基于Android平台的即时通讯系统客户端的设计与实现
本软件主要设计一个基于Android平台的即时通信软件，目前移动终端设备可用的即时通信软件存在一定的使用限制，通信协议各异导致不同的客户端软件之间无法通信，但使用跨平台的XMPP协议可以解决这一限制。本软件使用OpenFire作为服务器，Sqlit作为数据库，并且运用Android提供的强大通信类库ASmack进行客户端开发，主要研究一下几个方面内容：
（1）分析现有即时通信软件以及本软件开发意
（2）对XMPP协议的学习和研究，XMPP协议是以XML为基础的可扩展的即 时通信协议，继承XML的灵活的可扩展性，以XML数据流为载体进行数 据传输，协议规定了通信能够在服务器、客户端、网关三者的任意两个 之间双向发生。服务器同时承担了客户端信息记录，连接管理和信息的 路由功能。网管承担着与异构即时通信的系统可以包括SMS（短信），MSN， ICQ等。基本的网络形式是单客户端通过TCP/IP连接到单服务器，然后 在之上传输XML。
（3）使用Android提供的技术通信类库ASmack实现客户端手机应用模块。 ASmack是Android平台上的用于和XMPP服务器进行通信的类库。
（4）程序完成演示效果。使用OpenFire和Android模拟器进行测试。本软 件完成基本聊天功能，查看历史聊天纪录，手机端的相关设置等功能。
关键字： AndroidXMPP 即时通信
Research and Implementation of Android Moblie Instant Message System
Abstract: Today, in the modern society of information of the 21st century , mobile phones and other wireless devices has been infiltrated by people lives and works, smart phones leisure and entertainment applications has become the mainstream market trends. Along with the upgrading of the network - the popularity of 3G, 4G emergence of people's lives has been inseparable from the network gradually. With continuously improve of the performance of smart phones, a emergence of Android mobile phone development and application appeared。
This article aims to design a Android mobile instant messaging system, the goal is to implement the communication between the phone and the phone. Mobile terminal equipment available there are some restrictions on the use instant messaging software, communication protocols different result between different client software can not communicate, but cross-platform XMPP protocol can work around this limitation. The system uses the open-source Openfire communication server, the MySQL database to store user data, with ASmack class library for client development. In this thesis, do the work of the following aspects:
(1) Analyze the significance of this stage phone instant messaging market situation and prospects, as well as design subsection applications.
(2) Do the research and analysis on the XMPP protocol XMPP protocol based on XML-based scalable real-time communication protocols, the inherited XML flexible scalability, XML data stream as the carrier for data transmission, the Agreement provides that communications can in the server, the client, gateway any two of the three bi-directionally between.