Method getDay

lib/DevApp/src/main/java/dev/utils/common/DateUtils.java:597–600

获取天数 @param calendar Calendar @return 天数

(final Calendar calendar)

     * @return 天数
     */
    public static int getDay(final Calendar calendar) {
        if (calendar != null) return calendar.get(Calendar.DAY_OF_MONTH);
        return -1;
    }

    // =