Error trying to inject GenerativeModel object into a viewModel

[txoksue]

Description of the bug:

I am facing an issue when trying to inject with Hilt a GenerativeModel object into a viewModel as below. I am using Jetpack Compose:

@AndroidEntryPoint
class ExampleActivity : ComponentActivity() {
....

    @Composable
    fun ExampleNavHost(
        navController: NavHostController,
        modifier: Modifier
    ) {
        NavHost(
            navController = navController,
            startDestination = route1
        ) {
            composable(route1) {
                val exampleViewModel = hiltViewModel<ExampleViewModel>()
                ExampleScreen(viewModel = exampleViewModel)
            }
            composable(route2) {

            }
            composable(route3) {

            }
        }
    }

}

@Module
@InstallIn(SingletonComponent::class)
class GeminiModule {

    @Provides
    @Singleton
    fun provideGemini(): GenerativeModel {
        return GenerativeModel(
            modelName = BuildConfig.gemini_1_5_flash,
            apiKey = BuildConfig.apiKey,
            generationConfig = generationConfig {
                temperature = 1f
                topK = 64
                topP = 0.95f
                maxOutputTokens = 8192
                responseMimeType = "application/json"
            },
            safetySettings = listOf(
                SafetySetting(HarmCategory.HARASSMENT, BlockThreshold.MEDIUM_AND_ABOVE),
                SafetySetting(HarmCategory.HATE_SPEECH, BlockThreshold.MEDIUM_AND_ABOVE),
                SafetySetting(HarmCategory.SEXUALLY_EXPLICIT, BlockThreshold.MEDIUM_AND_ABOVE),
                SafetySetting(HarmCategory.DANGEROUS_CONTENT, BlockThreshold.MEDIUM_AND_ABOVE),
            )
        )
    }
}

@HiltViewModel
class ExampleViewModel @Inject constructor(val generativeModel: GenerativeModel) : ViewModel() {
}

java.lang.RuntimeException: Cannot create an instance of class com.example.presentation.ExampleViewModel
at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.kt:201)
at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.kt:320)
at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.kt:302)
at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.kt:276)
at androidx.lifecycle.SavedStateViewModelFactory.create(SavedStateViewModelFactory.kt:128)
at dagger.hilt.android.internal.lifecycle.HiltViewModelFactory.create(HiltViewModelFactory.java:172)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.kt:184)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.kt:150)
at androidx.lifecycle.viewmodel.compose.ViewModelKt.get(ViewModel.kt:215)

Caused by: java.lang.NoSuchMethodException: com.example.presentation.ExampleViewModel. [] (Ask Gemini)
at java.lang.Class.getConstructor0(Class.java:2332)
at java.lang.Class.getDeclaredConstructor(Class.java:2170)
at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.kt:199)

Actual vs expected behavior:

No response

Any other information you'd like to share?

No response

[rlazo]

HI @txoksue from the exception in your code it isn't clear that this is caused by the SDK, specifically

Caused by: java.lang.NoSuchMethodException: com.foodai.presentation.ExampleViewModel. [] (Ask Gemini)

seems like the error is in ExampleViewModel and how it's created by hilt.

[txoksue]

Yes, you are right, the problem was hilt configuration dependencies in my project. I raised this bug because everything worked as expected when I removed object injection from the ViewModel constructor.

Thank you.