获取自定义Calendar中的数据

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下面详细讲解了自定义日历控件中，如何获取日期数据。

    private void calculate() {        // 例如，今天是2015-08-27        List<Integer> dateList = new ArrayList<Integer>();        // calendar.getTime() : "Sat Aug 01 12:00:00 GMT-04:00 2015"        Calendar calendar = Calendar.getInstance();        // 设置完后，calendar = 2015/08/01        calendar.set(Calendar.DAY_OF_MONTH, 1);        // DAY_OF_WEEK：获得的是calendar在一周中的第几天，数值范围1~7，详细说明请参考本文后面。        // 获得的dayInWeek = 7        int dayInWeek = calendar.get(Calendar.DAY_OF_WEEK);        // 计算8月1号前面的空白数据        int nullDataRange = dayInWeek - 1;        for (int i = 0; i < nullDataRange; i++) {            dateList.add(0);        }        // 获取一个月的最大值，即 maxDay = 31        int maxDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);        for (int i = 1; i <= maxDay; i++) {            dateList.add(i);        }        // 获取到的List如下：        //[ 0,  0,  0,  0,  0,  0,  1,        //  2,  3,  4,  5,  6,  7,  8,        //  9,  10, 11, 12, 13, 14, 15,        //  16, 17, 18, 19, 20, 21, 22,        //  23, 24, 25, 26, 27, 28, 29,        //  30, 31 ]        Log.d("TAG", Arrays.toString(dateList.toArray()));    }

这是android5.0模拟器上的日历截图，大家可以参考这张图片来理解上述代码

DAY_OF_WEEK的官方解释

public static final int DAY_OF_WEEK

Field number for get and set indicating the day of the week. This field
takes values SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, and
SATURDAY.

See Also

SUNDAY

MONDAY

TUESDAY

WEDNESDAY

THURSDAY

FRIDAY

SATURDAY Constant Value: 7 (0x00000007)

getActualMaximum()

public int getActualMaximum (int field)
Returns the maximum value of the given field for the current date. For example, the maximum number of days in the current month.

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