Trying to understand the following example and do something similar.
In my application there is a module, in which I want to use Dagger.
To do this I need an Application class in which I initialize and store AppComponent
Judging from the documentation I need to create an interface with a component from my module:
interface PasscodeSetupComponentProvider {
fun providePasscodeSetupComponent(): PasscodeComponent
}
Then I will implement this interface for my Application class:
open class FenturyApplication : PasscodeSetupComponentProvider {
lateinit var appComponent: AppComponent
override fun onCreate() {
super.onCreate()
appComponent = DaggerAppComponent.builder()
.appModule(AppModule(applicationContext))
.build()
}
override fun providePasscodeSetupComponent(): PasscodeComponent {
return appComponent.passcodeComponent
}
}
But judging by the example from the documentation I don't understand what should be in my interface Appcomponent
namely passcodeComponent
.
In the example, it looks like this:
class MyApplication: Application(), LoginComponentProvider {
// Reference to the application graph that is used across the whole app
val appComponent = DaggerApplicationComponent.create()
override fun provideLoginComponent(): LoginComponent {
return appComponent.loginComponent().create()
}
}
I added the following code to my AppComponent:
@Component(modules = [AppModule::class])
@Singleton
interface AppComponent {
val applicationContext: Context
fun passcodeComponent(): PasscodeComponent
}
And if I understood correctly, then in the fragment that is in my module, I can write the following:
lateinit var passcodeComponent: PasscodeComponent
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val context = activity?.applicationContext ?: return
passcodeComponent = (context as PasscodeSetupComponentProvider).providePasscodeSetupComponent()
passcodeComponent.inject(this)
After that I hope I can use dagger in my module.
You're missing a crucial part of how AppComponent is written. You can read the complete code in this link.
Please note how Google is declaring the
LoginComponent
(as Subcomponent) and how do they declare it inside AppComponent in order do return a new instance of LoginComponent.AppComponent (copied from the link I posted)
And the code for LoginComponent