android - 如何从适配器外部访问 Recyclerview.ViewHolder 参数？

Question

我已将 recyclerview 附加到 SnapHelper。然后我为recyclerview制作了scrollListener，每次该项目被捕捉到显示器的中心时，我都会找到捕捉到的 View ，然后我将通过finViewHolderForAdapterPosition()获取其viewHolder实例。现在我想要的是访问 ViewHolder 中创建的自定义变量。有什么办法可以访问它吗？基本上这个变量是在 onBindViewHolder() 中设置的，它包含自定义对象，其统计信息显示在这个快照 View 中。所以我想从该 View 中提取该 json 对象。

//inside onBindViewHolder()
holder.addressEntity = it

我已经尝试过，但未检测到此变量。仅可访问 itemView(作为参数在构造函数中发送的变量)。

addressRecyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
        override fun onScrollStateChanged(recyclerView: RecyclerView?, newState: Int) {
            if (newState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
                val centerView = snapHelper.findSnapView(addressRecyclerView.layoutManager)
                centerView!!.setBackgroundResource(R.drawable.payment_button_active)
                lastSnappedView = centerView
                val childViewHolder: RecyclerView.ViewHolder = recyclerView!!.findViewHolderForAdapterPosition(viewManager.getPosition(centerView))
                val selectedViewAddress: Address = childViewHolder.addressEntity //this doesnt work -- selectedViewAddress is red
                AndroidAssets.getInstance(context!!).deliveryAddress = selectedViewAddress 

            } else if (lastSnappedView != null){
                lastSnappedView!!.setBackgroundResource(R.drawable.payment_button_inactive)
                lastSnappedView = null
            }
        }
    })

ViewHolder 位于适配器内部作为内部类:

inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {

    //address item views
    var addressEntity: Address? = null
    val cityName: TextView = itemView.findViewById(R.id.cityName)
    val streetName: TextView = itemView.findViewById(R.id.streetName)
    val addressIcon: ImageView = itemView.findViewById(R.id.addressIcon)
}

Answer 1

你只需要把持有者变成你自己的，所以

val myHolder = (searchedHolder as ViewHolder)
//Access custom info with variable