BookInjection.kt

BookInjection.kt

@Subcomponent
interface BookComponent {

  @Subcomponent.Builder
  interface Builder {
    @BindsInstance fun bookView(bookView: BookView): Builder
    fun build(): BookComponent
  }

  val presenter: BookPresenter
}

@Component(modules = ...)
interface ApplicationComponent {
  ...

  // we can simply expose the subcomponent builder now
  val bookComponentBuilder: BookComponent.Builder
}

// and here's how it looks like in the Activity
private val presenter =
  MyApplication
    .component
    .bookComponentBuilder
    .bookView(this)
    .build()
    .presenter