Android studio onmenuitemclicklistener 函数给出了意想不到的类型规范

Question

我目前正在尝试使用 kotlin 在我的 android studio 项目中实现一个按钮。我对kotlin不是很熟悉，所以参考这个教程：https://www.geeksforgeeks.org/popup-menu-in-android-with-example/

我想在我的 android 应用程序中创建一个弹出菜单。

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

       navigateToMapFragmentIfNeeded(intent)
       // mapbox
        Mapbox.getInstance(this, getString(R.string.mapbox_access_token));
        setContentView(R.layout.activity_main)
        /* Referencing and Initializing the button */
        var popbutton: Button = findViewById<View>(R.id.clickBtn) as Button

        // Setting onClick behavior to the button
        popbutton.setOnClickListener(View.OnClickListener { // Initializing the popup menu and 
        //giving the reference as current context
            val popupMenu = PopupMenu(this@MainActivity, popbutton)

            // Inflating popup menu from popup_menu.xml file
            popupMenu.getMenuInflater().inflate(R.menu.popup_menu, popupMenu.getMenu())


            // problem line below
            popupMenu.setOnMenuItemClickListener(PopupMenu: OnMenuItemClickListener(){
                fun onMenuItemClick(menuItem: MenuItem): Boolean {
                    // Toast message on menu item clicked
                    Toast.makeText(
                        this@MainActivity,
                        "You Clicked " + menuItem.getTitle(),
                        Toast.LENGTH_SHORT
                    ).show()
                    return true
                }
            })
            // Showing the popup menu
            popupMenu.show()
        })
        // Request permission
        requestPermission()
    }

当我尝试在我的模拟器中运行时，我在上面的代码中将这些错误注释为“下面的问题行”：
“意外的类型规范”
“期待，”
“期待一个表达”

谁能告诉我如何解决这个问题？

感谢任何和所有帮助！谢谢

Answer 1

去掉setOnMenuItemClickListener最后一行最后的)：

    popupMenu.setOnMenuItemClickListener(PopupMenu: OnMenuItemClickListener(){
        fun onMenuItemClick(menuItem: MenuItem): Boolean {
            // Toast message on menu item clicked
            Toast.makeText(
                this@MainActivity,
                "You Clicked " + menuItem.getTitle(),
                Toast.LENGTH_SHORT
            ).show()
            return true
        }
    }