即使我将变量分配为 var，我也会收到“Val 无法重新签名错误”？

Posted 2023-04-18

【中文标题】即使我将变量分配为 var，我也会收到“Val 无法重新签名错误”？

【英文标题】：I get a "Val cannot be reasigned error" even though I assigned the variable as var?

【发布时间】：2021-09-04 13:00:02

【问题描述】：

我正在尝试向应用程序添加“复制到剪贴板”功能。我在图像按钮上添加了一个 setOnClickListener 用于复制并编写了下面的代码。我仍然在“clipBoard.primaryClip = clip”行上收到“val cannot be reassigned”错误

            var clipBoard: ClipboardManager = getActivity()?.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
            val StrEdtFirtname = etNoteDesc.text.toString()
            val clip = ClipData.newPlainText("Copied text",StrEdtFirtname)
            clipBoard.primaryClip = clip
            Toast.makeText(requireContext(), "Copied text", Toast.LENGTH_SHORT).show()
        

【参考方案1】：

试试下面的代码。

var clipBoard: ClipboardManager = getSystemService(CLIPBOARD_SERVICE) as ClipboardManager
     val StrEdtFirtname = etNoteDesc.text.toString()
    val clip = ClipData.newPlainText("Copied text",StrEdtFirtname)
    clipBoard.apply 
        setPrimaryClip(clip)