Calculate age from BirthDate

Question

I have DatePicker Dialog, When I select date at that time I want to calculate age it\'s working but when I select date of current year at that time it showing the -1 age instead

Answer 1

This is the shortest I could get it to.

static int calculateAge(Calendar birthDay){
       Calendar today = Calendar.getInstance();

       int age = today.get(Calendar.YEAR) - birthDay.get(Calendar.YEAR);

       if (birthDay.get(Calendar.DAY_OF_YEAR) < today.get(Calendar.DAY_OF_YEAR)) {
                age--;
        }
       return age;
}