Kotlin AlertDialog按钮不运行lambda或存储在变量中的功能

Question

我正在尝试创建一个有助于创建AlertDialog消息的新类。该类由收集所有参数（标题，内容/文本，按钮）的函数组成，并自动显示弹出窗口。

fun createPopupMessage(
    context: Context,         // get aplication context
    title: String? = null,    // get desired title as parameter
    content: String? = null,  // get content as a text
    button1: String? = null,  // define button1 text
    function1: Unit? = null,  // define button1 command (get some function)
    button2: String? = null,  // define button2 text
    function2: Unit? = null   // define button2 command (get some function)
) {
    val message = AlertDialog.Builder(context)
    if (title != null) message.setTitle(title)
    if (content != null) message.setMessage(content)
    if (button1 != null) message.setPositiveButton(button1) {_, _ -> function1} // ALERT: The expression "function1" is unused
    if (button2 != null) message.setNegativeButton(button2) {_, _ -> kotlin.run { function2 }} // ALERT: The expression "function2" is unused too even whith kotlin.run command.
    message.show()
}

问题在于，当我尝试将函数存储在函数1 或 function2 参数中时，按下按钮时不会执行该函数，但是当 creatsepopopupupmessage（ ）是创建的。

// running application
createPopupMessage(
            context = this,
            title = "Olá, mundo!",
            content = "Testando um novo comando ^-^",
            button1 = "Ok",
            function1 = myFunction() // myFunction is called and executed here :/
        )
// continue application

如何将myfunction（）存储在 function1 变量中并仅在按下按钮时运行它？

注意：我尝试使用 function1 = {_-＆gt; myfunction} 作为lambda，但也行不通。 （（（单位） - ＆gt; unit）？或（（任何） - ＆gt; uniT）？？

我尝试将函数1类型更改为 帮助：d

Answer 1

如果您需要不使用参数的lambda，则应将其定义为：

function1: ()->Unit

然后将其称为：

function1()

因此应该像这样：

fun createPopupMessage(
    context: Context,         // get aplication context
    title: String? = null,    // get desired title as parameter
    content: String? = null,  // get content as a text
    button1: String? = null,  // define button1 text
    function1: (()->Unit)? = null,  // define button1 command (get some function)
    button2: String? = null,  // define button2 text
    function2: (()->Unit)? = null   // define button2 command (get some function)
) {
    val message = AlertDialog.Builder(context)
    if (title != null) message.setTitle(title)
    if (content != null) message.setMessage(content)
    if (button1 != null) message.setPositiveButton(button1) { _, _ -> function1?() } 
    if (button2 != null) message.setNegativeButton(button2) { _, _ -> function2?() }
    message.show()

}