Listening to coroutine from view cant be done from the views init - kotlin

Question

I am trying to listen to my ViewModels MutableStateFlow from my FlutterSceneView. But I get the following error when trying to set the listener from the views init:
Suspend function 'listenToBackgroundColor' should be called only from a coroutine or another suspend function
class FlutterSceneView(context: Context, private val viewModel: FlutterSceneViewModelType): PlatformView {
private val context = context
private val sceneView = SceneView(context)
init {
listenToBackgroundColor() // Error here
}
private suspend fun listenToBackgroundColor() {
viewModel.colorFlow.collect {
val newColor = Color.parseColor(it)
sceneView.setBackgroundColor(newColor)
}
}
}
My ViewModel:
interface FlutterSceneViewModelType {
var colorFlow: MutableStateFlow<String>
}
class FlutterSceneViewModel(private val database: Database): FlutterSceneViewModelType, ViewModel() {
override var colorFlow = MutableStateFlow<String>("#FFFFFF")
init {
listenToBackgroundColorFlow()
}
private fun listenToBackgroundColorFlow() {
database.backgroundColorFlow.watch {
colorFlow.value = it.hex
}
}
}
the .watch call is a helper I have added so that this can be exposed to iOS using Kotlin multi-platform, it looks as follows but I can use collect instead if necessary:
fun <T> Flow<T>.asCommonFlow(): CommonFlow<T> = CommonFlow(this)
class CommonFlow<T>(private val origin: Flow<T>) : Flow<T> by origin {
fun watch(block: (T) -> Unit): Closeable {
val job = Job()
onEach {
block(it)
}.launchIn(CoroutineScope(Dispatchers.Main + job))
return object : Closeable {
override fun close() {
job.cancel()
}
}
}
}

Answer 1

I resolved this by using viewModel context:
private fun listenToBackgroundColor() {
viewModel.colorFlow.onEach {
val newColor = Color.parseColor(it)
sceneView.setBackgroundColor(newColor)
}.launchIn(viewModel.viewModelScope)
}
I had to import the following into my ViewModel:
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
from:
implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0")