Cov txheej txheem:
Video: Dab tsi yog Android cov ntaub ntawv khi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov Data Binding Library yog ib Android Jetpack tsev qiv ntawv uas tso cai rau koj mus khi UI Cheebtsam hauv koj XML layouts rau cov ntaub ntawv qhov chaw hauv koj lub app siv cov ntawv tshaj tawm es tsis yog programmatically. Qhov no tuaj yeem txo tus lej boilerplate.
Ib yam li ntawd, tib neeg nug, kev siv cov ntaub ntawv khi hauv Android yog dab tsi?
Hnub no cov ntaub ntawv khi yog ib lo lus kub Android developers tsis ntev los no. Nws yog lub tsev qiv ntawv txhawb nqa uas tso cai rau peb khi cov UI Cheebtsam hauv layout rau cov ntaub ntawv cov peev txheej thiab qhov no yog ua tiav hauv hom ntawv tshaj tawm es tsis ua nws programmatically. Yog li nws txo cov boilerplate code ntau heev.
Dhau li saum toj no, kev khi cov ntaub ntawv txhais li cas? Cov ntaub ntawv khi yog tus txheej txheem uas tsim kom muaj kev sib txuas ntawm app UI thiab cov cov ntaub ntawv nws qhia. Yog tias kev khi muaj qhov tseeb nqis thiab cov cov ntaub ntawv muab cov ntawv ceeb toom kom raug, thaum lub cov ntaub ntawv hloov nws tus nqi, cov ntsiab lus uas yog khi rau lub cov ntaub ntawv xav txog kev hloov pauv tau.
Tsis tas li ntawd, koj siv cov ntaub ntawv khi li cas?
Txhawm rau pib siv cov ntaub ntawv khi ntawm koj lub studio hauv Android:
- Download tau lub tsev qiv ntawv los ntawm Support Repository hauv Android SDK tus thawj tswj.
- Configure koj app siv cov ntaub ntawv khi, ntxiv cov dataBinding caij rau koj tsim. gradle ntaub ntawv nyob rau hauv lub app module, raws li qhia nyob rau hauv cov piv txwv nram qab no:
Dab tsi yog ob txoj kev sib khi cov ntaub ntawv hauv Android?
Ob - txoj kev Data Binding yog ib tug txheej txheem ntawm kev khi koj cov khoom rau koj XML layouts kom ob qho khoom xa tuaj cov ntaub ntawv mus rau layout, thiab layout tuaj yeem xa cov ntaub ntawv rau qhov khoom.
Pom zoo:
Cov ntaub ntawv hom thiab cov qauv ntaub ntawv yog dab tsi?
Cov qauv ntaub ntawv yog ib txoj hauv kev piav qhia txog ib txoj hauv kev los npaj cov ntaub ntawv kom ua haujlwm andalogrithms tuaj yeem siv tau yooj yim dua. Ib hom ntaub ntawv piav qhia txog cov ntaub ntawv uas txhua tus sib koom ua ke. Piv txwv li tus lej cov ntaub ntawv hom piav qhia txhua tus lej uas lub khoos phis tawj tuaj yeem ua tau
Dab tsi yog qhov txawv ntawm XML cov ntaub ntawv thiab cov ntaub ntawv sib txheeb?
Qhov sib txawv loj ntawm XML cov ntaub ntawv thiab cov ntaub ntawv sib txheeb Ib daim ntawv XML muaj cov ntaub ntawv hais txog kev sib raug zoo ntawm cov ntaub ntawv rau ib leeg nyob rau hauv daim ntawv ntawm hierarchy. Nrog rau tus qauv kev sib raug zoo, tib hom kev sib raug zoo uas tuaj yeem txhais tau yog cov lus niam txiv thiab cov rooj sib raug zoo
Dab tsi yog qhov sib txawv ntawm pab pawg cov ntaub ntawv thiab cov ntaub ntawv tsis yog pawg?
Ob leeg yog cov ntaub ntawv muaj txiaj ntsig ntawm cov ntaub ntawv tab sis qhov sib txawv ntawm lawv yog cov ntaub ntawv tsis muaj ntaub ntawv yog rawdata. Qhov no txhais tau hais tias nws nyuam qhuav tau sau tab sis tsis txheeb rau hauv ib pawg lossis cov chav kawm. Ntawm qhov tod tes, groupeddata yog cov ntaub ntawv uas tau teeb tsa ua pawg los ntawm cov ntaub ntawv nyoos
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Dab tsi yog cov teeb meem ntawm kev tswj cov ntaub ntawv hauv cov ntaub ntawv ib txwm muaj?
Nyob rau tib lub sijhawm, qhov kev tswj hwm cov ntaub ntawv ib puag ncig tsim teeb meem xws li cov ntaub ntawv rov ua dua thiab tsis sib xws, cov kev pab cuam-cov ntaub ntawv dependence, inflexibility, tsis muaj kev ruaj ntseg, thiab tsis muaj cov ntaub ntawv sib qhia thiab muaj