Android Studio

IDE for Android app development based on IntelliJ IDEA.

When to Use

• Android app development
• Kotlin/Java mobile projects
• Jetpack Compose development
• APK building and debugging

Quick Start

// MainActivity.kt
class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            MyApp()
        }
    }
}

Core Concepts

Gradle Configuration

// build.gradle.kts (app)
plugins {
    id("com.android.application")
    id("org.jetbrains.kotlin.android")
}

android {
    namespace = "com.example.myapp"
    compileSdk = 34

    defaultConfig {
        applicationId = "com.example.myapp"
        minSdk = 24
        targetSdk = 34
        versionCode = 1
        versionName = "1.0"
    }

    buildTypes {
        release {
            isMinifyEnabled = true
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }

    buildFeatures {
        compose = true
    }
}

dependencies {
    implementation(platform("androidx.compose:compose-bom:2024.01.00"))
    implementation("androidx.compose.material3:material3")
}

Debugging

// Logcat filtering
// Tag: MyActivity Level: Debug

Log.d("MyActivity", "Debug message")
Log.e("MyActivity", "Error message", exception)

// Breakpoint conditions
// Right-click breakpoint -> Condition: userId == "123"

Common Patterns

Device Management

# ADB commands
adb devices
adb install app-debug.apk
adb logcat | grep MyApp
adb shell am start -n com.example.myapp/.MainActivity

# Emulator
emulator -list-avds
emulator -avd Pixel_6_API_34

Build Variants

android {
    flavorDimensions += "version"
    productFlavors {
        create("free") {
            dimension = "version"
            applicationIdSuffix = ".free"
        }
        create("paid") {
            dimension = "version"
            applicationIdSuffix = ".paid"
        }
    }
}

Best Practices

Do:

• Use version catalogs for dependencies
• Enable R8 for release builds
• Configure ProGuard rules
• Test on multiple API levels

Don’t:

• Commit local.properties
• Ignore lint warnings
• Skip signed release builds
• Use deprecated APIs

Troubleshooting

References

• Android Developers
• Android Studio Guide