Question

我正在使用此代码从开始到结束删除可跨越文本的格式。问题是它正在成功运行，但文本中的最后一个字符仍然是粗体（或斜体/下划线）。

removeSpan未处理文本中的最后一个字符

            int startSelection = 0;
            int endSelection = text.length();
            if(startSelection>endSelection){
                startSelection  = text.getSelectionEnd();
                endSelection = text.getSelectionStart();
            }

            Spannable str = text.getText();
            StyleSpan[] ss = str.getSpans(startSelection, endSelection, StyleSpan.class);
            for (int i = 0; i < ss.length; i++) {
                if (ss[i].getStyle() == android.graphics.Typeface.BOLD) {
                    str.removeSpan(ss[i]);
                }
                if (ss[i].getStyle() == android.graphics.Typeface.ITALIC) {
                    str.removeSpan(ss[i]);
                }
            }

            UnderlineSpan[] ulSpan = str.getSpans(startSelection, endSelection, UnderlineSpan.class);
            for (int i = 0; i < ulSpan.length; i++) {
                str.removeSpan(ulSpan[i]);
            }

            str.removeSpan(ss[1]);

            text.setText(str);

Answer 1

如果您想从文本中删除所有范围，请使用以下命令：

Spannable str = text.getText();    
Object spansToRemove[] = str.getSpans(startSelection, endSelection, Object.class);
    for(Object span: spansToRemove){
        if(span instanceof CharacterStyle)
            spannable.removeSpan(span);
    }

Answer 2

我稍微更改了代码。看一看。我已经删除了循环中的if条件。它现在正在运作

                fromSelectionSpan = true;
                int startSelection = 0;
                int endSelection = text.length();

                Spannable str = text.getText();
                StyleSpan[] ss = str.getSpans(startSelection, endSelection, StyleSpan.class);
                for (int i = 0; i < ss.length; i++) {

                    str.removeSpan(ss[i]);
                }

                UnderlineSpan[] ulSpan = str.getSpans(startSelection, endSelection, UnderlineSpan.class);
                for (int i = 0; i < ulSpan.length; i++) {
                    str.removeSpan(ulSpan[i]);
                }

                text.setText(str);
                b.setChecked(false);
                i.setChecked(false);
                u.setChecked(false);
                text.setSelection(endSelection);

Answer 3

有一个非常简单的解决方案：

将Spannable对象设置为TextView时，您使用myTextView.setText(spannable);会添加分配给spannable的自定义格式。

要一次清除TextView中的所有跨度，请使用：myTextView.setText(spannable.toString());

示例

Spannable spannable = new SpannableString(myTextView.getText().toString());

spannable.setSpan(new ForegroundColorSpan(Color.RED), 8, 13,
        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

spannable.setSpan(new BackgroundColorSpan(Color.YELLOW), 4, 30, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan(new BackgroundColorSpan(Color.BLUE), 10, 20, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan(new UnderlineSpan(), 7, 11, 0);
myTextView.setText(spannable); // add all the spannable format
myTextView.setText(spannable.toString()); // clear all the spannable format

Answer 4

这是我创建的一种小型实用程序方法，是对TextView的扩展，并在API 29中进行了测试：

fun TextView.removeAttributedProperties (forText: String? = null) {
  forText?.let {
    // check if the text we're highlighting is empty to abort
    if (forText.isEmpty()) {
        return
    }

    // compute the start and end indices from the text
    val startIdx = text.indexOf(forText)
    val endIdx = startIdx + forText.length

    // if the indices are out of bounds, abort as well
    if (startIdx < 0 || endIdx > text.length) {
        return
    }

    (text as? SpannedString)?.let { spannedString ->
        val spannable = spannedString.toSpannable()

        val spansToRemove = spannable.getSpans(startIdx, endIdx, CharacterStyle::class.java)
        for (span in spansToRemove) {
            spannable.removeSpan(span)
        }

        // update the text back
        text = spannable
    }
  } ?: run {
    // if we have no text, let's remove all attributed properties
    text = text.toString()
  }
}

Answer 5

简单，重新启动您的SpannableString。希望这可以节省您的时间。

Answer 6

以下适用于我（假设“text”是TextView或EditText）：

String str = text.getText().toString();
text.setText(str);

如何清除可跨文本的格式，包括最后一个字符？

6 个答案: