title: Android get difference in milliseconds between two dates
body: <p>I have Integer fields:</p>
  
  <p>currentYear,currentMonth,currentDay,currentHour,currentMinute and nextYear,nextMonth,nextDay,nextHour,nextMinute.</p>
  
  <p>How I can get difference between those two spots in time in milliseconds.
  I found a way using Date() object, but those functions seems to be depricated, so it's little risky.</p>
  
  <p>Any other way?</p>