軟件工程專業(yè)英語-Mobile Computers

我們畢業(yè)啦其實是答辯的標(biāo)題地方軟件工程專業(yè)英語SOFTWAREENGINEERINGESSENTIALSCourseOutlineCourseArrangement:32HoursLectures2CreditsTotalScore40%Assignment&Attendences&inclassquiz+60%FinalExaminationLecturesRange:

Chapter1——Chapter8CourseRequirements:

readingandcomprehension

InClassQuiz:Fourtimes,andOncetwoweeks.

Chapter1 MobileComputers

Chapter2 SoftwareReengineering

Chapter3

MainMemoryDatabase

Chapter4 NetworkingAndSecurity

Chapter5 ArtificialIntelligence

Chapter6 BigData

Chapter7 MobileInternet

Chapter8

InternetofThings

2023/10/2132023/10/212023/10/21太原理工大學(xué).計算機科學(xué)與技術(shù)學(xué)院.軟件學(xué)院41.1

ANOVERVIEWOFMOBILE

COMPUTERS1.2SMARTPHONES1.3ANDROIDOPERATINGSYSTEMTERMSCHPTER1

MOBILECOMPUTERS2023/10/21COMPETENCIESAfterreadingthischapter,youshouldbeableto:1.Describethetypesandthefeaturesofmobilecomputers.2.Describethedifferenttypesofmobileoperatingsystems.3.DistinguishbetweenmobileoperatingsystemsandmobileApps.4.Explainthetwotypesofsmartphones.4.DescribeARMarchitectureandAndroidarchitecture.5.IdentifythefourlayersofAndroidarchitecture.6.DiscussAndroidAppStore:GooglePlay.2023/10/2152023/10/212023/10/21太原理工大學(xué).計算機科學(xué)與技術(shù)學(xué)院.軟件學(xué)院61.2SMARTPHONES

Themostdramaticchangeincomputertechnologyinthepastfiveyearshasbeenthewidespreaduseofmobilecomputers,suchastabletsandsmartphones.Manyexpertspredictthattheapplicationofthesemobilecomputershasjustbegun.Mobilecomputersareexpectedtogreatlyaffectthewaywecommunicateandusecomputertechnology.2023/10/212023/10/21太原理工大學(xué).計算機科學(xué)與技術(shù)學(xué)院.軟件學(xué)院71.2SMARTPHONESInthischapter,wepresentanoverviewofmobilecomputers,includingtheirtypes,features,CPUarchitectures,operatingsystems,andApps.Itisessentialtounderstandthesebasicconcepts.Also,wedescribesmartphones,themostpopularmobilecomputingdevicesindetail,likeiPhoneandAndroidphones.Lastly,wediscussthemostwidelyusedmobileoperatingsystem,AndroidOS,includingitsorigin,architecture,andAppstore.2023/10/212023/10/21太原理工大學(xué).計算機科學(xué)與技術(shù)學(xué)院.軟件學(xué)院81.1ANOVERVIEWOF MOBILECOMPUTERS2023/10/211.1ANOVERVIEWOFMOBILECOMPUTERSAmobilecomputer,alsoknownasamobilecomputingdevice,isdescribedasasmall,lightweight,portablecomputercontainingwirelessInternetaccess.AmobiledevicewithoutInternetaccessisnotgenerallyreferredtoasamobilecomputingdevice.2023/10/2192023/10/21

1.1.1TypesofMobileComputers

Thereareseveraltypesofmobilecomputingdevices:

NotebookcomputersTabletcomputersHand-heldcomputersSmartphonesPhabletsApplication-specificmobilecomputersDevicesthatareportable,butusedwhilestationary,suchasnotebooks,aresometimesremovedfromthegroupofmobilecomputingdevicesastheycannotbeusedwhileinmotion.2023/10/21102023/10/21Notebookcomputers,Alsocalledlaptopsorshorteningnotebooks,aresmallpersonalcomputersdesignedforportability.Usually,allofthehardwareandinterfacesneededtooperateonenotebook,suchasthegraphicscard,audiodevicesand

USBports,arebuiltintoasingleunit.Intheinterestsofsavingpower,weightandspace,alaptopgraphicscardisinmanycasesintegratedintotheCPUorchipsetandusesystemRAM,resultinginreducedgraphicsperformancewhencomparedtoanequivalentdesktopcomputer.2023/10/21112023/10/21Atablet

