ch8n

FWIW: I'm not the author of the content presented here (which is an outline from Edmond Lau's book). I've just copy-pasted it from somewhere over the Internet, but I cannot remember what exactly the original source is. I was also not able to find the author's name, so I cannot give him/her the proper credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

ch8n

@Module
@InstallIn(ApplicationComponent::class)
object NetworkResolver {
    @Provides
    @Singleton
    fun provideApiManager(retrofit: Retrofit) = ApiManager(retrofit)
    ....
}

ch8n

class MovieDetailActivity : AppCompatActivity() {
  @Inject
  internal laterinit var viewmodel: MovieViewModel

  override fun onCreate(savedInstanceState: Bundle?) {
      ...
      // viewmodel = Injector.detailViewModel(this) remove this line
      ...// viewModle is ready to be used...
  }

ch8n

@Singleton
@Component(
    modules = arrayOf(
        AndroidSupportInjectionModule::class,
        //..add here
        NetworkResolver::class,
        AppResolver::class,
        ViewModelResolver::class
    )

ch8n

@Module
object NetworkResolver {
    @Provides
    @Singleton
    fun provideApiManager(retrofit: Retrofit) = ApiManager(retrofit)
    ....
}

ch8n

// your core injectores need to have public all public fields

------- Domain Injection -------
// in searchmovie Domain module build.gradle
dependencies {
    implementation project(":core")
}

class SearchMovieApiManager(private val retrofit : Retrofit) {

ch8n

// you can remove `detailViewModel()` from injector and add it into a scoped e
// DI packag inside of your feature.
object MovieDetailInjector {
    fun detailViewModel(activity: AppCompatActivity) : MovieDetailViewModel {
      return ViewModelResolver.provideDetailViewModel(
                Injector.detailViewModelFactory, activity
            )
    }
}

ch8n

class MovieDetailActivity : AppCompatActivity() {
  private laterinit var viewmodel: MovieViewModel
  override fun onCreate(savedInstanceState: Bundle?) {
      ...
      viewmodel = Injector.detailViewModel(this)
      ...// viewModle is ready to be used...
  }
}

ch8n

object Injector {

    // step 7, okhttp and baseURL is standalone
    private val okHttp = NetworkResolver.provideOkHttpClient()
    private val baseURL = NetworkResolver.provideBaseURL()    
    
    // step 6, retrofit needs okhttp object and baseURL
    private val retrofit = NetworkResolver.provideRetrofitClient(
          baseURl,

ch8n

object ViewModelResolver {
    // step 1, we need a viewmodel which is creted by ViewmodelProviders 
    fun provideDetailViewModel():MovieDetailViewModel = ViewModelProviders
          .of(??, ??)
          .get(MovieDetailViewModel::class.java)

    // step 2, add dependencies of ViewmodelProviders, 
    // we have used added fragment Activty, so that we can support
    // multiple activities not just MovieDetail activity