java关键字标红处理

有时我们在界面上输出一段文字，文字中的关键字需要用红色处理，怎么办呢？下面就是方法：

public static SpannableStringBuilder setKeywordRed(String keyword, String strtext) {String docInfo = strtext;int keywordIndex = strtext.indexOf(keyword);SpannableStringBuilder style = new SpannableStringBuilder(docInfo);if(keyword==null||keyword==""){return style;}while (keywordIndex != -1) {style.setSpan(new ForegroundColorSpan(Color.RED), keywordIndex,keywordIndex + keyword.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);int tempkeywordTempIndex = keywordIndex + keyword.length();strtext = docInfo.substring(tempkeywordTempIndex, docInfo.length());keywordIndex = strtext.indexOf(keyword);if (keywordIndex != -1) {keywordIndex = keywordIndex + tempkeywordTempIndex;}}return style;}