android-studio

# Android Studio Android Studio is the official integrated development environment (IDE) for Android application development, built on IntelliJ IDEA with rich profiling and emulator tools. ## When to Use - **Native Android & Jetpack Compose Development**: Official Google IDE with visual layout editor, Compose preview, and Profiler. - **Gradle Build Script Optimization**: Configuring multi-module build logic with Kotlin DSL (`build.gradle.kts`). - **Android Emulator & Device Management**: Running virtual and physical devices via ADB and headless emulator CLI. - **App Performance & Memory Profiling**: Diagnosing frame drops, memory leaks, and CPU spikes using Android Studio Profiler. ## Quick Start ```bash # Launch Android Studio or build project from command line ./gradlew assembleDebug # Install and run on connected device/emulator ./gradlew installDebug adb shell am start -n "com.example.app/.MainActivity" ``` ## Core Concepts ### Jetpack Compose Preview & UI Inspection Authoring declarative UI with multi-device previews: ```kotlin import androidx.compose.foundation.layout.* import androidx.compose.material3.* import androidx.compose.runtime.* import androidx.compose.ui.Modifier import androidx.compose.ui.tooling.preview.Preview import androidx.compose.ui.unit.dp @Composable fun MetricCard(title: String, value: String, modifier: Modifier = Modifier) { Card( modifier = modifier.padding(8.dp), colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceVariant) ) { Column(modifier = Modifier.padding(16.dp)) { Text(text = title, style = MaterialTheme.typography.labelMedium) Spacer(modifier = Modifier.height(4.dp)) Text(text = value, style = MaterialTheme.typography.headlineMedium) } } } // Interactive Preview for Android Studio Design Canvas @Preview(name = "Light Mode", showBackground = true) @Preview(name = "Dark Mode", uiMode = android.content.res.Configuration.UI_MODE_NIGHT_YES) @Composable fun MetricCardPreview() { MaterialTheme { MetricCard(title = "Network Throughput", value = "1.2 GB/s") } } ``` ### Modern Gradle Build Configuration (build.gradle.kts) Multi-module build setup with version catalogs: ```kotlin // app/build.gradle.kts plugins { alias(libs.plugins.android.application) alias(libs.plugins.kotlin.android) alias(libs.plugins.compose.compiler) } android { namespace = "com.company.enterpriseapp" compileSdk = 35 defaultConfig { applicationId = "com.company.enterpriseapp" minSdk = 26 targetSdk = 35 versionCode = 1 versionName = "2026.1.0" } buildTypes { release { isMinifyEnabled = true isShrinkResources = true proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro") } } } ``` ### Headless Emulator & ADB Operations Managing testing devices from command line: ```bash # List available Android Virtual Devices (AVDs) emulator -list-avds # Launch AVD headlessly in CI runner emulator -avd Pixel_8_API_35 -no-window -no-audio -no-boot-anim & # Wait for device to complete boot adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed) ]]; do sleep 1; done;' ``` ## Common Patterns ### Gradle Build Cache and Memory Optimization **Problem**: Slow Gradle build and sync times inside Android Studio. **Solution**: Configure build properties in `gradle.properties`: ```properties org.gradle.jvmargs=-Xmx4096m -XX:+UseParallelGC org.gradle.parallel=true org.gradle.caching=true org.gradle.configuration-cache=true android.useAndroidX=true ``` ## Best Practices **Do**: - Migrate build scripts to Kotlin DSL (`build.gradle.kts`) and Gradle Version Catalogs (`libs.versions.toml`). - Enable R8 code shrinking and resource minification (`isMinifyEnabled = true`) on release builds. - Utilize Android Studio Profiler (CPU, Memory, Energy) before pushing production releases. - Allocate sufficient heap memory to the Gradle daemon in `gradle.properties` (`org.gradle.jvmargs=-Xmx4096m`). **Don't**: - Leave debug signing credentials in open repositories; inject keystores via environment variables. - Run heavy unit tests on the Android Emulator if pure JVM unit tests (`src/test`) suffice. - Ignore Lint warnings; configure `lint { abortOnError = true }` in CI. ## Troubleshooting | Error | Cause | Solution | | :--------------------------------------------- | :-------------------------------------------------------------------- | :----------------------------------------------------------------------- | | `Gradle sync failed: Connection timed out` | Proxy, firewall, or Gradle wrapper downloading over slow network. | Check offline work in Gradle settings or use pre-downloaded wrapper. | | `Installed Build Tools revision is corrupted` | Incomplete download of Android SDK Build Tools. | Open SDK Manager, uninstall affected Build-Tools version, and reinstall. | | `Emulator: Process crashed with exit code 139` | Hardware acceleration (HAXM/Hypervisor) conflict or GPU driver issue. | Change Emulator settings > Emulated Performance: Graphics to 'Software'. | ## References - [Android Studio User Guide](https://developer.android.com/studio/intro)