Design And Implementation Of A Mobile Learning System Based On Android Platform

With the development of information technology, there has been many novels anddiversified learning methods. The mobile learning effectively integrates modernpeople’s scattered, discontinuous, and fragmented time to meet the needs of people’sliving and working. The gradually mature mobile network technology, the cheapmobile terminal equipment and the broad social market demand have providedfavorable conditions for the development of mobile learning technology. Although theresearches on mobile learning has been widely carried out in our country, covering allfields of primary schools, secondary schools, universities and remote education, inorder to meet the need of the higher vocational education in our country, theapplication of mobile learning is still a blind spot.This thesis focuses on the real situation of the existing vocational school teaching,combining the Bayesian classification, smart client development, streaming real-timesynchronous transmission with other related technologies, basing on the Androidplatform studies that can be used to select the course content, online video viewing,online test, online Q and other functions of mobile learning system, using vocational"web design and production" course teaching, to effectively address the quality ofstudents in higher vocational education system, to meet the need of practical andtargeted learning content requirements, to solve the problem that the knowledge andskills are various in different regions and other issues. The main work of this thesis isas follows:(1) The researcher do a in-depth study on the existing mobile learning knowledgeand their specific implementation technology, consider that there exists big differenceof vocational students in culture background, professional quality, learning styles andother issues, we classified vocational students’ learning style on the basis of Bayesianclassification and constructed students’ activity-centered systematic functional model,so that students can predict the learner’s learning style by reviewing the leaningrecording. The researcher designed a rudimentary system framework according to thecoarse features of "web design and production", and developed three roles modulecontains managers, instructors and students.(2) In order to cope with the feature of massive multimedia data and the higherquality transferring requirements of limited bandwidth, the researcher designed streaming real-time synchronization algorithm and adaptive bandwidth streamingreal-time synchronization algorithm based on the estimated network latency for twosolutions; the bandwidth adaptive transmission algorithm is mainly used in thechannel congestion, to adjust the bit rate by increasing or decreasing factor, therebyenhancing the video stream of QoS in the process of transmission; whilenetwork-based delay Kademlia algorithm is to save network data transmission time byfinding the nearest transport nodes. These two programs effectively solute thereal-time synchronization of video transmission, meet the need for real-timetransmission.(3) In the design of client and user interface, based on MVC theory, eachsub-function modules independent to each other, and such kind of design enables thesystem good scalability, by using the Web Service implementation to meet the need ofinteraction between client and server.Finally this design shows good client interaction effect in the simulator and thereal machine, the system has been tested to be operated normally, which also realizethe function of real-time synchronization with a good video transfer capacity.