上周：2017/05 / 8-2017 / 05/14

装载周：2017/05 / 15-2017 / 05/21

下周：2017/05 / 22-2017 / 05/28

醇>

代码加载Mon-Sun的中间日期。当我点击下一个按钮时，它会带我到下一周的下一组天。当我从这里点击Previous时，它会跳过初始加载的周并跳转到下周的日期。当我使用Previous to Next进行另一种方式时也会发生同样的情况。当我继续按下下一个和上一个按钮时，他们不会继续加载新周。

我做错了什么？

初始加载代码：

DateFormat format = new SimpleDateFormat("M-dd");

Calendar calendar = Calendar.getInstance();

calendar.setFirstDayOfWeek(Calendar.MONDAY);

calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);

calendar.add(Calendar.DAY_OF_MONTH, 7);

days = new String[7];

for (int i = 0; i < 7; i++)

{

days[i] = format.format(calendar.getTime());

calendar.add(Calendar.DAY_OF_MONTH, 1);

}

下周代码：

DateFormat format = new SimpleDateFormat("M-dd");

Calendar calendar = Calendar.getInstance();

calendar.setFirstDayOfWeek(Calendar.MONDAY);

calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);

calendar.add(Calendar.DAY_OF_MONTH, -7);

days = new String[7];

for (int i = 0; i < 7; i++)

{

days[i] = format.format(calendar.getTime());

calendar.add(Calendar.DAY_OF_MONTH, 1);

}

上周代码：

Calendar calendar; // Stick this at the start of your code

解决方案：

DateFormat format = new SimpleDateFormat("M-dd");

calendar = Calendar.getInstance();

calendar.setFirstDayOfWeek(Calendar.MONDAY);

calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);

days = new String[7];

for (int i = 0; i < 7; i++)

{

days[i] = format.format(calendar.getTime());

calendar.add(Calendar.DAY_OF_MONTH, 1);

}

初始加载代码：

DateFormat format = new SimpleDateFormat("M-dd");

calendar.setFirstDayOfWeek(Calendar.MONDAY);

calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);

calendar.add(Calendar.DAY_OF_MONTH, 7);

days = new String[7];

for (int i = 0; i < 7; i++)

{

days[i] = format.format(calendar.getTime());

calendar.add(Calendar.DAY_OF_MONTH, 1);

}

下周代码：

DateFormat format = new SimpleDateFormat("M-dd");

calendar.setFirstDayOfWeek(Calendar.MONDAY);

calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);

calendar.add(Calendar.DAY_OF_MONTH, -7);

days = new String[7];

for (int i = 0; i < 7; i++)

{

days[i] = format.format(calendar.getTime());

calendar.add(Calendar.DAY_OF_MONTH, 1);

}

上周代码：

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