@Nullable
    public static String stripHtml(@Nullable final String html) {
        return containsHtml(html) ? trimSpanned(HtmlCompat.fromHtml(html, HtmlCompat.FROM_HTML_MODE_LEGACY)).toString() : html;
    }
Convert a potentially HTML string into a plain-text one. If the string does not contain HTML markup,
it is returned unchanged.

@param html a string containing either HTML or plain text
@return a string without any HTML markup
main/src/main/java/cgeo/geocaching/utils/TextUtils.java