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 txaus siab rau Android Programmierung, koj muaj ntau yam kev xaiv muaj rau koj. Koj tuaj yeem pib los ntawm saib ntawm Google Play Store, uas tau dhau 3 lab daim ntawv thov. Muaj ntau ntawm lawv muaj txiaj ntsig thiab muaj txiaj ntsig zoo, yog li koj yuav tsum xav txog siv ib qho ntawm lawv. Dhau li Java, Koj tuaj yeem siv Objective-C, Swift, thiab XML hlua.
Android programmierung hauv Java yog hom lus nrov siv los tsim cov ntawv thov Android. Cov lus muaj nyob rau hauv ntau yam kev qhia thiab phau ntawv thiab yuav tsum tau ua haujlwm me ntsis thiab kev cog lus rau tus tswv. Qhov kev qhia no yuav pab koj kawm paub txog cov hauv paus ntawm Android programmierung hauv Java thiab qhov chaw sib txawv ntawm kev loj hlob.
Ib qho txiaj ntsig ntawm Java-raws li Android daim ntawv thov yog tias nws tuaj yeem khiav ntawm ntau lub platform. Ob leeg Java thiab Python muab ntau lub tsev qiv ntawv thiab APIs rau Android programmers. Yog tias koj npaj ua haujlwm nrog cov txheej txheem qub qub thiab xav tau tsim cov ntawv thov sai, Java yog qhov kev xaiv zoo dua.
Java txhawb coroutines, uas tso cai rau koj los tsim ntau cov xov ntawm kev ua tiav. Txawm li cas los, qhov no tuaj yeem nce qhov loj ntawm koj qhov programming codebase thiab ua rau muaj kev pheej hmoo ntawm cov lej yuam kev. Lwm qhov tsis zoo ntawm Java yog tias nws xav kom koj tshawb xyuas hom sib txawv ntawm tus kheej. Kom zam qhov no, koj yuav tsum siv cov lus programming uas txhawb nqa ntse casts. Qhov no feature cia li hloov redundant casts nrog cov nqi ruaj khov.
Dhau li muab kev qhia ntxaws ntxaws rau Android programming hauv Java, phau ntawv tseem hais txog cov ntsiab lus tseem ceeb rau kev txhim kho app kev tshaj lij. Qhov no suav nrog kev nkag siab cov ntaub ntawv khaws cia thiab cov txheej txheem keeb kwm yav dhau. Ntxiv rau, Koj yuav kawm paub siv Android Studio thiab Android SDK li cas.
Yog koj tab tom nrhiav ceev, txoj hauv kev yooj yim los tsim cov ntawv thov Android, Koj yuav tsum xav txog kev siv Objective-C. Cov lus no zoo ib yam li Java thiab nws muaj cov cuab yeej zoo heev thiab cov tsev qiv ntawv siv. Nws kuj tseem siv tau ntau dua thiab tuaj yeem siv los tsim cov apps rau iOS thiab Android. Koj yuav tsum muaj kev paub zoo ntawm Java, yog li nws tseem ceeb heev uas yuav tau xaiv ib qho IDE uas tuaj yeem khiav ntawm Android thiab iOS.
Lub Hom Phiaj-C yog hom lus programming uas tsim nyog rau cov neeg uas muaj qee qhov kev paub nrog C ++ tab sis tsis xav nkag mus rau hauv qhov nyuaj ntawm Java. Txawm li cas los, nws yog qeeb dua Java thiab muaj qhov txwv kev txhawb nqa. Yog tias koj xav siv Objective-C, Koj tuaj yeem tau txais koj txhais tes ntawm PSPDF Cov Khoom Siv.
Lub Hom Phiaj-C yog lub superset ntawm C thiab muaj ntau tus yam ntxwv ntawm cov khoom taw qhia. Nws kuj yog ib hom lus programming ruaj khov, nrog lub zej zog loj thiab lub tsev qiv ntawv loj ntawm kev qhia thiab cov ntaub ntawv. Qhov zoo tshaj plaws txog nws yog tias koj tuaj yeem kawm tau sai thiab tuaj yeem tsim lub app zoo nrog teeb meem me me.
