android-development

Q: How do I install android-development?

Run npx skills add https://github.com/travisjneuman/.claude --skill android-development in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/android-development/ (personal) or .claude/skills/android-development/ (project).

by travisjneumanMobile

Android development with Kotlin, Jetpack Compose, and modern Android architecture. Use when building Android apps, implementing Material Design, or following Android best practices.

Installs: 169
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/travisjneuman/.claude --skill android-development

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads android-development automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Android Development

Comprehensive guide for building modern Android applications.

Platforms Covered

Platform	Min SDK	Target SDK
Android Phone	API 24 (7.0)	API 34 (14)
Android Tablet	API 24	API 34
Android TV	API 24	API 34
Wear OS	API 30	API 34
Android Auto	API 29	API 34

Jetpack Compose (Modern UI)

Basic Structure

@Composable
fun MyApp() {
    MaterialTheme {
        Surface(
            modifier = Modifier.fillMaxSize(),
            color = MaterialTheme.colorScheme.background
        ) {
            MainScreen()
        }
    }
}

@Composable
fun MainScreen() {
    var count by remember { mutableStateOf(0) }

    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(16.dp),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center
    ) {
        Text(
            text = "Count: $count",
            style = MaterialTheme.typography.headlineLarge
        )

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

        Button(onClick = { count++ }) {
            Text("Increment")
        }
    }
}

State Management

// Local state
var text by remember { mutableStateOf("") }

// State hoisting
@Composable
fun StatefulCounter() {
    var count by remember { mutableStateOf(0) }
    StatelessCounter(count = count, onIncrement = { count++ })
}

@Composable
fun StatelessCounter(count: Int, onIncrement: () -> Unit) {
    Button(onClick = onIncrement) {
        Text("Count: $count")
    }
}

// ViewModel state
@HiltViewModel
class MainViewModel @Inject constructor(
    private val repository: ItemRepository
) : ViewModel() {

    private val _uiState = MutableStateFlow(UiState())
    val uiState: StateFlow<UiState> = _uiState.asStateFlow()

    fun loadItems() {
        viewModelScope.launch {
            _uiState.update { it.copy(isLoading = true) }
            try {
                val items = repository.getItems()
                _uiState.update { it.copy(items = items, isLoading = false) }
            } catch (e: Exception) {
                _uiState.update { it.copy(error = e.message, isLoading = false) }
            }
        }
    }
}

// Collecting in Compose
@Composable
fun MainScreen(viewModel: MainViewModel = hiltViewModel()) {
    val uiState by viewModel.uiState.collectAsStateWithLifecycle()

    when {
        uiState.isLoading -> LoadingIndicator()
        uiState.error != null -> ErrorMessage(uiState.error!!)
        else -> ItemList(uiState.items)
    }
}

Navigation

// Navigation setup
@Composable
fun AppNavigation() {
    val navController = rememberNavController()

    NavHost(navController = navController, startDestination = "home") {
        composable("home") {
            HomeScreen(
                onNavigateToDetail = { id ->
                    navController.navigate("detail/$id")
                }
            )
        }
        composable(
            route = "detail/{itemId}",
            arguments = listOf(navArgument("itemId") { type = NavType.StringType })
        ) { backStackEntry ->
            val itemId = backStackEntry.arguments?.getString("itemId")
            DetailScreen(itemId = itemId)
        }
    }
}

// Type-safe navigation (recommended)
@Serializable
data class DetailRoute(val itemId: String)

navController.navigate(DetailRoute(itemId = "123"))

Lists

@Composable
fun ItemList(items: List<Item>) {
    LazyColumn(
        modifier = Modifier.fillMaxSize(),
        contentPadding = PaddingValues(16.dp),
        verticalArrangement = Arrangement.spacedBy(8.dp)
    ) {
        items(
            items = items,
            key = { it.id }
        ) { item ->
            ItemCard(item = item)
        }
    }
}

// Pull to refresh
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun RefreshableList(
    items: List<Item>,
    isRefreshing: Boolean,
    onRefresh: () -> Unit
) {
    val pullRefreshState = rememberPullToRefreshState()

    PullToRefreshBox(
        isRefreshing = isRefreshing,
        onRefresh = onRefresh,
        state = pullRefreshState
    ) {
        LazyColumn { /* content */ }
    }
}

