在使invalidlateout容器无效后,未调用子视图的ondraw()

Question

我正在编写一个日历视图.当我按下一个月的按钮时,我调用了mCalendarContainerLL.invalidate();但我的自定义视图没有被重绘.我的自定义视图中的onDraw方法没有被调用.

Ps:如果我直接使所有日历单元格视图无效.它有效.为什么会这样？

这是代码:

private CalendarWidgetDayCell updateCalendarView() {

        CalendarWidgetDayCell dayCellSelected = null;
        boolean isSelected = false;

        final boolean isHasSelection = (mCalendarSelected.getTimeInMillis() != 0);

        final int selectedYear = mCalendarSelected.get(Calendar.YEAR);
        final int selectedMonth = mCalendarSelected.get(Calendar.MONTH);
        final int selectedDay = mCalendarSelected.get(Calendar.DAY_OF_MONTH);

        Calendar dateXOfCalendar = Calendar.getInstance();
        dateXOfCalendar.setTimeInMillis(mStartDateCurrentMonth.getTimeInMillis());

        Log.d(tag, "updateCalendarView cpt_func_ " + "mDayCellList.size(): " + mDayCellList.size());
        for (int i = 0; i < mDayCellList.size(); i++) {
            final int yearOfCellItem = dateXOfCalendar.get(Calendar.YEAR);
            final int monthOfCellItem = dateXOfCalendar.get(Calendar.MONTH);
            final int dayOfCellItem = dateXOfCalendar.get(Calendar.DAY_OF_MONTH);
            final int dayOfWeekOfCellItem = dateXOfCalendar.get(Calendar.DAY_OF_WEEK);
            CalendarWidgetDayCell dayCellItem = mDayCellList.get(i);

            boolean isToday = false;
            if (mCalendarToday.get(Calendar.YEAR) == yearOfCellItem) {
                if (mCalendarToday.get(Calendar.MONTH) == monthOfCellItem) {
                    if (mCalendarToday.get(Calendar.DAY_OF_MONTH) == dayOfCellItem) {
                        isToday = true;
                    }
                }
            }

            // check holiday
            boolean isHoliday = false;
            if ((dayOfWeekOfCellItem == Calendar.SATURDAY) || (dayOfWeekOfCellItem == Calendar.SUNDAY))
                isHoliday = true;
            if ((monthOfCellItem == Calendar.JANUARY) && (dayOfCellItem == 1))
                isHoliday = true;

            isSelected = false;
            if (isHasSelection) {
                if ((selectedDay == dayOfCellItem) && (selectedMonth == monthOfCellItem)
                        && (selectedYear == yearOfCellItem)) {
                    isSelected = true;
                }
            }
            dayCellItem.setSelected(isSelected);

            boolean hasRecord = false;

            if (isSelected)
                dayCellSelected = dayCellItem;

            dayCellItem.setViewParam(yearOfCellItem, monthOfCellItem, dayOfCellItem, isToday, isHoliday,
                    mCurrentMonthInCalendar, hasRecord);

            dayCellItem.invalidate();//It works well.
            dateXOfCalendar.add(Calendar.DAY_OF_MONTH, 1);
        }

        // mCalendarContainerLL.invalidate();//This is not working as expected.
        return dayCellSelected;
    }

Answer 1

如果invalidate()在布局级别调用,则布局决定,必须重绘它的哪些部分.因此,它invalidate()仅调用受影响/脏的子视图.布局中看不到对一个单元格的更改,因此布局看不到使任何子项无效的必要性.

当需要重绘时,您应该让视图本身失效.在你的情况下,我会invalidateSelf()在setParamView方法中添加一个调用.据我了解代码,这是负责在日历中装饰一个单元格的方法.