Lub Hom Phiaj-C txhawb ob qho tib si zoo li qub thiab dynamic typing. Qhov no txhais tau tias koj cov cai tuaj yeem tshawb xyuas hauv lub sijhawm tiag tiag rau kev ua yuam kev. Txawm li cas los, hom lus no muaj keeb kwm ntev. Raws li cov lus qhib, koj tuaj yeem nrhiav ntau yam cuab yeej los ntawm Apple thiab cov tuam txhab thib peb. Tsis ntev los no Apple tau tshaj tawm cov cuab yeej tshiab xws li PencilKit (rau Apple Pencil) thiab SiriKit (rau peb-tog apps). Nws kuj txhawb MapKit, uas ua rau kom muaj peev xwm hloov kho UI.
Yog tias koj yog tus tsim tawm Android thiab xav ua kom koj lub app khiav ntawm ntau lub platform, Swift yog lub cuab yeej tsim nyog rau txoj haujlwm. Nws muaj ntau yam nta uas ua rau nws zoo tagnrho rau kev txhim kho mobile, thiab nws yog dawb rau developers. Nws kuj txhawb nqa ntau yam ntawm cov hom phiaj kev loj hlob, suav nrog Android NDK, Cocoa, Java, thiab ntau dua.
Yog tias koj tab tom npaj siv Swift rau kev txhim kho Android, Nws yog ib lub tswv yim zoo kom muaj qee yam kev paub hauv lwm yam lus programming, tshwj xeeb tshaj yog Swift rau iOS no. Cov lus yog qhib qhov chaw, uas txhais tau tias koj tuaj yeem nrhiav ntau tus neeg txaus siab los pab koj. Koj tseem tuaj yeem siv Swift los tsim iOS apps, thiab iOS developers kuj yuav raug hais kom sau Android apps hauv Swift. Ntxiv rau nws qhov yooj, Swift kuj ceev thiab yooj yim kawm.
Thaum Swift yog ib hom lus qhib, koj tuaj yeem siv koj cov cuab yeej nyiam nrog nws, suav nrog Android NDK. Qhov no txhais tau tias koj tuaj yeem siv feem ntau ntawm cov cuab yeej koj tau siv rau C / C ++ kev txhim kho, xws li cov qib qis debugger.
Swift kuj tseem sib tham sib heev, uas txhais tau tias koj tuaj yeem sau cov lej hauv lub davhlau ya nyob twg lossis LLDB debugging console ntawm Xcode. Qhov no txhais tau tias koj tuaj yeem cuam tshuam thiab ntsuas koj cov apps khiav, sau tus lej tshiab, thiab khiav kev xeem tau yooj yim.
XML yog ib hom lus siv los txhais cov ntaub ntawv. Nws yog muab los ntawm Standard Generalized Markup Language (SGML). XML yog lub teeb yuag, scalable, thiab yooj yim sau. Nws yog siv los siv cov ntaub ntawv rau UI ntawm Android daim ntawv thov.
AsyncTask-framework rau Android programming muab txoj hauv kev yooj yim los sib txuas lus ntawm cov xov tseem ceeb thiab cov xov keeb kwm yav dhau. Nws ua haujlwm los ntawm kev dhau qhov tshwm sim ntawm keeb kwm yav dhau los rau txoj kev onPostExecute, uas tom qab ntawd tau txais qhov tshwm sim los ntawm cov txheej txheem keeb kwm yav dhau. Qhov no yog lub hauv paus tsim thaiv ntawm Android programming.