Modern Android Architecture

Clean Architecture Layers

app/
├── data/
│   ├── local/
│   │   ├── AppDatabase.kt
│   │   └── ItemDao.kt
│   ├── remote/
│   │   ├── ApiService.kt
│   │   └── ItemDto.kt
│   └── repository/
│       └── ItemRepositoryImpl.kt
├── domain/
│   ├── model/
│   │   └── Item.kt
│   ├── repository/
│   │   └── ItemRepository.kt
│   └── usecase/
│       └── GetItemsUseCase.kt
├── presentation/
│   ├── home/
│   │   ├── HomeScreen.kt
│   │   └── HomeViewModel.kt
│   └── navigation/
│       └── AppNavigation.kt
└── di/
    └── AppModule.kt

Dependency Injection (Hilt)

@HiltAndroidApp
class MyApplication : Application()

@Module
@InstallIn(SingletonComponent::class)
object AppModule {

    @Provides
    @Singleton
    fun provideDatabase(@ApplicationContext context: Context): AppDatabase {
        return Room.databaseBuilder(
            context,
            AppDatabase::class.java,
            "app_database"
        ).build()
    }

    @Provides
    @Singleton
    fun provideApiService(): ApiService {
        return Retrofit.Builder()
            .baseUrl("https://api.example.com/")
            .addConverterFactory(GsonConverterFactory.create())
            .build()
            .create(ApiService::class.java)
    }

    @Provides
    @Singleton
    fun provideItemRepository(
        apiService: ApiService,
        database: AppDatabase
    ): ItemRepository {
        return ItemRepositoryImpl(apiService, database.itemDao())
    }
}

Data Layer

Room Database

@Entity(tableName = "items")
data class ItemEntity(
    @PrimaryKey val id: String,
    val name: String,
    val createdAt: Long
)

@Dao
interface ItemDao {
    @Query("SELECT * FROM items ORDER BY createdAt DESC")
    fun getItems(): Flow<List<ItemEntity>>

    @Insert(onConflict = OnConflictStrategy.REPLACE)
    suspend fun insertItems(items: List<ItemEntity>)

    @Delete
    suspend fun deleteItem(item: ItemEntity)
}

@Database(entities = [ItemEntity::class], version = 1)
abstract class AppDatabase : RoomDatabase() {
    abstract fun itemDao(): ItemDao
}

Retrofit API

interface ApiService {
    @GET("items")
    suspend fun getItems(): List<ItemDto>

    @POST("items")
    suspend fun createItem(@Body item: CreateItemRequest): ItemDto

    @DELETE("items/{id}")
    suspend fun deleteItem(@Path("id") id: String)
}

data class ItemDto(
    val id: String,
    val name: String,
    @SerializedName("created_at") val createdAt: String
)

Repository Pattern

interface ItemRepository {
    fun getItems(): Flow<List<Item>>
    suspend fun refreshItems()
    suspend fun deleteItem(id: String)
}

class ItemRepositoryImpl @Inject constructor(
    private val apiService: ApiService,
    private val itemDao: ItemDao
) : ItemRepository {

    override fun getItems(): Flow<List<Item>> {
        return itemDao.getItems().map { entities ->
            entities.map { it.toDomain() }
        }
    }

    override suspend fun refreshItems() {
        val items = apiService.getItems()
        itemDao.insertItems(items.map { it.toEntity() })
    }
}

Material Design 3

Theme Setup

@Composable
fun MyAppTheme(
    darkTheme: Boolean = isSystemInDarkTheme(),
    dynamicColor: Boolean = true,
    content: @Composable () -> Unit
) {
    val colorScheme = when {
        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
            val context = LocalContext.current
            if (darkTheme) dynamicDarkColorScheme(context)
            else dynamicLightColorScheme(context)
        }
        darkTheme -> DarkColorScheme
        else -> LightColorScheme
    }

    MaterialTheme(
        colorScheme = colorScheme,
        typography = Typography,
        content = content
    )
}

Common Components

// Top App Bar
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun MyTopBar(
    title: String,
    onBackClick: () -> Unit
) {
    TopAppBar(
        title = { Text(title) },
        navigationIcon = {
            IconButton(onClick = onBackClick) {
                Icon(Icons.Default.ArrowBack, contentDescription = "Back")
            }
        },
        actions = {
            IconButton(onClick = { /* menu */ }) {
                Icon(Icons.Default.MoreVert, contentDescription = "Menu")
            }
        }
    )
}

