android-development

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---
name: android-development
description: Android Kotlin development with Coroutines, Jetpack Compose, Koin, and MockK testing
---

# Android Development Skill

---

## Project Structure

```
project/
├── app/
│   ├── src/
│   │   ├── main/
│   │   │   ├── kotlin/com/example/app/
│   │   │   │   ├── data/               # Data layer
│   │   │   │   │   ├── local/          # Room database
│   │   │   │   │   ├── remote/         # Retrofit/Ktor services
│   │   │   │   │   └── repository/     # Repository implementations
│   │   │   │   ├── di/                 # Koin modules
│   │   │   │   ├── domain/             # Business logic
│   │   │   │   │   ├── model/          # Domain models
│   │   │   │   │   ├── repository/     # Repository interfaces
│   │   │   │   │   └── usecase/        # Use cases
│   │   │   │   ├── ui/                 # Presentation layer
│   │   │   │   │   ├── feature/        # Feature screens
│   │   │   │   │   │   ├── FeatureScreen.kt      # Compose UI
│   │   │   │   │   │   └── FeatureViewModel.kt
│   │   │   │   │   ├── components/     # Reusable Compose components
│   │   │   │   │   └── theme/          # Material theme
│   │   │   │   └── App.kt              # Application class
│   │   │   ├── res/
│   │   │   └── AndroidManifest.xml
│   │   ├── test/                       # Unit tests
│   │   └── androidTest/                # Instrumentation tests
│   └── build.gradle.kts
├── build.gradle.kts                    # Project-level build file
├── gradle.properties
├── gradle/
│   └── libs.versions.toml              # Version Catalog
├── settings.gradle.kts
└── CLAUDE.md
```

---

## Gradle Configuration (Kotlin DSL & Version Catalog)

### Version Catalog (gradle/libs.versions.toml)
```toml
[versions]
agp = "8.3.0"
kotlin = "1.9.22"
coreKtx = "1.12.0"
junit = "4.13.2"
junitVersion = "1.1.5"
espressoCore = "3.5.1"
lifecycleRuntimeKtx = "2.7.0"
activityCompose = "1.8.2"
composeBom = "2024.02.00"
ksp = "1.9.22-1.0.17"
room = "2.6.1"
retrofit = "2.9.0"
okhttp = "4.12.0"
koin = "3.5.3"
coil = "2.6.0"
serialization = "1.6.3"
workManager = "2.9.0"
navigation = "2.7.7" # Navigation 3 reference likely refers to new Compose Navigation patterns or alpha versions, using stable 2.7.7 for now or keeping user intent if specific library exists. Assuming standard navigation-compose here mapped to user's 'navigation3' alias for structure consistency.
preference = "1.2.1"
media3 = "1.3.0"
jsoup = "1.17.2"
zxing = "3.5.3"
json = "20231013"
coroutinesTest = "1.7.3"
mockk = "1.13.8"

[libraries]
androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
androidx-compose-ui = { group = "androidx.compose.ui", name = "ui" }
androidx-compose-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
androidx-compose-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
androidx-compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
androidx-compose-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
androidx-compose-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
androidx-compose-material3 = { group = "androidx.compose.material3", name = "material3" }
androidx-compose-material-icons-extended = { group = "androidx.compose.material", name = "material-icons-extended" }

androidx-room-runtime = { group = "androidx.room", name = "room-runtime", version.ref = "room" }
androidx-room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room" }
androidx-room-compiler = { group = "androidx.room", name = "room-compiler", vers