关于listview适配器，记录而已

成员变量如下：

private ListView mListView;private ArrayList<ShopCartPo> mGoods;private ShoppingCartAdapter mAdapter;mListView = (ListView) this.findViewById(R.id.id_lv_shopping_cart);mGoods = new ArrayList<ShopCartPo>();mAdapter = new ShoppingCartAdapter(this, mGoods, R.layout.shoppingcart_item);

错误赋值：

mGoods = gson.fromJson(response, listType);//此处解析返回的是一个ArrayList对象mAdapter.notifyDataSetChanged();

原因：因为notifyDataSetChanged()更新的是原数据对象，此处相当于重新给mGoods一个地址，也就是说
mAdapter = new ShoppingCartAdapter(this, mGoods, R.layout.shoppingcart_item);里面的mGoods是没有改变的,依然是空。

正确做法：

mGoods.addAll((ArrayList<ShopCartPo>) gson.fromJson(response, listType));mAdapter.notifyDataSetChanged();