标签和移动设备中的日期差异

Question

我试图找回当月的当前一周

    TimeZone timezone = TimeZone.getDefault();
    Calendar c = new GregorianCalendar(TimeZone.getTimeZone("GMT"));
    c.set(year, month, day);
    // Set the calendar to monday of the current week
    c.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
    c.add(Calendar.DATE, num * 7);
    // Print dates of the current week starting on Monday
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
    String[] days = new String[7];
    for (int i = 0; i < 7; i++) {
        days[i] = df.format(c.getTime());
        c.add(Calendar.DAY_OF_MONTH, 1);
    }
    return days;

其中yr mnth和day将作为函数的参数传递...而num值将为laways-1。它在手机中返回正确的值。但在标签中我得到了前一周。两个设备的操作系统以及日期和时区相同。

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