毕业设计开题报告-85

ReportforGraduationDesign

ofNanjingUniversityofPostsandTelecommunications

Subject

IntractiveOnlineGamesBasedonWi-fiintheAndroidSystem

——ImplementtheInterfaceandPlanning

StudentName

WeihanZhou

StudentID

H07000308

Major

ElectronicEngineering

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I

.LearningandComprehension

Withthedevelopmentofmobileandpersonaltelecommunicationtechnology,peoplebecomeincreasinglydemandformobiledatacommunications.Variousmobiletelecommunicatingterminals,suchaslaptop,PDA,PC.Atthemeantime,plentyofmobilephoneshavebeendesignedwiththeInternetfunction.Thenewgenerationofmobileterminalplatformbecomingmoreandmorehumanizedsodoesthefunction.GooglecompanylaunchedtheAndroidsystemin2007,whichispopularallovertheworld.Android,runningbasedonLinuxkernel,ownsdiversityofapplicationsandwi-fiwhichmakethevalue-addedservicesmoreexcellent.

ThissubjectrequiresadeepcomprehensionandacknowlegmentforAndroindSyste,sothat本beablettoimprovetheWi-FifunctioninthissystemtoacquiretheAd-hocapplication.Inadditon,thesubjectwillbedesigntoplaytheInternationalChessBattleontwocellphonesatthesametime.Thesubjectcloselyconnecttothedailylife,willbewidelyusedamongpeople,namely,ithasasignificanteffectonthepracticingandmarketing.Asforme,IamresponsibleforimplementingtheAd-hoc.

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II

.InvestmentandStudy

TheThepreparationofthesubjectistostudythetheory,toknowthebasicsituationofAndroidsystemandtheworkingprincipleofwi-fiasthemainprocessoftheimplementofAd-hoc.Inwhich,IfocusontheWi-fitechnology.

1.IntroductiontotheAndroidSystem

Android,referstothe“Rebort”,alsoisanominationforopensourceoperationsystemusedoncellphones,whichisbasedontheLinuxKernelpublishedbyGoogleCompanyonNovember5th,2007.Linux,knownasthefirstopenandintergralmobilesoftwareformobileterminals,isaplatformconsistsofoperatingsystem,middleware,users’interfaceandapplicationsofeware.Sofar,thelatestversionisAndroid2.4GingerbreadandAndroid3.0Honeycom.

AndroidwasdevelopedbyGoogleintheearlytime,andthenbyOpenHandsetAlliance.Itusesthesoftwarestackframework,anddividesintothreecomponents.ThebottomofLinuxKernelonlyprovidesthebasicalfunctions,whileotherapplicationsoftwares,writteninJavalanguagepartly,aredevelopedbydifferententerprisesindividually.

DuetotheJavalanguage,androidhasvariouschanges,rangingfrominterfacestofunctions,Forinstance,ActivityequalstoMIDletinJ2ME,aActivityclasscanbeusedtosetupwindow,aworkingActivityisabackgroundoperationprogramcalledService,runningundertheforegroundmodel.BothforegroundandbackgroundarecombinedbyServiceConnectionandAIDL,inordertoachievetheeffectofrunningincomplexprocedures.WhentherunningActivityreplacedbyotherones,itwillbestopped,evenkilledbysystem

What’smore,ViewequalstotheDisplayableinJ2ME.ProgrammerscanputUIonthewindowsthroughViewclassand“XMLlayout”file.Androind1.5buildtheWidgetsbyView,anddesignlayoutbyxmlforthefactthatWidgetisoneoftheViewclass.Forexample,HTC’sAndroidHerohasplentyofWidgets.AsfortheViewGroup,itisaabstractclassinformofkindsoflayout,evenitconcludesitself.Besides,thereisnoneedforView’sconstructionfunctionstobecalledintheActivityclass,however,Displayableisundiposable.IntheActivity,acquiringViewfromXMLshouldbythemeansoffindViewByld(),soistheViewclassinAndroidsystem.Viewandeventdependuponeachother,andconnecttogetherthroughListener,sothateachViewisabletoregisteraeventlistener.Forinstance,whenViewisgoingtodealwiththeusers’touchevent,itshouldregisteraView.OnClickListenerinAndroidframework.AlsoasImageequalstoBitMapinJ2ME.

2、IntroductiontoWi-Fi

Wi-FiisshortforwirelessfidelityinwirelessLAN.ItisawirelessnetworkconsistsofAP(AccessPoint)andwirelessNIC.AP,socallednetworkbridgeoraccesspoint,isregaredasabridgebetweentraditionalwireLAN.Asaresult,anyPCwithNICcansharetheresourceofwireLAN,evenInternetthroughAP.ItislikeaHUBhasawirelesstransmitterinside,ontheotherhand,NICisaCLIENTequipmentforreceivingthesignalssendbyAP.

Inthepasttwoyears,themarketstartedtosupportUMA(UmlicensedMobileAccess),etc.TheremergesmoreandmoresmartphoneshavingWLAN,whichcansharethePCtoInternetorVoIPtocallwiththeWi-Ficovering,apartfromthemobiletelecommunicationnetworkcallsundertheGSM/CDMA.Nowadays,anincreasingnumberofpeoplechoosetosurfonInternetbywirelessrouteorwirelessAP.Bythemeansofmentionedmethods,PCcaneasilyconnecttotheInternetusingADSL,Cable,FTTX,etc.

Wi-Fiownsalargescalecovering,fasttransferspeedandeasytoimplement.Nevertheless,italsohasitslimitation.WhenweneedtomakeaconnectionbetweenPCandcellphone,ortwomobilephones,itisnecessaytoacquireatransferringpointlikeAPorHUB,etc.Luckily,Ad-hocmakesithappen.

TypicalconstructionofWi-fi

3、IntroductiontoAd-hoc

Ad-hoc(pointtopoint)Model,thesamewiththeStraightTwistedPair,isP2Panditfailstocommunicatewithothernetworks.Thatistosay,buildingaspecialwirelessnetworkwithoutAPsothatPCscouldconnecttotheNICandsharetheresources.

Usually,wirelessterminalequipments,suchasPMP,PSP,DMA,areusingAd-hoc.InthefamilywirelessLAN,itisknowntoallthattwoPCssharingtheInternetwhentheyachievetheconnectionbyNIC.Ad-hocisasymmetrynetworkframeworkwithoutwirelessAP.WheneverinstallaNIC,PCscanimmediatelyconnecttogether.

4、AddtheAd-hoctoWi-FiintheAndroidSystem

Recently,AndroidsystemdoesnotsupporttheAd-hoc,thatiswhywehavetoaddAd-hoctoWi-Fiservicesmanually,sodoestheChannelsupport.

Atthefirstplace,weshouldgetthesuperuser(su)loginthroughtheHyperTerminalinthePC.Next,modifyingtheWi-FiAd-hocavailblemeanschangingtheWi-FiAd-hoc=0toWi-FiAd-hoc=1,underthepathof/system/etc/wifi/tiwlan.ini.Atthemeantime,addingthefunctiondescribe:dot11DesiredSSID=AndroidMobile；dot11DesiredBSSType=0.

Then,manuallyaddAd-hocpoint,modify/data/misc/wifi/wpa_supplicant.conf

network={

ssid="AndroidAdhoc"

key_mgmt=NONE

mode=1

}

PS:'mode=1'referstoAd-hocnetwork

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III

．Plan

week1~week2:Readingtherelevantarticlessoastobefamiliarwiththet