Implementation Of O2O Closed Loop Application Based On Android

With the rapid popularization of mobile internet and intelligent mobile terminal,the mobile O2 O industry rapidly developed. The offline consumption certificate identification bought form online by users was key point in O2 O closed loop flow.And at present, in the mobile O2 O application, SMS password and two-dimension code were adopted to be the electronic certificate application and NFC technology was rarely adopted. Using Android to be development platform, the client side were designed based on “Best in 114” server platform, which realized the O2 O closed loop application adopted NFC technology.Adopting C/S mode system architecture, the general plan of O2 O closed loop application was designed, which included the project of server function and client-side function and intercommunication method. The server provided support for the acquisition of data and generated electronic certificates information. The client-side ask request from server-side and the received data was analyzed and exhibited. The client-side included user-side and merchant side. The user-side provided product information exhibition and payment service, which acquired electronic certificate from sever and wrote the electronic certificate into NFC chip; the merchant side was used to scan and authenticate NFC electronic certificate. The client-side function was realized by means of modularization, which included the log-on and register module、product exhibition module、purchase and payment module etc. The module of merchant side was electronic certificate module. The server was communicated with the client side by http connection. In the http request sent from client side to server, part of URL was wrote into local C folder and invoked by JNI.The critical user information segment was encrypted by MD5 encryption algorithm,and the returned client side data from server was encrypted by DES encryption algorithm, which can satisfy the safety performance requirement of the system.At last, the NFC certificate identified O2 O closed loop application test platform was build up and the the function and performance of the software were respectively tested. The validity of the designed O2 O closed loop application project and its function modules was tested, and it can satisfied the safety requirement by means of analyzing encryption process.