当start与end相等时Spannable.setSpan
通过EditText+Spannable实现字体加粗和取消字体加粗
如下代码:
Spannable spn = mEditText.getText();
int start = mEditText.getSelectionStart();
int end = mEditText.getSelectionEnd();
StyleSpan styleSpans[] = spn.getSpans(start, end, StyleSpan.class);
for (StyleSpan styleSpan : styleSpans) {
if (styleSpan.getStyle() == Typeface.BOLD) {
mIsBold = true;
break;
}
if (styleSpan.getStyle() == Typeface.NORMAL) {
mIsBold = false;
break;
}
}
for (StyleSpan styleSpan : styleSpans) {
if (styleSpan.getStyle() == Typeface.BOLD || styleSpan.getStyle() == Typeface.NORMAL) {
spn.removeSpan(styleSpan);
}
}
int typeface;
if (mIsBold) {
typeface = Typeface.NORMAL;
} else {
typeface = Typeface.BOLD;
}
spn.setSpan(new StyleSpan(typeface), start, end, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
有选中项时(即start不等于end)效果正常。
当没有选中项时,start与end是相等的,第一次设置加粗没有问题,可是当我取消加粗时,光标前面的已经加粗的都取消了。怀疑与Spannable.SPAN_INCLUSIVE_INCLUSIVE相关,但是,当start与end相等时,只有设置这个才生效。不知道怎么解决