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Add LiveData and ViewModels and implement detail screen with it
Migrate edit super hero screen Migrate main screen to view model WIP
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7 changes: 7 additions & 0 deletions
7
app/src/androidTest/java/com/karumi/jetpack/superheroes/data/singleValueLiveData.kt
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|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| package com.karumi.jetpack.superheroes.data | ||
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| import androidx.lifecycle.LiveData | ||
| import androidx.lifecycle.MutableLiveData | ||
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| fun <T> singleValueLiveData(value: T): LiveData<T> = | ||
| MutableLiveData<T>().apply { postValue(value) } |
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37 changes: 37 additions & 0 deletions
37
app/src/main/java/com/karumi/jetpack/superheroes/common/ViewModelFactory.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,37 @@ | ||
| package com.karumi.jetpack.superheroes.common | ||
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| import android.app.Application | ||
| import androidx.lifecycle.ViewModel | ||
| import androidx.lifecycle.ViewModelProvider | ||
| import androidx.lifecycle.ViewModelProviders | ||
| import com.karumi.jetpack.superheroes.ui.view.BaseActivity | ||
| import org.kodein.di.DKodein | ||
| import org.kodein.di.Kodein | ||
| import org.kodein.di.KodeinAware | ||
| import org.kodein.di.direct | ||
| import org.kodein.di.erased.bind | ||
| import org.kodein.di.erased.instance | ||
| import org.kodein.di.erased.instanceOrNull | ||
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| class ViewModelFactory( | ||
| private val injector: DKodein, | ||
| private val application: Application | ||
| ) : ViewModelProvider.Factory { | ||
| @Suppress("UNCHECKED_CAST") | ||
| override fun <T : ViewModel> create(modelClass: Class<T>): T { | ||
| return injector.instanceOrNull<ViewModel>(tag = modelClass.simpleName) as T? | ||
| ?: modelClass.getConstructor(Application::class.java).newInstance(application) | ||
| } | ||
| } | ||
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| inline fun <reified VM : ViewModel, T> T.viewModel(): Lazy<VM> | ||
| where T : KodeinAware, | ||
| T : BaseActivity<*> { | ||
| return lazy { ViewModelProviders.of(this, direct.instance()).get(VM::class.java) } | ||
| } | ||
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| inline fun <reified T : ViewModel> Kodein.Builder.bindViewModel( | ||
| overrides: Boolean? = null | ||
| ): Kodein.Builder.TypeBinder<T> { | ||
| return bind<T>(T::class.java.simpleName, overrides) | ||
| } |
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34 changes: 27 additions & 7 deletions
34
app/src/main/java/com/karumi/jetpack/superheroes/data/repository/SuperHeroRepository.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,24 +1,44 @@ | ||
| package com.karumi.jetpack.superheroes.data.repository | ||
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| import androidx.lifecycle.LiveData | ||
| import androidx.lifecycle.MediatorLiveData | ||
| import com.karumi.jetpack.superheroes.domain.model.SuperHero | ||
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| class SuperHeroRepository( | ||
| private val local: LocalSuperHeroDataSource, | ||
| private val remote: RemoteSuperHeroDataSource | ||
| ) { | ||
| fun getAllSuperHeroes(): List<SuperHero> = | ||
| local.getAllSuperHeroes().ifEmpty { | ||
| remote.getAllSuperHeroes() | ||
| .also { local.saveAll(it) } | ||
| fun getAllSuperHeroes(): LiveData<List<SuperHero>> = MediatorLiveData<List<SuperHero>>().apply { | ||
| val localSource = local.getAllSuperHeroes() | ||
| val remoteSource = remote.getAllSuperHeroes() | ||
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| addSource(remoteSource) { superHeroes -> | ||
| removeSource(remoteSource) | ||
| addSource(localSource) { postValue(it) } | ||
| local.saveAll(superHeroes) | ||
| } | ||
| } | ||
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| fun get(id: String): SuperHero? = | ||
| local.get(id) | ||
| ?: remote.get(id)?.also { local.save(it) } | ||
| fun get(id: String): LiveData<SuperHero?> = MediatorLiveData<SuperHero?>().apply { | ||
| addSource(local.get(id)) { | ||
| if (it == null) { | ||
| syncSuperHeroFromRemote(id) | ||
| } else { | ||
| postValue(it) | ||
| } | ||
| } | ||
| } | ||
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| fun save(superHero: SuperHero): SuperHero { | ||
| local.save(superHero) | ||
| remote.save(superHero) | ||
| return superHero | ||
| } | ||
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| private fun MediatorLiveData<SuperHero?>.syncSuperHeroFromRemote(id: String) { | ||
| addSource(remote.get(id)) { superHero -> | ||
| superHero ?: return@addSource | ||
| local.save(superHero) | ||
| } | ||
| } | ||
| } |
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3 changes: 2 additions & 1 deletion
3
app/src/main/java/com/karumi/jetpack/superheroes/domain/usecase/GetSuperHeroById.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,8 +1,9 @@ | ||
| package com.karumi.jetpack.superheroes.domain.usecase | ||
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| import androidx.lifecycle.LiveData | ||
| import com.karumi.jetpack.superheroes.data.repository.SuperHeroRepository | ||
| import com.karumi.jetpack.superheroes.domain.model.SuperHero | ||
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| class GetSuperHeroById(private val superHeroesRepository: SuperHeroRepository) { | ||
| operator fun invoke(id: String): SuperHero? = superHeroesRepository.get(id) | ||
| operator fun invoke(id: String): LiveData<SuperHero?> = superHeroesRepository.get(id) | ||
| } |
3 changes: 2 additions & 1 deletion
3
app/src/main/java/com/karumi/jetpack/superheroes/domain/usecase/GetSuperHeroes.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,8 +1,9 @@ | ||
| package com.karumi.jetpack.superheroes.domain.usecase | ||
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| import androidx.lifecycle.LiveData | ||
| import com.karumi.jetpack.superheroes.data.repository.SuperHeroRepository | ||
| import com.karumi.jetpack.superheroes.domain.model.SuperHero | ||
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| class GetSuperHeroes(private val superHeroesRepository: SuperHeroRepository) { | ||
| operator fun invoke(): List<SuperHero> = superHeroesRepository.getAllSuperHeroes() | ||
| operator fun invoke(): LiveData<List<SuperHero>> = superHeroesRepository.getAllSuperHeroes() | ||
| } |
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