How to find difference two dates on android app [duplicate]

Question

Possible Duplicate:
Calculate date/time difference in java

I am a new on Android and I want to make a new app for me. I want to subtruct two dates (dd/mm/yyyy) format by using currentDate. For example I want to find the differences of the days between 01/02/2013 and currentDate. How can I do it?

Answer 1

SimpleDateFormat dfDate  = new SimpleDateFormat("dd/MM/yyyy");
    java.util.Date d = null;
    java.util.Date d1 = null;
    Calendar cal = Calendar.getInstance();
    try {
            d = dfDate.parse("01/02/2012 ");
            d1 = dfDate.parse(dfDate.format(cal.getTime()));//Returns 15/10/2012
        } catch (java.text.ParseException e) {
            e.printStackTrace();
        }

    int diffInDays = (int) ((d.getTime() - d1.getTime())/ (1000 * 60 * 60 * 24));
    System.out.println(diffInDays);

Check Ex1 and Ex2 for more detailed example

Answer 2

You may take a look into DateUtils, that offers some utility methods to compute elapsed time between two dates, but only for representation. Do not use the direct approach to convert between days/milliseconds since it does not take into consideration leap years, leap seconds, summer/winter time changes, etc. Those considerations are handled by Calendar classes.

Update You can use Joda library to perform relative date and time calculations like the one you need.