如何在RecycleViwer中用Kotlin编写PopupMenu？

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

fun RecyclerView.showPopupMenu(view: View, menuRes: Int, onItemClick: (Int) -> Unit) {
    val popupMenu = PopupMenu(context, view)
    popupMenu.inflate(menuRes)
    popupMenu.setOnMenuItemClickListener { item ->
        onItemClick(item.itemId)
        true
    }
    popupMenu.show()
}

class MyAdapter(private val items: List<String>) : RecyclerView.Adapter<MyAdapter.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.item_layout, parent, false)
        return ViewHolder(view)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val item = items[position]
        holder.itemView.setOnClickListener { view ->
            view.showPopupMenu(view, R.menu.popup_menu) { itemId ->
                // 处理菜单项的点击事件
                when (itemId) {
                    R.id.menu_item1 -> {
                        // 执行菜单项1的操作
                    }
                    R.id.menu_item2 -> {
                        // 执行菜单项2的操作
                    }
                    // 其他菜单项的处理
                }
            }
        }
    }

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

    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView)
}

<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/menu_item1"
        android:title="菜单项1" />
    <item
        android:id="@+id/menu_item2"
        android:title="菜单项2" />
    <!-- 其他菜单项 -->
</menu>

val recyclerView: RecyclerView = findViewById(R.id.recyclerView)
val adapter = MyAdapter(listOf("Item 1", "Item 2", "Item 3"))
recyclerView.adapter = adapter
recyclerView.layoutManager = LinearLayoutManager(this)