title: How to run CountDownTimer from positive to negative values?
body: <p>I want to display a total delay time of the vehicle, So I have to run a timer from positive to the negative direction. Here Positive time is the deadline which will be inserted at the beginning &amp; as the timer goes in negative mode, It will represent the delay of a vehicle. Just suppose Timer starts from 12:00:00 and it will reach to 05:00:00 after 7 hours and -03:00:00 after 8 hours and so on. It's a continuous timer decreasing second by second. So can I do this with <a href="http://developer.android.com/reference/android/os/CountDownTimer.html" rel="nofollow noreferrer">CountDownTimer</a> or anything else? </p>
  
  <p>I have already tried <a href="https://github.com/jgilfelt/android-countdown" rel="nofollow noreferrer">jgilfelt/android-countdown</a> but it does not calculate negative time.</p>