更改列表項布局時 RecyclerView 滾動到頂部

Question

在我RecyclerView OnLongClicking一個項目我想通過設置一些更改項目的布局TextViews到View.GONE和他人View.VISIBLE 。 一切正常，除了當我長按該項目並且布局更改時，我的RecyclerView滾動到頂部，如果它在底部，我將無法再看到 LongPressed 視圖。

這是我寫的ListAdapter ：

class AssetsListAdapter(
    private val onAssetClickListener: OnAssetClickListener,
    private val onAssetLongClickListener: OnAssetLongClickListener
) :
    ListAdapter<Asset, AssetsListAdapter.ViewHolder>(
        AssetDiffCallback()
    ) {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val inflater = LayoutInflater.from(parent.context)
        return ViewHolder(
            inflater.inflate(
                R.layout.list_item,
                parent,
                false
            )
        )
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.bind(getItem(position), onAssetClickListener, onAssetLongClickListener)
    }

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

        fun bind(
            asset: Asset,
            onAssetClickListener: OnAssetClickListener,
            onAssetLongClickListener: OnAssetLongClickListener
        ) {
            itemView.item_name.text = asset.name

            // Set icons relatively to category
            when (asset.category) {
                "Cash" -> itemView.item_image.setImageResource(R.drawable.ic_cash)
                "Bank Account" -> itemView.item_image.setImageResource(R.drawable.ic_bank)
                "Investment" -> itemView.item_image.setImageResource(R.drawable.ic_invest)
                "Salary" -> itemView.item_image.setImageResource(R.drawable.ic_job)
            }

            itemView.setOnClickListener {
                onAssetClickListener.onAssetClick(asset)
            }

            // On long click listeners pulls up quick action options
            itemView.setOnLongClickListener {
                view.item_end_text.visibility = View.GONE
                view.quick_actions_layout.visibility = View.VISIBLE
                onAssetLongClickListener.onAssetLongClick(asset, itemView)
                true
            }
        }

    }

    class AssetDiffCallback : DiffUtil.ItemCallback<Asset>() {
        override fun areItemsTheSame(oldItem: Asset, newItem: Asset): Boolean {
            return oldItem.assetId == newItem.assetId
        }

        override fun areContentsTheSame(oldItem: Asset, newItem: Asset): Boolean {
            return oldItem == newItem
        }
    }

    interface OnAssetClickListener {
        fun onAssetClick(asset: Asset)
    }

    interface OnAssetLongClickListener {
        fun onAssetLongClick(asset: Asset, view: View)
    }

}

Answer 1

好的，所以我發現如果你設置View.GONE整個項目被重繪並重置RecyclerView ？ 因為將它設置為View.INVISIBLE解決了這個問題。

itemView.setOnLongClickListener {
            view.item_end_text.visibility = View.GONE
            view.quick_actions_layout.visibility = View.VISIBLE
            onAssetLongClickListener.onAssetLongClick(asset, itemView)
            true
        }

到

itemView.setOnLongClickListener {
                view.item_end_text.visibility = View.INVISIBLE
                view.quick_actions_layout.visibility = View.VISIBLE
                onAssetLongClickListener.onAssetLongClick(asset, itemView)
                true
            }