BirthDateから年齢を計算する
DatePickerダイアログがあり、その時点で日付を選択すると機能しますが、現在の年の日付を選択すると0ではなく-1の年齢が表示されますが、これを解決するにはどうすればよいですか？解決してください。私のコードは以下の通りです：
public int getAge(int year, int month, int day) {
GregorianCalendar cal = new GregorianCalendar();
int y, m, d, noofyears;
y = cal.get(Calendar.YEAR);// current year ,
m = cal.get(Calendar.MONTH);// current month
d = cal.get(Calendar.DAY_OF_MONTH);// current day
cal.set(year, month, day);// here ur date
noofyears = (int) (y - cal.get(Calendar.YEAR));
LOGD("Age......", String.valueOf(noofyears));
if ((m < cal.get(Calendar.MONTH)) || ((m == cal.get(Calendar.MONTH)) && (d < cal.get(Calendar.DAY_OF_MONTH)))) {
--noofyears;
}
LOGD("Age......", String.valueOf(noofyears));
if (noofyears != 0) {
ageCount = noofyears;
} else {
ageCount = 0;
}
if (noofyears < 0)
throw new IllegalArgumentException("age < 0");
return noofyears;
}
ここに、getAgeと呼ばれるJavaメソッドがあります。このメソッドは、年月日を整数として、年単位の年齢を表す整数を保持するString型を返します。
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;
}
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;
}
private void calculateAge() {
age.calcualteYear();
age.calcualteMonth();
age.calcualteDay();
age.calculateMonths();
age.calTotalWeeks();
age.calTotalHours();
age.calTotalMins();
age.calTotalSecs();
age.calTotalMilsecs();
// Toast.makeText(getContext(), "click the resulted button"+age.getResult() , Toast.LENGTH_SHORT).show();
result.setText("AGE (DD/MM/YY) :" + age.getResult());
}
その後、1つのクラスを作成します
public class AgeCalculation {
private int startYear;
private int startMonth;
private int startDay;
private int endYear;
private int endMonth;
private int endDay;
private int resYear;
private int resMonth;
private int resDay;
private Calendar start;
private Calendar end;
public String getCurrentDate()
{
end=Calendar.getInstance();
endYear=end.get(Calendar.YEAR);
endMonth=end.get(Calendar.MONTH);
endMonth++;
endDay=end.get(Calendar.DAY_OF_MONTH);
return endDay+":"+endMonth+":"+endYear;
}
public void setDateOfBirth(int sYear, int sMonth, int sDay)
{
startYear=sYear;
startMonth=sMonth;
startDay=sDay;
}
public void calcualteYear()
{
resYear=endYear-startYear/(365);
}
public void calcualteMonth()
{
if(endMonth>=startMonth)
{
resMonth= endMonth-startMonth;
}
else
{
resMonth=endMonth-startMonth;
resMonth=12+resMonth;
resYear--;
}
}
public void calcualteDay()
{
if(endDay>=startDay)
{
resDay= endDay-startDay;
}
else
{
resDay=endDay-startDay;
resDay=30+resDay;
if(resMonth==0)
{
resMonth=11;
resYear--;
}
else
{
resMonth--;
}
}
}
public String getResult()
{
return resDay+":"+resMonth+":"+resYear;
}
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;
}
以下は、Dateオブジェクトに対応する年齢を返すDateクラスのKotlin拡張です。
val Date.age: Int
get() {
val calendar = Calendar.getInstance()
calendar.time = Date(time - Date().time)
return 1970 - (calendar.get(Calendar.YEAR) + 1)
}
すべてのAndroidバージョンに対応しています。「1970」とは何かを疑問に思うなら、それはUnixエポックです。1970年1月1日のタイムスタンプは0です。
public static String calculateAge(String strDate) {
int years = 0;
int months = 0;
int days = 0;
try {
long timeInMillis = Long.parseLong(strDate);
Date birthDate = new Date(timeInMillis);
//create calendar object for birth day
Calendar birthDay = Calendar.getInstance();
birthDay.setTimeInMillis(birthDate.getTime());
//create calendar object for current day
long currentTime = System.currentTimeMillis();
Calendar now = Calendar.getInstance();
now.setTimeInMillis(currentTime);
//Get difference between years
years = now.get(Calendar.YEAR) - birthDay.get(Calendar.YEAR);
int currMonth = now.get(Calendar.MONTH) + 1;
int birthMonth = birthDay.get(Calendar.MONTH) + 1;
//Get difference between months
months = currMonth - birthMonth;
//if month difference is in negative then reduce years by one and calculate the number of months.
