public static String timeConvert(int time) {
        int min = time / 60;
        int sec = time % 60;
        if(min < 10){
            if(sec < 10)
                return "0" + min + ":0" + sec;
            return "0" + min + ":" + sec;
        }
        if(sec == 0)
            return "" + min + ":00";
        if(sec < 10)
            return "" + min + ":0" + sec;
        return "" + min + ":" + sec;
    }