}
ConvertButton.setOnClickListener{
val amount = amountEt.text.toString().toDouble()
val tofield = values[Tomune.text.toString()]
val fromfield = values[from_menu.text.toString()]
var result = amount * (tofield!!.div( fromfield!!)) // error apper when i use .div() or / sign
showentext.setText(result.toString())
}
}
val tofield = values[Tomune.text.toString()]
Tomune.text.toString((是一个尚未将其转换为int的字符串。因此,您试图通过该字符串访问值数组,该字符串可能会返回一个无法分割的值