// Bottom Navigation
@Composable
fun MyBottomBar(
    selectedTab: Int,
    onTabSelected: (Int) -> Unit
) {
    NavigationBar {
        NavigationBarItem(
            icon = { Icon(Icons.Default.Home, contentDescription = null) },
            label = { Text("Home") },
            selected = selectedTab == 0,
            onClick = { onTabSelected(0) }
        )
        NavigationBarItem(
            icon = { Icon(Icons.Default.Settings, contentDescription = null) },
            label = { Text("Settings") },
            selected = selectedTab == 1,
            onClick = { onTabSelected(1) }
        )
    }
}

Platform-Specific

Android TV

// Focus management
@Composable
fun TvButton(
    onClick: () -> Unit,
    content: @Composable () -> Unit
) {
    var isFocused by remember { mutableStateOf(false) }

    Box(
        modifier = Modifier
            .onFocusChanged { isFocused = it.isFocused }
            .focusable()
            .clickable(onClick = onClick)
            .background(
                if (isFocused) MaterialTheme.colorScheme.primary
                else MaterialTheme.colorScheme.surface
            )
    ) {
        content()
    }
}

Wear OS

@Composable
fun WearApp() {
    MaterialTheme {
        ScalingLazyColumn(
            modifier = Modifier.fillMaxSize(),
            anchorType = ScalingLazyListAnchorType.ItemCenter
        ) {
            item { TimeText() }
            item {
                Chip(
                    onClick = { },
                    label = { Text("Action") }
                )
            }
        }
    }
}

Testing

Unit Tests

@Test
fun `getItems returns mapped domain objects`() = runTest {
    val repository = ItemRepositoryImpl(
        apiService = FakeApiService(),
        itemDao = FakeItemDao()
    )

    val items = repository.getItems().first()

    assertEquals(2, items.size)
    assertEquals("Item 1", items[0].name)
}

Compose UI Tests

@HiltAndroidTest
class MainScreenTest {
    @get:Rule
    val composeTestRule = createAndroidComposeRule<MainActivity>()

    @Test
    fun displayItems_whenLoaded() {
        composeTestRule.onNodeWithText("Item 1").assertIsDisplayed()
        composeTestRule.onNodeWithText("Item 2").assertIsDisplayed()
    }

    @Test
    fun navigateToDetail_onItemClick() {
        composeTestRule.onNodeWithText("Item 1").performClick()
        composeTestRule.onNodeWithText("Item Details").assertIsDisplayed()
    }
}

Play Store Requirements

Required

Privacy policy
App icon (512x512)
Feature graphic (1024x500)
Screenshots (min 2)
Target API 34+

App Bundle

android {
    bundle {
        language {
            enableSplit = true
        }
        density {
            enableSplit = true
        }
        abi {
            enableSplit = true
        }
    }
}

Best Practices

DO:

Use Kotlin Coroutines and Flow
Follow unidirectional data flow
Use Jetpack Compose for new UI
Implement proper lifecycle handling
Support multiple screen sizes

DON'T:

Block main thread
Leak contexts
Hardcode dimensions
Ignore process death
Skip ProGuard rules

Kotlin Multiplatform (KMP) / Compose Multiplatform (CMP)

Shared Business Logic with KMP

// shared/src/commonMain/kotlin/UserRepository.kt
expect class PlatformContext

class UserRepository(private val api: ApiService, private val db: Database) {
    suspend fun getUsers(): List<User> {
        return try {
            val remote = api.fetchUsers()
            db.saveUsers(remote)
            remote
        } catch (e: Exception) {
            db.getCachedUsers()
        }
    }
}

// shared/src/androidMain/kotlin/PlatformContext.kt
actual class PlatformContext(val context: Context)

// shared/src/iosMain/kotlin/PlatformContext.kt
actual class PlatformContext

Compose Multiplatform (Shared UI)

// shared/src/commonMain/kotlin/App.kt
@Composable
fun App() {
    MaterialTheme {
        var users by remember { mutableStateOf<List<User>>(emptyList()) }
        val repository = remember { UserRepository() }

        LaunchedEffect(Unit) {
            users = repository.getUsers()
        }

        LazyColumn {
            items(users) { user ->
                UserCard(user)
            }
        }
    }
}

