摘要现有的手工签到方式由于具有效率低、成本相对较高、并且容易出现代签的缺点，已经不能满足人们对签到系统快速、方便、环保、安全性等各方面的要求，急需开发一种新的签到考试系统来弥补这些缺点。QR码的快速发展以及安卓系统的逐步普及，为这样一种考试签到方式的出现提供了重要的平台，使基于二维码的安卓考试签到系统成为可能。二维条码(2-dimensional barcode)是新型发展起来的条码识别技术,特点在于在二维空间上存储信息，在译码和编码方面使用了“0”、“1”逻辑概念。目前主流二维条形码有：Data Matrix，QR Code，PDF417等。其中QR码在识读、纠错、有效表示字母等方面的优势，因此研究基于二维码（QR）的考试签到系统具有重大意义。86785

 本文实现了基于安卓平台的考试签到系统，通过扫描考生准考证的二维码实现考试签到功能。本系统主要实现了生成考生信息二维码图像、开始签到、签到重置、签到统计、手动签到等主要功能。通过添加考生的姓名、班级、学号生成二维码图像并保存到手机中；利用安卓手机的内置摄像头扫描考生的准考证中的二维码图像完成本次考试签到；统计已签到的考生信息；清空签到信息；在扫描出故障时，管理员通过手动签到功能添加考生信息完成签到。

通过对本系统所能实现的功能进行测试，测试结果证明此考试签到系统界面简洁、功能完善，能够实现管理员添加考生信息生成二维码、签到、签到统计和重置签到功能。为了提高该系统的可靠性，本考试签到系统提供了手工签到功能，在系统扫描功能出现故障的情况下，可以通过添加考生信息完成签到。

毕业论文关键词：考试签到系统；二维码；Android 

ABSTRACT Existing manual attendance mode Due to inefficiencies, cost is relatively high, and easily the shortcomings of modern sign, can not meet the people's attendance systems quickly and easily, environmental, safety and other requirements, now in urgent need of a new the sign way to replace the traditional way sign。 The rapid development of QR codes as well as the gradual popularization of Android system, for the emergence of such a sign test method provides an important platform to Android exam attendance system based on two-dimensional code as possible。 Dimensional bar code (2-dimensional barcode) is developed on the one-dimensional bar code bar code recognition technology, can store information on all two-dimensional space, we used a "0" in the decoding and encoding, the "1" logic concept。 Currently there are two-dimensional barcode mainstream: Data Matrix,, QR Code, PDF417, etc。 Wherein QR yards advantage in reading, error correction, and other aspects of the letter can be effective, the study exam attendance system based on two-dimensional code (QR) is of great significance。

 In this paper, based on the realization of the two-dimensional code exam attendance system, the candidates admission ticket by scanning two-dimensional code to achieve exam to check in。 The main achievement of the two-dimensional code generation candidate information, start sign, sign reset, attendance statistics, attendance and other major functions manually。 Candidate information is generated by adding the two-dimensional code feature candidates name, class, student number to generate two-dimensional code and save it to your phone; begin check-ins use Android phone's camera to scan the ticket candidates to complete this exam attendance; attendance statistics Statistics Checked candidate information; check-reset function empty check-ins; when scanning fails, check-ins manually by the administrator to add information to complete the check-in candidates。

Through this system can realize the function test, the test results show that this short-answer exam attendance system interface, fully functional, enabling administrators to add candidates to generate two-dimensional code information, attendance, attendance statistics and reset the check-ins。 In order to improve the reliability of the system, this system provides a manual exam attendance attendance, failure in the system scanning function, is still done by adding a sign candidate information。