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 kawm txog kev txhim kho Android app, koj tuaj rau qhov chaw zoo. Hauv tsab xov xwm no, koj yuav kawm txog Java, Kotlin, Fragmentation, thiab haiv neeg siv interfaces. Koj tseem yuav kawm txog Android SDK, GDR, thiab Fragmentation. Vam tias, cov ntaub ntawv no yuav pab koj pib tsim cov apps tsis muaj sijhawm. Yog tias koj muaj qee cov lus nug, txhob ntshai nug!
Yog tias koj tab tom npaj tsim Android app, ces Java tej zaum yuav yog hom lus zoo rau siv. Java yog ib hom lus programming siab, thiab nws cov syntax zoo ib yam li cov lus ntawm tib neeg. Raws li qhov tshwm sim, Java daim ntawv thov yog hloov tau yooj yim thiab scalable, thiab tuaj nrog lub tsev qiv ntawv nplua nuj ntawm cov qauv tsim qauv thiab cov kev coj ua zoo tshaj plaws. Java kuj yog qhib qhov chaw, uas txhais tau tias nws muaj peev xwm siv tau reusable code nyob rau hauv modular tej yaam num. Java rau Android app kev txhim kho yog ib hom lus programming tshaj plaws rau Android app kev txhim kho.
Yog tias koj tab tom xav txog Java rau Android app txhim kho, koj yuav tsum nkag siab qhov sib txawv ntawm cov lus programming no thiab Kotlin. Yog tias koj tab tom txiav txim siab Java ua koj thawj qhov kev xaiv, nco ntsoov tias nws tseem ntau dua 20 xyoo laus dua Kotlin. Tseem, koj yuav tsum tau kawm ob hom lus no yog tias koj xav tau tshaj tawm ntawm lub platform no. Tej zaum koj yuav xav tsim ib qho app uas siv ob hom lus.
Java muaj ntau yam zoo dua Kotlin, tab sis nws kuj yog ib qho nyuaj me ntsis los kawm. Thaum Java tau siv dav dua hauv kev txhim kho Android, Kotlin tsis tshua siv. Thaum Kotlin yooj yim kawm dua Java, it’s a good choice for Android development. Kotlin is easier to learn than Java and is the language Google recommends for Android development. It also provides more support for Android development.
If you are planning to use the Kotlin programming language for Android app development, there are a few things you should know first. While it does offer several advantages, it does require a bit of learning time. It is not as easy as other programming languages and will require rewriting projects and optimizing them. Then again, if you are serious about creating a killer app, you will be ready to tackle any challenge that comes your way. Another thing you should remember is that Kotlin will make the process of implementing your project faster.
Txij li nws cov lus qhia ntawm Google I / O lub rooj sib tham hauv 2017, Kotlin tau txais txiaj ntsig ntau thiab tau nrawm dhau Java ua hom lus nrov tshaj plaws rau Android. Cov lus tshiab no yog cov ntsiab lus thiab tsis tshua muaj rau boilerplate code. Nws kuj txo qhov kev xav tau ntawm kev sim dav dav thiab kev saib xyuas lub app, ua rau muaj cov kab mob tsawg dua thiab kev sib tsoo me me. Piv rau Java, Kotlin code yog me dua thiab ntau dua.
Thaum Java tau ntev ua lub hauv paus rau cov khoom siv hauv Android, Cov lus tshiab Kotlin tau ua rau ntau tus neeg tsim khoom rov xav txog lawv txoj hauv kev los tsim cov apps. Kotlin yog tsim los ntawm Lavxias teb sab startup JetBrains thiab yog tsim los ntawm Java virtual tshuab. Nws yog ib tug ntaus ntawv, functional programming lus uas khiav ntawm Java virtual tshuab. Lub hom phiaj ntawm Kotlin yog txhawm rau muab lub sijhawm sau ua ke sai dua thiab ua kom cov apps yooj yim los tswj.
Siv Fragmentation hauv Android app kev txhim kho tso cai rau cov neeg tsim khoom siv callbacks los tswj lub neej ntawm cov khoom tawg. Cov txheej txheem no feem ntau siv hauv Android apps, thiab suav nrog onCreate, onStart, ntawm Pause, ntawmDestroy, thiab ntawm Resume. Kev siv callbacks tuaj yeem ua rau koj cov fragments modular, nyob ib leeg, thiab reusable Cheebtsam. Lawv kuj tuaj yeem pab koj lub app teb rau kev hu xov tooj sib txawv thiab kev xav, thiab tuaj yeem dhau qhov kev sib cav rau niam txiv txoj haujlwm pib.
Hauv Android app kev txhim kho, ib feem yog ib feem ntawm kev ua haujlwm tus neeg siv interface. Nyob ntawm qhov screen loj ntawm lub cuab yeej, fragments yuav tsum ywj siab thiab modular. Fragments yog reusable ntawm cov dej num, thiab tuaj yeem ua ke los tsim ib qho kev ua si. Ntxiv rau, fragments tuaj yeem rov qab siv dua nyob rau hauv ntau qhov screen. Fragmentation ua rau nws yooj yim dua rau cov neeg tsim khoom los tuav lub app tus lej.
Siv Fragments hauv Android app kev txhim kho tshem tawm cov teeb meem ntawm cov ntsiab lus uas tsis yog null. Es tsis txhob ua fragments qub txeeg qub teg los ntawm Kev Ua Haujlwm, koj tuaj yeem tsim cov Fragments cais rau txhua daim ntawv. Fragments tsuas muaj UI lub luag haujlwm tshwj xeeb rau daim foos ntawd, yog li koj qhov Kev Ua Phem tuaj yeem xa mus rau UI lub luag haujlwm rau Fragment tsim nyog. Ib qho fragment tuaj yeem muaj ntau yam, xws li cov nyees khawm lossis cov ntawv qhia zaub mov.
