Presenteract | MeteorJS Application to create and run | Frontend Framework library

Your Java code actually has a type safety problem: PresenterActivity

uses a raw type and when you later write presenter.attachView(this) you don't know whether you can attach this, but raw type means the compiler doesn't warn you. Kotlin doesn't let you hide it like this.

am assuming Presenter is a subclass of Presenter, i have a feeling am wrong

in actually means Presenter is a super-type of Presenter, not a subtype. See https://kotlinlang.org/docs/reference/generics.html (or search for covariance and contravariance, there are a lot of explanations on Stack Overflow and otherwise, though more for Scala than Kotlin but the idea is the same).

I think the simplest solution would be something like

Ok I got it.

The Problem was the Callback method or to be more specific inside the AsyncTask.