android - EditText 上的 setSpan() 删除其他跨度

Question

我有一个 bold 按钮，当按下该按钮时，应该会更改 EditText 字段 中所选文本的字体。这一切都完美无缺，只有一个异常(exception)。如果 EditText 中的其他地方有 bold 字体，我尝试创建一个新的 bold 部分，原来的部分被改回 正常。例如，这个字符串:

粗体 不粗体更粗体。

如果我突出显示任何普通单词并按下按钮，它们会变成粗体，但第一个单词会变成普通。我在我的代码中看不到任何原因。

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

Answer 1

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

为每个跨接区域创建一个新的 StyleSpan。不要重复使用已在使用中的 StyleSpan 实例。