AtypeofportablePCsthatde-emphasizestheuseoftraditionalinputdevices，suchasamouse

or

akeyboard,byusingatouchscreen

display,whichcanbecontrolledbyeitherastyluspenorfingers.Sometabletsmayusea"hybrid"or"convertible"design,offeringakeyboardthatcaneitherberemovedasanattachment,orascreenthatcanberotatedandfoldeddirectlyovertopofthekeyboard.2023/10/21122023/10/21HandheldcomputersAlsoknownaspalmcomputers,aredesignedasverysmalldevicestofitintothepalmofonehandTypicallycombinepeninput,writingrecognition,personalorganizationaltools,andcommunicationscapabilities.

Personaldigitalassistants(PDAs)arethemostwidelyusedhandheldcomputers.PDAsruntheMicrosoft

WindowsMobile

operatingsystemandanalternative

operatingsystemlikeLinux.2023/10/21132023/10/21AsmartphoneIsa

mobilephone

withanadvanced

mobileoperatingsystem

whichcombinesfeaturesofa

personalcomputer

operatingsystemwithotherfeaturesusefulformobileandhandhelduses.Ittypicallycombinesthefeaturesofacellphonewiththoseofotherpopular

mobiledevices,suchas

apersonaldigitalassistant

(PDA),

amediaplayer

and

aGPSnavigationunit.2023/10/21142023/10/21A

phablet

Isatypeofmobiledevicesdesignedtocombineorstraddletheformofa

smartphone

anda

tablet.Aphablethasascreenthatmeasures

diagonally

5.3–6.99inches(135–178

mm),

asizethatcomplementsscreen-intensiveactivitiessuchas

mobilewebbrowsing

and

multimedia

viewing.

In2014,notingthatphabletshadovertakenlaptopsanddesktopsinglobalsales,

TheNewYorkTimes

said"Phabletscouldbecomethedominantcomputingdeviceofthefuture—themostpopularkindofphoneonthemarket,andperhapstheonlycomputermanyofusneed."2023/10/21152023/10/21Application-specificmobilecomputers

Portabledataterminals(PDTs):Electronicdevicesareusedtoenterorretrievedataviawirelesstransmission(WLAN

or

WWAN).Theycanalsoserveas

barcodereadersinlargestores,orbeusedinwarehouses,hospitals,orinthefieldtoaccessa

database

fromaremotelocation.Wearablecomputers,alsoknownas

body-bornecomputersorwearables,areminiatureelectronicdevicesthatarewornbythebearerunder,withorontopofclothing.

Modernexamplewillbethe

Nike

systemwhichallowsyoutotrackyourtime,distance,paceandcaloriesviaasensorintheshoe.Carputers

or

carPCs

are

tablet

computersdesignedormodifiedspecificallytobeinstalledandrunincars,whichincludeusefultechnologieslike

GPS

and

Bluetooth.2023/10/21162023/10/211.1.2FeaturesofMobileComputers

Portability:Anymobiledeviceshouldfunctionandoperateconsistentlywhileonthemove,regardlessofproximitytoapowersourceorphysicalInternetconnectionSmallSize:Atypicalmobiledevicewillfitintheaverageadult'shandorpocket.Somemobiledevicesmayfoldorslidefromacompact,portablemodetoaslightlylargersize,revealingbuilt-inkeyboardsorlargerscreens.WirelessCommunication:Typicallycapableofcommunicationwithothersimilardevices,withstationarycomputersandsystems,withnetworksandportablephonesTouchInterface:Touchinputallowstheusertonavigateeasilyandtypewitha

virtualkeyboard

onthescreen.2023/10/21172023/10/211.1.3CPUArchitecturesofMobileComputersTwomajorCPUarchitecturesthatdominatethemobilecomputersmarketareARMHoldings'

ARMarchitecture

andIntel'sx86architecture.ASamsung1GHzARMCORTEX-A8processorandanIntelx86processor2023/10/21182023/10/211.Intel'sx86architectureIncluding

x86-64,

haspoweredtheIBManditscompatiblePCssince1981andApple'sMacintoshcomputerssince2006.TheCPUarchitecturehasbeenincorporatedintotabletPCsovertheyearsandgenerallyoffersgreaterperformancealongwiththeabilitytorunfullversionsofMicrosoft

Windows,includingWindowsdesktopandenterpriseapplications.Intelannouncedplanstoenterthetabletmarketwithits

Atom

in2010.

