错误：找不到方法ViewModelProviders.of（Fragment，Factory）的合适方法

Question

Trying to provde ViewModel via ViewModelProviers.of() to my activity.

My activity extends AppCompatActivity but I still see this error:

error: no suitable method found for of(StartActivity,StartViewModelFactory) method ViewModelProviders.of(Fragment,Factory) is not applicable (argument mismatch; StartActivity cannot be converted to Fragment) method ViewModelProviders.of(FragmentActivity,Factory) is not applicable (argument mismatch; StartActivity cannot be converted to FragmentActivity)

Dependency Injection is provided with Dagger 2. Below is my Activity class StartActivity:

public class StartActivity extends AppCompatActivity {

    @Inject
    StartViewModelFactory startViewModelFactory;
    StartModelView startModelView;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        AndroidInjection.inject(this);
        super.onCreate(savedInstanceState);
        startModelView = ViewModelProviders.of(this, startViewModelFactory).
                get(StartViewModel.class);

}

If I understand correctly you should be able to send in an activity in ViewModelProviders.of() method if they extend AppCompatActivity or Fragment. But I get this error. Any help would be appreciated.

Answer 1

you should be using

   .get(StartModelView.class);

and not

 .get(StartViewModelFactory.class);

the factory provided to of() is used by android to generate an instance of your ViewModel subclass