MainActivity.kt

class MainActivity : DaggerAppCompatActivity(), RepositoryRecyclerViewAdapter.OnItemClickListener {
    ...
    @Inject lateinit var mainViewModelFactory: MainViewModelFactory

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val viewModel = ViewModelProviders.of(this, mainViewModelFactory)
                .get(MainViewModel::class.java)
        ...
       }

    ...
}