Hilt Multi-module Cannot create an instance of class ViewModel

Question

I'm trying out a new architecture with multi-module and DI though Hilt, I have the following modules:

When I start the app I'm getting java.lang.RuntimeException: Cannot create an instance of class HomeViewModel

App module

@AndroidEntryPoint
class MainActivity: AppCompatActivity()

FeatureHome

class HomeFragment: Fragment() {
    private val viewModel: HomeViewModel by viewModels()
    ...
}

@HiltViewModel
class HomeViewModel @Inject constructor(): ViewModel {
    ....
}

I'm not sure what to do to resolve this. Should my HomeFragment also have @AndroidEntryPoint ?

An activity or a fragment that is annotated with @AndroidEntryPoint can get the ViewModel instance as normal using ViewModelProvider or the by viewModels() KTX extensions: — bylazy
– bylazy, Commented Apr 30, 2023 at 6:45
Yes it works when the HomeFragment and HomeViewModel are in the same module as the MainActivity but when I move them to my featureHome module this doesn't work anymore — Biscuit
– Biscuit, Commented Apr 30, 2023 at 6:50
HomeFragment must also have @AndroidEntryPoint as the other comment suggests. And make sure hilt is in both modules. — jeprubio
– jeprubio, Commented Apr 30, 2023 at 8:07
But why ? When both Fragment and Activity are in the same package you don't need to have @AndroidEntryPoint on the Fragment — Biscuit
– Biscuit, Commented Apr 30, 2023 at 8:43
Does this answer your question? Cannot create an instance of class ViewModel — Viktor Skliarov
– Viktor Skliarov, Commented Apr 30, 2023 at 10:21

Mikhail Guliaev · Accepted Answer · 2023-04-30 10:10:45Z

0

Your Fragment has to be marked with the annotation @AndroidEntryPoint in order to tell Hilt to inject instances in your Fragment. (documentation)

answered Apr 30, 2023 at 10:10

Mikhail Guliaev

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