Yini i-asynchronous ku-Android?
Umsebenzi ongavumelanisiwe uchazwa ngokubala okusebenza kuchungechunge olungemuva futhi umphumela walo ushicilelwe kuchungechunge lwe-UI. Umsebenzi ovumelanayo uchazwa izinhlobo ezi-3 ezijwayelekile, ezibizwa ngokuthi AmaParam, Inqubekela-phambili kanye Nomphumela , kanye nezinyathelo ezi-4, ezibizwa ngo-PreExecute , doInBackground , onProgressUpdate kanye ne-OnPostExecute.
Ngiyenza kanjani imisebenzi ye-async ku-Android?
Android AsyncTask isibonelo kanye nencazelo
- onPreExecute() − Ngaphambi kokwenza umsebenzi ongemuva kufanele sibonise okuthile esikrinini okufana ne-progressbar nanoma yimuphi upopayi kumsebenzisi. …
- doInBackground(Params) − Kule ndlela kufanele senze umsebenzi wangemuva kuchungechunge lwangemuva. …
- onProgressUpdate(Inqubekelaphambili...)
5 unyaka. 2018 г.
Iyini i-AsyncTask ku-Android enezibonelo?
Okokufundisa kwe-AsyncTask Ngesibonelo Isitudiyo se-Android [Isinyathelo Ngesinyathelo]
- Ku-Android, i-AsyncTask (I-Asynchronous Task) isivumela ukuthi siqhube iziyalezo ngemuva bese sivumelanisa futhi ngochungechunge lwethu oluyinhloko. …
- Ikilasi le-AsyncTask lisetshenziselwa ukwenza imisebenzi yangemuva ezobuyekeza i-UI(isikhombimsebenzisi somsebenzisi). …
- Ikilasi le-AsyncTask liqale lisetshenziswe kusetshenziswa indlela ye-execute().
Iyini i-AsyncTask?
I-Android AsyncTask iyikilasi elingaqondakali elinikezwe i-Android elisinikeza inkululeko yokwenza imisebenzi esindayo ngemuva futhi sigcine ukukhanya kwentambo ye-UI ngaleyo ndlela kwenze uhlelo lokusebenza luphendule kakhudlwana. Uhlelo lokusebenza lwe-Android lusebenza ngochungechunge olulodwa lapho lwethulwa.
Iyini i-interface ku-Android?
I-interface yomsebenzisi (i-UI) yohlelo lokusebenza lwe-Android yakhiwe njengochungechunge lwezakhiwo namawijethi. Izakhiwo ziyizinto ze-ViewGroup, iziqukathi ezilawula ukuthi ukubukwa kwengane yazo kumiswa kanjani esikrinini. Amawijethi ayizinto zokubuka, izingxenye ze-UI njengezinkinobho namabhokisi ombhalo.
Iyini i-HandlerThread ku-Android?
Uzosebenzisa i-HandlerThread uma ufuna ukwenza imisebenzi yangemuva eyodwa ngesikhathi futhi ufuna ukuthi leyo misebenzi izosebenza ngohlelo lokwenziwa. Isibonelo uma ufuna ukwenza imisebenzi eminingi yasemuva yenethiwekhi ngayinye ngayinye.
Yini umsebenzi ku-Android?
Umsebenzi umele isikrini esisodwa esinokusetshenziswa kubonwa njengewindi noma ifremu ye-Java. Umsebenzi we-Android uyingxenye yekilasi le-ContextThemeWrapper. Uma usebenze ngolimi lokuhlela lwe-C, C++ noma i-Java kufanele ngabe ubonile ukuthi uhlelo lwakho luqala ku-main() function.
Yiziphi izinhlobo ezimbili eziyinhloko zentambo ku-Android?
Uchungechunge ku-Android
- I-AsyncTask. I-AsyncTask iyingxenye eyisisekelo ye-Android yokulutha. …
- Abalayishi. Izilayishi ziyisixazululo senkinga eshiwo ngenhla. …
- Isevisi. …
- I-IntentService. …
- Inketho 1: I-AsyncTask noma izilayishi. …
- Inketho 2: Isevisi. …
- Inketho 3: I-IntentService. …
- Inketho 1: Isevisi noma Isevisi Yenhloso.
Iyini i-async task loader ku-Android?
Sebenzisa isigaba se-AsyncTask ukuze wenze umsebenzi ongavumelaniyo, osebenza isikhathi eside kuchungechunge lwesisebenzi. I-AsyncTask ikuvumela ukuthi wenze imisebenzi yangemuva ochungechungeni lwesisebenzi futhi ushicilele imiphumela kuchungechunge lwe-UI ngaphandle kwesidingo sokukhohlisa imicu noma izibambi ngokuqondile.
Zingaki izinhlobo zezinsizakalo ezikhona ku-Android?
Kunezinhlobo ezine ezihlukene zamasevisi e-Android: Isevisi Eboshiwe - Isevisi eboshiwe iyisevisi enenye ingxenye (imvamisa engumsebenzi) eboshelwe kuyo. Isevisi eboshiwe inikeza isixhumi esibonakalayo esivumela ingxenye eboshiwe kanye nesevisi ukuthi ixhumane.
Kuyini ukusetshenziswa kwesibambi ku-Android?
Isibambi sikuvumela ukuthi uthumele futhi ucubungule umlayezo kanye nezinto eziSebenzayo ezihlotshaniswa ne-MessageQueue yochungechunge . … Kukhona izinto ezimbili eziyinhloko ezisetshenziswa Isibambi: (1) ukuhlela imilayezo nezinto eziqhutshwayo ezizokwenziwa esikhathini esithile esizayo; kanye (2) nokufaka emugqeni isenzo okufanele senziwe kuchungechunge oluhlukile kunolwakho.
Uyini umehluko phakathi kwesevisi ne-AsyncTask ku-Android?
Isevisi: Inqubo yangemuva. Isetshenziswa uma kufanele wenze ukucubungula okungenayo i-UI ehlotshaniswa nayo. isevisi ifana nomsebenzi odla isikhathi eside kodwa umsebenzi we-Async usivumela ukuthi senze imisebenzi emide/engemuva futhi sibonise umphumela wawo kuntambo ye-UI ngaphandle kokukhohlisa imicu.
Yini engingayisebenzisa esikhundleni se-AsyncTask Android?
I-Futuroid iwumtapo wezincwadi we-Android ovumela ukwenza imisebenzi engavumelaniyo nokunamathisela ama-callbacks ngenxa ye-syntax elula. Inikeza enye indlela yekilasi le-Android AsyncTask.
Iliphi ikilasi elizokwenza umsebenzi ngendlela efanayo nesevisi yakho?
Amasevisi Enhloso futhi aklanyelwe ngokukhethekile ukuphatha imisebenzi yangemuva (imvamisa ehlala isikhathi eside) futhi indlela ye-onHandleIntent isivele isetshenziswe kuchungechunge olungemuva kuwe. I-AsyncTask yikilasi, njengoba negama lalo lisho, lenza umsebenzi ngendlela evumelanayo.
Uyini umehluko phakathi kwentambo ne-AsyncTask ku-Android?
Leli klasi livumela ukwenza imisebenzi yangemuva kanye nemiphumela yokushicilela kuchungechunge lwe-UI ngaphandle kokukhohlisa uchungechunge kanye/noma izibambi. Umsebenzi ongavumelanisiwe uchazwa ngokubala okusebenza kuchungechunge olungemuva futhi umphumela walo ushicilelwe kuchungechunge lwe-UI.