Peb npaj koj qhov kev pom! Kev ua tau zoo nrog ONMA scout android app kev txhim kho yog lav.
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Yog tias koj tab tom nrhiav rau Android app programming chav kawm, Koj yuav tsum xav txog kev saib ntawm Android Programming for Beginners series. Chav kawm peb phau ntawv no yuav qhia koj Java, Object-Oriented Programming, kev ua si programming, thiab JSON-Data los ntawm internet. Nws tseem yuav pab koj nkag siab txog ntau hom apps muaj rau Android. Yog xav paub ntxiv, saib Android Programming for Beginners: Cov Ntsiab Lus
Native mobile apps (NMAs) yog cov ntawv sau ua lus txhawb nqa los ntawm tus neeg muag khoom OS. Native apps muab ib qho kev paub intuitive incredibly. Cov neeg tsim tawm tuaj yeem siv SDKs ib txwm muaj, uas yog tshwj xeeb tailored rau lub ntaus ntawv platform, los tsim cov apps uas xav tias zoo li ib feem ntawm cov cuab yeej sib cais. Tab sis, haiv apps yog kim dua los tsim, thiab lawv tau khi rau ib qho khoom siv OS tus muag khoom. Vim li no, Feem ntau ntawm cov yeeb yaj kiab ua si rau cov khoom siv mobile yog cov apps ib txwm muaj.
Txawm hais tias qee qhov ntawm cov yam ntxwv uas muaj nyob rau hauv daim ntawv thov ib txwm tsis muaj nyob hauv lub vev xaib mobile app, qhov no tsis txhais hais tias koj tsis tuaj yeem sau cov ntawv thov tsis yog haiv neeg rau lub platform mobile. Tsim ib haiv neeg daim ntawv thov mobile yog yooj yim dua puas tau, ua tsaug rau cov cuab yeej xws li Xamarin MonoTouch thiab Appcelerator Titanium.
Ib qho txiaj ntsig tseem ceeb ntawm kev tsim ib haiv neeg app yog nws txoj kev txav mus los. Tsis zoo li web applications, haiv apps yog platform tshwj xeeb. Qhov no txhais tau hais tias txoj kev txhim kho yuav nrawm dua, thiab koj tuaj yeem siv cov yam ntxwv siab dua. Cov ntawv thov mobile hauv haiv neeg kuj tau sau ua hom lus thiab ib puag ncig kev txhim kho uas tau txais kev txhawb nqa los ntawm tus neeg muag khoom OS. Thaum Java yog cov lus programming nrov tshaj plaws rau kev tsim kho mobile app, Kotlin tau txais koob meej raws li qhov kev xaiv zoo rau cov neeg tsim khoom.
Android yog ib tug dav-siv mobile operating system. Nws yog tsim los ntawm Google thiab txhawb nqa los ntawm nws cov Nexus thiab Pixel hom. Ntau lub tuam txhab tsim cov khoom siv Android. Qee tus ntawm lawv siv CyanogenMod thiab MIUI. Kuj tseem muaj ntau yam sib txawv thiab qhov ntau thiab tsawg los xaiv. Yog li, qhov twg yog qhov tsim nyog rau koj? Vam tias, kab lus no yuav pab koj txiav txim siab.
Native mobile apps yog hloov tau yooj yim dua thiab tuaj yeem hloov kho rau cov kev hloov pauv thiab tawm tswv yim los ntawm cov neeg siv. Ntxiv thiab, haiv neeg mobile apps tuaj yeem hloov kho los ntxiv cov yam ntxwv tshiab raws li kev lag luam kev lag luam thiab kev nce qib thev naus laus zis. Native apps kuj muab lub platform rau kev txhim kho txuas ntxiv, cia koj txoj kev lag luam loj hlob tuaj. Thiab, lawv tuaj yeem pab koj ua ntej ntawm kev sib tw. Nrog txoj hauv kev zoo, koj haiv neeg mobile apps tuaj yeem ua tiav!
Qhov tsis zoo ntawm cross-platform apps yog tsawg dua, tab sis lawv tuaj yeem ua rau nyuaj. Txawm tias ob leeg muaj txiaj ntsig, cross-platform apps tsis hloov pauv tau thiab muaj teeb meem kev sib raug zoo. Lawv siv ntau qhov chaw thiab txwv thaum nws los txog rau UI / UX. Native mobile apps kuj teb ntau dua, uas yog ib qho tseem ceeb rau cov txheej txheem keeb kwm yav dhau. Thaum kawg, haiv apps yog qhov kev xaiv zoo tshaj plaws rau koj lub mobile app.
