Android客户端与PHP服务端交互(一)
背景
作为一个普通上班族，总是想做一些自认为有意义的事情，于是乎准备成立一个工作室，尽管目前正在筹备阶段，但是之前有些朋友提出一些需求的时候，我发现自己的能力还是有限，直到最近和一些技术牛朋友聊起这事儿，大家不谋而合，也准备加入小团队。只是我作为工作室的“业务员”，感觉有必要都了解一下，这样才好和客户沟通，提出解决方案，也方便大家讨论订方案。譬如之前有商家提出的在线订单，要求客户可以使用APP直接下单，商家处理订单。当时我不是很懂，自己接不了，现在和朋友交流后，准备学习一下。
框架
① 客户提交订单到Web服务器
② Web服务器处理订单
③ Web服务器回复处理结果给客户
④ Web服务器推送消息给商家
⑤ 商家查询订单
想要完成上述的功能，我首先需要了解两个知识点，第一个是客户端(Android)与服务端(PHP)通过JSON进行数据交互，第二个是服务端(PHP)推送消息到客户端(Android)。
结尾
呵呵，还没开始就到结尾了，在写这篇文章之前，我已经对这些有了了解，文章尽最大努力详细的描述，但是难免忽视掉一些细枝末节，在此请看官见谅。本篇提出了框架，下一节具体介绍实现方法。
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