所以，我终于想出了自己。

public class MyHtmlTagHandler implements TagHandler {

public void handleTag(boolean opening, String tag, Editable output,

XMLReader xmlReader) {

if(tag.equalsIgnoreCase("strike") || tag.equals("s")) {

processStrike(opening, output);

}

}

private void processStrike(boolean opening, Editable output) {

int len = output.length();

if(opening) {

output.setSpan(new StrikethroughSpan(), len, len, Spannable.SPAN_MARK_MARK);

} else {

Object obj = getLast(output, StrikethroughSpan.class);

int where = output.getSpanStart(obj);

output.removeSpan(obj);

if (where != len) {

output.setSpan(new StrikethroughSpan(), where, len, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

}

}

}

private Object getLast(Editable text, Class kind) {

Object[] objs = text.getSpans(0, text.length(), kind);

if (objs.length == 0) {

return null;

} else {

for(int i = objs.length;i>0;i--) {

if(text.getSpanFlags(objs[i-1]) == Spannable.SPAN_MARK_MARK) {

return objs[i-1];

}

}

return null;

}

}

}

如果有人需要它。

干杯