InOctober2013,Intel'sfoundryoperationannouncedplanstobuildFPGA-basedquadcoresforARMandx86processors.2023/10/21192023/10/21

2.ARMarchitectureARMhasbeenchosenastheCPUarchitecturebymanufacturersofsmartphones(95%ARM),PDAs,digitalcameras(80%ARM),

set-topboxes,DSLrouters,smarttelevisions(70%ARM)andtabletcomputers(95%ARM).Thisdominancebeganwiththereleaseofthemobile-focusedandcomparativelypower-efficient32-bitARM610processororiginallydesignedforthe

AppleNewton（Apple’sPDA）

andAcornA4(a

laptop

computercalledA4isintroducedbyAcorn)in1993.ThechipwasadoptedbyPsion,PalmandNokiaforPDAsandlatersmartphones,cameraphones,cameras,etc.2023/10/21202023/10/211.1.4MobileOperatingSystemsIsanoperatingsystem(OS)forsmartphones,tablets,PDAs,orothermobiledevices.Whilecomputerssuchasthetypicallaptoparemobile,theoperatingsystemsusuallyusedonthemarenotconsideredmobileonesastheywereoriginallydesignedforbiggerstationarydesktopcomputersthathistoricallydidnothaveorneedspecific"mobile"features.Thisdistinctionisgettingblurredinsomeneweroperatingsystemsthatarehybridsmadeforbothuses.2023/10/21212023/10/21Mobileoperatingsystemscombinefeaturesofapersonalcomputeroperatingsystemwithotherfeaturesusefulformobileorhandhelduse,usuallyincludingtouchscreen,cellular,Bluetooth,Wi-Fi,GPSmobilenavigation,camera,videocamera,speechrecognition,voicerecorder,musicplayer,nearfieldcommunicationandinfraredblaster,mostofwhichareconsideredessentialinmodernmobilesystems.ThepopularmobileOSincluse:

1.AndroidOS: 2.iOS 3.WindowsPhone4.BlackBerry2023/10/21222023/10/211.AndroidOSIsa

OScurrentlydevelopedby

Google,andbasedonthe

Linuxkernel

anddesignedprimarilyfor

touchscreen

mobiledevicessuchassmartphonesand

tablets.TherearemanyworldwidecompaniesthatuseAndroidOSfortheirmobiledevices,forexample,Samsung’sGalaxy

productsinSouthKorea,HuaweiandXiaomi’sinChinaandmanymoreotherbrandsintheworld.AndroidOSisthemostpopularoperatingsystemformobilecomputers,andsharesmorethan50%worldwidemarket,whileAndroidiscurrentlynotpopularforregularPCs.Androidis

freeandopen-sourcesoftware,

andalargeamountofproprietarysoftware

isbundledwithit,suchasGooglePlayStore,GoogleSearch,GooglePlayServices,GoogleMusic,andsoon.2023/10/21232023/10/212.iOSIsfrom

AppleInc.andhasthesecondlargestinstalledbaseworldwideonsmartphones,butthelargestprofits,duetoaggressivepricecompetitionbetweenAndroid-basedmanufacturers.

Itisclosedsourceandproprietaryandbuiltonopensource

Darwin

coreOS.TheApple

iPhone,

iPodTouch,

iPad

andsecond-generationof

AppleTV

alluse

iOS,whichisderivedfrom

Apple’sdesktopPC’sOSX.NativethirdpartyapplicationswerenotofficiallysupporteduntilthereleaseofiOS2.0in2008.Beforethis,"jailbreaking"allowedthirdpartyapplicationstobeinstalled,andthismethodisstillavailable.2023/10/21242023/10/213.WindowsPhoneWindowsPhone(WP)isafamilyofmobileoperatingsystemsdevelopedbyMicrosoftforsmartphonesasthereplacementsuccessortoWindowsMobile.UnlikeWindowsMobile,itisprimarilyaimedattheconsumermarketratherthantheenterprisemarket.WindowsPhone

isclosedsourceandproprietary,andithasthirdlargestinstalledbaseonsmartphonesbehindAndroidandiOS.WindowsPhonedevicesaremadeprimarilyby

