Design And Implementation Of ANDROID Multimedia Sharing System Based On DLNA Protocol

With the development of communication technologies and integrated circuit technologies,the intelligent terminal devices based on Android platform have become indispensable parts in people's daily life for its small size to take along easily,comparing with other household devices.Meanwhile,the development of information technologies and digital imaging technologies,it's easy for people to get and store all kinds of multimedia files with different format,edited by themselves or downloaded from other web sites,with the intelligent terminal devices they have.In the era of entertaining everyone rather than yourself,the way how to share favorite multimedia files with others conveniently and quickly has been urgently needed for the great majority of the people and become technological difficulties from the perspective of many communication terminal equipment manufacturers and home automation enterprises.The emergence of DLNA makes the way of media sharing among people break through the limit of traditional transmission speed and intermediate storage medium,which makes the way of media sharing step into a new era.On the basis of DLNA protocol,the application in this article developed and implemented based on Android system,which is widely used as a intelligent terminal platform,can make devices in the same wireless network discover each other,access and play multimedia files stored in their file systems.This application of sharing multimedia files make it quick and convenient for people in their daily usage,because it does not need any manual configuration.Comparing with traditional transmission by bluetooth,this way of sharing multimedia files does not search and pair to availabe devices and does not need to finish received completely to play,and in fact,the transfering rate is much faster than by bluetooth as well.Comparing with traditional copy-paste by intermediate storage disk,this way does not to do this operation eigher,because it makes it practical to access and play multimedia files from other devices,instead of finishing coping the multimedia file to local storage from other storage equipment.In a word,the applicaiotn in this article will impove greatly people's family life,study,work and entertainment.During the study and the implementation process,it is concluded that I select Java language based on Android platform,which is really object-oriented language,and I think this group has its own advantage,by comparing Android platform with iOS platform,comparing Java development language based on Android with object-C development language in iOS environment,and consideration of the requirements of the programmer and the development period of the system,during the existing development of intelligent terminal system and many development languages presently.The main work of this paper includes:1.In the article,there logic devices are designed in DLNA as one device in function integration to make users share their multimedia files easily and conveniently and enhance user experiences.That is to say by this way,DMS,DMC and DMP can be regarded as one device physically for users,but their functions are seperated from each other in logic.In the process of usage,it is up to users to decide one of them to be DMC,DMS or DMP by different operations.The design makes operations convenient for users,further more,solves the limit whether people should have certain knowledge background or not,no longer need to know what is the server,what is the controller and what is the player,do not care about how they work to share multimedia files with each other.2.Based on DLNA protocol,to effectively resolve the problem of the safety for the users,digital security authentication technology is imported in both DMS and DMR sides and make key encrypted in whole authentication process when DMR wants to access and control DMS by requesting authentication verifiation from DMR to get resources with UUID.3.Through in-depth researching DLNA protocols,the media sharing system is developed and implemented based on Android platform.The system application can be installed or preloaded into devices of Android platform.They can be found by each other and share multimedia files mutually in the same wireless network.The application makes users share their multimedia resources conveniently,avoiding traditional sharing way of copy and it brings end users very perfect entertainment,enlarge the scope of the crowd who are willing to share their multimedia files.By test and analyze the logs captured by Wireshark tool,which includes all the process from starting app to finish sharing and playing the video file between two smart phones.it has been proved that the multimedia files sharing system is secure to share,fluent to play,more convenient,efficient and practical to be used by users.