Fragmentation hauv Android app txhim kho yog qhov teeb meem tsis tu ncua. Ntau lub xov tooj ntawm tes manufacturers yog customizing lub Android OS kom haum ib tug tshwj xeeb ntaus ntawv. Qhov no ua rau ntau qhov sib txawv ntawm cov cai, uas txhais tau hais tias txawv versions ntawm ib daim ntawv thov yuav khiav txawv. Rau developers, qhov no tuaj yeem yog qhov kev sib tw loj heev, tab sis Google tab tom ua haujlwm los kho qhov teeb meem no. Los ntawm kev muab ib qho kev pab cuam Android compatibility, cov neeg tsim khoom tuaj yeem lim tau yooj yim cov cuab yeej thiab cov qauv uas lawv tuaj yeem tsim kho.
Cov neeg siv haiv neeg sib cuam tshuam hauv Android app kev txhim kho tuaj yeem tsim los ntawm kev koom nrog Java programming thiab XML. Android views muab kev coj tus cwj pwm, thaum ViewGroups yog cov khoom ib txwm muaj uas tuaj yeem ntxiv cov qauv tsim lossis tus cwj pwm coj. Piv txwv li, PageViewer viewgroup muab kab rov tav swiping hauv browser, zoo ib yam li Google app. Daim ntawv thov tuaj yeem siv ob qho tib si saib thiab ViewGroups kom ntseeg tau tias nws yooj yim siv.
Txawm hais tias muaj ntau qhov zoo rau kev siv hybrid tsim mus kom ze, nws tsis yog ib qho kev daws teeb meem zoo tshaj plaws. Ntau tus neeg tsim tawm iOS pom tias tus nqi tsim ib qho app rau ob lub platform yog txwv tsis pub. Hmoov zoo, ob peb lub moj khaum muaj zog ua rau nws yooj yim dua rau kev siv ib txwm UI tsim hauv Android. Tab sis cov neeg tsim qauv UI yuav tsum xav txog tias UI cov txheej txheem sib txawv rau iOS thiab Android. Kev siv Android kev cai yuav xav tau kev siv zog ntxiv, tshwj xeeb tshaj yog tias lub app lub hom phiaj tseem ceeb yog tsom rau cov neeg siv iPhone.
Cov neeg siv Android tuaj yeem nkag mus rau daim ntawv thov los ntawm kev kho vajtse interface thiab OS tus neeg siv interface (UI). UI yog ib qho kev pom ntawm ib qho system, xws li lub vijtsam hauv tsev thiab kev ceeb toom vaj huam sib luag. UI yog ob qho tib si kho vajtse thiab software thiab tuaj yeem suav nrog cov ntawv thov windows, Cov nplooj ntawv web, mobile app cov ntxaij vab tshaus, thiab ntsuas thiab teeb. Native UIs also offer the advantage of being fully functional on a variety of devices.
There are two main types of testing an Android app: unit tests and integration tests. Unit tests are smaller pieces of code that verify functionality; end-to-end tests run on a real device, while integration tests verify how the app works across all modules. Integration tests should account for around 20% of the total number of tests. Yog tias koj yog tus tsim tawm tshiab, it can be helpful to use a testing codelab to learn more about this process.
You’ll need to create an APK before you can start writing tests. Instrumented tests run on the device and require that you include the Android framework, which is available through the Android ADB. To make sure everything works, you’ll want to make sure you have the required test libraries. If your test library doesn’t include these, you’ll have trouble integrating it. Hmoov zoo, instrumented tests are incredibly useful and are easy to use.
To run tests locally on your development machine, use Robolectric. This framework is designed to run on a local host and follows best practices for mocks. Robolectric is particularly useful for testing Android apps because it allows you to run tests on Android dependencies and is fast and clean for unit testing. It can also simulate runtime on Android 4.1 and supports community-maintained fakes. Txoj kev no, you can test your code without an emulator.
There are many marketing channels for Android apps. The first and foremost is the Google Play. This marketplace is the largest of its kind and allows developers to distribute their apps in a variety of ways. In addition to the App Store and Google Play, Android has a few other distribution channels. If your app aims to reach the largest audience, it would be a good idea to explore them all. There are also various other ways to distribute your app, including mobile marketplaces like the Amazon App Store, the iTunes Store, and the Play Store.
Once your Android app is complete, you can distribute it to your testers. For this, you will need to create a simple frontend that will enable testers to install the app. Once the testers have downloaded the app, they must sign in to their accounts or open an email on their mobile devices. Qhov no tuaj yeem siv sijhawm ntev heev thiab yuav ua rau tsis muaj kev hloov pauv. Xwb, koj tuaj yeem siv cov kev faib khoom sib txawv.
Lwm qhov txiaj ntsig ntawm Android app txhim kho yog tias nws yooj yim los kho. Vim hais tias Android yog lub platform customizable heev, developers tau yooj yim tailor nws kom tau raws li lawv cov kev xav tau kev lag luam. Ntxiv mus, nrog Android, tsis muaj ib qho kev faib tawm platform, yog li cov neeg tsim khoom tuaj yeem tsim ntau qhov kev faib tawm rau lawv cov apps. Qhov no txhais tau tias lawv tuaj yeem ncav cuag ntau lub hom phiaj cov neeg tuaj saib, uas yog qhov zoo rau txhua qhov kev lag luam. Thiab, vim lub platform yog qhib qhov chaw, qhov no ua rau cov tuam txhab tsim ntau txoj kev xaiv thiab kev ywj pheej los tsim Android apps.