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 int getAge(String dobString){

    Date date = null;
    SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
    try {
        date = sdf.parse(dobString);
    } catch (ParseException e) {
        e.printStackTrace();
    }

    if(date == null) return 0;

    Calendar dob = Calendar.getInstance();
    Calendar today = Calendar.getInstance();

    dob.setTime(date);

    int year = dob.get(Calendar.YEAR);
    int month = dob.get(Calendar.MONTH);
    int day = dob.get(Calendar.DAY_OF_MONTH);

    dob.set(year, month+1, day);

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

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



    return age;
}