基于云计算的Android即时通讯系统的设计与实现

1摘要Internet的出现，不仅为人类提供了信息交流的新技术、新方法和新媒体，而且为人类提供了新的开放式的交流平台，开创了新的生活方式。而互联网的普及使得一种新的“即时通讯工具”成为了人们使用频率最高、最为流行的通讯工具，它的发展也随着信息技术的发展日益成熟和完善，它不仅提供了人际交往的新方式，加快了联系的速度，降低的交往的成本，提高了交往的效率，而且使人际交往从个人所熟悉的强联系人群，延伸到了原本遥远、陌生的弱联系人群。作为一种便捷的网络通讯技术，即时通讯软件已经越来越深入人心，应用范围从单纯的网络聊天工具变成工作生活所不可或缺的信息交流平台。正因为它的重要性，找出其存在的问题和其自身的局限性，显得尤为迫切。根据大量文献总结和对实际情况调查，从两方面进行了详细的阐述：一方面目前的IM软件基本上都集中在MSWindows平台上，很少考虑智能手持设备终端用户的需求；另一方面各个商业软件使用各自的私有的IM协议，使得各个IM之间不能互相通讯，这给IM应用的普及带来了不便。因此如果能将网络即时通讯软件引入Android操作系统并能够解决软件的互通，对Android系统和即时通讯软件普及有重要意义。通过分析和研究即时通讯模型，并对当前几种流行的即时通讯协议的对比，决定采用基于XML的Http协议，同时对服务器的通信方式、连接方式和服务模式做出了选择。（摘要还要写自己在什么开发平台上，用什么开发工具，开发语言，做了什么事情（软件工程的分析，设计，实现）？，结果怎么样？效果怎么样？有什么特色？特点？关键词：即时通讯、Android、XML2AbstractToday，instantmessage（IM）havebecomeanessentialtoolforeachpersonontheInternet.Itovercomesthetraditionalinterpersonalspacetimeconstraint,expandtheexchangingspaceandmeansbetweenpeople.However,itsrapiddevelopmenthasgreatlychangedunderstanding,thewayofpeople’sexchangesandemotion,whichletssomerelationshipsinrealtimebecomevirtualandindirect,enablesthepracticalskillsofpeopletodropin,andalsomakespeople’smentalproblemsemerge,suchaslonelinessandindifference,trustcrisisandsoon.AllofthismakestherelationshipsthatseemtogetcloserandcloserundertheinfluenceoftheInternetbecomemoredistant,lackofmutualunderstanding,andbeonthealertbetweenpeople.SothestudyfortheInstantmessagingtotheimpactofinterpersonalrelationshipshasimportantpracticalsignificance,andattractsincreasingattention.Asakindofconvenientsocketcommunicationtechnique,instantmessagingsoftwarehasdeepintopeople’sheart,applicationrangefromsinglenetworkchattooltoinformationcommunicationplatform.Duetoimportance,findingoutexitingproblemsandlocalizationseemsespeciallyimperious.Accordingtoamountofliteraturesummaryandsurveytopracticalsituation,twofacetsaresetforthasfollows:First:atpresent,IMsoftwarecentralizesundertheMSWindowplatformonthewhole,nottakingintaccounttheneedofuserswhoapplyintelligencesupportfacility;Second:Allkindsofbusinesssoftwaremakeuseofeachprivateprotocol,soasnotto3communicationamongthem,andthisbringitinconvenienceinthespreadofapplication.SoifnetworkIMisimportedAndroidandsettleintercommunicationofthem,notonlythismakesupforlackofinternetapplicationsonAndroid,butalsoboostesthespreadofAndroidandIMsoftware.OveranalysisandinverstigationofIMmodel,constrastwithafewofprevalentprotocols,TheauthordecidestoapplyHttpbasedonXML,putsforwardagoodexpansibilityofnetworksoftwareframe,makechoiceofcommunicationmode、connectmodeandservemode.Keywords：Instantmessage、Android、XML4目录摘要..............................................................................................................................................1Abstract.............................................................................................................................................2第一章绪论.................................................................................................................................51.1即时通讯的概念............................................................................................................51.2即时通讯的国内外发展状况.......................................................................................61.3课题研究内容................................................................................................................7第二章即时通讯系统分析与设计.............................................................................................82.1需求分析.........................................................................................................................92.1.1功能需求............................................................................................................92.2概要设计.......................................................................................................................112.2.1系统框架设计..................................................................................................112.2.2功能设计..........................................................................................................132.3数据库设计..................................................................................................................17第三章系统客户端、服务器开发平台搭建.........................................................................193.1系统客户端开发平台搭建.........................................................................................193.1.1开发Android程序软件需求........................................................................193.1.2开发Android程序硬件最低需求................................................................193.1.3JDK的安装.......................................................................................................193.1.4Android开发环境的安装..............................................................................213.1.5安装Eclipse插件ADT..................................................................................233.2系统服务器开发平台搭建.........................................................................................24第四章系统客户端设计与实现.............................................................