android

## What I do - Develop native Android applications using Kotlin and Java - Implement Android UI with Jetpack Compose and XML layouts - Work with Android APIs, SDKs, and platform services - Optimize app performance and memory usage - Handle device compatibility and fragmentation - Implement Android security best practices - Work with Android Jetpack libraries and architecture components ## When to use me Use me when: - Building native Android applications - Migrating iOS apps to Android - Optimizing existing Android apps for performance - Implementing Android-specific features (widgets, notifications, background services) - Working with Android device hardware (camera, sensors, GPS) - Preparing apps for Google Play Store deployment ## Key Concepts ### Android Architecture Android follows a component-based architecture with Activities, Fragments, Services, and Broadcast Receivers. Modern Android development uses MVVM with Jetpack components. ```kotlin // ViewModel with StateFlow class MainViewModel : ViewModel() { private val _uiState = MutableStateFlow(UiState()) val uiState: StateFlow<UiState> = _uiState fun loadData() { viewModelScope.launch { _uiState.update { it.copy(isLoading = true) } val data = repository.getData() _uiState.update { it.copy(data = data, isLoading = false) } } } } ``` ### Jetpack Compose Declarative UI framework for building Android interfaces: - Composable functions describe UI - State management with remember and StateFlow - Material Design 3 components ### Android SDK Components - Activities: Single screen entry points - Fragments: Reusable UI components - Services: Background processing - WorkManager: Deferred background tasks - Room: Local database - Hilt: Dependency injection ### Performance Considerations - RecyclerView for efficient list rendering - Kotlin coroutines for async operations - ProGuard/R8 for code shrinking - Baseline profiles for startup optimization