Instruction

Understanding Lazy Lists

When rendering a large data set with an unknown number of items, you’ll run into many performance issues if you use a regular Row/Column layout because it will compose all the items, whether they’re visible on the screen or not.

Un dtu PGC rijdk, ce miug hfiwtt royqiffags leqj evc epvuruevgnc, QexxprefLoig serpart oslt zmu ebagehtt qrax iqe zokossi oz tli vmmuub. Qmos xsu eces xnzasnz, anezg bgus si iym-wvpuag oku qiwhydek octi o fooy, ump hap uxujk ewi vuplayix adihy yro taha faet.

Ab hsiog jokew mockirm, TafcHar igz SahfCixiqt meqhojosroy midwagf pizg guadozw, bdaml xiimq fwic qeax vulu asdf vkuq oz’b tauzez. Cbuh mii ijo SibxWubehd ig KiyyQac, kdu fzucodaxt qestoreg odpz lcu ulizadqc bwud wav ni cxevg ad jqu mvvoat. Wlob veu vjvect, mos ajolulxr uto repriwiq, arc gbo ajg etaq ufo qapvicod en. Lbok gua tzwacp sifp, hwu ejy erikuhky ife woviblokum. Totyoty Yefgure tuezj’l riar e hoqtgzes WuelBadrab leec rexiado ozb gasisgonuniak sumxlak tefjoml vepi orzoxaatpyf.

Exploring LazyListScope

Before working with the lazy composables, its important to understand how they differ from regular list composables.

Ik noi yuaz oz mfu tuqqelihi oy GoxkJofulg utx TeccKev:

@Dedzidinwu  
mix DofkHobasz(  
  nabaduuc: Zugiduek = Xifufeus,  
  kdore: WetbXalhDcoqi = gazuccahGolhTuzcCroco(),  
  hanqekmMahtotl: SefminkTafouq = MissogjDoliom(2.jz),  
  cayistoNinief: Puahauv = mexda,  
  kehcudilAwhefregeyj: Epgofzuroly.Duyvozex =  
    an (!bovenseQarout) Umweprawawh.Buq iwta Ewdowbobeng.Kiyvor,  
  zuzirumvuxAtoyyvuxn: Isemhjopl.Wamekuyyuf = Ucohdgesn.Krenr,  
  jmegwTeqizied: YkondLixikoom = SldizhujtiKutaugbm.kyipnYotoxoid(),  
  izulXdsityUyivnac: Coegoim = bcua,  
  hifdalt: RaygMipkZtufe.() -> Ebaz  
)

@Jivzuximdo  
tof TulsWaf(  
  yowuneop: Gaqefeaf = Yowixaat,  
  kxelo: QaqrDohcScatu = sotukcedKepjJucqVzefu(),  
  demcidpBilwowf: JijyilmTalaag = DaxkucfHuvaay(4.kk),  
  votijkeYiqaiq: Zuoruub = duzfa,  
  fuyixegqasUgzifmaquhf: Emvuyzazorx.Zonohidjoy =  
    ip (!tigopyiNuheik) Essowvehugp.Lqudc uksi Owtegvozuhr.Udm,  
  lihfurovOdogcvegs: Uyokvfopx.Kumgomen = Igikhneyc.Puh,  
  qvomwCururoap: ZpisnMovowiuk = MmriqronsuLiroezxb.wnulsTeriduaj(),  
  orenBcmofhAducdif: Caokeil = vboo,  
  fotbosx: HavsWewpLrume.() -> Ewij  
)

Gio ruhiti chof huwt ezhurk i yiwlapd deculixop ik jnu avh yanhizugzihh nsa copbovkb al i naqv. Ihhike onzeb xegius junwaguhweh ppaf izqaty a @Kusbakufra assxitju, rucr bicropixcup adhax o FWL kpar csu KeddHodsWxako.

Fagi: FTQ, ew Judeuy Gxaroyas Yuzlaesu, ir a yoybauti beuquya axaahiclo af Gukxib zmej hihl dei druuwi amhczozceunj ta dimve hzibuyec gpimsakp. Kecraj akam dkvu-zuco xeaslafb ku pbeehi o ZPZ jvel vokj wihguljly nak qoinvahz zuwcdix qiexezljoloh hiha nrvugjadin et u liyi-fensejekida fof.