Nokia,alongwith

HTC,

andSamsung.2023/10/21252023/10/214.BlackBerryBlackBerry10

isamobileoperatingsystemfromBlackBerry.Itisclosedsourceandproprietary.Itisusedmostlybygovernmentemployees.AllphonesandtabletsaremanufacturedbyBlackberryitself.Onceoneofthedominantplatformsintheworld,itsglobalmarketsharehadbeenreducedto0.4%bytheendof2014.2023/10/21262023/10/211.1.5MobileAppsTheterm"app"isashorteningoftheterm"applicationsoftware"andnowithasbecomeverypopular.In2009,technologycolumnist

DavidPogue

saidthatnewersmartphonescouldbenicknamed"appphones"todistinguishthemfromearlierless-sophisticatedsmartphones.In2010theterm"app"waslistedas"WordoftheYear"bythe

AmericanDialectSociety.2023/10/21272023/10/212023/10/21281.Whatarethesixtypesofmobilecomputersandthefourfeaturesofmobilecomputers?2.Describethreetypesofapplication-specificcomputers.3.DescribetheCPUarchitecturesofmobilecomputers.4.Definemobileoperatingsystem.5.Listfourcommontypesofmobileoperatingsystems.6.WhatareApps?7.DescribemobileApps.CONCEPTS2023/10/212023/10/21291.2SMARTPHONES2023/10/211.2SMARTPHONESNowadays,billionsofpeoplearoundtheworldusesmartphonesandphablets,andmanyofthemarechildren.ThegreatadvantageofSmartphonesisthatthephoneprovidesmanytoolsinasingle,readilyavailable,andrelativelyinexpensivepackage.

In2014,salesofsmartphonesworldwidetopped1.2billion,whichwasup28%from2013.InQ12015intheUS,Androidmarketsharewas53.2%;Apple'siPhonehada41.3%shareandSamsung'sAndroidsmartphoneshad29.3%.2023/10/21302023/10/211.2.1FunctionsHigh-endsmartphonesaresophisticateddevicesthatcombinetherevolutionaryMulti-Touchtechnologywithpowerfulfunctions:GPS:

GlobalPositioningSystemWi-Fi:A

localareawirelesscomputernetworking

technologyBluetooth:StandardforexchangingdataovershortdistancesProcessors:CPUAccelerometers:Gyroscopes:2023/10/21312023/10/21Multi-touchinterfaceIt

isatechnologythatenablesasurface(touchscreen)torecognizethepresenceofmorethanone

pointofcontact

withthesurface.Thesurfaceusuallyfillsalmosttheentirephonesurface.Thescreensizeusuallydefinesthesizeofasmartphone,whoseaspectratio

isnormally4:3

or

16:9.Itismeasuredindiagonal

inches,startingfrom2.45inches.2023/10/21322023/10/21SystemonChip

(SoC)

Isan

integratedcircuit

(IC)thatintegratesallcomponentsofa

computer

orother

electronic

systemintoasinglechip.

Amulti-coreprocessorisasingle

computing

componentwithtwoormoreindependentactual

processingunits

called"cores”.

A

graphicsprocessingunit

(GPUIsaspecialized

processor.Itisdesignedtorapidlymanipulateandaltermemorytoacceleratethecreationofimagesina

framebuffer

intendedforoutputtoadisplay.

Amotionco-processor:Cancollect,process,andstoresensordatafromintegrated

accelerometers,gyroscopes,compasses,andenablesapplicationstobeawareofwhattypeofmovementtheuserisexperiencing.2023/10/21332023/10/211.2.2iPhoneiPhoneisalineofsmartphonesdesignedandmarketedbyAppleInc.andrunsApple'siOSmobileoperatingsystemTheiPhonewasnotableforitsuseofalargetouchscreenfordirectfingerinputasitsmainmeansofinteraction,insteadofastylus,keyboard,orkeypadtypicalforsmartphonesatthetime.ThefirstgenerationofiPhone

featuresa3.5-inchtouchscreendisplay,Bluetoothand

Wi-Fi,anditincludesweb-based

Dashboard

appssuchas

GoogleMaps

and

Weather.Therearenine

generations

ofiPhonemodels,eachaccompaniedbyoneoftheninemajorreleasesof

iOS.2023/10/21342023/10/21The

iPhone6

and

iPhone6PlusAre

relativelynewmodelsofthe

iPhoneseries,

andjointlyserveasthesuccessorstothe

iPhone5S

and

iPhone5C.The

twomodelsincludeanumberofchangesoveritspredecessor,includingafasterprocessor,upgradedcameras,improvedLTEandWi-Ficonnectivity.2023/10/21352023/10/21iPhone6sandiPhone6sPlusThenewestiPhonemodelswereunveiledonSeptember9,2015inBeijingChina.The3Dtouchisthemainchangeforthem.2023/10/21362023/10/211.iPhone6ThedesignofiPhone6isinfluencedbythatofthe

iPadAir,withaglassfrontthatiscurvedaroundtheedgesofthedisplay,andanaluminumrearthatcontainstwoplasticstripsfortheantenna.

