Mobile Android Design Skill for Codex

Master Material Design 3 and Jetpack Compose patterns for building native Android apps. Use when designing Android interfaces, implementing Compose UI, or following Google's Material Design guidelines.

18k tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

38452

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/wshobson/agents --skill mobile-android-design

The instruction itself

6 sections, as written by the author

Android Mobile Design

Master Material Design 3 (Material You) and Jetpack Compose to build modern, adaptive Android applications that integrate seamlessly with the Android ecosystem.

When to Use This Skill

Designing Android app interfaces following Material Design 3
Building Jetpack Compose UI and layouts
Implementing Android navigation patterns (Navigation Compose)
Creating adaptive layouts for phones, tablets, and foldables
Using Material 3 theming with dynamic colors
Building accessible Android interfaces
Implementing Android-specific gestures and interactions
Designing for different screen configurations

Detailed section: Core Concepts

Originally a 9201-byte section in this SKILL.md. Moved to references/details.md to fit Codex's 8 KB skill body cap.

Quick Start Component

@Composable
fun ItemListCard(
    item: Item,
    onItemClick: () -> Unit,
    modifier: Modifier = Modifier
) {
    Card(
        onClick = onItemClick,
        modifier = modifier.fillMaxWidth(),
        shape = RoundedCornerShape(12.dp)
    ) {
        Row(
            modifier = Modifier
                .padding(16.dp)
                .fillMaxWidth(),
            verticalAlignment = Alignment.CenterVertically
        ) {
            Box(
                modifier = Modifier
                    .size(48.dp)
                    .clip(CircleShape)
                    .background(MaterialTheme.colorScheme.primaryContainer),
                contentAlignment = Alignment.Center
            ) {
                Icon(
                    imageVector = Icons.Default.Star,
                    contentDescription = null,
                    tint = MaterialTheme.colorScheme.onPrimaryContainer
                )
            }

            Spacer(modifier = Modifier.width(16.dp))

            Column(modifier = Modifier.weight(1f)) {
                Text(
                    text = item.title,
                    style = MaterialTheme.typography.titleMedium
                )
                Text(
                    text = item.subtitle,
                    style = MaterialTheme.typography.bodyMedium,
                    color = MaterialTheme.colorScheme.onSurfaceVariant
                )
            }

            Icon(
                imageVector = Icons.Default.ChevronRight,
                contentDescription = null,
                tint = MaterialTheme.colorScheme.onSurfaceVariant
            )
        }
    }
}

Best Practices

Use Material Theme: Access colors via MaterialTheme.colorScheme for automatic dark mode support
Support Dynamic Color: Enable dynamic color on Android 12+ for personalization
Adaptive Layouts: Use WindowSizeClass for responsive designs
Content Descriptions: Add contentDescription to all interactive elements
Touch Targets: Minimum 48dp touch targets for accessibility
State Hoisting: Hoist state to make components reusable and testable
Remember Properly: Use remember and rememberSaveable appropriately
Preview Annotations: Add @Preview with different configurations

Common Issues

Recomposition Issues: Avoid passing unstable lambdas; use remember
State Loss: Use rememberSaveable for configuration changes
Performance: Use LazyColumn instead of Column for long lists
Theme Leaks: Ensure MaterialTheme wraps all composables
Navigation Crashes: Handle back press and deep links properly
Memory Leaks: Cancel coroutines in DisposableEffect

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How to use it

Copy the folder

Take wshobson/mobile-android-design from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.