在TextView中显示定时器包含天，小时，分钟和秒的android

我使用的倒数计时器，以显示文本view.It工作正常左边的时间。
下面是code： - \\

I am using countdown timer to show the left time in text view.It is working fine. Below is the code:-\

    public class MyCount extends CountDownTimer {
    Context mContext;

    public MyCount(long millisInFuture, long countDownInterval) {
        super(millisInFuture, countDownInterval);

    }


    public void onTick (long millisUntilFinished) {

        MainActivity.timeDisplay.setText(formatTime(millisUntilFinished));


    }

    public void onFinish() {
        AutomaticCallRecorderStaticMethod.startRecording();

    }
}


    public String formatTime(long millis) {
    output = "";
    long seconds = millis / 1000;
    long minutes = seconds / 60;
    long hours=minutes/ 60;

    seconds = seconds % 60;
    minutes = minutes % 60;
    hours=hours%60;

    String secondsD = String.valueOf(seconds);
    String minutesD = String.valueOf(minutes);
    String hoursD=String.valueOf(hours);


    if (seconds < 10)
        secondsD = "0" + seconds;
    if (minutes < 10)
        minutesD = "0" + minutes;

    if (hours < 10)
        hoursD = "0" + hours;

    output = hoursD+" : "+minutesD + " : " + secondsD;
    return output;
}

code启动定时器： -

Code to start the timer:-

counter = new MyCount (length, 10);

一切工作正常。这表明像为00:00:00在文本视图定时器
和最大极限为59:59:59。这意味着只有60个小时。现在我想的限制应该增加，如果用户选择3天，然后定时器应71:59:59或者类似的东西开始，这样倒计时的结束（）方法应该经过3 days.How叫我能去做？？
除了它，我想也显示在下面的格式天数： -

Everything is working fine. It shows the timer in text view like as 00:00:00 and the maximum limit is 59:59:59. It means only 60 hours. Now I want that the limit should be increased if the user select 3 days then the timer should start from 71:59:59 or something like that so that the finish() method of countdown timer should be called after 3 days.How can I do that?? Beside it I want to show number of days also in the below format:-

天：小时：分钟：秒左

如何才能实现that.Please帮我理清这个问题。

How can I achieve that.Please help me to sort out this problem.