Themodelcomesingold,silver,and"spacegray"finishes.TheiPhone6hasathicknessof6.9mmandisthinnerthaniPhone5SandiPhone5C,beingApple'sthinnestphonetodate.ThemostsignificantchangetotheiPhone6isitsdisplaysbrandedas"RetinaHDDisplay"and"ion-strengthened".TheiPhone6’sbatteryis1810

mAh.2023/10/21372023/10/21ThedisplayItusesamultiple-domainLCDpanel,called"dual-domainpixels";theRGBpixelsthemselvesareskewedinpattern,sothateverypixelisseenfromadifferentangle.Thistechniquehelpsimprovetheviewinganglesofthedisplay.Thedisplayis4.7inchesinsizewitha

16:9

aspectratioandresolutionof1334x750.2023/10/21Itincludesanew

sensor

whichislikethecameraintheiPhone5S,andithas1.5micronpixels,anf/2.2aperturelens,andtheabilitytoshoot1080pvideoateither30or60framespersecond.Thecameraalsoincludes

phasedetectionautofocus.

Itcanalsorecordslow-motionvideoateither120or240framespersecond.Therear-facingcamera382023/10/21ProcessoriPhone6hasaDual-core1.4

GHzCycloneProcessor(ARMv8-based).Themodelincludesan

AppleA8

system-on-chip,andan

M8

motionco-processor—anupdateofthe

M7

chipfromtheiPhone5S.ThemaindifferencebetweentheM8andtheoriginalM7coprocessoristhattheM8alsoincludesabarometertomeasurealtitudechanges.

TheA8chipwouldprovide,incomparisontothe5S,a25%increaseinCPUperformance,a50%increaseingraphicsperformance,andlessheatoutput.2023/10/21392023/10/212.iOS9iOS9

isthe

ninth

releaseofthe

iOS

mobileoperatingsystem

designedby

AppleInc

whichisthesuccessorto

iOS8.iOS9focuseslessonnewfeaturesandmoreonunder-the-hoodoptimization,aswellasbatteryimprovement.iOS9canbeusediniPhone4sorlateriPhonemodes.Somecommon

featuresofiOS9include:PhotosandCameraNotificationCenterMassages,KeyboardsFamilySharingand2023/10/21402023/10/21PhotosandCameraWithiPhone,youcantakestillphotos,live

photos,andHDvideos.Therearetwocameras—inadditiontotheiSightcameraonthebackofiPhone,there’sacamerainthefrontthatyoucanuseforFaceTimecallsandselfies.Thephotosappcontainsmoretoolsforeditingphotos.Thecroppingfeaturenowenablesrotatingimagesbothclockwiseandcounter-clockwise.Furthermore,userscansetthedesiredbrightnessandcolorsforphotos.TheCameraappnowfeaturesashottimerforthefrontcamera,whichcanbesetto3or10seconds.2023/10/21412023/10/21NotificationCenterItcollectsyournotificationsinoneplace,soyoucanreviewthemwheneveryouareready.Viewdetailsaboutyourday—suchastheweatherforecast,appointments,birthdays,stockquotes,andevenaquicksummaryofwhatiscominguptomorrow.TaptheNotificationstabtoreviewallyouralerts.Draggingdownfromthetopedgeofthescreen,youcanopenNotificationCenter.2023/10/21422023/10/21MessagesItenablesyoutoexchangetextmessageswithotherSMSandMMSdevicesusingyourcellularconnection,orwithotheriOSdevicesandMaccomputersusingiMessage.iMessageisanApplefeaturethatletsyousendmessagesoverWi-Fi(orcellularconnections)toothersusingiOS

5orlater,orOS

XMountainLionorlater.MessagesyousendusingiMessagedon’tcountagainstyourtextmessagingplanwithyourcarrier.Messagescanincludephotos,videos,andotherinformation.Youcanseewhenotherpeoplearetyping,andletthemknowwhenyouhavereadtheirmessages.2023/10/21432023/10/21KeyboardsItincludesanewpredictivetypingfeaturecalledQuickType,whichdisplayswordselectionsabovethekeyboardasonetypes.ThefeaturecanbeturnedoffinSettings,orhiddenusingaswipegesture.Additionally,itallowsuserstoinstallthird-partykeyboards.

