我试图做计算两个日期之间的天如下：

在获取当前日期 在获取过去或将来的日期 计算无之间的差异。 1，没有。 2 present日期按以下格式 如果结果是在过去的（2小时前）或将来（2天） 格式：日，周，月，年

我尝试不同的方法，但不能得到我想要上面的结果。我发现的是安卓的的DatePicker 的对话框转换日期为整数。我还没有找到一种方法，使DatePicket小部件返回，而不是整数日期变量。

 私人DatePickerDialog.OnDateSetListener mDateSetListener =
        新DatePickerDialog.OnDateSetListener（）{

            公共无效onDateSet（DatePicker的观点，** INT **年，
                                  ** INT ** monthOfYear，** INT ** DAYOFMONTH）{
                enteredYear =年;
                enteredMonth = monthOfYear;
                enteredDay = DAYOFMONTH;
            }
        };
 

我试图将系统日期整数，基于上述转换，但试图计算两个日期之间的日子，这并没有真正的工作。

 私人无效getSystemDate（）{
     最后的日历C = Calendar.getInstance（）;

        mYear = c.get（Calendar.YEAR）;
        systemYear = mYear;

        mMonth = c.get（Calendar.MONTH）;
        systemMonth = mMonth + 1;

        MDAY = c.get（Calendar.DAY_OF_MONTH）;
        systemDay = MDAY;

}
 

解决方案

  / **
  *返回描述的天数的字符串
  * dateOne和dateTwo之间。
  *
  * /

公共字符串getDateDiffString（日期dateOne，日期dateTwo）
{
    长timeOne = dateOne.getTime（）;
    长timeTwo = dateTwo.getTime（）;
    长。一天= 1000 * 60 * 60 * 24;
    长三角洲=（timeTwo  -  timeOne）/。一天;

    如果（增量大于0）{
        返回dateTwo是+增量dateOne天后+;
    }
    其他 {
        增量* = -1;
        返回dateTwo是+增量dateOne前几天+;
    }
}
 

编辑：刚才看到在另一个线程同样的问题： how计算使用Java 两个日期之间的差异

EDIT2：为了获得年/月/周，做这样的事情：

  INT年=增量/ 365;
INT休息=三角洲％365;
INT月=休息/ 30;
休息休息= 30％;
诠释周=休息/ 7;
INT天=其余的7％;
 

I am trying to do calculate days between 2 dates as follow:

Obtain current date Obtain past OR future date Calculate the difference between no. 1 and no. 2 Present the dates in the following format If the result is in past (2 day ago) or in the future (in 2 days) Format will: days, weeks, months, years

I tried different ways but couldn't get the result I wanted above. I found out that Android DatePicker dialog box convert date into Integer. I have not found a way to make DatePicket widget to return date variables instead of integer.

private DatePickerDialog.OnDateSetListener mDateSetListener =
        new DatePickerDialog.OnDateSetListener() {

            public void onDateSet(DatePicker view, **int** year, 
                                  **int** monthOfYear, **int** dayOfMonth) {
                enteredYear = year;
                enteredMonth = monthOfYear;
                enteredDay = dayOfMonth;
            }
        };

I tried to convert the system date to Integer, based on the above, but this doesn't really work when trying to calculate days between 2 dates.

private void getSystemDate(){
     final Calendar c = Calendar.getInstance();

        mYear = c.get(Calendar.YEAR);
        systemYear = mYear;

        mMonth = c.get(Calendar.MONTH);
        systemMonth = mMonth + 1;

        mDay = c.get(Calendar.DAY_OF_MONTH);
        systemDay = mDay;

}

解决方案

/** 
  *  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";
    }
}

Edit: Just saw the same question in another thread: how to calculate difference between two dates using java

Edit2: To get Year/Month/Week, do something like this:

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