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1、Android™AProgrammer’sGuideJ.F.DiMarzioNewYorkChicagoSanFranciscoLisbonLondonMadridMexicoCityMilanNewDelhiSanJuanSeoulSingaporeSydneyTorontoAbouttheAuthorJ.F.DiMarzioisadeveloperwithover15yearsofexperienceinnetworkingandapplicationdevelopmentandistheauthorofse
2、venbooksoncomputingtechnologies.HehasbecomealeadingresourceinthefieldsofITconsultinganddevelopment.HelivesinCentralFlorida.AbouttheTechnicalEditorGilbertL.Poloisasoftwaredeveloperwithover20yearsofexperienceworkinginthetelecommunications,financial,and,mostrece
3、ntly,educationalindustries.HehasprogrammedinvariouslanguagesincludingC,C++,Java,andC#.Chapter1WhatIsAndroid?KeySkills&ConceptslHistoryofembeddeddeviceprogramminglExplanationofOpenHandsetAlliancelFirstlookattheAndroidhomescreenItcanbesaidthat,forawhile,traditi
4、onaldesktopapplicationdevelopershavebeenspoiled.Thisisnottosaythattraditionaldesktopapplicationdevelopmentiseasierthanotherformsofdevelopment.However,astraditionaldesktopapplicationdevelopers,wehavehadtheabilitytocreatealmostanykindofapplicationwecanimagine.I
5、amincludingmyselfinthisgroupingbecauseIgotmystartindesktopprogramming.Oneaspectthathasmadedesktopprogrammingmoreaccessibleisthatwehavehadtheabilitytointeractwiththedesktopoperatingsystem,andthusinteractwithanyunderlyinghardware,prettyfreely(oratleastwithminim
6、alexceptions).Thiskindoffreedomtoprogramindependently,however,hasneverreallybeenavailabletothesmallgroupofprogrammerswhodaredtoventureintothemurkywatersofcellphonedevelopment.NOTEIrefertotwodifferentkindsofdevelopersinthisdiscussion:traditionaldesktopapplicat
7、iondevelopers,whoworkinalmostanylanguageandwhoseendproduct,applications,arebuilttorunonany“desktop”operatingsystem;andAndroiddevelopers,JavadeveloperswhodevelopfortheAndroidplatform.Thisisnotforthepurposesofsayingoneisbyanymeansbetterorworsethantheother.Rathe
8、r,thedistinctionismadeforpurposesofcomparingthedevelopmentstylesandtoolsofdesktopoperatingsystemenvironmentstothemobileoperatingsystemenvironment,Android.BriefHistoryofEmbeddedDeviceProgr