EditText上的setSpan()删除其他范围 [英] setSpan() on EditText deletes other spans

问题描述

我有一个bold按钮，当按下该按钮时，该按钮应该用于更改EditText field中所选文本的字体.除了一个例外，所有这些都可以完美运行.如果在EditText的其他地方有bold字体，并且我尝试创建一个新的bold部分，则将原始部分更改回normal.例如，以下字符串:

I have a bold button that, when pressed, is supposed to change the typeface of the selected text in the EditText field. This all works perfectly, with one exception. If there is bold typeface elsewhere in the EditText, and I try to create a new bold section, the original section is changed back to normal. For example, this string:

粗体，而不是粗体.

如果我突出显示任何普通单词并按下按钮，它们的确会变成bold，但是第一个单词会变成normal.我在代码中看不到任何原因.

If I highlight any of the normal words and press the button, they do become bold, but the first word becomes normal. I can't see any reason for this in my code.

谢谢！

final StyleSpan normalStyle = new StyleSpan(Typeface.NORMAL);
final StyleSpan boldStyle = new StyleSpan(Typeface.BOLD);
boldButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int startSelection = field.getSelectionStart();
                int endSelection = field.getSelectionEnd();
                Editable editableText = field.getText();

                StyleSpan[] selectedSpans = editableText.getSpans(startSelection, endSelection, StyleSpan.class);
                boolean isAlreadyBold = false;
                for (StyleSpan style : selectedSpans) {
                    print("The style is " + style.getStyle());
                    if (style.getStyle() == Typeface.BOLD) {
                        int styleStart = editableText.getSpanStart(style);
                        int styleEnd = editableText.getSpanEnd(style);
                        if (styleStart == startSelection && styleEnd == endSelection) {
                            editableText.removeSpan(style);
                            editableText.setSpan(normalStyle, startSelection, endSelection, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
                            isAlreadyBold = true;
                            print("Spans are equal");
                        } else if (styleStart < startSelection && styleEnd > endSelection) {
                            editableText.removeSpan(style);
                            editableText.setSpan(boldStyle, styleStart, startSelection, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                            editableText.setSpan(boldStyle, endSelection, styleEnd, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                            editableText.setSpan(normalStyle, startSelection, endSelection, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
                            isAlreadyBold = true;
                            print("Style is larger than selection");
                        } else if (styleStart < startSelection && styleEnd >= startSelection) {
                            editableText.removeSpan(style);
                            editableText.setSpan(boldStyle, styleStart, startSelection, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                            editableText.setSpan(normalStyle, startSelection, endSelection, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
                            isAlreadyBold = true;
                            print("Style begins before selection");
                        } else if (endSelection < styleEnd && endSelection >= styleStart) {
                            editableText.removeSpan(style);
                            editableText.setSpan(boldStyle, endSelection, styleEnd, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                            editableText.setSpan(normalStyle, startSelection, endSelection, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
                            isAlreadyBold = true;
                            print("Style ends after selection");
                        }
                    }
                }
                if (!isAlreadyBold) {
                    editableText.setSpan(boldStyle, startSelection, endSelection, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
                }
            }
        });

注意: -print是我添加的实用程序日志

Note: - print is a utility log that I added

推荐答案

我在代码中看不到任何原因.

I can't see any reason for this in my code.

为每个跨区域创建一个新的StyleSpan.请勿重用已经使用的StyleSpan实例.

Create a new StyleSpan for each spanned area. Do not reuse StyleSpan instances that are already in use.

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