The original article first appeared in the public micro-channel number "byte floating"
Android architecture used mainly MVC, MVP, MVVM and Clean. Above architecture design pattern is no absolute good or bad, the key depends on the specific application scenarios. More about MVC, MVP and MVVM presentation can refer to MVC, MVP & MVVM
What is the Clean architecture?
Clean architecture by Uncle Bob, published in 2012, the architecture is designed for Web App.
Uncle Bob summed up in common, and the ultimate goal of a variety of system architectures, and propose only uphold the principle of hierarchical and dependent rule, proposed Clean architectural thought.
Analysis of Clean Architecture
One-way dependence
Clean architecture dependencies between the layers is unidirectional, only the outer layer is dependent on the inner layer.
MVP VS Clean
Android can be seen from the figure achieved Clean architecture is actually more popular MVP architecture transformation.
The MVP as Clean View and Presenter layer architecture Presentations Layer, new Domain Layer all the business logic processing. Model layer in MVP function is weakened, as the only interface to the external Data Layer, there are no business logic. Generally independent data model each floor.
Clean the Presentation layer
It includes the following categories:
- Presenter View layer and related classes, of course, you can transform the MVVP framework foundation.
- Mapper classes, the data model layer is responsible for Domain convert Presentation data model.
- Exception class encapsulating layer is present.
Clean the Domain layer
Domain layer does not rely on third-party libraries and libraries Android, unit testing can be done independently.
It includes the following categories:
- Use Cases (Interactor) category, is responsible for the completion of an operation against Data layer. (Such as access to movie list, acquiring a movie can be regarded as the detail info Use Case 2 or Interactor).
- Mapper classes, is responsible for converting the data model to the data model layer Data Domain layer.
- Exception class encapsulating layer is present.
Clean the Data Layer
Pictures from Robert C. Martin (Uncle Bob)
This figure is enough to explain everything.
It includes various API interfaces, corresponding to the main database operations, data manipulation, and network file operations, some unusual class packages.
Mapper classes responsible for converting network data model is a data model Data layer.
Note that only the interface layer provides Data, no business logic.
Android Clean architecture implementation
A Clean architecture and Retrofit, RxKotlin, Dagger framework-based implementation Kotlin for Android App .
reference
- https://github.com/googlesamples/android-architecture/tree/todo-mvp-clean/
- https://fernandocejas.com/2014/09/03/architecting-android-the-clean-way/
Contacts and exchanges
Micro-channel public number of
individual micro letter
