Is there a way to access the Fragment args when us...

# dagger

[Thomas]

Is there a way to access the Fragment args when using Hilt? I tried something like this:

@InstallIn(FragmentComponent::class)
@Module
object MyFragmentModule {

    @Provides
    @FragmentScope
    internal fun providesViewModel(
        fragment: MyFragment,
        anotherDependency: Dependency
    ) = MyViewModel(
        fragment.requireArguments().getString("argument"),
        anotherDependency
    )
}

@AndroidEntryPoint
class MyFragment : Fragment() {
    // ...
}

However, this does not appear to work as it shows the following error when building:

error: [Dagger/MissingBinding] com.myapp.MyFragment cannot be provided without an @Inject constructor or an @Provides-annotated method. This type supports members injection but cannot be implicitly provided.

Am I doing something wrong? This worked fine without Hilt when using Dagger Android.

[Ahmed Ibrahim]

Have you tried replacing MyFragment with a mere Fragment?

[Ahmed Ibrahim]

Yep just confirmed, a mere Fragment should work.

[Thomas]

That works but it would be much better if I can just access MyFragment so I only need to retrieve the fragment args once (in MyFragment onCreate)

[Ahmed Ibrahim]

Then I'm afraid that you'll have to create a custom component for that and do your own @BindsInstance for your custom Fragment type.
https://dagger.dev/hilt/custom-components

[Thomas]

In that case it’s probably easier to move the args retrieval to the Dagger module. Thanks for the help.

[Ahmed Ibrahim]

or perhaps you can add a provisioning method from a Fragment to your MyFragment

[Ahmed Ibrahim]

so you can do

@Binds
fun bindsMyFragment(f: Fragment): MyFragment

[Ahmed Ibrahim]

But haven't tried that myself so not sure if it will work.

[Thomas]

Ok, I’ll look into it, thanks!

[Thomas]

This works as well and looks like the easiest way:

@Provides
@FragmentScope
internal fun providesViewModel(
    fragment: Fragment,
    anotherDependency: Dependency
) = MyViewModel(
    (fragment as MyFragment).myArgument,
    anotherDependency
)

[Ahmed Ibrahim]

Yeah that would absolutely work

[Javier]

you are doing that provides + @ViewModelInject?

[Thomas]

No, I cannot use @ViewModelInject as I need to pass Fragment args to the view model.