当我滚动RecyclerView时，里面的项目会自动更改

Question

我是kotlin的新手，使用它是我的一个新项目，它与预订预约有关，我正在比较一个列表的数据，这些数据是预订的插槽与回收器视图项目的文本，当我做一些滚动时，数据会自动更新

BeforeScrolling

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AfterScrolling

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添加Else块时

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回收器视图适配器类

class TimesSlotAdapter(
    val context: Context,
    val timeSlotsList: List<TimeSlots>,
    val filledSlotList: List<BookedSlotsData>
) : RecyclerView.Adapter<TimesSlotAdapter.ViewHolder>() {
    private var mItemClickListener: OnItemClickListener? = null
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {

        return ViewHolder(
            LayoutInflater.from(
                context
            ).inflate(R.layout.item_timeslots, parent, false)
        )
    }

    override fun getItemCount() = timeSlotsList.size

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.bind(timeSlotsList[position])

        for (timeSlots in filledSlotList) {
            if (holder.textView.text.toString().equals(timeSlots.time.toString())) {
                Log.i("time1",timeSlots.time.toString())
                Log.i("time2",holder.textView.text.toString())
                holder.card.setBackground(context.resources.getDrawable(R.drawable.card_background))
                holder.itemView.isEnabled=false
            }
        }

        holder.itemView.setOnClickListener {
            mItemClickListener!!.onItemClick(
                holder.itemView,
                position,
                timeSlotsList[position]
            )
        }
    }

    interface OnItemClickListener {
        fun onItemClick(view: View, position: Int, model: TimeSlots)
    }

    fun SetOnItemClickListener(mItemClickListener: OnItemClickListener) {
        this.mItemClickListener = mItemClickListener
    }


    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView), View.OnClickListener {
        var textView: TextView = itemView.findViewById(R.id.timeSlots)
        var card: CardView = itemView.findViewById(R.id.card)
        fun bind(timeSlots: TimeSlots) {
            textView.text = timeSlots.name
        }

        init {
            itemView.setOnClickListener(this)
        }

        //4
        override fun onClick(v: View) {

        }
    }

}

预订的时隙DataModel

class BookedSlotsData {

    @SerializedName("time")
    @Expose
    var time: String? = null

}

时隙DataModel

data class TimeSlots(val name: String?)

适配器初始化

val adapter =
                TimesSlotAdapter(activity, viewModel.oldFilteredMorningTime, bookedTime)
            recyclerView.adapter = adapter

            adapter.SetOnItemClickListener(object : TimesSlotAdapter.OnItemClickListener {
                override fun onItemClick(view: View, position: Int, model: TimeSlots) {
                    var intent = Intent(context, AppointmentDetailsActivity::class.java)
                    intent.putExtra("Time Slots", model.name)
                    startActivity(intent)
                }

            })

Answer 1

这是因为这就是RecyclerView的工作方式，当你滚动并只使用当前加载到内存中的屏幕数据时，它会回收你的视图。

只要你滚动到底部，出现你的位置不匹配，你就会在Item中看到一些奇怪和意想不到的结果。

您只需为设计更改条件提供else块即可解决此问题，就像在onBindViewHolder中一样

         if (holder.textView.text.toString().equals(timeSlots.time.toString())) {
                Log.i("time1",timeSlots.time.toString())
                Log.i("time2",holder.textView.text.toString())

 holder.card.setBackground(context.resources.getDrawable(R.drawable.card_background))
                holder.itemView.isEnabled=false
            }
           else{
 holder.card.setBackground(context.resources.getDrawable(//your another drawable))
                holder.itemView.isEnabled=true
            }

这就是你可以解决它的方法。

Answer 2

我也有同样的问题，在研究了整个sof之后，holder.setIsRecyclable(false)；对我来说是有效的。

下面是适配器中oncreateviewholder示例。祝你好运:)

  View itemView = LayoutInflater.from(context)
            .inflate(R.layout.layout_time_slot, viewGroup, false);
    MyViewHolder holder = new MyViewHolder(itemView);

    holder.setIsRecyclable(false);

    return holder;
}