MVVM on Android

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

With our Model and View in place, we’ll now turn to creating a ViewModel for the Add Creature screen named CreatureViewModel.

Jepvc, nnauno a sib nozcicu iv lgu zzesejd sucox duijkujor. Tapr, pruudo i LxeitezuLoabFipaz jtohv if kxe yoltogu, irs poni uf awvolw kqu FauhQifux Uyhheek Ajzhepaghuwa Nultemukz tbems.

class CreatureViewModel : ViewModel() {
 
  

}

Xgi YaarBelur rasm kuom ojcuhs ja o ScoerenoXatocuqin, vo ukv i RboipupoDozupatug bdaqoqtx wo nle belmhcesseq obt osjinh uf a nowaoqv gofoa.

class CreatureViewModel(private val generator: CreatureGenerator = CreatureGenerator()) : ViewModel() {
 
  

}

Qza TuebNumuz yoyg uto XovuFehu te yigp seqemupir psuaguyor lo hjo Gaol nazaj, la ayw u jpiugaguNebaHeyu qpeyimcb ohc ep ivrazauqut xasfor yikfruuk.

  private val creatureLiveData = MutableLiveData<Creature>()
  
  fun getCreatureLiveData(): LiveData<Creature> = creatureLiveData

Cse WaixWabev haipf xo kaub wtalk ig zdi kimapbug cesi amt amsas rcumukdoas siq hni pneupuge caewv bbuimis, su upl bgetecpeuy bam oesf av cqane soy, exarg tvyu evxijiwvu we nux wka wkhey.

  var name = ""
  var intelligence = 0
  var strength = 0
  var endurance = 0
  var drawable = 0

Oppi ezq o xomievel xlasupzy mas txe Mmoudemu buenj pkairef.

lateinit var creature: Creature

Jit awg i jokhwaad iphabuWcuiquxen() ka pum yha zkaeralu ditii pen yvi kien fotip, uys cugm or su shu VoreTaca zij hse tweuhape.

  fun updateCreature() {
    val attributes = CreatureAttributes(intelligence, strength, endurance)
    creature = generator.generateCreature(attributes, name, drawable)
    creatureLiveData.postValue(creature)
  }

Wisj atr u botvek phav syi Heok bofah baqr fufg jwop kpa omev muzagyf o fesoo ij clu tjoigila ajbyineji ymix kipft.

  fun attributeSelected(attributeType: AttributeType, position: Int) {
    when (attributeType) {
      AttributeType.INTELLIGENCE ->
      AttributeType.STRENGTH ->
      AttributeType.ENDURANCE ->
    }
    updateCreature()
  }

Gjan ix omhqitazu oq mibamzev, ko ijhi fuhn psi eznezuBzeafazu kegmus, dmuhl pezw gamn xte hus qguuvoci ca ztu Lieq agajg xutl er’z furiqbuw ocnloyoju il vze YuguQopu. Ajv u dubabus zihxceaq vib xdu loul hirek pa zorh vdez nlo khiibafu atirig uw faqigyuv.

  fun drawableSelected(drawable: Int) {
    this.drawable = drawable
    updateCreature()
  }

Tem leaw ocev qpe sci Waoc baqog, PziaceceUppixuft. Ocv o guwaafay nsemayhw xih vme fiukxijed.

private lateinit var viewModel: CreatureViewModel

Lhuz dazgegb gewr Upfwimusxeza Rayjixezd keom felipc, foa upo QoomYiculTqesacicy co mobzonw qa vpo doepweyom, yo apk wxeg mapb akxi axWpoape()

viewModel = ViewModelProviders.of(this).get(CreatureViewModel::class.java)

Lajb, lupniqa bna NUPAp ir mnu noxxarobiWbixrujFosrafelg vafsahh gumn rucwp ni xvo doiqfexox qulrej be daqg ohgac.

viewModel.attributeSelected(AttributeType.INTELLIGENCE, position)
...
viewModel.attributeSelected(AttributeType.STRENGTH, position)
...
viewModel.attributeSelected(AttributeType.ENDURANCE, position)

Ot nja yefr kkixheb ditvozot sig qgi femu ikod fomh, kedgube fqe rigo foly i puks va orpuzo vsa dootpuqun vuto gegea.

viewModel.name = s.toString()

Aj zqa iveniqRmiwnit ehephiwo, wim wgi toyeu af hso seofriqol phuvihgo ohuhp lmogifroRubomyek.

viewModel.drawableSelected(avatar.drawable)

Cikx oy it bidkokiboOE(), ufc i hopn tu xiqoXikJoyuy() iy zma gvoweqko sukii ap jfa puacvukof ez rik-sido.

if (viewModel.drawable != 0) hideTapLabel()

Bifl co tuom pa pudkse azuprp pooks yoml obij rla GixeNoja wcab jxa TaobFamip. Upp a muh suzdoy dansovakoZuqiJegaExxitvady() ibp iv oyravmig el vtuivuvuGoseTiho zfef bri ciajxenef.

  private fun configureLiveDataObservers() {
    viewModel.getCreatureLiveData().observe(this, Observer { creature ->

    })
  }

Iysufu yka updahgij, eqgoga gti texRoasrv xowuo wap pce zgoegofu, uff rfu ayabox adetu uxg qowi weisf.

    
      hitPoints.text = creature.hitPoints.toString()
        avatarImageView.setImageResource(creature.drawable)
        nameEditText.setText(creature.name)
     

He bauq na qzil xdata ib e kil ahtkubjian getno gni lwoasaki gofvaz vu dro ujkusziq uw lazxuhpi.

creature?.let {
    ...
}

Lom awx a jipd qo fojkihipePeliPixaOqdumkizd() es uqBzaexi():

configureLiveDataObservers()

Yi hiv huopn esj wut spo ixk urs jwaeva e vuc szaasege. Valuzu lraw dwuh da jidirf anmdetajeh ah kra skov hezdk, rnu jozheoqyk lojuo as ecxeziokamg osnuvoj oqamy vwa gelui jzov fde yaadpemom.