安卓中的错误"week of year"

Question

从Date返回的"年份中的第几周"错误。

这是我的代码:

Calendar c = Calendar.getInstance();
c.setTime(my_date);
int num_week = c.get(Calendar.WEEK_OF_YEAR);

如果my_date (type Date)是01/01/2011，我假设"一年中的星期"是1。但它返回52。

我试着用这些方法测试，但我没有得到任何东西:

c.setFirstDayOfWeek(6);
c.setMinimalDaysInFirstWeek(1)

有趣的是，我来自西班牙，我们的一周从星期一开始。

我要做什么才能得到正确的结果吗?

谢谢!

Answer 1

这可能是Android/harmony特有的。例如，这对我的桌面Java有效:

import java.util.*;
public class Test {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(2011, 0, 1, 0, 0, 0);
        System.out.println(calendar.get(Calendar.WEEK_OF_YEAR)); // Prints 52
        calendar.setMinimalDaysInFirstWeek(1);
        System.out.println(calendar.get(Calendar.WEEK_OF_YEAR)); // Prints 1
    }
}

你能确认完全相同的代码(模记录选项)在Android上记录52两次吗?

Answer 2

在这里您可以查看oracle的引用

https://docs.oracle.com/javase/7/docs/api/java/util/GregorianCalendar.html

并且我已经放置了一个快速解决方案来查找当前的周数。您可以按照自己的方式进行更改和优化。也可以根据您方便的GMT值设置

public static int getWeeksOfMonth() {
    DATESTATUS = false;
    VALUESTATUS = false;
    int weekCount;
    WEEK_OF_MONTH= -1;
    // get the supported ids for GMT+04:00 (Pacific Standard Time)
    String[] ids = getAvailableIDs(4 * 60 * 60 * 1000);
    // if no ids were returned, something is wrong. get out.
    if (ids.length == 0)
        return WEEK_OF_MONTH;
    // create a Pacific Standard Time time zone
    SimpleTimeZone pdt = new SimpleTimeZone(4 * 60 * 60 * 1000, ids[0]);
    // create a GregorianCalendar with the Pacific Daylight time zone
    // and the current date and time
    Calendar calendar = new GregorianCalendar(pdt);
    Date trialTime = new Date();
    calendar.setTime(trialTime);
    weekCount = calendar.get(Calendar.WEEK_OF_YEAR);
    return recursiveWeekCountCheck(calendar, weekCount);
}
private static int recursiveWeekCountCheck(Calendar calendar, int weekCount) {
    if (calendar.get(Calendar.MONTH) == Calendar.DECEMBER && weekCount == 1) {
        DATESTATUS = true;
        calendar.add(Calendar.DAY_OF_MONTH, -1);
        weekCount = calendar.get(Calendar.WEEK_OF_YEAR);
        recursiveWeekCountCheck(calendar, weekCount);
    }
    if (!VALUESTATUS){
        VALUESTATUS = true;
        if (DATESTATUS) {
            weekCount++;
            WEEK_OF_MONTH = weekCount;
        } else {
            WEEK_OF_MONTH = weekCount;
        }
    }
    return WEEK_OF_MONTH;
}

最后调用getWeeksOfMonth()方法;