Is there a way to inject an object inside an extension function or a global function using DI framework in Android Kotlin?
I use this function in many places. So I do not want to pass a parameter every time.
DI framework can be any of Koin, Hilt, Dagger2, or others.
Something like that:
fun Context.showSomething() {
val myObject = inject()
showToast(myObject.text)
}
Instead of thinking about using Inject you could pass it as a parameter:
fun Context.showSomething(myObject: String) {
showToast(myObject.text)
}
With Koin you can do like this,
fun Context.showSomething() {
val myObject = GlobalContext.get().get()
showToast(myObject.text)
}
but it's totally not recommended way of using it.
I use my app component to inject into extension methods. For example, to use MyInjectableClass in an extension method:
// Your app component
@Component
interface ApplicationComponent {
fun myInjectable(): MyInjectableClass
}
// Your app class
class MyApplication: Application() {
companion object {
var appComponent: ApplicationComponent? = null
}
override fun onCreate() {
appComponent = DaggerAppComponent.create()
}
}
// Ext.kt file
private val injectable: MyInjectableClass?
get() = MyApplication.appComponent?.myInjectable()
fun Foo.extension() {
injectable?.bar()
// huzzah!
}
Of course you still need to provide the @Provides or @Binds method for MyInjectableClass.
