I’ve got the following code (Android):

coroutineScope.launch {
    val songs = mutableListOf<Song>()
    mediaProvider.findSongs().collect { (song, progress) ->
        songs.add(song)
        listeners.forEach { listener -> listener.onProgress(progress, song) }
    }

    listeners.forEach { listener -> listener.onComplete() }
}

The scope is instantiated via

CoroutineScope(Dispatchers.Main)

Despite

listener.onProgress

being called on the main thread - and successful log messages when it is called, the UI updates I’m making in response don’t seem to have any effect. Are the

listener.onProgress(progress, song)

calls somehow being gathered up and then all executed at the end? Ooh I think I might be blocking the main thread somewhere

unless you're `suspend`ing somwhere, you are still blocking the Main thread -- I presume

findSongs()

is a Flow, but did you move it off of the main thread while it works?

Huh. You know, I did have a

.flowOn(<http://Dispatchers.IO|Dispatchers.IO>)

call, but I’ve accidentally removed it at some point. That will be it!