Kawm Android Programmierung

Android Programmierung is not an easy skill to learn. Muaj ntau yam lus sib txawv xaiv los ntawm, xws li Java, Hom Phiaj-C, ntxhee, thiab Kotlin. Tus yuam sij yog pib thiab tsim koj cov kev txawj ntse maj mam. Tau txais kev pab thiab tswv yim los ntawm lwm tus yog qhov tseem ceeb. Muaj ob peb cov peev txheej muaj los pab koj pib.

Java

Txhim kho Android-Apps feem ntau txhais tau tias kawm code hauv Java. Koj yuav kawm tau code nrog hauv studio. Yog xav paub ntxiv, koj kuj yuav nrhiav tau hauv chav kawm, xws li cov uas muaj los ntawm Michael Wilhelm. Chav kawm no yuav pab tau koj kom paub txog ntau yam lus syntaxes thiab idioms, raws li zoo raws li yuav ua li cas siv ntau yam cuab yeej hauv.

Android app developers feem ntau siv Java vim hais tias nws yog ib qho yooj yim mus kawm thiab muaj ntau yam tseem ceeb nta uas ua rau nws ib hom lus zoo rau hauv kev loj hlob. These include platform independence, object-orientation, and security. Java also has a wide variety of libraries and other features, which makes it easier to create and maintain applications than other programming languages.

Android supports two types of strings: native and managed code. Native code is written in Java or Kotlin and compiles into bytecode in the same way as Java. o, Android also supports Kotlin. Kotlin is a programming language that uses the Java language and compiles to bytecode in a similar manner to Java.

Another important feature in Kotlin is type inference. It lets the compiler automatically detect the type of a variable from its initializer, reducing the need for manual checking. Kotlin also has a compiler plugin that helps you process annotations easily.

Hom Phiaj-C

Lub Hom Phiaj-C yog tus thawj programming lus rau iOS no thiab OS X. Nws yog ib tug superset ntawm C thiab muab cov khoom-taw qhia muaj peev xwm thiab ib tug dynamic runtime. Nws inherits lub C lus primitive hom tab sis kuj ntxiv ib chav kawm-txhais syntax thiab lus-theem kev txhawb nqa rau khoom graph tswj. Nws kuj muaj dynamic typing thiab defers ntau lub luag hauj lwm rau lub runtime.

Lub hom phiaj-C tau tsim los ntawm Stepstone hauv xyoo 1980 thiab yog qhov de facto programming lus rau iOS thiab macOS tau ntau xyoo. Lub mashrua mulle-objc project yog kev rov ua dua ntawm cov lus uas txhawb nqa GCC thiab Clang / LLVM compilers. Nws tseem txhawb nqa Windows, Linux, thiab FreeBSD.

Cov lus txhawb nqa dynamic typing, tso cai rau koj hloov qhov loj me ntawm koj chav kawm thiab tseem khaws cov binary compatibility. Nws kuj txhawb nqa piv txwv variables uas yog synthesized nyob rau hauv runtime thiab tshaj tawm nyob rau hauv ib chav kawm interface. Ntxiv mus, Nws muaj ib tug ceev enumeration syntax uas yog functionally sib npaug rau NSEnumerator khoom.

Thaum Lub Hom Phiaj-C muaj ntau yam zoo tshaj Swift, Nws tseem tsis yog qhov zoo tshaj plaws xaiv rau txhua tus programmer. Cov lus yog tsis user-phooj ywg, Thiab nws yog ib qho nyuaj rau debug yog hais tias koj tsis paub yuav ua li cas siv nws kom raug. Qhov loj tshaj disadvantage yog hais tias nws yog tsis raws li haib li cov lus Swift, Tab sis nws yog ntau yooj yim thiab yoog raws.

ntxhee

Programming Android apps yuav ua tau nyuaj yog hais tias koj tsis paub yuav ua li cas code nyob rau hauv Swift. Cov lus tshiab yog raws li nyob rau hauv lub LLVM lus, Uas yog ib tug qhib qhov chaw compiler. Nws generates sib dhos code rau ARM processors thiab converts uas mus rau tshuab code. Android haiv neeg NDK generates binary linking tiv thaiv cov ntaub ntawv ntawd generated khoom, uas yog ces ntim rau hauv ib tug Android app.

Swift yog ib tug multi-paradigm programming lus uas yuav siv tau los tsim Android thiab iOS daim ntawv thov. Nws yog ntau muaj kev nyab xeeb tshaj lub hom phiaj-C thiab muaj ntau nta. Nws yog tseem yooj yim mus kawm. Nws cov kev them nyiaj yug rau Cocoa moj khaum, suav nrog Cocoa Kov, pab cov neeg tsim khoom saib ua ntej lawv cov software ua ntej tso nws. Nws tseem siv lub Hom Phiaj-C runtime thiab LLVM compiler moj khaum.

