viewmodel-dagger 
A tiny set of classes that helps you to use Android ViewModel with Dagger 2.
@ViewModelKey to sinalize Dagger 2 which type of ViewModel is returned by provider method in order to compose a map.
Example:
@Module
interface ViewModelModule {
@Binds
@IntoMap
@ViewModelKey(FooViewModel::class)
fun bindFooViewModel(viewModel: FooViewModel): ViewModel
}ViewModelFactoryModule represents a Dagger 2's module that provides an instance of ViewModelProvider.Factory. Just include it in some module:
@Module(includes = [ViewModelFactoryModule::class])
interface ViewModelModule {
// ...
}ViewModelFactory is the implementation of ViewModelProvider.Factory, which is used to create instances of ViewModel. Just inject it in your Activity, Fragment or in any place that you can inject Dagger 2 dependencies.
Example:
class FooActivity : DaggerAppCompatActivity() {
@Inject
lateinit var factory: ViewModelProvider.Factory
private lateinit var viewModel: FooViewModel
override fun onCreate(savedInstanceState: Bundle?) {
// ...
viewModel = ViewModelProviders.of(this, factory).get(FooViewModel::class.java)
}
}