嵌套的回收者视图无法显示两个独立的列表

Question

我有一个垂直聊天recycler-view，我试图显示多个水平recycler-view's，其中包含“ carousel”的名片视图。我能够使水平视图膨胀，但是当我尝试在父视图中添加两个相同类型的水平视图作为独立项目时，我要么将新数据添加到原始视图中，然后显示两次，或者如果我清除了旧数组新数据替换了recycler-view中的旧数据，而第二个数据未添加。

我不确定这是否是由于我没有为每个水平视图或某些阵列问题生成单个适配器。

我的adapter世代，在父回收者视图的onBindViewHolder中被调用：

fun generateAdapter(holder: ViewHolder): CarouselAdapter{
        val layoutManager = LinearLayoutManager(appContext, LinearLayoutManager.HORIZONTAL, false )

        holder.carouselView.layoutManager = layoutManager
        val adapterCarousel = CarouselAdapter()
        holder.carouselView.adapter = adapterCarousel

        snapHelper.attachToRecyclerView(holder.carouselView)
        holder.carouselView.addItemDecoration(ItemOffsetDecoration(12))


        holder.carouselView.isNestedScrollingEnabled = false
        layoutManager.isSmoothScrollbarEnabled = true
        layoutManager.stackFromEnd = true

        return adapterCarousel
    }

将数据调用到子回收者视图中：

"rates" -> {
                if (items[i].ratesData != null) {
                    val adapter = generateAdapter(holder)
                    for (j in 0 until (items[i].ratesData!!.size)) {
                        adapter.addCarousel(ChatNew(items[i].msgTime, null, null, null, items[i].ratesData!![j], null, null, null, null))
                    }
                }
                //ParseHelper.clearArrays()

            }

子适配器：

class CarouselAdapter : RecyclerView.Adapter<ViewHolderCarousel>() {

    private val RATES = 1
    private val IMG_BUTTON = 2
    private val IMG_NO_BUTTON = 3
    private val BLUE = 4
    private val NO_IMG_BUTTON = 5
    private val ERROR = 0

    lateinit var type : String

    var items: ArrayList<ChatNew> = ArrayList()



    fun addCarousel(carousel: ChatNew){
        items.add(carousel)

        notifyItemInserted(itemCount)

    }


    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolderCarousel {
        return when(viewType) {
            RATES -> RatesViewHolderNew(LayoutInflater.from(appContext).inflate(R.layout.carousel_rate, parent, false))
            IMG_BUTTON -> ImgButtonViewHolder(LayoutInflater.from(appContext).inflate(R.layout.carousel_img_btn, parent, false))
            IMG_NO_BUTTON -> ImgNoButtonViewHolder(LayoutInflater.from(appContext).inflate(R.layout.carousel_img_no_btn, parent, false))
            NO_IMG_BUTTON-> NoImgButtonViewHolder(LayoutInflater.from(appContext).inflate(R.layout.carousel_no_img_btn, parent, false))
            else -> BlueViewHolder(LayoutInflater.from(appContext).inflate(R.layout.carousel_noimg_nobtn, parent, false))
        }
    }

    override fun getItemCount(): Int {
        return items.size

    }

    override fun onBindViewHolder(holder: ViewHolderCarousel, i: Int) {
        type = findType(holder)

        when (type){
            "rates" -> {
                val ri = items[i]
                //for (i in 0 until (ri.ratesData!!.size)){
                    holder.pnView.text = ri.ratesData?.pn
                    holder.mpView.text =ri.ratesData?.mp
                    holder.itView.text = ri.ratesData?.it
                    holder.brView.text = ri.ratesData?.br
                    holder.pfView.text = ri.ratesData?.pf
                    holder.aprcView.text = ri.ratesData?.aprc
                    holder.tpView.text = ri.ratesData?.tp
                    holder.headDivider!!.setBackgroundColor(ContextCompat.getColor(appContext!!, R.color.NWBlue))
               // }

            }
            "carousel button" -> {
                val ci = items[i]
                holder.imgView.setImageResource(ci.carouselData?.img!!)
                holder.number.text = ci.carouselData?.number
                holder.title.text = ci.carouselData?.title
                holder.content.text = ci.carouselData?.content
                holder.magicString.text = ci.carouselData?.magicString

