Peb npaj koj qhov kev pom! Kev ua tau zoo nrog ONMA scout android app kev txhim kho yog lav.
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Thaum koj txiav txim siab los tsim ib qho Android app, koj yuav tau tsim nws cov cai. Muaj ntau ntau yam uas yuav tsum xav txog thaum tsim koj lub app. Lub npe ntawm lub app yog dab tsi cov neeg tuaj saib pom thaum nws yog ntsia. Lwm qhov tseem ceeb ntawm kev txhim kho app yog lub npe pob, uas yog tus siv sab hauv siv los ntawm Android. Koj lub npe pob app yuav tsum muaj cov npe saum toj kawg nkaus, koj lub tuam txhab npe, thiab koj lub npe app. Yog tias koj tsis muaj npe lossis tuam txhab npe, koj siv tau “com” ua raws li ib yam dab tsi. Thaum kawg, koj yuav tsum tau txiav txim siab txog hom lus coding thiab qhov chaw khaws koj cov ntaub ntawv.
Raws li ib qho ntawm cov lus programming nrov tshaj plaws, Java muaj ntau cov cuab yeej thiab cov tsev qiv ntawv uas ua rau nws yooj yim los tsim cov apps rau Android. Raws li qhov tshwm sim, muaj ib lub zej zog loj ntawm java developers, uas tuaj yeem pab koj hauv koj txoj kev txhim kho. Cov lus no tshwj xeeb tshaj yog tsim rau kev txhim kho app, vim nws tuaj yeem pab koj tsim cov ntawv thov rau ntau hom xov tooj ntawm tes. Tab sis muaj qee yam yuav tsum xav txog ua ntej koj pib ua haujlwm nrog Java.
Ua ntej, xyuas kom tseeb tias koj paub nrog lub platform koj tab tom tsim cov ntawv thov rau. Android yog ib tug nrov mobile platform, thiab koj yuav tsum muaj tsawg kawg yog kev nkag siab yooj yim ntawm Java ua ntej koj pib tsim cov apps rau nws. Java tuaj yeem pab koj tsim cov apps rau Android thiab iOS platforms. Muaj ntau ntau yam cuab yeej thiab thev naus laus zis uas koj tuaj yeem siv tau, thiab yog tias koj tsis paub tseeb tias yuav siv qhov twg, nyeem Java phau ntawv thiab kawm cov kev coj ua zoo tshaj plaws.
Tom ntej no, txiav txim siab seb yuav khaws koj cov ntaub ntawv qhov twg. Cov ntawv thov Java khiav hauv lub tshuab virtual uas raug cais tawm ntawm cov khoom siv hauv qab. Qhov no tso cai rau lub operating system tswj kev ua tiav code. Linux-based operating system kuj tseem saib xyuas cov ntawv thov ua haujlwm ntawm Android. Yog lawv ua tej yam tsis tsim nyog, tej zaum lawv yuav raug yuam kom kaw. Yog li nco ntsoov siv qhov yog! Yog tias koj tsis paub meej yuav ua li cas rau nruab dab noj hnub, tshawb xyuas lub vev xaib tsim tawm Android rau cov lus qhia ntawm kev txhim kho Java kev txhim kho ib puag ncig.
Yog tias koj tsis paub qhov txawv ntawm Kotlin thiab C ++, muaj xov xwm zoo rau koj: ob qho tib si yog portable heev nyob rau hauv lub operating systems. Kotlin's code syntax yog ncaj nraim, thiab nws tuaj yeem muab tso ua ke rau haiv neeg code lossis JavaScript. Zoo li Java, nws khiav ntawm Java Virtual Machine. Ob leeg yog portable heev, thiab ob hom lus muaj qhov zoo sib xws ntawm qhov zoo thiab qhov tsis zoo.
Raws li Android tau muab faib rau ntau yam khoom siv, Nws yog ib qho tseem ceeb uas yuav tau xav txog kev sib raug zoo ntawm lub platform. Qhov zoo, koj C ++ code yuav muab tso ua ke rau hauv ib lub tsev qiv ntawv uas yuav khiav ntawm txhua lub platform. Qhov no yog qhov tseem ceeb tshwj xeeb vim tias kev txhawb nqa 64-ntsis ABI yuav dhau los ua qhov yuav tsum tau ua nrog kev tso tawm ntawm Android Pie. Nws kuj tseem pom zoo kom siv qhov zoo ntawm NDK thaum tsim ib qho Android app. Dhau li, C ++ code tseem yuav ua haujlwm yam tsis muaj qhov txawv txav thaum lub sijhawm tsim thiab lub sijhawm ua haujlwm.
