Android点餐系统客户端首先由更新功能从服务器获取菜品信息，存储到本地数据库中，开桌生成订单号和座位号，点餐记录顾客所点的菜品，下单将订单号，座位号及菜品列表发送到服务器，并接收服务器返回信息。(Android ordering system first by the client from the server update function of access to food information stored in the local database, open the table