ListView多种item注意以及自己出现的莫名其妙的错误

    @Override
    public int getViewTypeCount() {
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        if (position == 0) {
            return 0;
        }
        return 1;
    }

 @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        int type = getItemViewType(position);
        ViewHolderTotalCount totalCount;
        ViewHolder holder;
        if (convertView == null) {
            switch (type) {
                case 0: {
                    convertView = View.inflate(context, R.layout.item_total_count, null);
                    totalCount = new ViewHolderTotalCount();//下面对hoder的子空间赋值
                    convertView.setTag(totalCount);
                }
                break;
                default: {
                    convertView = View.inflate(context, R.layout.item_customer_pool, null);
                    holder = new ViewHolder();//下面对hoder的子空间赋值
                    convertView.setTag(holder);
                }
                break;
            }
        }
        switch (type) {
            case 0:
                totalCount = (ViewHolderTotalCount) convertView.getTag();
               //这里对holder 的TextView等空间赋值
                break;
            default:
                holder = (ViewHolder) convertView.getTag();
              //  //这里对holder 的TextView等空间赋值
                break;
        }



        return convertView;
    }