            }
            "img no button" -> {
                val ci = items[i]
                holder.imgViewNoBtn.setImageResource(ci.carouselData?.img!!)
                holder.numberNoBtn.text = ci.carouselData?.number
                holder.titleNoBtn.text = ci.carouselData?.title
                holder.contentNoBtn.text = ci.carouselData?.content
                holder.noButtonString.text = ci.carouselData?.noButtonString
            }
            "no img no button" -> {
                val ci = items[i]
                holder.imgViewNoImgNoBtn.setBackgroundColor(ContextCompat.getColor(appContext!!,R.color.NWBlue))
                holder.numberNoImgNoBtn.text = ci.carouselData?.number
                holder.titleNoImgNoBtn.text = ci.carouselData?.title
                holder.contentNoImgNoBtn.text = ci.carouselData?.content
            }
            "no img button" -> {
                val ci = items[i]
                holder.imgViewNoImg.setBackgroundColor(ContextCompat.getColor(appContext!!,R.color.NWBlue))
                holder.numberNoImg.text = ci.carouselData?.number
                holder.titleNoImg.text = ci.carouselData?.title
                holder.contentNoImg.text = ci.carouselData?.content
                holder.magicStringNoImg.text = ci.carouselData?.magicString

            }
        }
    }

    override fun getItemViewType(i: Int): Int {

        return when (items.isNotEmpty()) {
            true -> {
                when {
                    items[i].ratesData != null -> RATES
                    items[i].carouselData != null -> {
                        when (items[i].carouselData?.img != null) {
                            true -> {
                                return if (items[i].carouselData?.magicString != null) {
                                    //has image and button
                                    IMG_BUTTON
                                } else {
                                    //has image but no button
                                    IMG_NO_BUTTON
                                }
                            }
                            false -> {
                                return if (items[i].carouselData?.magicString != null) {
                                    //has no image but button
                                    NO_IMG_BUTTON
                                } else {
                                    //has no image and no button
                                    BLUE
                                }
                            }
                        }

                    }
                    else -> ERROR
                }

            }
            false -> ERROR
        }
    }



    fun findType(holder: ViewHolderCarousel): String {
        return when (holder) {
            is RatesViewHolderNew -> "rates"
            is ImgButtonViewHolder -> "carousel button"
            is ImgNoButtonViewHolder -> "img no button"
            is NoImgButtonViewHolder -> "no img button"
            is BlueViewHolder -> "no img no button"
            else -> "error"
        }
    }

}
open class ViewHolderCarousel(view: View) : RecyclerView.ViewHolder(view) {

        // looks at the view and finds components on that view
        // carousel for rates
        val headDivider: LinearLayout? = view.head_divider
        val pnView = view.pn_view
        val mpView = view.mp_view
        val itView = view.it_view
        val brView = view.br_view
        val pfView = view.pf_view
        val aprcView = view.aprc_view
        val tpView = view.tp_view

        //TODO: set up links for "r" sections

        //carousel with img and button
        val imgView = view.imageView_btn
        val number = view.number_btn
        val title = view.title_btn
        val content = view.content_btn
        val magicString = view.carousel_button_btn

        //carousel with img but no button
        val imgViewNoBtn = view.imageView_no_btn
        val numberNoBtn = view.number_no_btn
        val titleNoBtn = view.title_no_btn
        val contentNoBtn = view.content_no_btn
        val noButtonString = view.magic_string_no_btn

        //carousel with no img or button
        val imgViewNoImgNoBtn = view.imageView_no_img_no_btn
        val numberNoImgNoBtn = view.number_no_img_no_btn
        val titleNoImgNoBtn = view.title_no_img_no_btn
        val contentNoImgNoBtn = view.content_no_img_no_btn

        val imgViewNoImg = view.imageView_no_img
        val numberNoImg = view.number_no_img
        val titleNoImg = view.title_no_img
        val contentNoImg = view.content_no_img
        val magicStringNoImg = view.carousel_button_no_img

    }

class RatesViewHolderNew(itemView: View) : ViewHolderCarousel(itemView)

class ImgButtonViewHolder(itemView: View) : ViewHolderCarousel(itemView)

class ImgNoButtonViewHolder(itemView: View) : ViewHolderCarousel(itemView)

class NoImgButtonViewHolder(itemView: View) : ViewHolderCarousel(itemView)

class BlueViewHolder(itemView: View) : ViewHolderCarousel(itemView)

任何有关如何确保每次我添加新的轮播数据集的想法都将被理解为父视图中的独立项。

Answer 1

事实证明，您可以通过将父适配器/视图中的每个附加项作为异步任务来解决此问题。不确定为什么会奏效，但没有抱怨。

doAsync {
 adapter.addChatMessage(Chat(time, null, null, null, contentRates, null, null, null, null))
}