🌻 This app follow Google's official architecture guidance and made with Marvle open API. Let's take a look at the sample app specifically. Additionally, the DataLayer of this app is implemented with multiple source which means for 'paging source', 'room database', 'work manager'
This app architecture consist of UI Layer, Domain Layer, Data Layer. and let's explain the responsibility of each layers in order
UI layer consist of 'UI Element', 'Data Holder Class' (can be think as AAC ViewModel)
👉 UI element is pure UI logic, correspond to 'View-System UI' or 'Compose UI' logic including 'Button', 'TextField', 'BottomNavigation' etc...
To put it in context with the architecture above, 'MainActivity', 'HomeScreen', 'BookmarkScreen' correspond to this.
👉 Data Holder Class is defined in the AAC ViewModel (meaning for 'Jetpack library') and is a class that represents the state of the UI.
To put it in context with architecture above, 'HomeViewModel', 'BookmarkViewModel' correspond to this. and also define 'CharacterUiModel' wrapping 'UiResult' which has three state of 'Loading', 'Success', 'Error'
Domain Layer has two responsibility.
👉 Responsibility for defining the duplicate logic in AAC ViewModel.
👉 Responsibility for defining the complex business logic in AAC ViewModel.
To put it in context with architecture above, The domain layer of this sample app implements the responsibility of defining the duplicate logic. that is 'ModifyCharacterSavedStatusUseCase'
Data Layer has 'Repository Module' which is first entry point of 'UI Layer' and 'Domain Layer'. 'Repository Moddule' has three responsibilities
👉 Responsibility for querying local data from database or file system or AndroidKeyStore
👉 Responsibility for requesting remote data from network
👉 Responsible for coordinating data from remote or local data sources
To put it in context with architecture above, The repository module within Data Layer is 'CharacterRepository'
My sample app is not perfect and has many shortcomings. Therefore, I would be very happy if you could request a PR for the development of the app. Always welcome.
Designed and developed by 2024 squart300kg (sangyoon song)
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