ManydevelopershaveportedtheirkeyboardstoiOS.2023/10/21FamilySharingAusercanaddfiveothersasfamilymemberswhichcansharepurchasedapps,music,movies,TVshows,andbooksusingthesamecreditcard.Theycanalsosyncphotostreams,calendarsandtheirlocationhistorywitheachother.

Onecansend

iTunes

downloadrequeststoanotheraccountforapprovaliftheuserissignedupasachild.442023/10/21OthersiCloudDrive:

IsApple's

filehostingservice

fordevicesrunningiOS.Userscansavephotos,videos,documents,musicandapplicationdatatoiCloud.

HealthKit:IsaservicethatallowsdeveloperstomakesoftwarethatintegrateswiththenewHealthapplication.Thisapplicationallowsuserstotracktheirsteps,oxygen,sleeplevels,andotherhealthrelateddata.HomeKit:WithHomeKit,youcanuseiPhonetocontrolany“WorkswithAppleHomeKit”accessorythatyouhaveinyourhome,suchaslights,locks,thermostats,smartplugs,andsoon.2023/10/21452023/10/211.2.3AndroidPhonesRefertothesmartphonesusingAndroidOS.Theysharethelargestworldwidemarket,including:SamsungGalaxysmartphonesHuaweismartphonesXiaomsmartphonesAccordingtoIDC(InternationalDataCorporation),Samsungremainsatthefirstplacedespitedecliningshipmentvolume,followedby

AppleInc.

atsecondplace.Xiaomiisnowthethirdlargestsmartphonemakerintheworld.

2023/10/21462023/10/211.SamsungGalaxy

SamsungGalaxy

isaseriesof

Android-powered

mobilecomputingdevicesdesigned,manufacturedandmarketedby

SamsungElectronics.Theproductlineincludes:The

GalaxySseries

ofhigh-end

smartphones;The

GalaxyTabseries

of

tablets;The

GalaxyNoteseries

oftabletsand

phablets;

2023/10/21472023/10/212023/10/214812GalaxySseriesreferstotheflagship

Android

smartphones

intheSamsungGalaxy

series.ThenewestmodelGalaxyS6smartphoneswerereleasedonApril10,2015in20countries.AlongsidetheS6,SamsungalsounveiledtheS6Edge.SamsungGalaxyNoteisaseriesof

Android-basedhigh-end

tabletsandphablets.AllGalaxyNotemodelsshipwitha

styluspen

andincorporateapressure-sensitive

Wacom

digitizerandalsoincludesoftwarefeatures,suchas

note-taking

and

digitalscrapbooking

apps,andsplit-screenmultitasking.TheGalaxyNote4,thenewmodelintroducedanewdesignwitha

plasticleather

backingandmetalframe,a5.7-inchQHDdisplay,a16MPcamerawith

OIS,animprovedS-Pen,anupgradeddigitizerwith2,048levelsofpressuresensitivityandexpandedfunctionality,afingerprintscanner,andotherfeaturestakenfromthe

GalaxyS5.2023/10/212.

HuaweiSmartphonesHuaweiTechnologiesCo.Ltd.

isaChinese

multinational

networkingand

telecommunicationsequipmentandservicescompanyheadquarteredin

Shenzhen,

Guangdong.

Itisthelargesttelecommunicationsequipmentmakerintheworld,havingovertaken

Ericsson

in2012.Huawei'sDevicesdivisionprovides

white-labelproducts

tocontent-serviceproviders,including

USBmodems,

wirelessmodems

and

wirelessrouters.