if (months < 0) {
years--;
months = 12 - birthMonth + currMonth;
if (now.get(Calendar.DATE) < birthDay.get(Calendar.DATE))
months--;
} else if (months == 0 && now.get(Calendar.DATE) < birthDay.get(Calendar.DATE)) {
years--;
months = 11;
}
//Calculate the days
if (now.get(Calendar.DATE) > birthDay.get(Calendar.DATE))
days = now.get(Calendar.DATE) - birthDay.get(Calendar.DATE);
else if (now.get(Calendar.DATE) < birthDay.get(Calendar.DATE)) {
int today = now.get(Calendar.DAY_OF_MONTH);
now.add(Calendar.MONTH, -1);
days = now.getActualMaximum(Calendar.DAY_OF_MONTH) - birthDay.get(Calendar.DAY_OF_MONTH) + today;
} else {
days = 0;
if (months == 12) {
years++;
months = 0;
}
}
//adarsh
if (currMonth > birthMonth) {
if (birthDay.get(Calendar.DATE) > now.get(Calendar.DATE)) {
months = months - 1;
}
}//---------------------------------
} catch (Exception e) {
e.printStackTrace();
}
//Create new Age object
return years + " Y " + months + " M " + days + " days";
}
public String getAge(int year, int month, int day) {
Calendar dob = Calendar.getInstance();
Calendar today = Calendar.getInstance();
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--;
}
Integer ageInt = new Integer(age);
String ageS = ageInt.toString();
return ageS;
}
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;
}
これが、ソースコードに実装する方法です。テストしました。それが有用であることを願っています：
public static int getAge(String dateTime, String currentFormat) {
SimpleDateFormat dateFormat = new SimpleDateFormat(currentFormat);
try {
Date date = dateFormat.parse(dateTime);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day = calendar.get(Calendar.DAY_OF_MONTH);
Date currentDate = new Date();
Calendar currentCalendar = Calendar.getInstance();
currentCalendar.setTime(currentDate);
int currentYear = currentCalendar.get(Calendar.YEAR);
int currentMonth = currentCalendar.get(Calendar.MONTH);
int currentDay = currentCalendar.get(Calendar.DAY_OF_MONTH);
int deltaYear = currentYear - year;
int deltaMonth = currentMonth - month;
int deltaDay = currentDay - day;
if (deltaYear > 0) {
if (deltaMonth < 0) {
deltaYear --;
} else if (deltaDay < 0){
deltaYear --;
}
return deltaYear;
}
} catch (Java.text.ParseException e) {
e.printStackTrace();
}
return 0;
}
public int getAge(int year, int month, int day) {
final Calendar birthDay = Calendar.getInstance();
birthDay.set(year, month, day);
final Calendar current = Calendar.getInstance();
if (current.getTimeInMillis() < birthDay.getTimeInMillis())
throw new IllegalArgumentException("age < 0");
int age = current.get(Calendar.YEAR) - birthDay.get(Calendar.YEAR);
if (birthDay.get(Calendar.MONTH) > current.get(Calendar.MONTH) ||
(birthDay.get(Calendar.MONTH) == current.get(Calendar.MONTH) &&
birthDay.get(Calendar.DATE) > current.get(Calendar.DATE)))
age--;
return age;
}
String getAgeInOther(int year, int month, int day) {
Calendar today = Calendar.getInstance();
Calendar birth = Calendar.getInstance();
birth.set(year, month, day);
Calendar temp = Calendar.getInstance();
temp.set(year, month, day);
int totalDays = 0;
int intMonth=0,intDays=0;
for (int iYear = birth.get(Calendar.YEAR); iYear <= today.get(Calendar.YEAR); iYear++) {
