检索所以@开始,空格结束的文字

/**
 * 检索所以@开始,空格结束的文字
 *
 * @param str
 * @return
 */
public static ArrayList checkStr(String str) {
    ArrayList mateStrs = new ArrayList<>();
    mateStrs.clear();
    Pattern pattern = Pattern.compile("\\@\\w+ ");
    Matcher matcher = pattern.matcher(str);
    while (matcher.find()) {
        String mateStr = matcher.group().trim();
        if (!TextUtils.isEmpty(mateStr) && mateStr.length() > 1) {
            mateStrs.add(mateStr.substring(1));
        }
    }
    return mateStrs;
}