Hmoov zoo, ntau Android app txhim kho platforms txhawb C / C ++ code, thiab Android Studio tso cai rau koj khiav cov cai no ntawm lub cuab yeej ncaj qha. C++ code tuaj yeem txhim kho kev ua haujlwm, tshwj xeeb tshaj yog thaum tsim 3D ua si. Ntxiv, Nws yooj yim dua los muab cov tsev qiv ntawv sau hauv C, ua kom nws yooj yim dua li Java. Yog tias koj tsis paub tseeb tias qhov twg yog qhov zoo rau koj, xav txog kev kawm C++. Nws yooj yim kawm, thiab nws yog ib qho kev xaiv zoo rau ob qho tib si beginners thiab advanced developers.
Koj yuav pom qee qhov zoo rau kev siv Python rau Android app txhim kho. Cov lus programming no los nrog ib qho kev debugger uas tuaj yeem pab koj kuaj xyuas qhov yuam kev hauv koj cov cai. Nws lub dynamic coop tso cai rau koj los soj ntsuam cov kab lus los ntawm kev tshawb nrhiav qhov thaiv tam sim no thiab tag nrho nws cov haujlwm. Ntxiv thiab, nws yog dawb rau kev lag luam siv, yog li nws tsim nyog kawm. Txawm li cas los, Nws tuaj yeem nyuaj rau qee tus tuaj tos Python sai. Yog vim li cas Python yog qhov kev xaiv zoo tshaj plaws rau kev txhim kho mobile app.
Python yog ib hom lus programming nrov uas tau siv dav hauv ntau qhov chaw, suav nrog kev txhim kho lub vev xaib thiab txhim kho daim ntawv thov mobile. Nws qhov tseem ceeb ntawm cov pob khoom thiab cov qauv ua rau nws yooj yim kawm. Nws kuj los nrog dhau 1,000 modules. Cov neeg uas muaj kev paub dhau los tseem tuaj yeem tau txais txiaj ntsig los ntawm kev siv Python los tsim cov apps raws sijhawm. Thiab nrog ntau cov modules muaj, Python hloov pauv ntau dua li lwm yam lus. Yog tias koj xav siv Python rau Android app kev txhim kho, Nov yog qee qhov zoo ntawm cov lus programming no.
Siv Python rau Android app txhim kho yog yooj yim dua li Java. Qhov tseeb, feem ntau Macs thiab Linux tshuab twb tau nruab Python. Txhua yam koj yuav tsum tau ua yog qhib lub davhlau ya nyob twg thiab ntaus hauv python los pib txheej txheem. Piv rau Java, Python kuj tseem kawm tau yooj yim dua thiab siv sai dua. Qhov tseeb, Yog tias koj xav siv Python rau Android app kev txhim kho, nws yog qhov kev xaiv zoo rau cov neeg uas xav tau lub sijhawm teb sai thiab cov lej zoo.
XML rau Android app txhim kho muaj ntau yam txiaj ntsig. XML yog lub teeb yuag, yooj yim rau code, thiab tuaj yeem siv los piav txog cov ntaub ntawv ntsig txog UI. Kab lus no yuav muab cov lus qhia luv luv rau kev siv XML rau mobile apps. Koj tuaj yeem kawm paub siv XML hauv koj qhov kev txhim kho Android. Nws qhov zoo yog tham hauv qab no. Yog tias koj xav pib tsim cov ntawv thov Android tam sim ntawd, XML yog txoj hauv kev zoo tshaj plaws mus.
XML yog ib hom lus cim uas yog tsim los nqa thiab teeb tsa cov ntaub ntawv. Nws tsom mus rau cov ntaub ntawv es tsis yog programming ua rau nws yog tus qauv sib tw nrov. Txawm hais tias nws tsis yog hom lus programming, XML yog qhov kev xaiv zoo rau kev sib hloov ntawm binary thiab ntawv nyeem. Nws yog ib qho tseem ceeb kom nco ntsoov tias cov ntaub ntawv XML feem ntau yog encoded hauv UTF-8, yog li xyuas kom tseeb tias koj tsis tso XML rau ntawm qhov chaw muaj kev txwv tsis pub muaj xws li Android.
Layouts rau Android apps tau sau hauv XML. Lawv qhia cov qauv ntawm tus neeg siv interface. Layout cov ntaub ntawv yuav tsum muaj lub hauv paus ntsiab lus hu ua saib. A View sawv cev rau ib qho khoom siv hauv. Ib subclass ntawm View class hu ua ViewGroup. Cov kev pom no tuaj yeem ua ke nrog lawv tus kheej cov ntaub ntawv XML. Lub ViewGroup yog cov chav kawm hauv qab rau txhua qhov layouts thiab saib cov thawv.
