private void setSettleInfo() {
   String[] infos = ShoppingCartBiz.getShoppingCount(mListGoods);
   // 删除或者选择商品之后,需要通知结算按钮,更新自己的数据;
   if (mChangeListener != null && infos != null) {
     mChangeListener.onDataChange(infos[0], infos[1]);
   }
 }
 private void selectAll() {
   if (mChangeListener != null) {
     mChangeListener.onSelectItem(isSelectAll);
   }
 }