Design And Development Of DLNA Multi Screen Interactive System Based On Android System

With the development of computer technology,as well as a variety of intelligent electronic products and home appliances such as smart phones,tablet PCs,home PCs and the popularity of smart TV,people's way of life entertainment has undergone tremendous changes.Today,through these smart devices to see the video,listening to music and enjoy the picture has become a major way of young people pastime,including smart phones and other mobile devices because of its convenience and compactness favored by people,but through the mobile device users can not be very convenient The acquisition of multimedia resources on other devices,coupled with the smaller screen of mobile devices makes the user's experience of watching videos and pictures poor.In order to enhance the user experience and promote the further popularization and development of multi-screen interactive technology,it is proposed to realize the demand of multi-screen interactive system based on DLNA(Digital Living Network)in Android operating system to realize the mobile phone with TV box(or intelligent TV),multi-screen interactive between PC functions.According to DLNA protocol standard,combined with UPnP working principle,this paper achieved a DLNA multi-screen interactive system in the Android operating system.The system consists of four modules,of which the media server module to achieve the content delivery services and connection management services;The media player module implements playback control services,connection management services and transport control services,and the module integrates the ijkplayer playback framework to support more media formats;The implementation of the control point module is to call these services to control the two media transmission and playback control,in the module design and implementation process,put forward an "exclusive" control mode,the model to ensure that the control point and the media The reliability of the communication of the player;the network protocol module provides the communication foundation for the other three modules,and in order to ensure the control point and the connection of the two,in the system of network communication to increase the security mechanism.Finally,the system of three functional modules(media server,media player and control point)will be installed to the phone side,and then one of the media player installed on the TV box or smart TV,and combined with Windows Media Player third party DLNA Multi-screen interactive system,functional tests,performance tests and compatibility tests were performed for the system of the three functional modules and test results show that the system has reached the design goals.