// Runs natively on Android, iOS, Desktop, and Web

KMP Project Structure

project/
├── shared/
│   └── src/
│       ├── commonMain/     # Shared Kotlin code
│       ├── androidMain/    # Android-specific
│       ├── iosMain/        # iOS-specific
│       └── desktopMain/    # Desktop-specific
├── androidApp/             # Android entry point
├── iosApp/                 # iOS entry point (Swift/SwiftUI)
└── desktopApp/             # Desktop entry point

Navigation 3 (Type-Safe Navigation)

// Define routes as serializable data classes
@Serializable
data object Home

@Serializable
data class Detail(val itemId: String)

@Serializable
data class Settings(val section: String? = null)

// Navigation setup
@Composable
fun AppNavHost(navController: NavHostController = rememberNavController()) {
    NavHost(navController = navController, startDestination = Home) {
        composable<Home> {
            HomeScreen(onItemClick = { id ->
                navController.navigate(Detail(itemId = id))
            })
        }
        composable<Detail> { backStackEntry ->
            val detail: Detail = backStackEntry.toRoute()
            DetailScreen(itemId = detail.itemId)
        }
        composable<Settings> { backStackEntry ->
            val settings: Settings = backStackEntry.toRoute()
            SettingsScreen(section = settings.section)
        }
    }
}

API 35 (Android 15) Features

Feature	Description
Edge-to-edge enforced	Apps must handle insets properly
Predictive back	System back gesture with preview animations
Private Space	User-controlled hidden app profile
Satellite connectivity	SMS/MMS over satellite
App archival	Auto-archive unused apps, preserve data
Health Connect	Updated health data APIs

// Edge-to-edge (required on API 35+)
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    enableEdgeToEdge()

    setContent {
        Scaffold(
            modifier = Modifier.fillMaxSize(),
            contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
        ) { innerPadding ->
            MainContent(modifier = Modifier.padding(innerPadding))
        }
    }
}

// Predictive back with Compose
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun DetailScreen(onBack: () -> Unit) {
    BackHandler(onBack = onBack)
    // Content renders with predictive back animation automatically
}

Baseline Profiles for Startup Performance

// baselineprofile/build.gradle.kts
dependencies {
    implementation("androidx.benchmark:benchmark-macro-junit4:1.3.0")
}

// BaselineProfileGenerator.kt
@RunWith(AndroidJUnit4::class)
class BaselineProfileGenerator {
    @get:Rule
    val rule = BaselineProfileRule()

    @Test
    fun generateBaselineProfile() {
        rule.collect(packageName = "com.example.app") {
            // Critical user journey
            pressHome()
            startActivityAndWait()
            device.findObject(By.text("Login")).click()
            device.wait(Until.hasObject(By.text("Dashboard")), 5000)
        }
    }
}

// app/build.gradle.kts
android {
    buildTypes {
        release {
            // Baseline profiles improve startup by 15-30%
            baselineProfile.automaticGenerationDuringBuild = true
        }
    }
}

Credential Manager API

// Modern sign-in replacing legacy APIs
val credentialManager = CredentialManager.create(context)

// Sign in with passkeys, passwords, or federated identity
suspend fun signIn() {
    val request = GetCredentialRequest(listOf(
        GetPasswordOption(),
        GetPublicKeyCredentialOption(requestJson = passkeyRequestJson),
        GetGoogleIdOption(serverClientId = WEB_CLIENT_ID),
    ))

    try {
        val result = credentialManager.getCredential(context, request)
        handleSignIn(result)
    } catch (e: GetCredentialException) {
        handleSignInError(e)
    }
}

// Create a passkey
suspend fun createPasskey() {
    val request = CreatePublicKeyCredentialRequest(
        requestJson = createPasskeyRequestJson
    )
    val result = credentialManager.createCredential(context, request)
    handlePasskeyCreation(result)
}

FAQ

What does the android-development skill do?

Android development with Kotlin, Jetpack Compose, and modern Android architecture. Use when building Android apps, implementing Material Design, or following Android best practices.

How do I install android-development?

Run npx skills add https://github.com/travisjneuman/.claude --skill android-development in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/android-development/ (personal) or .claude/skills/android-development/ (project).

Which AI agents can use android-development?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is android-development safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains android-development?

It is published by travisjneuman in travisjneuman/.claude. It has 169 recorded installs.