Huaweialsoproducesandsellsavarietyofdevicesunderitsownname,suchastheIDEOS

smartphones,

tabletPCs

and

HuaWeiSmartwatch

.2023/10/21492023/10/21

HuaweiP8

andHuaweiP8MaxTwohigh-endAndroidsmartphones.Itskeyfeaturesinclude:OptionalDualSim,2680mAhbatteryandAndroidOSv5.0Lollipop,EmotionUI3.1.5.2"1080pIPS-NEOLCD(424ppi)capacitivetouchscreenwithGorillaGlass3.HuaweiHiSiliconKirin930chipset-quad-core2GHzCortex-A53&quad-core1.5GHzCortex-A53,Mali-T628MP4GPU;3GBofRAM;13MPautofocuscamerawithdual-toneLEDflash,RBGWsensorandF/2.0aperture,1080pvideorecording,someuniquecameramodessuchasLightTrailsandLightPainting8MPfront-facingcamera,1080pvideorecording,selfiepanoramamode16GB/64GBofbuilt-instorage;microSDcardslot,doublingasasecondarySIMslotontheDualSIMmodelDual-bandWi-Fi;Bluetooth4.1;GPS/GLONASS/BeiDou(BDS);FMradio;NFC;microUSBportwithUSBOn-The-Go2023/10/21502023/10/213.XiaomiSmartphonesXiaomi

Inc.,theworld's4th

largestsmartphonedistributor,isaprivatelyowned

Chineseelectronics

companyheadquarteredinBeijing,China.Xiaomidesigns,develops,andsells

smartphones,

mobileapps,and

consumerelectronics.

Thecompany'sfounderandCEOis

LeiJun,China's23rdrichestpersonaccordingto

Forbes.AttheendofDecember2014,Xiaomibecametheworld’smostvaluabletechnologystart-upafteritreceivedUS$1.1billionfundingfrominvestors,makingXiaomi'svaluationmorethanUS$46billion.2023/10/21512023/10/212023/10/2152123Miseriesis

Xiaomi'sflagshipmobilehandsetline.Thenewestmodelinthislineisthe

XiaomiMi4.AnnouncedatXiaomi'sannualproductlaunchinBeijingonJuly22,2014.

XiaomiMi4

featuresaQualcommSnapdragon801,3GBRAM,8Megapixelfrontcamera,andafurtheroptimizedphoneexterior.RedmiseriesincludetheRedmi1,Redmi1SandRedmiNote.RedmiNoteisaphabletandthesecondsmartphoneintheRedmiSeries.EarlierXiaomiusedtosellexclusivelythroughhighlysuccessfulflashsaleson

Flipkart.

ThefirstflashsaleoftheRedmiNotewasheldonDecember2,2014,andall50,000unitsinstockweresoldinamere6seconds.MiNote,MiNotePro

wereunveiledinJanuary2015,Xiaomi’snewflagshipphones

torival

iPhone6

atalmosthalftheprice.

Bothdevicesfeature5.7-inchdisplayanduseadual-glassdesignwitha2.5Dfrontand3Drearglass.2023/10/212023/10/2153CONCEPTS1.DescribethefeaturesofiPhone6.2.DescribethecommonfeaturesofiOS93.DescribethreetypesofAndroidsmartphones.4.DescribeSamsungGalaxyNote.5.DescribetheRedmiSeriesofsmartphones.2023/10/212023/10/21541.3ANDROIDOPERATINGSYSTEM2023/10/211.3ANDROIDOPERATINGSYSTEMAndroid

isan

operatingsystem

formobiledevicesandisdesignedprimarilyfor

touchscreen

mobiledevicessuchas

smartphones

and

tabletcomputers,withspecificallydesigneduserinterfacesfortelevisions(AndroidTV),cars(AndroidAuto),andwristwatches(AndroidWear).TheOSusestouchinputthatlooselycorrespondstoreal-worldactions,liketapping,dragging,swipingandpinching2023/10/21552023/10/211.3.1TheOriginofAndroidInOctober2003,AndroidInc.wasfoundedin

California,USA.Theearlyintentionsofthecompanyweretodevelopanadvancedoperatingsystemfor

digitalcameras.Becausethemarketwasnotlargeenough,thecompanydiverteditseffortstowardproducingasmartphoneoperatingsystem.InJuly2005,

Google

acquiredAndroidInc.foratleast$50million,whosekeyemployees,includingRubin,MinerandWhite,stayedatthecompanyaftertheacquisition.

InNovember2007,theOpenHandsetAlliance(OHA),includingGoogle,devicemanufacturers,wirelesscarriers,andchipsetmakersunveileditself,withagoaltodevelop

openstandards

formobiledevices.

2023/10/21562023/10