Ngabe umsebenzi we-async usebenza kanjani ku-Android?
Ku-Android, i-AsyncTask (I-Asynchronous Task) isivumela ukuthi siqhube iziyalezo ngemuva bese sivumelanisa futhi ngochungechunge lwethu oluyinhloko. Lesi sigaba sizokhipha okungenani indlela eyodwa okungukuthi i-doInBackground(Params) futhi ngokuvamile izokhipha indlela yesibili kokuthiPostExecute(Umphumela).
Uyenza kanjani indlela ye-asynchronous ku-Android?
Ukuze uqale i-AsyncTask amazwibela alandelayo kufanele abe khona ekilasini le-MainActivity : MyTask myTask = new MyTask(); myTask. ukwenza (); Kumazwibela angenhla sisebenzise isampula yegama lekilasi elinweba i-AsyncTask kanye nendlela yokusayinda isetshenziswa ukuqalisa uchungechunge lwangemuva.
Ngazi kanjani uma umsebenzi we-async uyasebenza?
Sebenzisa i-getStatus() ukuze uthole isimo se-AsyncTask yakho. Uma isimo sithi AsyncTask. Isimo. IYAQHUBEKA bese umsebenzi wakho uyasebenza.
Ngabe umsebenzi we-async usebenza kanjani ngaphakathi?
Isizathu esikhulu sokusebenzisa i-Async ukuthumela umsebenzi ngemuva. Ikwenza isebenzisa ama-executors: Abafayo bangama-Java API, aqukethe ulayini lapho imisebenzi emisha ilandelwa khona, futhi anenombolo emisiwe yemicu okufanele isebenze. Imicu ijika ngokushintshana ihlukanisa imisebenzi ukusuka kulayini futhi iyisebenzise.
Uyini umsebenzi we-async?
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.
Ingabe i-Android yenza ingemuva?
doInBackground(Params) − Kule ndlela kufanele senze umsebenzi wangemuva kuchungechunge lwangemuva. Ukusebenza ngale ndlela akufanele kuthinte noma yimiphi imisebenzi esemqoka noma izingcezu. onProgressUpdate(Progress…) − Ngenkathi senza umsebenzi wangemuva, uma ufuna ukubuyekeza ulwazi oluthile ku-UI, singasebenzisa le ndlela.
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.
Ngazi kanjani uma i-Android AsyncTask yami isiqediwe?
getStatus() ihlola ukuthi i-AsyncTask ilindile, iyasebenza, noma iphelile.
Ngimisa kanjani i-AsyncTask?
1. shayela okuthi Khansela() indlela ye-AsyncTask lapho ufuna ukumisa khona ukusebenza, ingase isekelwe ekuchofozeni inkinobho. asyncTask. khansela (iqiniso);
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.
Kwenzekani uma sibiza u-Execute () ngaphezu kokukodwa emsebenzini we-async?
Yize kungadingeki ukuthi kukhulunywe ngakho lapha, umuntu kufanele azi ukuthi inguqulo ye-Android SDK ye-Honeycomb, uma usebenzisa i-AsyncTask engaphezu kweyodwa ngasikhathi sinye, empeleni isebenza ngokulandelana. Uma ufuna ukuzisebenzisa ngokuhambisana, sebenzisa i-executeOnExecutor esikhundleni salokho. Vele wenze ikholi entsha njenge-asyncTask entsha ().
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.