获取绑定ViewHolder的头寸范围

Question

我希望获得“活着”ViewHolders的范围。有我不能解决的问题。

class NotesRvAdapter : RecyclerView.Adapter<NoteDateViewHolder> {

    private var lastBindPosition = 0
    private var lastUnbindPosition = 10

    override fun onBindViewHolder(holder: NoteDateViewHolder, position: Int) {
        ...
        onScopeChanged()
    }

    fun onScopeChanged() {
        var maxPosition = 0
        var minPosition = 0
        if(lastBindPosition > lastUnbindPosition) {
            maxPosition = lastBindPosition
            minPosition = lastUnbindPosition
        } else {
            maxPosition = lastUnbindPosition
            minPosition = lastBindPosition
        }
        scopeListener.onChanged(NotesRequest(maxPosition, minPosition))
    }

    override fun onViewDetachedFromWindow(holder: NoteDateViewHolder) {
        lastUnbindPosition = holder.adapterPosition
        super.onViewDetachedFromWindow(holder)
    }

}

以随机顺序调用onBindViewHolder(...)和onViewDetachedFromWindow(...)。这不是唯一的问题：）

任何获得“活着”位置范围的想法？ LayoutManager只能提供第一个/最后一个可见项，而不是“绑定”。