More from travisjneuman/.claude

View all →

document-skills

travisjneuman/.claude

Professional document creation, editing, and analysis for Office formats (docx, pdf, pptx, xlsx). Use when working with Word documents, PDFs, PowerPoint presentations, or Excel spreadsheets.

Docs & Writing3.3K installs

brand-identity

travisjneuman/.claude

Brand strategy and identity design for businesses and products. Use when creating brand guidelines, developing visual identity systems, or defining brand positioning.

Marketing & SEO1.7K installs

travel-planner

travisjneuman/.claude

Travel destination research and daily itinerary creation with logistics planning, budget tracking, and experience optimization. Use when planning trips, creating travel itineraries, comparing destinations, or organizing travel logistics.

Code Quality & Workflow502 installs

business-strategy

travisjneuman/.claude

Business strategy expertise for strategic planning, competitive analysis, market entry, M&A strategy, portfolio management, and strategic decision-making. Use when analyzing competitive positioning, planning growth strategies, or making strategic decisions.

Business & Finance498 installs

graphic-design

travisjneuman/.claude

Professional graphic design principles for digital and print media. Use when creating visual designs, choosing color palettes, typography, layouts, or providing design feedback.

Frontend & Design493 installs

real-estate-analyzer

travisjneuman/.claude

Open the skill to read its SKILL.md instructions.

400 installs

Popular mobile skills

View category →

design-mobile-apps

designed-by-ai/skills

Design mobile app screens with Sleek, edit Sleek projects, and implement their designs in React Native or HTML.

Mobile1.1M installs

ios-design

uizze.sh

Design and review iOS UI/UX for iPhone apps in SwiftUI, UIKit, or React Native. Use for mobile app design, screen redesigns, navigation flows, typography, forms, keyboard and safe-area layout, and accessibility checks. Apply Apple Human Interface Guidelines and consult real product references through the optional Uizze connection.

Mobile416.5K installs

vercel-react-native-skills

vercel-labs/agent-skills

React Native and Expo best practices for building performant mobile apps. Use when building React Native components, optimizing list performance, implementing animations, or working with native modules. Triggers on tasks involving React Native, Expo, mobile performance, or native platform APIs.

OfficialMobile256.7K installs

animate-expo

emilkowalski/skills

Build animations in React Native and Expo, making the decisions in the order that determines whether they feel right — should it animate, which thread it runs on, which properties, spring or timing, how the gesture hands off, how it degrades. Writes the implementation with Reanimated, Gesture Handler, Expo Router and expo-haptics. Use when animating anything in an Expo app, adding gestures, sheets, screen transitions, press feedback or haptics, or fixing motion that stutters on device. For web animation use animate.

Mobile140.1K installs

xcode-project-setup

firebase/agent-skills

Safely modifies Xcode projects (.pbxproj) to add Swift Packages and link files. Use this skill whenever an iOS project needs dependencies installed (e.g. Firebase, Alamofire).

OfficialMobile131.2K installs

firebase-remote-config-basics

firebase/agent-skills

Manages Firebase Remote Config templates, feature flags, loading strategies, and SDKs (Android, iOS). Use when downloading/deploying remoteconfig JSON templates, managing version history/feature flags, setting in-app defaults, fetchAndActivate(), real-time listeners, or SDK setup. Don't use for Firebase Hosting, Auth, Firestore, Data Connect, Crashlytics, or App Hosting.

OfficialMobile121.7K installs

android-development

Install

Install

Describe the task

Review the result

SKILL.md

Android Development

Platforms Covered

Jetpack Compose (Modern UI)

Basic Structure

State Management

Navigation

Lists

Modern Android Architecture

Clean Architecture Layers

Dependency Injection (Hilt)

Data Layer

Room Database

Retrofit API

Repository Pattern

Material Design 3

Theme Setup

Common Components

Platform-Specific

Android TV

Wear OS

Testing

Unit Tests

Compose UI Tests

Play Store Requirements

Required

App Bundle

Best Practices

DO:

DON'T:

Kotlin Multiplatform (KMP) / Compose Multiplatform (CMP)

Shared Business Logic with KMP

Compose Multiplatform (Shared UI)

KMP Project Structure

Navigation 3 (Type-Safe Navigation)

API 35 (Android 15) Features

Baseline Profiles for Startup Performance

Credential Manager API

FAQ

More from travisjneuman/.claude

Popular mobile skills