title: How to get a difference year, month, day between two dates in android App
body: <p>I am developing an android App.</p>
  
  <p>I would like to know how to calculate exact number of "years, months and days" between two dates.</p>
  
  <p>e.g.
  1. "2014.1.3" to "2015.1.4"
          →Answer: "1 year and 1 day"</p>
  
  <ol start="2">
  <li>"2013.1.3" to "2014.4.2"
      →Answer: "1 year and 2 months and 30 days"</li>
  </ol>
  
  <p>I think iPhone app has this class "NSDateComponent(NSYearCalendarUnit,NSMonthCalendarUnit,NSDayCalendarUnit)", but it seems not for the Android.</p>
  
  <p>Is there any effective way in android?</p>