QuizApp Server is an Android backend service designed to provide quiz data to multiple client applications using AIDL (Android Interface Definition Language). It acts as a centralized "Server" app to the QuizApp Client app, that fetches quiz content from a remote API and manages client sessions and progress.
- Inter-Process Communication (IPC): Uses AIDL to allow external applications to securely fetch quiz data and receive callbacks.
- Multi-Client Support: Independently tracks quiz progress for multiple client applications simultaneously using
ConcurrentHashMapand Binder UID tracking. - Asynchronous Data Handling: Leverages Kotlin Coroutines and Flow for non-blocking network operations and data streaming.
- Reactive Architecture: Fetches real-time quiz data via Retrofit and provides updates to clients through remote callbacks.
- Dependency Injection: Fully powered by Dagger Hilt for clean, testable, and modular code.
- Language: Kotlin
- UI Framework: Jetpack Compose (for server main page)
- Networking: Retrofit & Gson
- DI Framework: Dagger Hilt
- Background Tasks: Android Bound Services & Coroutines
- IPC: AIDL (Android Interface Definition Language)
aidl/: Contains the AIDL definitions for IPCdata/:QuizBindService.kt: The core Bound Service handling client connections and AIDL implementations.QuizRepository.kt: Manages data fetching and state logic.QuizApiService.kt: Retrofit definitions for fetching quiz content.
di/: Hilt modules for providing networking and repository dependencies.presentation/: Simple Jetpack Compose UI to monitor service status.
Allows clients to:
- Register for callbacks.
- Start the quiz.
- Retrieve the next available question.
A oneway interface allowing the Server to push updates to clients, such as:
onQuizLoaded(): When data is ready.onError(): When a network or processing error occurs.onQuizComplete(): When the quiz is complete.onRestart(): When the quiz needs to be restarted.
To try out this application, you can install the QuizApp Client on the same device.