Hi all! I'm trying to wrap my head around how to b...

# koin

[dead.fish]

Hi all! I'm trying to wrap my head around how to bind and use things that are bound into the activityRetainedScope(). This is my setup:

// MyActivity.kt
class MyActivity : AppCompatActivity(), AndroidScopeComponent {
    override val scope: Scope by activityRetainedScope()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            // I also tried CompositionLocalProvider(LocalKoinScope provides scope) { ... }
            KoinAndroidContext {
                AppNavHost()
            }
        }
    }
}

// AppNavHost.kt
fun AppNavHost(
    appBarActionsProvider: AppBarActionProvider = koinInject<AppBarActionProvider>(),
    ...
) { ... }

// MyModule.kt
fun myModule(): KoinModule =
    module {
        scope<ComponentActivity> {
            scopedOf(::AppBarActionHandler) binds arrayOf(AppBarActionProvider::class, AppBarActionObserver::class)
        }
        ...
    }

However, my injection of AppBarActionProvider is not found. I'm unsure what the Scope generic argument of scope() must be, the base class or something else?

[dead.fish]

Ok, got it working with providing LocalKoinScope with scope and using scoped<MyActivity> { ... }, now however I am not able to inject AppBarActionObserver in another injectee injected itself via koinViewModel. I guess the scope koinViewModel creates only knows of the root scope, but not my custom activityRetainedScope...

[dead.fish]

I created a small reproducer: https://github.com/realdadfish/koin-activityretained-viewmodel/tree/master

[dead.fish]

Ok, apparently one has to define those things that should benefit from things existing inside a specific scope in that scope as well, i.e. I had to move my viewModelOf(::MyViewModel) declaration inside my scope<MyActivity> { } block so that things provided inside that scope become accessible. Only downside I see here is that I always have to reference specific types here, i.e. MyActivity, to scope things, as activityRetainedScope does not allow me to specify another, more generic scope specifier, so things that should be scoped underneath Activities and that should also be shared between different activities do not work.

[arnaud.giuliani]

4.1 is bringing scope archetypes, allowing generic reuse of scopes - https://github.com/InsertKoinIO/koin/pull/2169