Элементы Recyclerview меняются при прокрутке в сценариях с несколькими представлениями. ⇐ Android

[Гость]

Hi I'm using recyclerview for handling multiviewType of the lists

but when i scroll the cells are changing sometimes

i referred many SO's answer but it didnt worked

override the getitemid as well but didnt worked need help for the following code

here is my code of my adapter:-

class Adapter(val onItemClick: (Data) -> Unit) : BaseRecyclerViewAdapter() { companion object { const val VIEW_LINK = 1 const val VIEW_POST = 2 const val VIEW_LOADER = 3 } override fun createItemViewHolder( parent: ViewGroup, viewType: Int ): BaseRecyclerViewHolder { val layoutInflater = LayoutInflater.from(parent.context) when (viewType) { VIEW_LINK -> { return LinkViewHolder( LayoutLinkPreviewBinding.inflate( layoutInflater, parent, false ) ) } VIEW_POST -> { return PostViewHolder( LayoutPostPreviewBinding.inflate( layoutInflater, parent, false ) ) } else -> { return LoadMoreViewHolder( ItemProgressLoadMoreBinding.inflate( layoutInflater, parent, false ).root ) } } } override fun bindItemViewHolder(holder: BaseRecyclerViewHolder, position: Int) { when (holder.itemViewType) { VIEW_LINK -> { items.let { (holder as LinkViewHolder).bind(it[position]) } } VIEW_POST -> { items.let { (holder as PostViewHolder).bind(it[position]) } } VIEW_LOADER -> { (holder as LoadMoreViewHolder).pdLoadMore.show() } } } override fun getItemViewType(position: Int): Int { return when (items[position].type) { "link" -> { VIEW_LINK } "post" -> { VIEW_POST } "media" -> { VIEW_POST } else -> { VIEW_LOADER } } } inner class LinkViewHolder(private val layoutLinkPreviewBinding: LayoutLinkPreviewBinding) : BaseRecyclerViewHolder(layoutLinkPreviewBinding.root) { private var coroutineScope: CoroutineScope? = null var link: String? = null override fun bind(item: Data) { ensureCoroutineScope() fetchLinkPreview(item) } } inner class PostViewHolder(private val postPreviewBinding: LayoutPostPreviewBinding) : BaseRecyclerViewHolder(postPreviewBinding.root) { override fun bind(item: Data) { setUpUI(item) } } inner class LoadMoreViewHolder(itemView: View) : BaseRecyclerViewHolder(itemView) { var pdLoadMore: loaderView init { pdLoadMore = itemView.findViewById(R.id.pdLoadMore) } override fun bind(item: ShowCaseData) {} } override fun getItemId(position: Int): Long { return items[position].hashCode().toLong() } }

base recycler:-

abstract class BaseRecyclerViewAdapter : RecyclerView.Adapter() { /** * list of all items */ private var _items = mutableListOf() var items: List = _items private set var isLoadingAdded = false /** * create view holder of recycler view item */ override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): T { return createItemViewHolder(parent, viewType) } /** * bind recycler view item with data */ override fun onBindViewHolder(holder: T, position: Int) { bindItemViewHolder(holder, position) } /* * If the payloads list is not empty,the ViewHolder is currently bound to old data and Adapter may run an efficient partial * update using the payload info. If the payload is empty, Adapter must run a full bind. */ override fun onBindViewHolder(holder: T, position: Int, payloads: MutableList) { if (payloads.isNotEmpty()) { bindItemViewHolderPayload(holder, position, payloads) } else { bindItemViewHolder(holder, position) } } /** * get count for visible count */ override fun getItemCount() = _items.size /** * abstract method to create custom view holder */ protected abstract fun createItemViewHolder( parent: ViewGroup, viewType: Int ): T /** * abstract method to bind custom data */ protected abstract fun bindItemViewHolder(holder: T, position: Int) /** * abstract method to bind custom data using payloads */ protected open fun bindItemViewHolderPayload(holder: T, position: Int,payloads: MutableList){} /** * add all items to list */ fun addAll(items: List, clearPreviousItems: Boolean = false) { if (clearPreviousItems) { this._items.clear() } this._items.addAll(items) notifyDataSetChanged() } /** * add all items to list with notifyrangechanged */ fun addAll(items: List, clearPreviousItems: Boolean = false , existingSize :Int) { if (clearPreviousItems) { this._items.clear() } this._items.addAll(items) notifyItemRangeInserted(existingSize,items.size) } /** * add item (at position - optional) */ fun addItem(item: S, position: Int = _items.size, clearPreviousItems: Boolean = false) { var adapterPosition = position if (clearPreviousItems) { this._items.clear() adapterPosition = 0 // set position to 0 after items arrayList gets clear } this._items.add(adapterPosition, item) notifyItemInserted(adapterPosition) } /** * remove item from position */ fun removeItem(position: Int) { if (position != -1) { _items.removeAt(position) notifyItemRemoved(position) } } /** * get item at position */ fun getItemAt(position: Int): S { return _items[position] } /** * update item at position */ fun updateItemAt(position: Int, item: S) { if (position != -1) { _items[position] = item notifyItemChanged(position) } } /** * update item at position with payload */ fun updateItemAtWithPayload(position: Int, item: S, payload:Any?) { if (position != -1) { _items[position] = item notifyItemChanged(position , payload) } } /** * To clear the adapter */ fun clearAdapter() { _items.clear() notifyDataSetChanged() } fun showLoadMore(loadMoreItem: S) { if (!isLoadingAdded) { isLoadingAdded = true addItem(loadMoreItem) } } fun hideLoadMore() { if (isLoadingAdded) { isLoadingAdded = false removeItem(itemCount - 1) } } fun isEmpty(): Boolean { return _items.size == 0 } }

please help Thanks in advance


Источник: https://stackoverflow.com/questions/781 ... -scenarios