Dagger 2.11 initial setup example

Dagger 2.11 initial setup example

Dagger 2.11 initial setup example

Step 1) on build.gradle dependencies

        compile "com.google.dagger:dagger:2.11",
        compile "com.google.dagger:dagger-android-support:2.11",
        kapt    "com.google.dagger:dagger-android-processor:2.11",
        kapt    "com.google.dagger:dagger-compiler:2.11",

Step 2) On your main component module:

@Module(
        includes = {
                ActivitiesBuilder.class, //this you have to create
                AndroidInjectionModule.class, //this is imported on dependencies
                ...
        }
)
public class CoreModule { ...}

Step 3) ActivitiesBuilder

@Module
abstract class ActivitiesBuilder {
    @ContributesAndroidInjector(modules = arrayOf(SomeFeatureModule::class))
    abstract fun someFeatureActivity(): SomeFeatureActivity
    
    //For each new activity, just create one more module and put an abstract method here
}

Step 3.1) Providing the activity

//If you are using MVP or any other architecture that needs a reverence to
//SomeFeatureActivity hidden behind an interface, you can do it in SomeFeatureModule
@Module
class SomeFeatureModule {

    @Provides
    fun provideView(view: SomeFeatureActivity): SomeFeatureView = view

    @Provides
    fun providePresenter(view: SomeFeatureView): SomeFeaturePresenter = SomeFeaturePresenter(view)
}

Step 4) On your Application class

public class MyApplication extends Application implements HasActivityInjector {
    @Inject DispatchingAndroidInjector<Activity> activityInjector;
    protected CoreComponent coreComponent;
    
    @Override public AndroidInjector<Activity> activityInjector() {
        return activityInjector;
    }
    
    @Override public void onCreate() {
        super.onCreate();

        coreComponent = DaggerCoreComponent.builder()
        ... //init any needed dependencies here
        .build()
        
        coreComponent.inject(this); //activityInjector has to be injected here by dagger
    }

(...)

}

Step 5) SomeFeatureActivity

class SomeFeatureActivity: AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        AndroidInjection.inject(this) //this had to be called before super.onCreate
        super.onCreate(savedInstanceState)
        ...
    }
}

Step 6) And thats it

If you need to inject fragments, you make your activity implement
HasFragmentInjector or HasSupportFragmentInjector similar to what you done on the application