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artistAdapter = ArtistAdapter(this@ChartIndexFragment, R.layout.item_artist_type_1, artistRes) { holder, item, _ ->
    // If a ViewModel doesn't exist, I will create a ViewModel.
    if (null == holder.binding.avm)
        holder.binding.avm = RecyclerViewSearchArtistChartViewModel(item)
    // Otherwise, I just reset the data to the ViewModel.
    else
        holder.binding.avm?.setArtistItem(item)
}

pokk

artistAdapter = ArtistAdapter(this@fragment, R.layout.item_artist_type_1, artistRes) { holder, item, _ ->
    // !! The problem will happen here.
    // The ViewModel will be created again and again.
    holder.binding.avm = RecyclerViewSearchArtistChartViewModel(item)
}

pokk

class ActivityModule {
    @Provides
    @PerActivity
    fun provideNavigator(): Navigator = Navigator()

    @Provides
    @PerActivity
    fun provideMainPresenter(): MainContract.Presenter = MainPresenter()
}

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@Singleton
@Component(modules = arrayOf(AppModule::class))
interface AppComponent {
    object Initializer {
        fun init(app: App): AppComponent = DaggerAppComponent.builder()
                .appModule(AppModule(app))
                .netModule(NetModule(app))
                .build()
    }

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class App: Application() {
    companion object {
        lateinit private var context: Context

        @JvmStatic fun appComponent(): AppComponent = (context as App).appComponent
        // Provide the global application context.
        @JvmStatic fun getAppContext(): Context = context
    }

    // Before dagger 2.11

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{"lastUpload":"2017-11-27T08:31:15.832Z","extensionVersion":"v2.8.6"}

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@Module
class FragmentMainModule {
    @Provides
    @PerFragment
    fun provideMainPresenter(usecase: CreateFakeUseCase): MainContract.Presenter = MainPresenter(usecase)

    @Provides
    @PerFragment
    fun provideUsecase(threadExecutor: ThreadExecutor,
                       postExecutionThread: PostExecutionThread,

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@Module
abstract class BindingFragmentModule {
    @PerFragment
    @ContributesAndroidInjector(modules = arrayOf(FragmentMainModule::class))
    abstract fun contributeMainFragmentInjector(): MainFragment
}

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@Module
abstract class BindingActivityModule {
    /**
     * ContributesAndroidInjector is including fragment injector. Only putting FragmentBindModule in modules array,
     * the children fragment can obtain the parent's fragment injector.
     */
    @PerActivity
    @ContributesAndroidInjector(modules = arrayOf(BindingFragmentModule::class))
    abstract fun contributeMainActivityInjector(): MainActivity
}

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@Module
class AppModule {
    @Provides
    @Singleton
    fun provideApplication(app: App): Application = app

    @Provides
    @Singleton
    fun provideAppContext(app: App): Context = app.applicationContext
}