Funda Okuyisisekelo kwe-Android Apps Programmieren

Ngaphambi kokuthi uqale ukubhala ikhodi, kufanele wazi izisekelo zezinhlelo zokusebenza ze-Android programmieren. Lesi sifundo sizohlanganisa izihloko ezinjengokwenza i-Zitate-App, Ukusebenzisa Izinhloso, Ukudala Ibha Yohlelo Lokusebenza, kanye nokwenza kabusha. Ungase futhi uthole okokufundisa kuwusizo uma usujwayele i-HTML. Nokho, uma usadidekile ngalesi sihloko, ungase uthande ukucabangela ukuhlola lesi sihloko mayelana nokudonsa nokuwisa.

Ukusebenzisa Izinhloso

Izinhloso ziyimilayezo ecacisa isenzo, futhi asebenza njengabaxhumanisi phakathi kwezingxenye ezihlukahlukene ze-Android. Uhlelo lokusebenza lwe-Android lunezingxenye ezimbalwa, kuhlanganise Imisebenzi, Amasevisi, kanye Nezamukeli Zokusakaza. Izinhloso zikuvumela ukuthi ushintshe phakathi kwemisebenzi, Ngokwesibonelo, ngokucela ukuthi Umsebenzi owodwa uqalise omunye. Ngokufanayo, ingxenye eyodwa ingacela ukuthi enye yenze isenzo, njengokulanda ifayela. Nokho, kukhona ukuxwaya okufanele kuthathwe uma usebenzisa izinhloso kuhlelo lwakho lokusebenza.

Izinhloso ziyindlela elula yokutshela isistimu ye-Android ukuthi yenzeni. Angasetshenziselwa ukukhomba izehlakalo ezenzeka kuhlelo lokusebenza, njengalapho umsebenzisi echofoza inkinobho noma abelana nge-URL yekhasi lewebhu. Zingasetshenziswa futhi ukwethula izingxenye ezithile. Isibonelo salokhu uhlelo lokusebenza lweselula olunemisebenzi emibili, umsebenzi A kanye nomsebenzi B. Umsebenzi ocushwe ngenhloso ungaqalisa umsebenzi B ngokumane udlulisele i-URL kumsebenzi A.

Ukusebenzisa izinhloso ukuhlela izinhlelo zokusebenza ze-Android kuyinqubo yokuhlanganyela, futhi kubalulekile ukuqinisekisa ukuthi uzisebenzisa ngendlela efanele. Uma ingxenye ishoda, isevisi ye-Deep Link izoshayela i-Google Play Isitolo futhi ithole uhlelo lokusebenza lapho. The process is then repeated until the desired action is completed. Ngenjwayelo, this method is the easiest to understand. And it will allow you to create highly customised applications. Intents are useful in creating collaborative apps, because they help developers to get more out of their app.

Intents are broadcast messages that the Android system listens to. The application can register to events and react to them. Intents contain header data and additional data based on the Bundle class. You can retrieve these by calling the getExtras() indlela. And that’s all there is to it! So if you’re interested in developing a mobile app, check out these tips and get started today!

Ukudala Ibha Yohlelo Lokusebenza

Creating an App Bar with Android apps consists of implementing a special type of symbolleiste for navigation, search, actions, and branding. Ivumela uhlelo lwakho lokusebenza ukuthi luhluke kwabaqhudelana nabo futhi lunikeze umsebenzisi ulwazi olubalulekile mayelana nohlelo lwakho lokusebenza. Ibha yohlelo lokusebenza isiza ukuqinisekisa ukubukeka nokuzwakala okufanayo phakathi kwezinhlelo zokusebenza, kwenza kube lula ukuthola izenzo ezibalulekile, futhi ikhuthaza ukuziphatha okungaguquki. Kodwa ungaqala kanjani?

Isinyathelo sokuqala siwukudala Umsebenzi ozoqukatha ibha yamathuluzi. Ungakwazi ukuyengeza kokuthi MainActivity noma Isakhiwo Somsebenzi. Kungenjalo, ungakha Ibha yamathuluzi futhi uyibonise ku-App Bar. Ungaphinda ukhethe indawo yebha yamathuluzi. Konke kuncike ezidingweni zakho. Ku-Android, ungakwazi ukwengeza ibha yamathuluzi kumsebenzi wakho noma ku-MainActivity.

Ibha yohlelo lokusebenza esebenzayo iyingxenye evamile yohlelo lokusebenza lwe-Android, kodwa ishoda ukusebenza. Ibha kufanele ibe nezenzo ezichazwe kumenyu ye-XML, ebhaliswe ku-onCreateOptionsMenu() indlela. Ngemuva kokuthi udale Umsebenzi, ungasebenzisa izenzo ukuphendula okokufaka komsebenzisi. Izenzo ezichazwe kusisetshenziswa semenyu kufanele-ke zisetshenziswe kumqondo ohambisanayo.

Ibha yesenzo kuzinhlelo zokusebenza ze-Android iyingxenye ebonakalayo ephezulu yohlelo lwakho lokusebenza. Ihlinzeka ngesakhiwo esingaguquki kuhlelo lwakho lokusebenza futhi iqukethe izici ovame ukuzisebenzisa. I-Google yethule i-ActionBar ku-Android 3.0 (I-API 11), futhi isibe yingxenye ebalulekile ye-ecosystem ye-Android. Ngaphambilini, ibibizwa nge-AppBar futhi iqukethe kuphela igama lohlelo lwakho lokusebenza kanye nomsebenzi obuwenza njengamanje. Nakuba yayidumile, imenyu yezinketho inikeze izinketho ezinomkhawulo kakhulu zokwenza ngokwezifiso.

