherit `ListAdapter` (wraps AsyncListDiffer).
- **Updates**: Provide a proper `DiffUtil.ItemCallback`. NEVER call `notifyDataSetChanged()`.
### Layouts
- **ConstraintLayout**: Use for complex flat hierarchies.
- **Performance**: Avoid deep nesting (LinearLayout inside LinearLayout).
## Anti-Patterns
- **No findViewById**: Deprecated. Use ViewBinding for all XML layouts.
- **No kotlin-android-extensions**: Deprecated. Remove all `import kotlinx.android.synthetic.*`.
## References
- [ViewBinding & Adapter](references/implementation.md)
