（Java / Android）计算2个日期之间的天数，并以特定格式显示结果

/*
* Returns a string that describes the number of days
* between dateOne and dateTwo.
*

/

public String getDateDiffString(Date dateOne, Date dateTwo){    long timeOne = dateOne.getTime();    long timeTwo = dateTwo.getTime();    long oneDay = 1000 * 60 * 60 * 24;    long delta = (timeTwo - timeOne) / oneDay;    if (delta > 0) {        return "dateTwo is " + delta + " days after dateOne";    }    else {        delta *= -1;        return "dateTwo is " + delta + " days before dateOne";    }}

编辑：刚刚在另一个线程中看到了相同的问题：
如何使用Java计算两个日期之间的差异

Edit2：要获取年/月/周，请执行以下操作：

int year = delta / 365;int rest = delta % 365;int month = rest / 30;rest = rest % 30;int weeks = rest / 7;int days = rest % 7;