Lwm downside rau hybrid apps yog lawv tsis muaj kev txhawb nqa rau ntau yam kev khiav hauj lwm systems. Native mobile apps, ntawm qhov tod tes, ua haujlwm ntawm txhua lub platform loj. Lawv tuaj yeem ntsia tau rau ntawm ib qho khoom siv tib yam li hybrid app. Native mobile apps muaj zog dua, tab sis tus neeg nruab nrab yuav tsis paub txog qhov sib txawv ntawm lawv. Tsuas yog qhov sib txawv ntawm haiv neeg thiab hybrid apps yog hom lus.
Ib qho kev nce qib web app (PWA) yog ib daim ntawv thov cross-platform uas tuaj yeem khiav ntawm txhua lub platform, suav nrog desktops, xov tooj ntawm tes, thiab ntsiav tshuaj. Vim tias cov ntsiab lus tau sau ua hom lus txhawb nqa los ntawm tus neeg muag khoom OS, cov apps no khiav ntawm txhua tus qauv-raws li browsers, suav nrog HTML thiab CSS. Ntxiv rau, lawv tau sib xws nrog ntau yam khoom siv OS, suav nrog cov cuab yeej siv ARM.
Ob qho tib si haiv neeg thiab cov vev xaib nce qib muaj lawv cov txiaj ntsig. Thaum lub vev xaib kev vam meej feem ntau sau ua hom lus txhawb nqa los ntawm tus neeg muag khoom OS, lawv tsis qhia cov cuab yeej cov ntaub ntawv khaws cia. Lawv cia siab rau cov ntaub ntawv los ntawm qhov browser tsis yog lub cuab yeej kho vajtse thiab software, ua rau lawv muaj zog ntau dua li lawv cov neeg zej zog. Tab sis thaum cov apps hauv ib txwm muaj qhov zoo ntawm kev nkag mus rau cov cuab yeej kho vajtse thiab khaws cia roj teeb lub neej, cov kev siv web zoo tsis ua.
Siv tus neeg ua haujlwm pabcuam tso cai rau cov vev xaib txuas ntxiv kom siv cov programmable cov ntsiab lus caches. Ib txwm HTTP web cache, los ntawm qhov sib txawv, caches cov ntsiab lus tsuas yog tom qab nws thawj zaug siv, thiab tso siab rau heuristics los txiav txim thaum nws tsis xav tau lawm. Programmable cache, sib piv, tuaj yeem qhia meej prefetch cov ntsiab lus ua ntej tus neeg siv thov nws, thiab muab pov tseg thaum lawv tsis xav tau lawm. Tsis zoo li HTTP web cache li niaj zaus, Cov kev vam meej hauv lub vev xaib tuaj yeem ua rau lawv cov nplooj ntawv nkag mus tau offline thiab dhau ntawm cov tes hauj lwm tsis zoo.
Native apps qeeb dua los tsim thiab tswj, tab sis yooj yim rau deploy ntawm lub cuab yeej. Lawv kuj tseem kim dua los tswj, raws li haiv neeg apps yuav tsum tau ntsia rau ntawm lub cuab yeej. Txawm li cas los, mobile app developers tuaj yeem sau tib hom apps rau ntau lub platform. Qhov tsuas yog qhov tsis zoo ntawm hybrid apps yog tias lawv yuav tsum tau cais cov plhaub ib txwm rau Android thiab Apple iOS. Ntxiv rau, hybrid apps zoo dua rau kev txhim kho MVP thiab cov ntsiab lus yooj yim raws li cov haujlwm.
Thaum nws los txog rau launching ib tug zuj zus web app, hom lus koj siv yuav tsum tau txais kev txhawb nqa los ntawm lub cuab yeej ua haujlwm. Txoj kev no, koj tuaj yeem ua kom lub app ua haujlwm zoo thoob plaws ntau lub platform. Yog hais tias koj muaj ib tug mobile ntaus ntawv uas tsis txhawb haiv neeg apps, koj tseem tuaj yeem faib nws los ntawm App Store. Koj tuaj yeem txuag tau PWA ntawm koj lub vijtsam hauv tsev yam tsis tau rub tawm cov ntaub ntawv.
Txawm tias muaj koob meej ntawm PWAs, haiv apps tseem tuaj yeem muab kev paub zoo dua. Lawv siv cov cuab yeej tshwj xeeb xws li lub koob yees duab, lub gyroscope, thiab accelerometer muab cov kev paub zoo tshaj plaws rau cov neeg siv. Native apps kuj tseem tuaj yeem hloov cov ntaub ntawv tseem ceeb rau hauv kev paub dhau los. Piv txwv li, lawv tuaj yeem taug qab tus neeg siv qhov chaw, hlawv calories, thiab txawm qhia augmented kev muaj tiag rooj tog.
