I spent the first few minutes just thinking about composable decomposition before writing anything.
Start by outlining the component hierarchy and state model, then walk through the key composables (language selectors, swap button, input/output areas, action row) while emphasizing state hoisting and Material 3 theming. Conclude by discussing trade-offs like state management choices, performance optimizations, and how you'd handle API integration for translation.
Pro tip: Demonstrate production readiness by mentioning edge cases like empty input, loading states, and error handling, and explain how you'd structure the code for testability and reusability.
Break down the screen into composables: LanguageSelector, SwapButton, InputField, OutputField, ActionRow. Identify the state needed (source/target languages, input text, translated text, loading/error) and decide where to hoist it.
Create each composable with proper parameters and modifiers, using Material 3 components like TextField, IconButton, and Card. Ensure they are stateless and previewable.
Use remember and mutableStateOf for local UI state, and ViewModel for business logic. Handle the swap action by swapping language codes and text, and trigger translation via a coroutine when input changes or a button is pressed.
Show how to call a translation API (e.g., via Retrofit) from the ViewModel, exposing a UiState with loading, success, and error. Update the UI accordingly with progress indicators and error messages.
Talk about state management choices (ViewModel vs. remember), performance (debouncing input, avoiding recomposition), and accessibility. Mention testing strategies for composables and ViewModel.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.