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

 private boolean getAge(int year, int month, int day) {
    try {
        Calendar dob = Calendar.getInstance();
        Calendar today = Calendar.getInstance();
        dob.set(year, month, day);
        int monthToday = today.get(Calendar.MONTH) + 1;
        int monthDOB = dob.get(Calendar.MONTH)+1;
        int age = today.get(Calendar.YEAR) - dob.get(Calendar.YEAR);
        if (age > 18) {
            return true;
        } else if (age == 18) {
            if (monthDOB > monthToday) {
                return true;
            } else if (monthDOB == monthToday) {
                int todayDate = today.get(Calendar.DAY_OF_MONTH);
                int dobDate = dob.get(Calendar.DAY_OF_MONTH);
                if (dobDate <= todayDate) { // should be less then
                    return true;
                } else {
                    return false;
                }
            } else {
                return false;
            }
        } else {
            return false;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return false;
}