Subcomponent.Builder -> Factory when using seedInstance to bind instance data

Question

I have an inherited code project that I am working on updating to the latest version of Dagger (2.25.2)

I want to switch from using the deprecated @Subcomponent.Builder to the newer @Subcomponent.Factory. My one sticking point is how to handle binding for instance variables to my view model. The current pattern is the same as is described in this blog post: https://medium.com/@minakamel/how-to-inject-bundle-arguments-to-viewmodel-607429829cf0

Basically using seedInstance to get the instance then using BindsInstance:

@Subcomponent.Builder
abstract class Builder: AndroidInjector.Builder<ExampleActivity>() {

    abstract override fun build(): ExampleComponent

    @BindsInstance
    abstract fun currency(currency: String): Builder

    override fun seedInstance(instance: ExampleActivity) {
       currency(instance.getCurrencyFromBundle())
    }
}

What I have been unable to find are very many examples of overriding the create method for @Subcomponent.Factory to bind the instance data.

Answer 1

To bind an instance using factory you need to pass it as an argument to factory method -

@Subcomponent.Factory
 interface Builder: AndroidInjector.Factory<ExampleActivity>() {

    fun create(@BindsInstance currency : String) : YourSubcomponentType

}

And the create method needs to return your SubComponent Type.