Design And Development Of Qinhuangdao "Cheng Nong Tong" Mobile Phone APP

Qinhuangdao city is rich in resources of agricultural products in rural areas,urban areas of agricultural products demand,but the interactive information of agricultural products between rural and city is still in a relatively backward stage.In view of this situation,Qinhuangdao "Chengnongtong" mobile phone APP was designed and developed to solve the problem of efficient publication and timely matching of agricultural product information between rural and urban areas,and to provide convenience for the supply and purchase of local farmers and citizens.Based on the analysis of the actual supply and purchase status of agricultural products in Qinhuangdao City,this paper designs and implements the "Chengnongtong" mobile phone APP.The system is mainly based on Bmob back-end cloud and is written in Java language.The development environment for APP design is built.MVC is adopted as a whole design mode.Activity,Fragment and other components,TextView,ImageView and other controls are used extensively.Each functional module is designed in detail.Through the integrated BmobSDK,the mobile terminal is connected with the cloud terminal to realize data storage,instant messaging,information pushing function,and so on.In the design and development,some technical processing methods are added,such as photo shooting and clipping,image distortion processing and compression processing,return key processing,voice playing,custom control,privilege processing and so on."Chengnongtong" mobile phone APP provides users with registration,information inquiry,information release,information purchase,matching information,voice help,voice calls,private communications,personal information modification and other functions.After testing and improvement,the project runs smoothly on various Android phones,responds quickly,has a clear interface,and operates simply and flexibly.Qinhuangdao "Chengnongtong" mobile phone APP can publish the information of supply and purchase of agricultural products,and match the information of supply and purchase.It can inform users in time through instant messaging,which opens up a new channel for the information circulation of agricultural products in Qinhuangdao and has the value of use and popularization.