Question

我的{3}页GridView已ViewPager。我们的想法是建立一个日历的月视图，该视图可以根据用户的需要无限滚动。

我的工作主要基于无限视图分页的Jon Willis'implementation。但不是实现我自己的View对象;我正在使用GridView s。

这是我对onPageScrollStateChanged方法的实现：

@Override
public void onPageScrollStateChanged(int state) {

    if (state == ViewPager.SCROLL_STATE_IDLE) {     

        FragmentPagerAdapter adapter = (FragmentPagerAdapter) mMonthPager
                    .getAdapter();

            // Called to obtain reference for the Fragments inside the ViewPager.
        CalendarGridMonthlyFragment oldMinMonthFragment = (CalendarGridMonthlyFragment) adapter
                    .instantiateItem(mMonthPager, 0);
        CalendarGridMonthlyFragment oldMidMonthFragment = (CalendarGridMonthlyFragment) adapter
                    .instantiateItem(mMonthPager, 1);
        CalendarGridMonthlyFragment oldMaxMonthFragment = (CalendarGridMonthlyFragment) adapter
                    .instantiateItem(mMonthPager, 2);

            // Get the selected month for each Fragment.
        final Calendar oldMinMonth = oldMinMonthFragment.getSelectedMonth();
        final Calendar oldMidMonth = oldMidMonthFragment.getSelectedMonth();
        final Calendar oldMaxMonth = oldMaxMonthFragment.getSelectedMonth();

        if (mFocusedPage == 0) {

            final Calendar newMonth = (Calendar) oldMinMonth.clone();
            newMonth.add(Calendar.MONTH, -1);

            oldMinMonthFragment.setSelectedMonth(newMonth);
            oldMidMonthFragment.setSelectedMonth(oldMinMonth);
            oldMaxMonthFragment.setSelectedMonth(oldMidMonth);

        } else if (mFocusedPage == 2) {

            final Calendar newMonth = (Calendar) oldMaxMonth.clone();
            newMonth.add(Calendar.MONTH, 1);

            oldMinMonthFragment.setSelectedMonth(oldMidMonth);
            oldMidMonthFragment.setSelectedMonth(oldMaxMonth);
            oldMaxMonthFragment.setSelectedMonth(newMonth);
            }  

        mMonthPager.setCurrentItem(1, false);
    }
}

这是我的setSelectedMonth方法：

public void setSelectedMonth(Calendar value) {

    mMonth = value.get(Calendar.MONTH);
    mYear = value.get(Calendar.YEAR);

    CalendarGridMonthlyAdapter newAdapter = new CalendarGridMonthlyAdapter(
            mContext, GRID_CHIP, mGridWidth, mGridHeight,
            mMonth, mYear);

    mGridView.setAdapter(newAdapter);
}

无限滑动工作。滚动完成后，有一个明显的闪烁 - 差不多半秒钟。

调试向我展示了setAdapter方法是所有这些大惊小怪的罪魁祸首。那么有没有办法加快设置新适配器的过程？

..或者可能是另一种方式吗？

提前致谢！

调用setAdapter（）后，GridView加载缓慢

0 个答案: