Android Studio

MyApp/
├── app/
│   ├── src/main/
│   │   ├── java/           # Kotlin/Java code
│   │   ├── res/            # Resources (layouts, strings)
│   │   └── AndroidManifest.xml
│   └── build.gradle.kts    # App-level build config
├── gradle/
└── build.gradle.kts        # Project-level config

Gemini in Android Studio

AI-powered coding assistant:

• Generate code from descriptions
• Fix errors and bugs
• Answer Android development questions
• Explain existing code

Jetpack Compose

Modern declarative UI toolkit:

@Composable
fun Greeting(name: String) {
    Text(text = "Hello $name!")
}

@Preview
@Composable
fun PreviewGreeting() {
    Greeting("Android")
}

Gradle Build System

Build Variants

android {
    buildTypes {
        release {
            isMinifyEnabled = true
            proguardFiles(getDefaultProguardFile("proguard-android.txt"))
        }
        debug {
            isDebuggable = true
        }
    }
    flavorDimensions += "version"
    productFlavors {
        create("free") { dimension = "version" }
        create("paid") { dimension = "version" }
    }
}

Common Commands

./gradlew assembleDebug    # Build debug APK
./gradlew assembleRelease  # Build release APK
./gradlew bundleRelease    # Build App Bundle
./gradlew test             # Run unit tests

Android Emulator

Test on virtual devices:

• Phones, tablets, foldables
• Wear OS, TV, Auto
• Multiple API levels
• Location simulation
• Network conditions

APK Analyzer

Inspect APK contents:

• View DEX files
• Check resources
• Compare APK sizes
• Analyze ProGuard mappings