RecyclerView设置单选

/**
 * @author Benjamin
 * @description:
 * @date :2021.11.11 11:10
 */
class SideBarAdapter(private val itemClick: (LoginResultItem) -> Unit):ListAdapter<LoginResultItem,SideBarAdapter.ViewHolder>(
    object : DiffUtil.ItemCallback<LoginResultItem>() {
        override fun areItemsTheSame(
            oldItem: LoginResultItem,
            newItem: LoginResultItem
        ) =
            oldItem == newItem
        override fun areContentsTheSame(
            oldItem: LoginResultItem,
            newItem: LoginResultItem
        ) =
            oldItem == newItem
    }
) {
    private var currentPos = -1
    inner class ViewHolder(binding:SideBarRvItemBinding):RecyclerView.ViewHolder(binding.root){
        val root = binding.root
        private val sideBarName = binding.sideBarName
        val background = binding.background
        fun bind(loginResultItem: LoginResultItem){
            sideBarName.text = loginResultItem.name
        }
    }
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = ViewHolder(
        SideBarRvItemBinding.inflate(LayoutInflater.from(parent.context),parent,false)
    ).apply {
        background.setOnClickListener {
            itemClick(getItem(absoluteAdapterPosition))
            val temp = currentPos
            val currentlyPosition = it.tag as Int
            if (temp != currentlyPosition){
                currentPos = currentlyPosition
                notifyItemChanged(temp)
                it.isSelected = true
            }
        }
    }
    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.bind(getItem(position))
        holder.background.apply {
            isSelected = currentPos == position
            tag = position
        }
    }
}