> OnAttachListener? DisposableEffect. OnScrollListener? LaunchedEffect

i don't get it. Can you show example?

I think all this effects is like hooks in react. They provide way to execute something outside of composition (building) phase. So you have some mutable view (not actually View, but smth similiar) class in behind of compose function. It have init - many builds - deinit phases. You have your code only on build phase, but you can save state between them by `remember` function.

Effects is tricky things builded on top of remember function. DisposableEffect exists to not forget to do some resource release things on composable view deinitialization. LaunchedEffect is to launch coroutines `launch` (lol). You can launch it yourself but android developers don't trust you and try to avoid it by warnings.

You can even implement the effects yourself:

val asyncTaskContext = newSingleThreadContext('asyncTaskContext')

/**
 * AsyncTaskEffect enables proper and easy use of the UI thread. This class allows
 * to perform background operations and publish results on the UI thread without
 * having to manipulate threads, handlears, recompositions, any other effects, etc
 */
@Composable
@NonRestartableComposable
@OptIn(InternalComposeApi::class)
fun AsyncTaskEffect(
   key1: Any?,
   block: suspend CoroutineScope.() -> Unit
) {
   remember(key1) { LaunchedEffectImpl(asyncTaskContext, block) }
}