Developed offline first app mechanism using android architecture(Room, WorkManager, Navigation, View Binding, View Model,etc), Dagger-Hilt, Firestore Cloud DB, Coroutines, Clean Architecture using MVVM, Multi-Module Setup and foundation(Android KTX) components.
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Database
- Room DB for local caching
- Firestore for cloud DB storage
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Foreground and Background Sync Handling
- WorkManager -> Workmanager used along with coroutine (CoroutineWorker) and Dagger-Hilt (HiltWorker)
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Dependency Injection
- Dagger Hilt
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Routing
- Navigation
- Arguments passed between screens using navigation
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Communication between app layers
- Kotlin Coroutines for interacting between ViewModel, UseCases and Room DB
- Broadcast receiver for receiving updates when work manager finishes syncing a job
- WorkManager with live data in viewmodel to show updates on ui
Other
- ViewBinding
- Clean Architecture using MVVM
- Multi-Module Setup -> Network and Core module are completely independent of each other. App module depends on Network and Core module
- Kotlin Coroutines
- Android KTX
I have used two ways to handle scenario when syncing of a comment fails (can use either of below by uncommenting the commented way).
- Delete comment from local db directly if syncing fails to maintain data integrity between local and remote DB.
- Change status of isSync variable (0 -> not synced, 1 -> synced, 2 -> failed to sync) which will change color of comment text to red and also add a strike over the text.
Note :- Green Color -> Comment is synced, Grey Color -> Comment is yet to be synced, Red Color with strike -> Comment failed to sync
- App running, no sync failure, internet available
Screen.Recording.2022-05-27.at.12.29.00.AM.mov
- App running, no sync failure, at first network is disconnected and later its connected to sync
Screen.Recording.2022-05-27.at.12.35.41.AM.mov
- App not running, no sync failure, network connected later to sync jobs when app is not running/killed.
- Step 1 :- At first network will be disconnected and will add jobs to sync
- Step 2 :- Kill (not even in background/recently opened apps) app and then connect to network to sync jobs.
- Step 3 :- Disconnect network again and open app to check if jobs were synced when app was not running.
Scenario.3.mp4
- App running, firebase rules changed to simulate sync failure, internet available
Screen.Recording.2022-05-27.at.12.53.21.AM.mov
