我如何才能找到多年从事android的两个日期之间有多少？ [英] How can I find the number of years between two dates in android?

问题描述

我试图从特定日期确定年龄多年。有谁知道一个干净的方式来做到这一点在Android中？我有Java的API可很明显，但在直线上升Java API是pretty的软弱，我希望Android有一些东西来帮助我。

编辑：多项建议使用乔达时间的Andr​​oid让我担心了一下，由于 Android的Java的 - 乔达日期缓慢和有关的问题。此外，拉动不附带平台库的东西，这个规模可能是矫枉过正。

解决方案

 公共静态INT getDiffYears（日期第一，最后的日期）{
    日历一= getCalendar（第一）;
    日历B = getCalendar（最后一个）;
    INT差异= b.get（YEAR） -  a.get（年）;
    如果（a.get（月）GT; b.get（月）||
        （a.get（月）== b.get（月）及和放大器; a.get（DATE）＆GT; b.get（DATE）））{
        diff--;
    }
    返回差异;
}

公共静态日历getCalendar（日期日期）{
    日历CAL = Calendar.getInstance（Locale.US）;
    cal.setTime（日期）;
    返回CAL;
}
 

I am trying to determine an age in years from a certain date. Does anyone know a clean way to do this in Android? I have the Java api available obviously, but the straight-up java api is pretty weak, and I was hoping that Android has something to help me out.

EDIT: The multiple recommendations to use Joda time in Android worries me a bit due to Android Java - Joda Date is slow and related concerns. Also, pulling in a library not shipped with the platform for something this size is probably overkill.

解决方案

public static int getDiffYears(Date first, Date last) {
    Calendar a = getCalendar(first);
    Calendar b = getCalendar(last);
    int diff = b.get(YEAR) - a.get(YEAR);
    if (a.get(MONTH) > b.get(MONTH) || 
        (a.get(MONTH) == b.get(MONTH) && a.get(DATE) > b.get(DATE))) {
        diff--;
    }
    return diff;
}

public static Calendar getCalendar(Date date) {
    Calendar cal = Calendar.getInstance(Locale.US);
    cal.setTime(date);
    return cal;
}

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