从Java到Kotlin的重构，泛型遇到了麻烦

Question

can anyone help with refactoring this class to Kotlin, having trouble with generics conversation.

Model:

abstract class ViewHolderDataBinder<DM : ViewHolderDataModel,
        VH : RecyclerView.ViewHolder>(val viewType: Int) {

    abstract fun createViewHolder(parent: ViewGroup): VH

    abstract fun bindView(model: DM, holder: VH)
}

Java code that want to convert in to Kotlin:

SparseArray<ViewHolderDataBinder> viewHolderDataBinders = new SparseArray<>();

And I want to refactor it in to this

  val viewHolderDataBinders = SparseArray<ViewHolderDataBinder>()

but Kotlin requires to add type parameters in to ViewHolderDataBinder .

Is there any way to not add type parameter as It was not necessary in Java?

UPDATE

if I use private val viewHolderDataBinders = SparseArray<ViewHolderDataBinder<*, *>>()

then getting error here binder.bindView(item, holder)

it says that item and holder requires Nothing but Found .....

Answer 1

您可以使用此*符号将任何对象添加到数组中。

val viewHolderDataBinders = SparseArray<ViewHolderDataBinder<*, *>>()