Minimal MVP Android Dagger App

dagger package contains:

|-- components
    |-- ApplicationComponent.java
    |-- subcomponents
        |-- MainActivityComponent.java
|-- modules
    |-- ActivityBuilder.java
    |-- ApplicationModule.java
    |-- MainActivityModule.java

presenter package contains:

|-- MainPresenter.java

ui package contains:

|-- MainActivity.java
|-- MainView.java

The root contains the MainApplication

Dagger 2.10 introduced a new way for Android DI. Injecting fragments/activities are much easier now, all we need is to create ApplicationComponent that defines modules including a module the represents our activities/fragments

This example uses the new way in its simplest form possible. The MainActivity is injected, its MainPresenter is also injected and a function is called onCreate and lets not forget that the MainApplication is injected as well.

To add a new activity:

• Create a presenter

• Create view interface

• Create an activity

• Make the activity implement the view interface

• Inside the new activity, @inject the presenter

• Inside the new presenter, @inject the view

• Now that you did the obvious part, its time to work inside Dagger package

• inside subcomponents, create a new Component prefixed with activity name example: SecondActivityComponent and paste inside:

    @Subcomponent(modules = SecondActivityModule.class)
    public interface SecondActivityComponent extends AndroidInjector<SecondActivity> {
        @Subcomponent.Builder
        abstract class Builder extends AndroidInjector.Builder<SecondActivity>{}
    }
  

• update ActivityBuilder to include the new activity

• Last step, create a module inside the modules package named for example SecondActivityModule inside paste this:

    @Module
    public class SecondActivityModule {
        @Provides
        SecondView provideSecondView(SecondActivity secondActivity) {
            return secondActivity;
        }
    
        @Provides
        SecondPresenter provideSecondPresenter(SecondView secondView) {
            return new SecondPresenter(secondView);
        }
    }
  

This is just a helpful bootstrap for dagger 2.10+ application.

The intention is to keep it as a reference, and help new dagger users to jump start.