今天星期几呢？星期格式化

今天水一篇星期转换的文章

星期转换要注意的时，有些地方一个星期的第一天不是周一的。需要进行判断。

上代码：

 try {
                Logger.d("weatherInfo.getTime() == > " + weatherInfo.getTime());
                Date date = dateFormat.parse(weatherInfo.getTime());
                //获取星期
                Calendar cal = Calendar.getInstance();
                cal.setTime(date);
                Logger.d("date ==> " + cal.getTimeInMillis());
                //一周的第几天
                boolean isFirstSunday = (cal.getFirstDayOfWeek() == Calendar.SUNDAY);
                Logger.d("isFirstSunday ==> " + isFirstSunday);
                int w = cal.get(Calendar.DAY_OF_WEEK);
                if (isFirstSunday) {
                    w -= 1;
                    if (w == 0) {
                        w = 7;
                    }
                }
                Logger.d("week index==> " + w);
                int weekStringResId = getWeekStringResId(w);
                String weekText = itemView.getContext().getString(weekStringResId);
            } catch (Exception e) {
                e.printStackTrace();
            }

下标w跟星期的关系：

private int getWeekStringResId(int position) {
        int resId = R.string.monday;
        switch (position) {
            case WEEK_INDEX_MONDAY:
                resId = R.string.monday;
                break;
            case WEEK_INDEX_TUESDAY:
                resId = R.string.tuesday;
                break;
            case WEEK_INDEX_WEDNESDAY:
                resId = R.string.wednesday;
                break;
            case WEEK_INDEX_THURSDAY:
                resId = R.string.thursday;
                break;
            case WEEK_INDEX_FRIDAY:
                resId = R.string.friday;
                break;
            case WEEK_INDEX_SATURDAY:
                resId = R.string.saturday;
                break;
            case WEEK_INDEX_SUNDAY:
                resId = R.string.sunday;
                break;
        }
        return resId;
    }

相关的常量：

    public static final int WEEK_INDEX_MONDAY = 1;
    public static final int WEEK_INDEX_TUESDAY = 2;
    public static final int WEEK_INDEX_WEDNESDAY = 3;
    public static final int WEEK_INDEX_THURSDAY = 4;
    public static final int WEEK_INDEX_FRIDAY = 5;
    public static final int WEEK_INDEX_SATURDAY = 6;
    public static final int WEEK_INDEX_SUNDAY = 7;