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 tau xav txog yuav ua li cas los txhim kho Android app, koj tsis yog ib leeg. Muaj ib lub tuj ntawm cov peev txheej muaj nyob hauv Is Taws Nem, Thiab Android Apps Programming yog tsis muaj kev zam. Hauv tsab xov xwm no, Koj yuav kawm txog Android app kev loj hlob hauv paus, Lub SharreactionProvider, Activity Lifecycle Callbacks, thiab ntau dua. Koj kuj tseem yuav kawm txog qhov txawv ntawm cov txiv neej cov apps thiab cov vev xaib nce qib siab.
Yog tias koj tau xav tias yuav ua li cas txoj haujlwm Android apps, Cov lus teb yog yooj yim heev – Koj yuav tsum tau kawm java! Android apps muaj ob qho sib xyaw: ib qho kev ua si thiab saib. Cov kev ua si txhais tau cov duab sab ntawm sab av loj thiab kev ua haujlwm ntawm lub, Thaum pom pom muaj Java code uas txiav txim siab dab tsi tshwm sim thaum khawm nias. Ob feem ntawm cov khoom siv khiav ntawm Android-Tshaj Li. Qhov kev qhia no yuav pab koj kawm paub tias kev pabcuam Android apps nrog Java!
Phau ntawv no qhia koj cov hauv paus ntawm Java rau Kev Tsim Kho Android, uas yog qhov tseem ceeb yog tias koj xav tsim cov app tshaj lij. Nws pib nrog Android-Richtlinies rau cov neeg siv interface tsim, thiab xaus nrog ib tug app featuring ib timer. Koj yuav siv Java los tsim lub app, thiab koj yuav tau txais ntau txoj kev paub hauv cov txheej txheem! Nws tseem tau ntim nrog cov lus qhia muaj txiaj ntsig los ua kom koj lub app ua tiav, ib yam nkaus.
Cov txheej txheem ntawm kev kawm yuav ua li cas rau kev pabcuam Android apps pib nrog rau npe ua tus tsim tawm nrog Google. Koj yuav them tus nqi ib-zaug rau cov kev pabcuam no, Tab sis tom qab ntawd, Koj tuaj yeem muab koj cov apps rau download lossis muag, thiab google yuav siv ib qho kev pab rau txhua qhov muag. Cov kev ua tiav Android yuav tsum tau siv ntawm Android SDK, Thiab java yog cov cuab yeej zoo rau qhov no. Koj tuaj yeem yooj yim kawm Java los ntawm cov theem no.
Lub Sarereproviderider rau Android apps Programmieren muab txoj hauv kev rau cov neeg tsim khoom los tso cov ntaub ntawv hauv lawv cov ntawv thov. API tso cai rau cov neeg tsim khoom ntxiv qhov ntsuas kev kawm thiab cov chav kawm sib xws rau lawv cov phiaj xwm Android. API kuj muab lub peev xwm xa cov ntaub ntawv rau lwm cov ntawv thov. Txhawm rau siv Sharchereprovider rau Android apps, Ua ntej tsim ib qho haujlwm hauv Android thiab tom qab ntawd txuas rau koj lub PC ntawm ADB. Qhov no yuav tsim txoj haujlwm tshiab uas koj tuaj yeem nruab ntawm cov khoom sib txuas. Thaum koj muaj koj txoj haujlwm tshiab tsim, koj tuaj yeem pib coding.
Koj tuaj yeem siv Sharreacteprovider rau Android apps los qhia cov cim qhia hauv koj app qhov kev txiav txim siab. Lub sareageTeprovider yuav tsim kev pom rau tus neeg siv pom thaum lawv sib koom cov ntaub ntawv. Nws tseem qhia tau submenu uas teev ntau yam kev ua ub no. Nws yog qhov ua tau los teeb tsa lub hom phiaj rau cov kev ua no. Koj tuaj yeem ntxiv ib qho kev nqis tes ua rau kev txiav txim siab yog tias koj xav kom tus neeg siv tau pom cov lus uas qhia lawv txog cov teeb meem.
ShareETProvider tso cai rau cov neeg tsim tawm mus rau cov neeg caij lub luag haujlwm rau cov khoom pom thiab tus cwj pwm. Nws tso cai rau cov neeg tsim tawm los tsim cov peev nyiaj uas cia cov neeg siv qhia lawv cov ntsiab lus nrog lwm cov apps. ShareTeprovider tso cai rau cov neeg tsim tawm kom muaj kev txuas rau Sarinecteprovider lub vev xaib hauv lawv cov apps. Qhov kev pab cuam nrog nrog SharreactionProvider rau Android apps
Txhawm rau siv lub neej ua haujlwm ntawm koj cov app, Koj yuav tsum paub yuav siv cov Android api. Lub kaw lus yuav hu rau OnStart thiab Onstop txoj kev ntau dua ib zaug hauv lub neej ntawm ib qho haujlwm. Lub sijhawm no, Cov kev ua yuav hloov los ntawm pom kom zais, Hloov chaw ntawm onCreate thiab onstop. Kom pom thaum ib qho kev ua si raug rhuav tshem, Kos cov lus logcat. Yog tias koj nrhiav tsis tau cov qauv uas koj tab tom nrhiav, Koj yuav tsum xav txog txuas lub api.
Hauv Android, koj yuav feem ntau ua rau ntawm() Txhawm rau nkag mus rau ib qho kev ua si rau hauv lub xeev nquag. Yog tias qhov kev ua yog nyob rau tom qab, ntawm Pause() yuav raug hu ua. Ib yam li ntawd, unstopped() yog hu thaum ua haujlwm raug kaw. Ob tus neeg hu xov tooj yog siv los ua cov peev nyiaj pub dawb thiab ua kom tiav lwm lub sijhawm ua haujlwm. Tau siv hauv tseem tau siv ua ntej tias lub onstop() Txoj kev hu ua.