AsyncTask yog chav kawm paub daws teeb meem uas muab lub hauv paus rau kev ua haujlwm asynchronous. Muaj peb txoj hauv kev loj hauv AsyncTask. Thawj, ntawm PreExecute, khiav ntawm lub ntsiab xov, npaj lub dialog loading thiab ceeb toom rau tus neeg siv tias ib txoj hauj lwm tab tom yuav pib. Txoj kev thib ob, uaInBackground, khiav ntawm ib txoj xov sib cais hauv keeb kwm yav dhau.
Ntxiv rau qhov muaj peev xwm ua tiav cov haujlwm hauv keeb kwm yav dhau, AsyncTask tseem tso cai rau cov ntawv thov tshaj tawm UI hloov tshiab thaum ua haujlwm tom qab. Vim tias Android Cov Kev Ua Si khiav ntawm cov xov tseem ceeb, khiav ib qho I / O lossis cov haujlwm ua haujlwm hnyav ntawm cov xov no tuaj yeem nres UI. AsyncTask muab lub moj khaum rau Android daim ntawv thov tsim tawm los siv cov haujlwm uas yuav raug ua tiav ntawm cov xov keeb kwm yav dhau ua ntej cov xov tseem ceeb ua tiav nws txoj haujlwm..
AsyncTask-Task-Framework yog ib qho kev faib tawm uas txhawb nqa kaum tawm txhiab tus async cov haujlwm ib ob. Nws cov neeg tsim khoom tsim lub moj khaum tom qab tsis nrhiav kev daws teeb meem rau lawv cov kev xav tau tshwj xeeb. Dropbox engineers siv ATF hauv 28 engineering pab pawg thiab nws tam sim no ua haujlwm ntau npaum li 9,000 async tej hauj lwm ib ob.
Native Android Apps yog tsim los khiav ntawm cov khoom siv hauv Android. Lawv tuaj yeem tsim tau siv HTML, CSS, los yog JavaScript. Cov lus no tau sib xws nrog ob lub Windows systems thiab Android pab kiag li lawm. Lub Android SDK kuj tseem txhawb nqa cov thev naus laus zis hla platform, suav nrog Xamarin. Android. Cov cuab yeej no tso cai rau koj tsim cov apps hauv ib txwm siv siv cov lus sib tham thiab sib qhia cov lej hla lub platform.
Tsim los siv lub hauv paus ntsiab lus ntawm lub mobile operating system, haiv apps siv haiv neeg functionality ntawm lub mobile ntaus ntawv. Qhov no ua rau lawv nrawm thiab ua kom zoo dua ntawm lub platform cov yam ntxwv. Cov apps hauv haiv neeg tuaj yeem suav nrog kev ua haujlwm ua haujlwm piav tes piav taw. Lawv kuj tuaj yeem muaj kev nyab xeeb thiab siv cov yam ntxwv kev nyab xeeb ntawm lawv cov kev khiav haujlwm.
Native Android Apps muaj qhov zoo dua li hybrid apps. Cov apps hauv haiv neeg siv cov peev txheej hom lus thiab tuaj yeem siv ntau haiv neeg. Ntxiv rau, lawv tuaj yeem siv Internet ntawm Yam (IoT) khoom siv, virtual kev muaj tiag (VR), thiab augmented kev muaj tiag (AR). Lawv kuj ua raws li lub platform cov txheej txheem tsim, muab kev paub ntau dua rau cov neeg siv.
Lwm qhov zoo dua ntawm cov apps ib txwm muaj yog lub peev xwm los tswj lawv qhov loj me, kev taw qhia, thiab daws teeb meem. Txij li cov apps ib txwm ua tau zoo rau OS, lawv tuaj yeem raug tsom mus rau lub cuab yeej zoo, uas ua rau lawv sai dua. Piv txwv li, Daim ntawv thov Facebook tau sau ib zaug hauv HTML5 code thiab tau qeeb qeeb ntawm iPhones. Teb rau qhov no, Facebook app developers txiav txim siab los tsim cais code rau lub iOS platform. Qhov no tau muab Facebook lub peev xwm los txhim kho cov cai kom khiav nrawm dua ntawm iOS li.