Muaj ob lub ntsiab lus tseem ceeb ntawm Tus Thawj Saib Xyuas Kev Ceeb Toom rau Android app txhim kho. Ib qho yog lub peev xwm los sau ntau cov ntawv ceeb toom. Qhov no feature muaj nyob rau messaging apps uas tso saib cov npe ntawm lawv cov lus tsis ntev los no. Cov ntawv ceeb toom tuaj yeem sau tau los ntawm kev ntxiv ib qho lus rau pawg. Yog muaj ntau cov lus, thawj tus yuav tshwm thiab lwm tus yuav tsis. Qhov thib ob feature yog lub peev xwm los teeb tsa tus nqi txwv rau cov ntawv ceeb toom. Yog tias lawv hloov kho ntau zaus, Android tseem tuaj yeem tso cov ntawv ceeb toom.
Txawm hais tias nws tsis yog qhov tseem ceeb rau koj siv qhov tshwj xeeb no rau koj lub Android app kev txhim kho, nws yog ib txoj hauv kev zoo kom koj cov neeg siv hloov tshiab. Cov ntawv ceeb toom muaj txiaj ntsig zoo rau kev ntxias cov neeg siv los qhib lub app thiab ntes lawv cov xim. Txawm li cas los, kev ceeb toom yuav tsum yooj yim npaum li lub icon, raws li cov neeg siv Android feem ntau tsis khoom thiab tsis muaj sijhawm los nyeem ntawv ntev. Qhov no yog vim li cas koj thiaj li yuav tsum siv lub cim los ua kom cov ntawv ceeb toom xav tau ntau dua rau cov neeg siv.
Thaum tsim koj cov ntawv ceeb toom, koj yuav tsum xyuas kom meej tias koj siv cov kev ceeb toom kom paub meej tias kev xa khoom zoo. Cov ntawv ceeb toom yog ib feem tseem ceeb ntawm Android app, thiab yuav tsum tau kuaj kom raug. Cov ntawv ceeb toom qhia rau cov neeg siv ntawm cov ntaub ntawv tseem ceeb, kom lawv paub txog cov xwm txheej yav tom ntej, thiab tiv thaiv lawv los ntawm kev teem caij uas ploj lawm. Thaum chav kuaj UI ntawm Android app yog qhov pib zoo heev, nws tsis txaus thiab tsuas yog ua tsis tiav yog tias koj tsis kuaj cov ntawv ceeb toom kom raug.
Lub luag haujlwm ntawm Android app txhim kho muaj cov khoom siv uas khiav hauv xov tooj. Nws khiav ntawm lub xov tooj processor thiab tuaj yeem siv los ua ntau yam haujlwm. Tsis zoo li lwm yam khoom, nws tuaj yeem qhib thiab kaw los ntawm tus neeg siv. Nyob ntawm hom ntaus ntawv, Android siv ntau txoj hauv kev qhib thiab kaw ib qho haujlwm. Ib txoj hauv kev no hu ua onStart(). Thaum txoj kev no tau hu ua, cov haujlwm tuaj yeem pom lossis zais.
Cov chav kawm ua haujlwm yog qhov tseem ceeb rau Android apps thiab yog qhov tseem ceeb ntawm cov qauv. Cov dej num yog qhov tseem ceeb qhov rais uas ib qho app tuaj yeem kos tus neeg siv interface. Lawv feem ntau yog nruab nrab ntawm qhov screen, tab sis tej zaum yuav me dua qhov screen los yog tshwm nyob rau sab saum toj ntawm lwm lub qhov rais. Ib chav ua haujlwm feem ntau siv ib qho screen. Txawm li cas los, muaj qee qhov tshwj xeeb tshwj xeeb rau txoj cai no. Yog tias koj tsis paub meej tias qhov Kev Ua Si yog ib feem tsim nyog rau koj lub app, Koj tuaj yeem sab laj cov ntaub ntawv Android.
Thaum pib qhov kev ua si, lub Android system pib cov txheej txheem app tsim nyog. Cov khoom siv no tseem yuav ua kom cov chav kawm xav tau. Cov txheej txheem no tso cai rau koj lub app dhia ntawm ib nplooj ntawv web mus rau lwm qhov, thiab txawm hloov ntawm daim ntawv thov yog tias tsim nyog. Piv txwv li, koj tuaj yeem qhib koj cov ntaub ntawv tiv toj hauv ib lub app thiab sau cov lus hauv lwm qhov. Ib yam li ntawd, koj tuaj yeem hloov mus rau lwm lub app hauv nruab nrab thiab rov pib ua haujlwm hauv tib yam haujlwm.