Ikholi ye-onStart() yenza umsebenzi ubonakale kumsebenzisi, njengoba uhlelo lokusebenza lulungiselela umsebenzi ukuze lungene ngaphambili futhi lusebenzisane. Umehluko omkhulu phakathi kwe-OnStart ne-OnCreate ukuthi i-onStart ilandela okuthiDala . i-onStart() ibizwa noma nini lapho uhlelo lokusebenza lubonakala.
Uyini umehluko phakathi kwe-OnCreate ne-OnStart Android?
i-onCreate() ibizwa ngokuthi lapho umsebenzi udalwa okokuqala. i-onStart() ibizwa lapho umsebenzi usubonakala kumsebenzisi.
Ithini indima yomsebenzi ku-Android?
Ngale ndlela, umsebenzi usebenza njengendawo yokungena yokusebenzelana kohlelo lokusebenza nomsebenzisi. Usebenzisa umsebenzi njengesigaba esingaphansi sekilasi Lomsebenzi. Umsebenzi uhlinzeka ngewindi lapho uhlelo lokusebenza ludweba i-UI yalo. … Ngokuvamile, umsebenzi owodwa usebenzisa isikrini esisodwa kuhlelo lokusebenza.
Uyini umjikelezo wempilo yomsebenzi ku-Android?
Uma umsebenzi usuqalisiwe, udlula emjikelezweni wokuphila, igama elisho izinyathelo umsebenzi oqhubeka kuzo njengoba umsebenzisi (kanye ne-OS) exhumana nawo. Kukhona izindlela ezithile zokuphinda ushaye ucingo ezikuvumela ukuthi usabele ezinguqukweni phakathi nomjikelezo wempilo yomsebenzi. I-lifecyle yomsebenzi inezifunda ezine.
Yenzani ukuqeda () ku-Android?
finish() sebenza ku-android. Ngokuchofoza inkinobho yokubuyela emuva kokuthi Umsebenzi Omusha, indlela yokuqeda () ibizwa futhi umsebenzi ucekela phansi futhi ubuyela esikrinini sasekhaya.
Iyini ukusetshenziswa kwendlela ye-onCreate ku-Android?
onCreate(savedInstanceState); ishayela indlela ku-superclass kanye ne-InstanceState egciniwe yomsebenzi uma kukhona into elimaza umsebenzi ukuze ilondolozwe ku-emosstateState ukuze uma ulayisha kabusha umsebenzi uzofana ngaphambili.
Iyini inqwaba ye-Android?
I-Android Bundle isetshenziselwa ukudlulisa idatha phakathi kwemisebenzi. Amanani azodluliswa afakwe kumephu kokuthi String keys ezisetshenziswa kamuva emsebenzini olandelayo ukuze kutholwe amanani. Okulandelayo yizinhlobo ezinkulu ezidluliswayo/ezibuyiswa ku/kusuka kunqwaba.
Yiziphi izingxenye eziyinhloko ku-Android?
Isingeniso. Kunezingxenye ezine eziyinhloko zohlelo lokusebenza lwe-Android: imisebenzi , amasevisi , abahlinzeki bokuqukethwe , nabamukeli bokusakaza . Noma nini lapho udala noma usebenzisa noma iyiphi yazo, kufanele ufake izakhi ku-manifest yephrojekthi.
Uwubulala kanjani umsebenzi?
Yethula uhlelo lwakho lokusebenza, vula Umsebenzi omusha, yenza umsebenzi othile. Chofoza inkinobho ethi Ikhaya (uhlelo lokusebenza luzoba ngemuva, esimweni sokumiswa). Bulala Isicelo — indlela elula iwukuba uvele uchofoze inkinobho ebomvu ethi “misa” ku-Android Studio. Buyela emuva kuhlelo lwakho lokusebenza (qalisa ngezinhlelo zokusebenza zakamuva).
Zingaki izinhlobo zomsebenzi ezikhona ku-Android?
Izinhlobo ezintathu kwezine zezingxenye—imisebenzi, amasevisi, nabamukeli bokusakaza—kwenziwa kusebenze umlayezo ongavumelaniyo obizwa ngokuthi inhloso. Izinhloso zihlanganisa izingxenye ezingazodwana kwenye ngesikhathi sokusebenza.
Uma indlela ye-OnPause ibizwa nge-Android?
Misa. Ibizwa lapho Umsebenzi usabonakala kancane, kodwa umsebenzisi cishe uzulazula eshiya Umsebenzi wakho ngokuphelele (lapho i-OnStop izobizwa ngokulandelayo). Isibonelo, uma umsebenzisi echofoza inkinobho ethi Ikhaya, isistimu ibiza okuthi Misa futhi okuthi Misa ngokulandelana okusheshayo kokuthi Umsebenzi wakho .
What is difference between activity and fragment?
Umsebenzi yingxenye lapho umsebenzisi ezosebenzisana khona nohlelo lwakho lokusebenza. … Ucezu lumelele ukuziphatha noma ingxenye yokusetshenziswa kubonwa Emsebenzini. Ungakwazi ukuhlanganisa izingcezu eziningi emsebenzini owodwa ukuze wakhe i-UI enamafasitelana amaningi futhi usebenzise kabusha isinqamu emisebenzini eminingi.
Yini i-savedInstanceState ku-Android?
I-savedInstanceState iyireferensi yento yenqwaba edluliselwa endleleni ye-onCreate yawo wonke umsebenzi we-Android. Imisebenzi inamandla, ngaphansi kwezimo ezikhethekile, ukuzibuyisela esimweni sangaphambilini isebenzisa idatha egcinwe kule nqwaba.
Iyini ukusetshenziswa kwe-SetContentView ku-Android?
I-SetContentView isetshenziselwa ukugcwalisa iwindi nge-UI ehlinzekwe kufayela lesakhiwo uma kukhona i-setContentView(R. layout. somae_file). Lapha ifayela lesakhiwo liyakhuphuka ukuze libukwe futhi lingezwe kumongo womsebenzi(Iwindi).
Kungani i-@override isetshenziswa ku-Android?
Ngakho-ke isizathu sokusebenzisa isichasiselo se-@Override ukumemezela ngokusobala ukukhipha indlela. Isichasiselo sayo se-Java (hhayi i-Android-specific). Uyisebenzisela ukusho ukuthi le ndlela ukubhala ngaphezulu indlela. … Umbhali ubehlose ukuthi lokhu kweqe indlela yokulingana ye-superclass, kodwa akunjalo (Uhlobo lwepharamitha kufanele lube Into ).
Ngiyisebenzisa kanjani i-GetIntent ku-Android?
ungakwazi ukubuyisa le datha usebenzisa i-getIntent kumsebenzi omusha: Inhloso yenjongo = getIntent(); inhloso. getExtra(“someKey”) … Ngakho-ke, akukona okokuphatha ukubuyisa idatha evela kokuthi Umsebenzi, njenge-onActivityResult, kodwa okokudlulisa idatha Emsebenzini omusha.