public static boolean IsToday(String day) throws ParseException {
    // 當前的時刻
    Calendar pre = Calendar.getInstance();
    Date predate = new Date(System.currentTimeMillis());
    pre.setTime(predate);

    // 設定的時刻
    Calendar cal = Calendar.getInstance();
    Date date = sdf.parse(day);
    cal.setTime(date);

    if (cal.get(Calendar.YEAR) == (pre.get(Calendar.YEAR))) {
        int diffDay = cal.get(Calendar.DAY_OF_YEAR) - pre.get(Calendar.DAY_OF_YEAR);
        int diffHour = cal.get(Calendar.HOUR_OF_DAY) - pre.get(Calendar.HOUR_OF_DAY);
        int diffMin = cal.get(Calendar.MINUTE) - pre.get(Calendar.MINUTE);
        if (diffDay == 0) {
            if (diffHour == 0) {
                if (diffMin >= 0) {
                    return true;
                }
            } else if (diffHour > 0) {
                return true;
            }
        } else if (diffDay > 0) {
            return true;
        }
    } else if (cal.get(Calendar.YEAR) > (pre.get(Calendar.YEAR))) {
        return true;
    }
    return false;
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
cur_time.setText(sdf.format(new Date()));// 開會時間