Cov txheej txheem:
Video: Kuv yuav siv chav Android li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Kev ua ntawm Chav
- Kauj ruam 1: Ntxiv Gradle dependencies. Txhawm rau ntxiv nws rau koj qhov project, qhib qhov project theem build.gradle cov ntaub ntawv thiab ntxiv cov kab tseem ceeb raws li qhia hauv qab no:
- Kauj ruam 2: Tsim ib tug qauv chav kawm.
- Kauj Ruam 3: Tsim Cov Khoom Siv Cov Ntaub Ntawv (DAOs)
- Kauj ruam 4 - Tsim cov database.
- Kauj ruam 4: Tswj cov ntaub ntawv.
Hauv qhov no, Android chav database yog dab tsi?
Chav yog a database tsev qiv ntawv. Los ntawm cov ntaub ntawv: Chav muab cov txheej txheem abstraction tshaj SQLite kom ua tau zoo database nkag mus thaum siv lub zog tag nrho ntawm SQLite.
Kuj Paub tias, chav tsev qiv ntawv persistence Android yog dab tsi? Room Persistence Library Ib feem ntawm Android Dav hlau. Cov Room persistence Library muab cov txheej txheem abstraction dhau SQLite kom tso cai rau cov ntaub ntawv muaj zog ntau dua thaum siv lub zog tag nrho ntawm SQLite. Cov tsev qiv ntawv pab koj tsim lub cache ntawm koj lub app cov ntaub ntawv ntawm ib lub cuab yeej uas khiav koj lub app.
Khaws qhov no hauv kev xav, dab tsi yog chav database?
Chav yog ib txoj kev tshiab los tsim ib lub database hauv koj hauv apps, nws zoo ib yam li OrmLite. Lub hauv paus ntsiab lus muab kev txhawb nqa rau kev ua haujlwm nrog cov ntsiab lus SQL raw. Koj yuav tsum tau sau ntau ntawm boilerplate code los hloov ntawm SQL queries thiab Java cov ntaub ntawv khoom.
Puas yog chav ORM?
Chav yog ib ORM (object relational mapper) rau SQLite database hauv Android . Nws yog ib feem ntawm Architecture Components tso tawm los ntawm Google.
Pom zoo:
Kuv yuav ntxiv chav rau kuv daim ntawv qhia Roomba li cas?
Yog tias daim ntawv qhia tau tsim lawm, nyem rau ntawm Smart Maps khawm, tom qab ntawd nyem rau hauv pem teb koj xav hloov kho, thiab tom qab ntawd nyem rau ntawm Chav Sib faib khawm nyob hauv qab sab xis ntawm lub vijtsam Smart Maps. Tom qab ntawd koj tuaj yeem ntxiv, kho, lossis tshem tawm cov kev faib tawm hauv lub app rau cov chav kom muaj tseeb dua rau koj lub tsev yog dab tsi
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