类型参数不在其范围之内:应该是'RecyclerView.ViewHolder!‘的子类型！

Question

类StudentAdapter: StudentAdapter{私有变量stdList: ArrayList = ArrayList()

fun addItems(items: ArrayList<StudentModel>){
    this.stdList = items
}


override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = StudentViewHolder(
    LayoutInflater.from(parent.context).inflate(R.layout.card_items_std, parent,false)
)

override fun onBindViewHolder(holder: StudentViewHolder, position: Int) {
    val std = stdList[position]
    holder.bindView(std)
}

override fun getItemCount(): Int {
    return stdList.size
}

class StudentViewHolder(var view: View): RecyclerView(view){
    private var id = view.findViewById<TextView>(R.id.tvId)
    private var name = view.findViewById<TextView>(R.id.tvName)
    private var email = view.findViewById<TextView>(R.id.tvEmail)
    private var btnDelete = view.findViewById<Button>(R.id.btnDelete)

    fun bindView(std: StudentModel){
        id.text = std.id.toString()
        name.text= std.name.toString()
        email.text = std.email.toString()
    }
}

}

Answer 1

视图持有者应该扩展RecyclerView.ViewHolder(view)

class StudentViewHolder(var view: View): RecyclerView.ViewHolder(view){
    private var id = view.findViewById<TextView>(R.id.tvId)
    private var name = view.findViewById<TextView>(R.id.tvName)
    private var email = view.findViewById<TextView>(R.id.tvEmail)
    private var btnDelete = view.findViewById<Button>(R.id.btnDelete)

    fun bindView(std: StudentModel){
        id.text = std.id.toString()
        name.text= std.name.toString()
        email.text = std.email.toString()
    }
}

这里有很好的文档可供参考