如何在android中获取两个日期之间的年数[重复]

Question

您好，我正在创建一个 android 应用程序，其中我有两个不同日期的字符串现在我想获取这些日期之间的年数，请帮助我如何做到这一点？这是我的代码

                    String  birthday=p.getString("BirthDay");

                     Log.i("bd", String.valueOf(birthday));
                     Calendar c = Calendar.getInstance();


                     SimpleDateFormat df = new SimpleDateFormat("dd MMM, yyyy");
                     final String formattedDate = df.format(c.getTime());
                     Log.i("formattedDate", String.valueOf(formattedDate));

生日是保存日期，而格式化日期是当前日期，现在我想要这些之间的区别

Answer 1

请试试这个代码

    String birthday = p.getString("BirthDay");
    Calendar calendarBirthday = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat("dd MMM, yyyy");
    calendarBirthday.setTime(sdf.parse(birthday));
    Calendar calendarNow = Calendar.getInstance();
    int yearNow = calendarNow.get(Calendar.YEAR);
    int yearBirthday = calendarBirthday.get(Calendar.YEAR);
    int years = yearNow - yearBirthday;

Answer 2

int getYear(Date date1,Date date2){ 
  SimpleDateFormat simpleDateformat=new SimpleDateFormat("yyyy");
  Integer.parseInt(simpleDateformat.format(date1));

  return Integer.parseInt(simpleDateformat.format(date2))- Integer.parseInt(simpleDateformat.format(date1));

}

Answer 3

传递你的出生日期

public int getAge (int _year, int _month, int _day) {

    GregorianCalendar cal = new GregorianCalendar();
    int y, m, d, a;         

    y = cal.get(Calendar.YEAR);
    m = cal.get(Calendar.MONTH) + 1;
    d = cal.get(Calendar.DAY_OF_MONTH);
    cal.set(_year, _month, _day);
    a = y - cal.get(Calendar.YEAR);
    if ((m < cal.get(Calendar.MONTH))
                    || ((m == cal.get(Calendar.MONTH)) && (d < cal
                                    .get(Calendar.DAY_OF_MONTH)))) {
            --a;
    }
    if(a < 0)
            throw new IllegalArgumentException("Age < 0");
    return a;
}