**在二級列表的佈局裡寫，注意寫在 return view 之前**
        holder.tv_del.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                List<GoosBean.DataBean.DatasBean> datasBeen = childList.get(groupPosition);
                GoosBean.DataBean
 
.DatasBean remove = datasBeen.remove(childPosition);
                if (datasBeen.size() == 0) {
                    childList.remove(groupPosition);
                    groupList.remove(groupPosition);
                }
                EventBus.getDefault().post(compute());
                notifyDataSetChanged();
 

            }
        });