Android multimodule + MVP + Dagger 2
TLDR;
As I often use mutlimodule project with MVP I decided to extract a skeleton for future uses.
Idea is to have app that is divided into couple of modules:
Sceleton contains dagger 2 setup that injects exemplary classes.
The main problem for me when setuping dagger was isolation of modules. Every module knows only about module directly below it. So when I started to define Dagger Modules in corresponding modules the app was not building. I encountered problems such as :
class cannot be provided without an @Provides-annotated method.
I managed to setup skeleton that overcomes all those problems using submodules.
That may be not the only way. But it works for me.
Going from UI to bottom:
ps: sorry for pics, this blog sucks..
App module:
UI of our application and context provider. The application type module.
Sees (compiles) the ':repo' and ':presenter' modules.
It supplies
- AppModule (Context provider)
- RepoModule (Repo implementation provider)
to layers below.
AppComponent contains PresenterSubComponent as subComponent.
Presenter module:
Handles the ui logic and forwards execution of business rules to UseCase.
Presenter subcomponent is only dependant of PresenterModule which.
UseCase module:
Build exactly the same as Presenter module. Note that UseCase uses RepoBase - the abstraction of Repo.
Repo Module:
Implementation of our data module's RepoBase.
Data Module
Hope somebody will find it useful. Critique and hints much appreaciated.
Next: Adding rxJava on top of skeleton.
