如何以编程方式在Edittext中加粗或斜体或下划线答案

【问题标题】：How to bold or italic or underline the selected text in Edittext programatically如何以编程方式在Edittext中加粗或斜体或下划线
【发布时间】：2016-08-28 09:11:51
【问题描述】：

我必须开发一个像便笺这样的应用程序。用户在 Edittext 中输入文本，在选择文本时，我将打开弹出窗口以选择（粗体、斜体、下划线）之类的选项。当用户选择选项时，我需要更改所选文本..

有人经历过吗？

【问题讨论】：

到目前为止你尝试了什么？
stackoverflow.com/questions/10714636/…
我从用户那里得到了选定的文本。如何在edittext中加粗显示？
也许你会从这个 https://github.com/wasabeef/richeditor-android 或在谷歌搜索 RichEdittext 得到帮助
我会检查并回复你

标签： android android-edittext bold

【解决方案1】：

你试过了吗？

editText.setTypeface(null, Typeface.BOLD_ITALIC);
editText.setTypeface(null, Typeface.BOLD);
editText.setTypeface(null, Typeface.ITALIC);
editText.setTypeface(null, Typeface.NORMAL);

【讨论】：

【解决方案2】：

科特林

更改Typeface.BOLD、Typeface.ITALIC 或UnderlineSpan()

val spannableString: Spannable = SpannableStringBuilder(editText.text)
        spannableString.setSpan(
        StyleSpan(Typeface.BOLD),
            editText.selectionStart,
            editText.selectionEnd,
            0
        )
editText.setText(spannableString)

【讨论】：

它不断格式化编辑文本中的整个字符串

【解决方案3】：

如果您找到了弹出选项的方法以及如何检索所选选项（粗体，斜体，下划线），然后使用它来格式化文本

private void formatText(EditText editText) {
    int end = editText.length();

    //get the selected text position as integer
    start = editText.getSelectionStart();
    stop = editText.getSelectionEnd();
    //check if the user started the selection from the left or the right
    if (start > stop) {
        stop = editText.getSelectionStart();
        start = editText.getSelectionEnd();
    }

        //gets the texts as html incase if previous formatting exists
    String textBefore = Html.toHtml(new SpannableString(text.getText().subSequence(0, start)));
    String selectedText = Html.toHtml(new SpannableString(text.getText().subSequence(start, stop)));
    String textAfter = Html.toHtml(new SpannableString(text.getText().subSequence(stop, end)));
    //Check if the selected text is empty ie if the did not select anything
    if (!selectedText.equals("") || start != stop) {
       //format the text
       String formatted = "<b>" + selectedText + "</b>";
       //build back the text
        StringBuilder builder = new StringBuilder();
        builder.append(textBefore);
        builder.append(Html.toHtml(formatted));
        builder.append(textAfter);

        editText.setText(Html.fromHtml(builder.toString()));
        //make the cursor stay after the selected text
        //you can also make the selected text selected here
        editText.setSelection(stop); 
        //clear your local variables
        textbefore = "";
        textafter = "";
        selectedText = "";
    }
    else {
        //you can also use snack bar here
        Toast.makeText(context, "select a text", Toast.LENGTH_SHORT).show();
    }
}

我认为这应该适合你

【讨论】：