Qhov kev daws teeb meem nrov tshaj plaws yog haiv neeg app tsim kho. Nws yog lub hauv paus ntawm ntau lub npe nrov apps xws li LinkedIn, PokemonGo, Telegram, thiab Google Maps. Txoj kev no yog qhov zoo tagnrho rau kev tsim cov ntawv thov mobile uas yooj yim siv thiab tswj. Txawm li cas los, Nws yog ib qho tseem ceeb kom nkag siab qhov ntawd 80% ntawm cov neeg siv khoom yuav tsuas sim ib lub mobile app ib zaug. Txawm tias me ntsis kev ua haujlwm tsis zoo tuaj yeem cuam tshuam kev siv yav tom ntej.
Pib nrog Android apps programming yog ib qho yooj yim, tab sis tsis yog tsis muaj ob peb yam tseem ceeb kom paub. Nyob rau hauv ib tug nutshell, koj yuav xav tsim ib qho haujlwm (lub qhov rais ntawm qhov screen uas tus neeg siv cuam tshuam nrog) thiab sau code rau nws. Ib qho haujlwm ua rau tus neeg siv ua ntau yam haujlwm, xws li hu rau ib tug phooj ywg lossis xa email. Nyob ntawm qhov loj ntawm qhov screen, lub qhov rais ua haujlwm tuaj yeem nqa tag nrho lub vijtsam lossis me dua. Nws muaj peev xwm txawm nteg tshaj lwm qhov rais.
Koj tuaj yeem kawm code rau Android los ntawm kev kawm cov hauv paus ntawm Java thiab XML. Koj tseem yuav xav kawm txog Kev Txhim Kho Ib puag ncig kev sib koom ua ke (IDE) thiab tsim cov cuab yeej automation. Piv txwv li, Koj tuaj yeem siv dab noj hnub lossis Android app studio IDEs. Koj tseem tuaj yeem kawm paub tswj kev tsim kho siv cov cuab yeej xws li Apache Maven thiab Ant. Thaum koj tau kawm cov hauv paus ntawm Android apps programming, koj tuaj yeem faib mus rau lwm qhov haujlwm, los yog pab txhawb rau lub zej zog qhov project.
Thawj kauj ruam hauv kev kawm rau kev pab cuam rau Android apps yog rub tawm thiab txhim kho Android Studio. Koj tseem yuav xav tau Java thiab Java Development Kit (JDK). Thaum koj nyob hauv lub computer, qhib Android Studio ntawv qhia zaub mov thiab nyem rau ntawm 'New project'. Los ntawm no, koj tuaj yeem kho cov kev xaiv. Koj tuaj yeem sau cov lej hauv Android Studio. Nco ntsoov tias koj muaj qhov tseeb version ntawm Java Development Kit (Java SDK).
Thaum koj muaj cov hauv paus hauv qab koj siv, koj tuaj yeem tsim ntau txoj haujlwm nyuaj raws li koj qhov kev paub thiab kev kawm. Koj tuaj yeem tsim koj thawj app los ntawm tus qauv. Siv Android Studio, koj tuaj yeem coj kom zoo dua ntawm ntau cov qauv thiab cov khoom uas muaj. Raws li koj qhov kev txawj ntse txhim kho, koj tuaj yeem kho qhov project thiab ntxiv nta. Pib nrog Android apps programming tsis nyuaj li koj xav. Los ntawm kev kawm qhov sib txawv ntawm txoj kev txhim kho, koj tuaj yeem tsim cov apps uas ua tau raws li koj lub hom phiaj.
Txhawm rau pib nrog Android apps txhim kho, Nws yog ib qho tseem ceeb uas yuav tau xaiv txoj kev kawm zoo. Android programming platform yog ib qho ntawm feem ntau siv mobile operating systems nyob rau hauv lub ntiaj teb no, nrog ntau pua lab ntawm cov cuab yeej siv los ntawm nws dhau 190 lub teb chaws. Nrog cov txheeb cais no, Nws tsis yog qhov xav tsis thoob tias Android yuav ua tus thawj tswj hwm lub lag luam txawb los ntawm 2020. Los ntawm ua raws li cov lus qhia ib kauj ruam, koj tuaj yeem npaj koj tus kheej los ua tus tsim tawm Android. Nws yog ib qho tseem ceeb kom muaj qee qhov kev paub keeb kwm yav dhau hauv Java, XML, thiab Kotlin ua ntej sim Android app txhim kho.
Thaum koj tau ua tiav cov txheej txheem no, koj tuaj yeem sim tawm Android Jetpack Compose toolkit. Nws yog ib lub cuab yeej uas ua raws li Kotlin, uas yog ib hom lus programming uas cuam tshuam nrog Java. Nws kuj muab ntau lub tsev qiv ntawv rau Android. Cov tsev qiv ntawv yog nyob ntawm Android's androidx namespace. Qhov no namespace hloov Cov Tsev Qiv Ntawv Txhawb Nqa thiab ua tau zoo nrog Java. Tsim ib qhov project app, qhib Android Studio thiab xaiv ib qho ntawm cov kev txhawb nqa tshiab project templates.