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

static int calculateAge(int birthdayDay, int birthdayMonth, int birthdayYear)
{
    DateTime date = DateTime(birthdayYear, birthdayMonth, birthdayDay).toLocal();
    DateTime now = DateTime.now().toLocal();

    return now.difference(date).inDays ~/ 365.2425;
}