Ukusebenzisa i-Refactoring

Ukwenza kabusha izinhlelo zokusebenza kuyindlela enhle yokwenza ikhodi yakho ibe lula ukuyigcina nokufunda. Ngokuvamile, isinyathelo sokuqala ekubhaleni kabusha isicelo ukuthola zonke izingxenye ezidinga izinguquko. Lokhu kungonga isikhathi esiningi nemali. Uma ungenaso isikhathi esiningi noma ungenayo izinsiza, ungase futhi ucabange ukwakha uhlaka ukuze wenze ikhodi yakho ilawuleke.

Ukwenza kabusha izinhlelo zokusebenza ze-Android kwenza ikhodi iqondeke kalula. Onjiniyela bangakwazi ukuhlanza kalula izendlalelo ezikhethiwe zekhodi, ngenkathi igcina ukwakheka okuphelele kwe-codebase. Le ndlela ilungele ukwenza kabusha izinhlelo zokusebenza zedeskithophu eziyifa zibe izinhlelo zokusebenza zeselula. Amanye amaphrojekthi okuthuthukisa uhlelo lokusebenza lwe-Android anomthombo ovulekile asebenzisa i-Leaffactor toolset. Ukuyizama, thumela isicelo sokudonsa kuphrojekthi esemthethweni. Isethi yamathuluzi izokhiqiza ngokuzenzakalelayo izinguquko zekhodi futhi inikeze imibhalo.

Esinye isinyathelo esibalulekile sokwenza kabusha uhlelo lokusebenza lwe-Android ukusebenzisa i-IDE. I-Eclipse i-IDE esunguliwe, futhi inikeza ukusebenza okudidiyelwe kanye nezinketho zokuphinda zenziwe kabusha. Lawa mathuluzi azokusiza ukuthi wenze ngokuzenzakalelayo imisebenzi okungenzeka ibe yinkimbinkimbi futhi uthumele uhlelo lwakho lokusebenza ngokushesha. I-Juno ingumthombo omuhle wolwazi wokuthi isetshenziswa kanjani i-Eclipse. Ungathola futhi umbono wokuthi ziyini izici ze-Refactoring. Ngokulandela lezi zinyathelo, uzokwazi ukuthuthukisa inqubo yakho yokuthuthukisa uhlelo lokusebenza lwe-Android.

Ukuze wenze kabusha uhlelo lokusebenza lwe-Android, gqamisa ikhodi ofisa ukuyenza kabusha bese uyichofoza kwesokudla. Khetha inketho ye-Refactor kumenyu yokuqukethwe. Le nketho ikunikeza izinhlobonhlobo zezinketho ongakhetha kuzo. Okunye okuwusizo kakhulu ukuqamba kabusha. Ngokuchofoza kwesokudla ifayela bese ukhetha “Qamba kabusha” izoshintsha igama lalelo fayela. Ungabe usukhetha inketho efanele yokwenza kabusha.

Idala Ibha Yohlelo Lokusebenza lwe-Android

Ibha yohlelo lokusebenza lwe-Android ingxenye yohlelo lokusebenza ebonisa izici ezihlukahlukene, njengebha yamathuluzi, isakhiwo sethebhu, kanye nokubukwa kwesithombe. Ingashumeka kumzali we-CoordinatorLayout ukuze ulawule ukuziphatha kwayo lapho iskrola. Umphathi we-CollapsingToolbarLayout uhlinzeka ngamaleveli engeziwe okulawula ibha yohlelo lokusebenza. Ngaphezu kwalokho, ibha yohlelo lokusebenza ingenziwa ngokwezifiso ukuze ibe nombala wangemuva nesithonjana.

Enye indlela yokwenza ibha yesenzo ibukeke kangcono ukusebenzisa iwijethi yebha yamathuluzi evela kulabhulali yosekelo. Ngale ndlela, uzoba nokuziphatha okungaguquki kuwo wonke amadivayisi we-Android. Enye inzuzo ukuthi iwijethi yebha yamathuluzi ingahlinzeka ngomuzwa wedizayini ebalulekile ku-Android 2.1, kanti ibha yesenzo somdabu ngeke isisekele isitayela kuze kube yi-Android 5.0. Ukwengeza lesi sinqunjwana kuhlelo lwakho lokusebenza, kufanele usebenzise ilabhulali yosekelo lwe-v7 appcompat.

Ukudala Ibha Yohlelo Lokusebenza lwe-Android kungaba umsebenzi oyinselele ngisho nakunjiniyela onolwazi olunzulu. Ziningi izici okufanele zicatshangelwe, kusukela embhalweni wangempela kuya ekubukekeni kwezithonjana. Nakuba kubalulekile ukukhumbula ukuthi umklamo kumele usebenze futhi ujabulise iso, ibha ene-interface ehlanganisiwe ayikhangi. Ngenhlanhla, kunezindlela zokwenza ibha yohlelo lokusebenza ibukeke kangcono ngaphandle kokusebenzisa ibha yamathuluzi.

Enye indlela ewusizo yebha yohlelo lokusebenza eyenziwe ngokwezifiso ukusebenzisa itimu yangokwezifiso. Le timu kufanele inwebe itimu yebha yesenzo ekhona. Kufanele futhi isethe i-android:Isici se-windowsActionBarOverlay sibe yiqiniso. This will ensure that the bar is visible when scrolling downward. This method allows you to hide and show the bar based on a specific layout. You can also use custom CSS snippets for a custom theme.