Qhov teeb meem ntawm cov tsev qiv ntawv hla platform yog ib qho paub zoo, thiab tsis yog tshwj xeeb rau Android. Piv txwv li, kev lag luam video game tau siv cov tsev qiv ntawv hla platform rau kaum xyoo. Cov tsev qiv ntawv tseem ceeb yog OpenGL, SDL, thiab OpenAL. Kuj tseem muaj cov tsev qiv ntawv rau fonts, suab, thiab ua duab. Rau kev sib txuas lus, lub platform siv cURL. Lwm lub tsev qiv ntawv tseem ceeb yog Chipmunk, uas muab lub cav physics rau PureC.

XML

XML yog cov lus cim uas tuaj yeem siv los piav qhia txog ib qho kev teeb tsa thiab ntxiv cov ntsiab lus rau cov ntaub ntawv. Nws tau siv dav hauv kev lag luam tshaj tawm rau kaum xyoo thiab tseem tuaj yeem siv hauv Android programming. Ntawm no yog ib qho kev taw qhia rau XML rau Android programming. Nws yog ib qho tseem ceeb ntawm kev tsim cov neeg siv nplua nuj rau koj Android app.

Hauv Android Studio, Koj yuav pom ntau yam ntaub ntawv XML uas ua haujlwm rau lub hom phiaj sib txawv. Piv txwv, Koj yuav muaj ViewGroup, LinearLayout, thiab RelativeLayout, uas muaj cov View thiab tag nrho nws cov me nyuam widgets. Koj tseem yuav pom tias ib tug ViewGroup yog nested nyob rau hauv ib tug Saib, thiab ib tug View muaj ib tug Saib. Cov peb hom ntaub ntawv no yuav ua rau ib qho screen nyob rau hauv ib tug Android app.

XML yog ib lub teeb markup lus uas khaws cov ntaub ntawv siv nyob rau hauv ib daim ntawv thov. Xav txog nws zoo li ib tug spreadsheet: Nws khaws tag nrho cov ntaub ntawv thiab layout ntawm kem thiab teb. Nws kuj tuav tej kev xam uas tau ua. XML kuj yog siv los txhais layouts, xim, styles, thiab qhov ntev nyob rau hauv Android daim ntawv thov. XML yog ib hom lus yooj yim los kawm thiab siv nyob rau hauv ua ke nrog ib tug programming lus.

Sau npe rau Android App Developer chav kawm

Yog tias koj xav kawm yuav ua li cas rau qhov kev pab cuam Android app, koj tau tuaj rau qhov chaw zoo. Peb chav kawm online yog tsim nyob ib ncig ntawm ib pawg ntawm 35 modules uas npog txhua yam ntawm kev txhim kho app. Thaum koj tsis xav tau ntau qhov kev paub programming kom muaj peev xwm nkag siab thiab siv chav kawm no, koj yuav tsum tsawg kawg muaj qee qhov kev paub txog computer programming.

Ntxiv rau kev nkag siab txog lub hauv paus ntsiab lus ntawm programming, koj tseem yuav kawm txog lub operating system thiab cov qauv ntawm ib qho app. Qhov no yuav tso cai rau koj los tsim cov apps uas sib xws nrog ntau lub operating systems. Qhov kev cob qhia tseem yuav npog yuav ua li cas sau cov cai nyeem tau. Qhov no yog ib qho tseem ceeb rau kev tsim cov apps rau mobile pab kiag li lawm.

Android yog ib tug nrov mobile operating system. Vim li ntawd, Android app developers yog nyob rau hauv siab thov thiab muaj zoo hauj lwm prospects. Koj mam li kawm lub hauv platform, Android txoj kev loj hlob ib puag ncig, thiab cov Kotlin programming lus.

Vim li cas Kotlin

Kotlin yog ib tug programming lus rau hauv uas yog tag nrho tshaj Java 6. This means that Java developers will be able to write Android applications and use Kotlin. tiam sis, since Android is not a single platform, it may be difficult for Java developers to switch to Kotlin.

One example of an Android app written in Kotlin is the Pinterest app. Kotlin is a great way to write apps for mobile devices. If you want to learn more about this programming language, read some of these articles. Christina Lee writes about her experience using the language. Tsis tas li ntawd, you can visit the Kotlin website to see a growing list of companies that use it.

Kotlin is a statically-typed programming language that runs on the Java virtual machine. This language is open source and has an emphasis on safety, clarity, and interoperability. It has a lot of potential to improve Android development, and it has gained a loyal developer base.

Developers who are familiar with Java can easily move to Kotlin, as it requires only a few hours to learn. It also supports functional programming and coroutines, which is a great plus for Android developers. It also reduces the amount of code a developer needs to write.