Hauv Android lub neej yog nthuav tawm los ntawm cov ntawv thov los ntawm Callback Cov Tswv Cuab. Cov cuppacks no ua raws li ib hom “pawg” thiab tshwm sim los tshwm sim hauv qhov kev txiav txim tsis yog. Lawv tseem nco ntsoov cov khoom uas yuav tsum tau daws hauv txhua theem. Txhawm rau kom siv tau kom zoo ua kom lub neej rov qab, koj yuav tsum siv nativeactivity lossis haiv neeg_app_glue. Muaj ntau cov piv txwv ntawm ob.
Ib qho ntawm qhov sib txawv ntawm cov vev xaib (PWA) thiab cov ntawv thov ib txwm yog lawv lub platform ntawm kev tua. Thaum cov txiv apps yog tsim los khiav ncaj qha ntawm lub cuab yeej OS, Pwas yog tsim siv cov vev xaib web technologies. Lawv khiav hauv browsers thiab yog li ntawd tuaj yeem tsim tawm sai thiab inexpensively. Cov ntawv thov neeg sib xws, txawm li cas los xij, Lawv tsis tas yuav siv tau App Khw Kev Siv. Lawv tuaj yeem tsim thiab tsim tawm sai dua ntau dua li cov apps, Tab sis tus tsim tawm yuav tsum tsim kho ob qho tib si txawv.
Ntxiv rau cov sib txawv no, Cov txheej txheem txhim kho yog ntau lub sijhawm siv sijhawm ntau rau cov khoom siv. Haiv neeg cov apps feem ntau siv sijhawm ntev dua los txhim kho dua li pwas, tab sis lawv feem ntau tau teb dua. Vim tias lawv yuav tsum tau tshuaj xyuas cov txheej txheem, Cov apps neeg yog qhov nyuaj tshaj tawm thiab yuav tsum tau tshuaj xyuas. Native Apps tseem muaj roj teeb ntau dua li pwas. Ntxiv rau, Lawv yooj yim los tuav dua li Pwas. Native apps kuj muaj ob kauj ruam rub tawm, ua rau nws yooj yim dua rau cov neeg tsim khoom los hloov cov ntsiab lus tsis tas yuav rov pib dua qhov project.
Feem ntau, Cov app ib txwm yog qhov kev xaiv uas nyiam dua rau cov neeg tsim khoom vim tias lawv tuaj yeem nkag mus rau ntau cov nta ntawm cov cuab yeej. Cov apps no tsim siv cov lus programming tshwj xeeb thiab yog qhov zoo los khiav ntawm lub cuab yeej. Haiv neeg apps tseem feem ntau txhim khu kev qha thiab nyab xeeb dua li lawv PWA counterparts. Raws li qhov tshwm sim, Lawv muaj kev ruaj ntseg dua lawv cov counterparts, thiab lawv cov kev ua tau zoo zoo dua. Yog li twg ib qho zoo dua? Nyeem rau kom paub!
Ua ntej koj pib coding ib qho kev thov Android, Nws yog ib qho tseem ceeb kom nkag siab txog ntau yam ntawm Android platform thiab cov lus sib txawv ntawm cov lus siv. Android yog cov fragmented platform nrog ntau hom cuab yeej siv thiab cov haujlwm ua haujlwm. Txhua lub cuab yeej muaj ib qho kev tso cai tshwj xeeb, thiab txhua daim ntawv thov yuav tsum tshaj tawm cov kev tso cai no hauv daim ntawv thov code los ntawm kev tso cai kev tso cai thiab hauv Android:Kev Tso Cai Tus Kheej.
Pib tawm, Android app tshaj tawm cov khoom kho vajtse thiab software nta uas nws yuav siv, Raws li zoo li API cov tsev qiv ntawv nws yuav siv. Daim ntawv thov ib txwm muaj xws li ib lub icon, Lub npe rau cov chav kawm muaj cai muaj npe ntawm nws lub subclass, thiab daim ntawv lo uas yuav pom tau rau tus neeg siv. Cov feem no tau hu ua cov peev txheej hauv cov code ntawm ib qho Android app. Los ntawm kev siv cov peev txheej no, Lub app tuaj yeem ua tau zoo rau cov khoom lag luam sib txawv.
Tus naj npawb ntawm cov khoom siv Android uas muaj keeb kwm. Qhov tseeb, muaj 2.6 Billion Txuas Ntiaj Teb, ua txoj haujlwm ntawm kev tsim cov app zoo li tsis muaj lub hlwb. Kotlin, Cov lus programming niaj hnub rau Android, yog pom zoo rau nws cov syntax thiab cov lej kev nyab xeeb nta. Koj tuaj yeem kawm Kotlin online dawb lossis sau npe rau hauv chav kawm ntawv rau tus kws qhia ntawv.
Tus thawj coj zoo tuaj yeem pib kawm cov hauv paus siv kev qhia. Piv txwv li, Kev cai teev – Android apps los ntawm Google yog qhov chaw zoo pib. Nws qhia cov ntsiab cai yooj yim, Tab sis nws tsis tsom rau ib hom lus programming. Tsis hais hom lus twg uas koj xaiv, Koj yuav kawm txog cov qauv kev teeb tsa, hloov, thiab loops. Qhov no pab koj tsim cov khoom ntau dua.