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，每次项目被捕捉到显示的中心时，我都会找到捕捉到的视图，然后我将通过 finViewHolderForAdapterPosition() 获取它的 viewHolder 实例。现在我想要的是访问在 ViewHolder 中创建的自定义变量。有什么方法可以访问它吗？基本上这个变量是在 onBindViewHolder() 中设置的，它包含自定义对象，其统计信息显示在此快照视图中。所以我想从那个视图中提取 json 对象。

//inside onBindViewHolder()
holder.addressEntity = it

我试过了，但是没有检测到这个变量。只能访问 itemView（在构造函数中作为参数发送的变量）。

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 inside adapter as inner class:

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

你只需要将持有人投为自己的，所以

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

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

How to access Recyclerview.ViewHolder params from outside of adapter?

android

kotlin

android-viewholder

android-recyclerview