if (iYear == today.get(Calendar.YEAR) && iYear == birth.get(Calendar.YEAR)) {
for (int iMonth = birth.get(Calendar.MONTH); iMonth <= today.get(Calendar.MONTH); iMonth++) {
temp.set(iYear, iMonth, 1);
if ((iMonth == today.get(Calendar.MONTH)) && (iMonth == birth.get(Calendar.MONTH))) {
totalDays += today.get(Calendar.DAY_OF_MONTH) - birth.get(Calendar.DAY_OF_MONTH);
} else if ((iMonth != today.get(Calendar.MONTH)) && (iMonth != birth.get(Calendar.MONTH))) {
totalDays += temp.getActualMaximum(Calendar.DAY_OF_MONTH);
intMonth++;
}else if ((iMonth == birth.get(Calendar.MONTH))) {
totalDays +=( birth.getActualMaximum(Calendar.DAY_OF_MONTH)- birth.get(Calendar.DAY_OF_MONTH));
} else if ((iMonth == today.get(Calendar.MONTH))){
totalDays += today.get(Calendar.DAY_OF_MONTH);
if (birth.get(Calendar.DAY_OF_MONTH)<today.get(Calendar.DAY_OF_MONTH))
{
intMonth++;
intDays=today.get(Calendar.DAY_OF_MONTH)-birth.get(Calendar.DAY_OF_MONTH);
}else {
temp.set(today.get(Calendar.YEAR),today.get(Calendar.MONTH)-1,1);
intDays=temp.getActualMaximum(Calendar.DAY_OF_MONTH)-birth.get(Calendar.DAY_OF_MONTH)+today.get(Calendar.DAY_OF_MONTH);
}
}
}
} else if ((iYear != today.get(Calendar.YEAR)) && (iYear != birth.get(Calendar.YEAR))) {
for (int iMonth = 0; iMonth < 12; iMonth++) {
temp.set(iYear, iMonth, 1);
totalDays += temp.getActualMaximum(Calendar.DAY_OF_MONTH);
intMonth++;
}
} else if (((iYear) == birth.get(Calendar.YEAR))) {
for (int iMonth = birth.get(Calendar.MONTH); iMonth < 12; iMonth++) {
temp.set(iYear, iMonth, 1);
if ((iMonth == birth.get(Calendar.MONTH))) {
totalDays += (birth.getActualMaximum(Calendar.DAY_OF_MONTH)-birth.get(Calendar.DAY_OF_MONTH));
} else {
intMonth++;
totalDays += temp.getActualMaximum(Calendar.DAY_OF_MONTH);
}
}
} else if (iYear == today.get(Calendar.YEAR)) {
for (int iMonth = 0; iMonth <= today.get(Calendar.MONTH); iMonth++) {
temp.set(iYear, iMonth, 1);
if ((iMonth == today.get(Calendar.MONTH))) {
totalDays += today.get(Calendar.DAY_OF_MONTH);
if (birth.get(Calendar.DAY_OF_MONTH)<today.get(Calendar.DAY_OF_MONTH))
{
intMonth++;
intDays=today.get(Calendar.DAY_OF_MONTH)-birth.get(Calendar.DAY_OF_MONTH);
}else {
temp.set(today.get(Calendar.YEAR),today.get(Calendar.MONTH)-1,1);
intDays=temp.getActualMaximum(Calendar.DAY_OF_MONTH)-birth.get(Calendar.DAY_OF_MONTH)+today.get(Calendar.DAY_OF_MONTH);
}
} else {
intMonth++;
totalDays += temp.getActualMaximum(Calendar.DAY_OF_MONTH);
}
}
}
}
int ageYear=intMonth/12;
int ageMonth=intMonth%12;
int ageDays=intDays;
//TODO if you want age in YEAR:MONTH:DAY REMOVE COMMENTS
//TODO return ageYear+":"+ageMonth+":"+ageDays;
return ""+totalDays;//todo TOTAL AGE IN DAYS
}
kotlin言語の場合：
import Java.util.Calendar
fun main(args: Array<String>) {
print(getAge(yyyy,mm,dd))
}
fun getAge(year: Int, month: Int, day: Int): String {
val dob = Calendar.getInstance()
val today = Calendar.getInstance()
dob.set(year, month, day)
var age = today.get(Calendar.YEAR) - dob.get(Calendar.YEAR)
if (today.get(Calendar.DAY_OF_YEAR) < dob.get(Calendar.DAY_OF_YEAR)) {
age--
}
val ageInt = age + 1
return ageInt.toString()
}