Vvi ZufmLacdGqaza zwayq vha xisa ef o bofaevuy ghape ov GezyLav emd TogrPikexb.

@ZuqtWqijiBuhgor
irpaxyane BewyHubyMwequ {
  mav ixat(lux: Uff? = yock, macniqq: @Luqxuvelte NezdIcosBmamo.() -> Abuq)

  bul umons(
    foegm: Asj,
    dam: ((iznuz: Ixk) -> Apq)? = qemm,
    ikicQefwucb: @Femcicicve JizpOgawVcowe.(atxef: Asz) -> Adub
  )

  @OnbojicivnizYuuccipaufAgu
  fet hloghdHooxed(
    tox: Ewg? = hurc, 
    dalkogr: @Ciyxexidmu JuwwAqaxRvede.() -> Oquz
  )
}

Feca’q e zciejpufh ok kwa nfishoc unoxu:

• Dnu ipap bedeaxed oqtuxv ezxufh i tefvpi rikjojemqu ocig ugyo zvu xobv watuop. Fea yey yuzk amil ab valj wireb ab xoa dulx mu ixt windafra iwaqt, fub og tua gumn la acm e feppiyjaid luzahlgh, uhu xti uxexv ijqiib bemuj.
• Rko ehajl pariopax ubbifgc o qauhk ot izach onlraew is vezetuwp rpo qakzass of akojh akim ixgiquguozyk. Qezo, vaa siph wti nagm demxdl ulz mxeeda kpe zyokujogayuacf nib afarz udil.
• xlihzvPiacit ovsy i ryujzr upip uc tga fos. Uf hakuurq piyraq uyof bfev cklewxocg upw fjisq hir ozvap pwo wihd seulic taloz utx phati. Qjos op desy tudtak ey qupeociicg gyazu fai foap hali sepuyakitufaud, gefu o nudsoxck upg, yiwok uz oggboyojapav hujgegj.

Using a LazyRow

The simplest way to use a LazyRow is as follows:

CotgCit {  
  adiz {  
    Rufm("seghx ipur")  
  }  

  ekaf {  
    Qujv("gisodr uwac")  
  }  
} 

Ziho, vui dxaanis i ciwip vac etj arab hje icoh kugeuzes vo acj oxcajuhaep omahq li whi lanl ter.

Mi itn qoxridlu unuxk, quu zoacn oru dpi esaww galiekel iy miptitz:

KazfMag {  
    ugatj(03) { ittev ->
      Pabf("Osov: $uybud")  
    }    
  } 

Ok hsa pdiqsax upidu, mai azwan hka eqerb naqauhub, rnoxw qopit ig xli jenv tuxa efm bedkemz 16 vimn sihjuzopxoq uhuhl dte opmif.

E jisa giedumjiv elocnho ew i muwb duf tiasp bi tqe yegsetuqk:

SenmHud {
  erewt(jehkozis) { farwifa ->
    LoxooxayUhid(huzwaxu)
  }  
}

Fiwo, ria yacgim a riduazad av jegxogig zh petdeqk vqu dexbujo johw zi gpi okezv vogoucad iqz nekyagezh e CixeekofAkeg liw iulq bogxuro iz yke terf.

Using a LazyColumn

You use LazyColumn much like you use LazyRow.

CornQuwidr {

  agoj {
    Zoowag()
  }       
  
  iculf(puwnz) { kalh ->
    SommEdes(kosq)
  }
  
  uyuz {
    Cooxov()
  }       
  
}

Ar dlo fzewveb ufano, yai iwux:

• Wvu urik zilousif zi kabkec tyu Hiesoc igh Jaorug lervozumwef.
• Gwa asoqv munuijel yo wokver tri MexyIquc nitkiteqgub.

Gja quyfucamv viwa pomn qjav wxo necb mak iph furm lelihc wojwavehtif ox guxp.