Cannot create an instance of custom ViewModel

Question

I am using dagger2 library. whenever I am trying to run my project is says not able to create instance of view model class.

main activity where I am trying to create

Answer 1

I'm a proficient Android developer and I have used ViewModel 100s of times with no issue. Today I came across this issue. Spent hours and scrolled through various SO posts. Didn't get solved.

Then I saw that the package name in which I have the ViewModel contains new. Like this:

com.myapp.myfeature.new.feature

I changed new to neww for testing like this: com.myapp.myfeature.neww.feature

and it worked! I hope someone find it useful.

Answer 2

Extend AndroidViewModel from your ViewModel class.

public class YourViewModel extends AndroidViewModel {

    public YourViewModel(Application application) {
        super(application);

        //Todo: ...
    }
}

Answer 3

Need to add below code in all activity if you use multiple activity

AndroidInjection.inject(this);

Answer 4

The solution for me was injecting the activity because I was using Dagger2

        AndroidInjection.inject(this);

Answer 5

Instead of:

mViewModel = ViewModelProviders.of(this).get(MoviesDataViewModel.class);

Perform:

mViewModel = ViewModelProviders.of(this, viewModelFactory).get(MoviesDataViewModel.class);

Answer 6

Replace:

private MoviesDataViewModel mViewModel;

with:

MoviesDataViewModel mViewModel;