Generate Kotlin Android Activities

Generates well-structured, maintainable Kotlin Android Activities following modern best practices - proper lifecycle management, View Binding, MVVM architecture, coroutines, and Material Design-aligned navigation patterns.

Use this skill when scaffolding a new Android Activity, refactoring an existing Activity toward MVVM, implementing a detail screen backed by a ViewModel, or building a list screen with search, filtering, and pagination. Not a fit for Jetpack Compose-only screens without an Activity/View Binding structure, or for non-Android Kotlin code. It also covers using appropriate Activity launch modes and properly handling intent filters for deep links as part of the navigation guidance.

Provides a base Activity structure template with onCreate broken into discrete setup steps (binding, ViewModel, observers, click listeners, intent handling) for consistent, readable Activity code.

Includes a full MVVM example (ProductDetailActivity) showing: a companion object factory method for type-safe Intent creation, View Binding setup, toolbar and RecyclerView configuration, LiveData observers for product/loading/error state, image loading via Glide, error display via Snackbar with a retry action, and share-intent construction.

Includes a second full example (ProductListActivity) covering a searchable, filterable list screen: RecyclerView adapter with item-click and favorite-click callbacks, infinite-scroll pagination via a scroll listener, swipe-to-refresh, and a SearchView integrated into the options menu with query text listeners.

Best-practice guidance covers state management (handling configuration changes, ViewModel for surviving state, sealed classes for UI state), performance (View Binding over findViewById, proper RecyclerView/ViewHolder patterns, lifecycle-aware coroutines, pagination), error handling (validating intent extras, retry mechanisms), navigation (companion-object intent factories, launch modes, deep links), and testability (separating business logic into ViewModels, injectable dependencies, interface-based external dependencies).

It also emphasizes proper saved-state handling for critical UI state across configuration changes, proper back-navigation handling, wrapping fallible operations in try-catch blocks, and keeping Activities focused specifically on UI binding and user interactions while exposing testable methods as internal where needed.

Built on AppCompatActivity, View Binding, Android ViewModel/LiveData, RecyclerView, and coroutines, with the example code additionally using Glide for image loading and Material Snackbar for error UI. The list-screen example also wires the options menu SearchView directly to the ViewModel's search and clear-search methods, and the detail-screen example includes a share-intent builder using Intent.ACTION_SEND so the share flow stays consistent with the rest of the Activity's ViewModel-driven state.

Android developers who need a consistent, testable Activity structure and concrete MVVM examples (detail screen, searchable list screen) rather than a general Android architecture overview.

private fun setupViewModel() {
    viewModel = ViewModelProvider(this)[MainViewModel::class.java]
}