ExpandableListView + checkbox 滚动勾选失效

ExpandableListView + checkbox在使用该组合控件的时候，遇到当勾选之后滚动控件，会发现之前选中项重新自动变回了没有选中状态，这个问题弄的我无从下手，不断梳理代码逻辑，没有问题，断点跟踪，，，，就是找不到原因，灵魂在Google游荡中，无意间发现一篇国外帖子，说是滚动自动触发oncheckedchanged()；感觉整个世界都蒙 b 了。断点就是自动触发，就是不知道为啥，强迫症驱使我去找问题根源，，，，反而挖坑把自己埋了，最后的解决办法就是在 gechildview()设置oncheckedchanged监听前，将CheckBox

oncheckedchangelistener() 事件设置为null  ，再重新监听，贴上解决源码，强迫症惨痛教训，！！！！！

@Override
public View getChildView(final int groupPosition, final int childPosition
        , boolean isLastChild, View convertView, ViewGroup parent) {
    ChildHolder childHolder;
    VideoCacheT vt = (VideoCacheT) getChild(groupPosition, childPosition);
    if (convertView == null) {
        childHolder = new ChildHolder();
        childHolder.cbSelect = (CheckBox) convertView.findViewById(R.id.cache_cbSelect);
        convertView.setTag(childHolder);
    } else {
        childHolder = (ChildHolder) convertView.getTag();
    }
    childHolder.course_item_videostxt.setText(EduolGetUtil.DataForString(vt.getSection_name()));
    //编辑状态显示勾选框
    if (!vicbSelect) {
        childHolder.cbSelect.setVisibility(View.GONE);
    } else {
        childHolder.cbSelect.setVisibility(View.VISIBLE);
    }

    childHolder.cbSelect.setOnCheckedChangeListener(null); //然后设置CheckBox状态，，这是重点，，，      

boolean sebln = ((getIsSelected().get(vt.getSection_id())) != null ? (getIsSelected().get(vt.getSection_id())) : false);
    childHolder.cbSelect.setChecked((sebln));

    childHolder.cbSelect.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            VideoCacheT vct = (VideoCacheT) getChild(groupPosition, childPosition);
            if (isChecked) {
                    //点击勾选 // 文件在 DataChange 时调用setOnCheckedChangeListener 同步
                    mSelectedDownloadSectionids.put(String.valueOf(vct.getSection_id()), String.valueOf(vct.getSection_id()));
                    //选择下载文件
                    mOnItemSelectListener.onSelected(vct, mSelectedDownloadSectionids);
                    //标记专状态
                    getIsSelected().put(vct.getSection_id(), true);
            } else {
                    mSelectedDownloadSectionids.remove(String.valueOf(vct.getSection_id()));
                    //不选择
                    mOnItemSelectListener.onNoneSelect(vct, mSelectedDownloadSectionids);
                    //标记专状态
                    getIsSelected().put(vct.getSection_id(), false);
            }
        }
    });
    setBackgroundOnClickListener(childHolder.cbSelect, convertView, vt);

    return convertView;
}