# Android XML Views

> 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)

- Skill: `comeonoliver/android-xml-views` (Agent Skill)
- Install (CLI): `npx skillmds@latest add comeonoliver/android-xml-views`
- Raw SKILL.md: https://api.skillmd.com/api/skills/comeonoliver/android-xml-views/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: ComeOnOliver (https://skillmd.com/u/comeonoliver)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/comeonoliver/android-xml-views

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# 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)