How to create method for age calculation method in android

Question

I want to write a method to calculate the age from the birth date, is the logic correct and how to write it in android Java:

public int calculateAge(String b         


        

Answer 1

Here is my solution to the problem:

/**
 * Method to extract the user's age from the entered Date of Birth.
 * 
 * @param DoB String The user's date of birth.
 * 
 * @return ageS String The user's age in years based on the supplied DoB.
 */
private String getAge(int year, int month, int day){
    Calendar dob = Calendar.getInstance();
    Calendar today = Calendar.getInstance();

    dob.set(year, month, 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--; 
    }

    Integer ageInt = new Integer(age);
    String ageS = ageInt.toString();

    return ageS;  
}

I used a DatePicker to get the input values required here. This method, together with the date picker, is specifically to get the user's DoB and calculate their age. A slight modification can be made to allow for String input(s) of the user's DoB, depending upon your specific implementation. The return type of String is for updating a TextView, a slight mod can be made to allow for type int output also.