Convert Milliseconds (ms) into Time Formatted String (HH:MM:SS) in Java\Android

public String msToTime(long ms)
    {
        long mm = 0;
        long ss = 0;
        long hh = 0;

        ss = ms/1000;
        mm = ss/60;
        ss = ss%60;
        hh = mm/60;
        mm = mm%60;

        String ssString = String.valueOf(ss);
        String mmString = String.valueOf(mm);
        String hhString = String.valueOf(hh);


        if (mmString.length() == 1)
        {
            mmString = "0"+mmString;
        }
        if (ssString.length() == 1)
        {
            ssString = "0"+ssString;
        }
        if (hhString.length() == 1)
        {
            hhString = "0"+hhString;
        }

        String time = null;

        if (hh!=0)
        {
            time = hhString+":"+mmString+":"+ssString;
        }
        else {
            time = mmString+":"+ssString;
        }



        return time;
    }