毕业设计（论文）-基于Adroid的断点续传下载软件.docx

中北大学信息商务学院2013届毕业设计说明书第 PAGE \* ROMAN \* MERGEFORMAT II页 共Ⅱ页毕业设计说明书断点续传下载软件学生姓名： 学号： 学 院： 系 名： 专 业： 指导教师： 2013 年 05月基于Android的断点续传下载软件摘要：现在人类已经迈进信息化时代，网络通信体现在各个领域，怎样充分利用网络带宽获得最快的下载速度，从而达到时空和效率的统一是信息化时代的必然趋势。现在人们之间的文件传输越来越频繁，数据在传送的过程中可能因为网络中断或断电而中断文件传输。为了应对这些突发事件，开发了支持断点续传的下载软件，从而避免了资源的浪费并且加快了下载速度。随着载有Android系统的移动终端设备的销量在世界范围内持续高涨，基于Android平台开发移动终端应用软件正成为一种趋势。本文在Android手机终端利用 HttpClient 编程实现客户端/服务器模式的文件传输，开发了多文件同时传输以及支持断点续传的高效传输软件与方法。本课题具体的研究内容是实现在传输文件中途被中断，以继续下载的方法，继续下载时计算出已下载的数据量，并记录连续传输的断点位置用于从断点开始下载。当文件下载过程中出现断电或者网络被切断或者应用程序崩溃，并造成下载失败，基于移动终端再进行传输的过程，可以自动识别不完整的文件并继续下载。关键词：Android，移动终端，断点续传，下载，HttpClientThe transmission resuming at break-points Software For AndroidAbstract: Human has entered the information age, the network communication is reflected in the various fields. The inevitable trend of the information age is how to make a full use of network bandwidth to get the fastest download speed, so as to reach the unity of time and space and efficiency. Now the file transfer between people become more and more frequently, however, the file transfer may be interrupted by some accident, such as network interrupter computer power failure. In order to respond to these emergencies, this article develop a download software with the functions of broken-point continuingly transfer, this download software can accelerate download speed, at the same time avoid the waste of resources. As an impact of the continuously increasing sale volume of mobile terminal devices using Android system, designing mobile terminal applications based on Android platform has become a trend.In this paper, we take Httpclient-programming to accomplish Client/Server model File Transfer System and develop multiple files transferring simultaneously to support transmission resuming at break-points efficient software and methods,The invention claims a method for realizing transmission resuming at break-points of incremental data