Design Architecture
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MVVM Pattern:
- ViewModel: Design your ViewModel to hold and manage UI-related data in a lifecycle-conscious way. It should be responsible for making calls to the Repository layer and handling any business logic.
- Repository Layer: This layer will interact with your web service API. It acts as a mediator between the ViewModel and the data source (your backend).
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LiveData or StateFlow:
- Decide whether to use LiveData or Kotlin's StateFlow to handle data observability and UI state management. StateFlow is a newer API that is fully integrated with Kotlin's coroutines.
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Dependency Injection:
- Consider using a dependency injection framework like Hilt or Koin for better scalability and testability.
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Navigation:
- Plan how navigation will be handled in your app. With Jetpack Compose, you can use the
NavController
for managing composable screens.
- Plan how navigation will be handled in your app. With Jetpack Compose, you can use the
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Data Models:
- Define data models corresponding to your web service's data structure for users, transactions, fund sources, etc.
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Handling State:
- Determine how to handle and store the UI state effectively, especially for complex UIs or data-driven screens.
User Authentication
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Login UI:
- Design a composable function for the login screen, ensuring it aligns with your app’s aesthetic.
- Include input fields for username/email and password, and a button to submit the login request.
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Integration with Backend:
- Use Retrofit or another HTTP client to make requests to your web service for authentication.
- Handle the reception of JWT tokens and securely store them, possibly using encrypted shared preferences.
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Secure Storage:
- Store the received JWT tokens securely. You can use Android’s EncryptedSharedPreferences or a secure library like Hawk.
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Error Handling:
- Implement error handling for scenarios like invalid credentials or network issues.
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Navigation upon Login:
- Upon successful login, navigate the user to the main screen of the app using the
NavController
.
- Upon successful login, navigate the user to the main screen of the app using the
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Signup and Password Recovery:
- Optionally, if your API supports it, include signup and password recovery options.
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ViewModel for Authentication:
- Implement a ViewModel for handling authentication logic and maintaining authentication state.