<https://github.com/google/dagger/issues/2752> an...

# dagger

[miqbaldc]

https://github.com/google/dagger/issues/2752

anyone knows a workaround to provide a FragmentActivity for a qualifier of @ActivityContext using @Binds or it’s only possible to use the @Provides ?

[trevjones]

i’d expect a provides hiding the hard cast is the only way since it is a cast up and can’t be verified simply. though i’d guess you could validate it at compile time it would be expensive.

[miqbaldc]

Ah I see, doing the hard cast was our current implementation 😞

something like this:

// TheModule.kt
// `as?` or using the pre-conditions by calling: Preconditions.checkNotNull(...)
@InstallIn(ActivityComponent::class)
@Module
object TheModule {

    @Provides fun fragmentActivity(@ActivityContext context: Context) = context as? FragmentActivity

}

// the injected class: MyClass.kt
class MyClass @Inject constructor(
    val fragmentActivity: FragmentActivity?
)

nullable, in case it failed with ClassCastException