为什么显示 java.lang.ClassCastException: android.text.SpannableString cannot be cast to java.lang.String？
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Why show java.lang.ClassCastException: android.text.SpannableString cannot be cast to java.lang.String?
提问by gio
When copying Stringfrom any browser page, pasteDataworks properly.
However when copying SpannedStringfrom a message sent item editor(field), the application crashes and shows this error message:
String从任何浏览器页面复制时，pasteData工作正常。但是，当SpannedString从消息发送项编辑器（字段）复制时，应用程序崩溃并显示以下错误消息：
java.lang.ClassCastException: android.text.SpannableString cannot be cast to java.lang.String
My code:
我的代码：
// since the clipboard contains plain text.
ClipData.Item item = clipBoard.getPrimaryClip().getItemAt(0);
// Gets the clipboard as text.
String pasteData = new String();
pasteData = (String) item.getText();
where the ClipboardManagerinstance defined as clipBoard, below:
其中ClipboardManager实例定义为clipBoard，如下：
clipBoard = (ClipboardManager) context.getSystemService(context.CLIPBOARD_SERVICE);
clipBoard.addPrimaryClipChangedListener(new ClipboardListener());
All I'm trying to do is use pasteDatain Stringformat.
How to get rid of this error?
Any help is appreciated.
所有我想要做的是使用pasteData中String的格式。如何摆脱这个错误？任何帮助表示赞赏。
采纳答案by Adem
SpannableString is not String directly. so, you can not cast. but, it can be converted to string. you can convert something to string with concatenating with empty string.
SpannableString 不是 String 直接。所以，你不能施法。但是，它可以转换为字符串。您可以通过连接空字符串将某些内容转换为字符串。
pasteData = "" + item.getText();
回答by gio
Returns a string with the same characters in the same order as in this sequence.
以与此序列中相同的顺序返回具有相同字符的字符串。
You need to use next code.
您需要使用下一个代码。
String pasteData = item.getText().toString();
You can not cast to android.text.SpannableStringbecause item.getText()returns CharSequence, there are a lot of implementations of it
你无法投射到android.text.SpannableString因为item.getText()回报CharSequence，也有很多的实现它
回答by SilentKiller
If your Spanned text only containing HTML content then you can convert it using Html.toHtml()
如果您的跨区文本仅包含 HTML 内容，那么您可以使用 Html.toHtml()
String htmlString = Html.toHtml(spannedText);
回答by Manju S B
It has worked for meString htmlString = String.valueOf(Html.fromHtml(contenttext,Html.FROM_HTML_MODE_COMPACT));
它对我有用String htmlString = String.valueOf(Html.fromHtml(contenttext,Html.FROM_HTML_MODE_COMPACT));
