CODEWITHSUNDEEP
androidkotlindependency-injectiondagger-hilt
haliltprkk
haliltprkk

Reputation: 1508

Field Injection via Hilt outside of Fragment and Activity

I was wondering that is it possible to use field injection outside of fragment or activity? I know I can use constructor injection but, I am wondering is it possible with field injection, as well. I think it was possible with Dagger.

When I try to do something with the injected yclass field I am getting this error

lateinit property yClass has not been initialized

But it was initialized at the Module I have created.

According to documentation I need to use @AndroidEntryPoint annotation to use field injection, but in that case I am getting this error:

@AndroidEntryPoint base class must extend ComponentActivity, (support) Fragment, View, Service, or BroadcastReceiver.

Note: It is working without an error at the activity

Basically, I want to do something like this,

class XClass() {

@Inject
lateinit var yClass: YClass

}

Thanks in advance,

Upvotes: 20

Views: 14438

Answers (2)

Dewan Tawsif
Dewan Tawsif

Reputation: 64

For anyone that is looking for an alternative answer I've made an library to inject custom classes anywhere. Even in functions! The library is at https://github.com/dewantawsif/flexible-hilt. After some tweaking to the custom classes it's as simple as

fun printPetType(pet: Pet = getFromFlexibleHilt()) {
    println(pet.type)
}

Upvotes: 0

Mücahid Kambur
Mücahid Kambur

Reputation: 1678

To use field injection for custom classes, you need to use @EntryPoint annotation. For more information:

https://developer.android.com/training/dependency-injection/hilt-android#not-supported

or codelab:

https://developer.android.com/codelabs/android-hilt#10

Upvotes: 17

Related Questions