添加 setTextColor 后，OnItemClickListener 在 recyclerView 中无法正常工作？

debugcn 发表于 Dev

阿里·阿尔梅斯巴

我有一个包含 recyclerview 的片段，该视图显示 cardviews 中的时间段，如下所示

我想要的是：如果用户单击卡片视图，单词可用更改为完整，文本颜色变为红色，如下所示，单击 7:30 插槽时

问题：在 onbindViewHolder 中将 setTextColor() 添加到 textview 后，更改（文本为“Full”，颜色为红色）适用于单击的卡片，但是当我滚动 recyclerview 时，我发现另一张卡片将文本颜色更改为红色而不更改在随机位置文本到“完整”！

我的适配器代码： class TimeSlotAdapter(private val timeSlotsList: ArrayList): RecyclerView.Adapter() {

private var mListener: OnItemClickListener? = null

interface OnItemClickListener {
          fun onItemClick(position: Int)
}

fun setOnItemClickListener (listener: OnItemClickListener) {
    mListener = listener
}

class TimeSlotViewHolder(card: View, listener: OnItemClickListener?): RecyclerView.ViewHolder(card){

    var mCardTime: TextView = card.findViewById(R.id.timeTV)
    var mAvailability: TextView = card.findViewById(R.id.availabilityTV)

    init {

        card.setOnClickListener {
            if (listener != null) {
                val position = adapterPosition
                if (position != RecyclerView.NO_POSITION) {
                    listener.onItemClick(position)
                }
            }
        }
    }
}

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TimeSlotViewHolder {
    val v = LayoutInflater.from(parent.context).inflate(R.layout.time_slot, parent, false)
    return TimeSlotViewHolder(v, mListener)
}

override fun getItemCount(): Int = timeSlotsList.size

override fun onBindViewHolder(holder: TimeSlotViewHolder, position: Int) {
    val currentItem = timeSlotsList[position]

    holder.mCardTime.text = currentItem.cardTime
    holder.mAvailability.text = currentItem.availability

    if (currentItem.isSelected) {

    // the problem when I add the below
        holder.mAvailability.setTextColor(Color.RED)
    }
}

活动片段代码： class ReserveTimeFragment : Fragment() {

private var timeSlotsList: ArrayList<TimeSlot>? = null

private var mRecyclerView: RecyclerView? = null
private var mAdapter: TimeSlotAdapter? = null
private var mLayoutManager: RecyclerView.LayoutManager? = null

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {

    val view = inflater.inflate(R.layout.fragment_reserve_time, container, false)

    mRecyclerView = view.findViewById(R.id.recyclerViewLO)

    createTimeSlotsList()
    buildRecyclerView()

    return view
}

fun buildRecyclerView() {
    mRecyclerView!!.setHasFixedSize(true)
    mLayoutManager = LinearLayoutManager(activity)
    mAdapter = TimeSlotAdapter(timeSlotsList!!)

    mRecyclerView!!.layoutManager = mLayoutManager
    mRecyclerView!!.adapter = mAdapter

    mAdapter!!.setOnItemClickListener(object : TimeSlotAdapter.OnItemClickListener {
        override fun onItemClick(position: Int) {
            selectedItem(position, "Full", false)
        }
    })
}

fun selectedItem(position: Int, text: String, selected: Boolean) {
    timeSlotsList!![position].changeAvailability(text)
    timeSlotsList!![position].selecteditem(selected)
    mAdapter!!.notifyDataSetChanged()
}

private fun createTimeSlotsList() {
    timeSlotsList = ArrayList()
    timeSlotsList!!.add(TimeSlot("07:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("08:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("08:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("09:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("09:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("10:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("10:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("11:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("11:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("12:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("12:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("13:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("13:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("14:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("14:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("15:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("15:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("16:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("16:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("17:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("17:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("18:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("18:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("19:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("19:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("20:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("20:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("21:00", "Available", false))
    timeSlotsList!!.add(TimeSlot("21:30", "Available", false))
    timeSlotsList!!.add(TimeSlot("22:00", "Available", false))

}

}

请问这个问题怎么解决？

肯

    if (currentItem.isSelected) {

    // the problem when I add the below
        holder.mAvailability.setTextColor(Color.RED)
    }

我还没有测试过这段代码，但根据我的经验，它应该是：

    if (currentItem.isSelected) {
        holder.mAvailability.setTextColor(Color.RED)
    } else {
        holder.mAvailability.setTextColor(Color.GREEN)
    }

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