I m trying to lazy load items to be displayed in a `Dialog` kotlinlang #compose

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Title

m

Mark

02/01/2023, 9:32 AM

I’m trying to lazy-load items to be displayed in a

Dialog

. To achieve this, I have a state of

MutableList

which is initially empty and then populated via a

LaunchedEffect

. Even though the state is successfully updated, the Dialog does not show the items. Is this something to do with limitations in updating Dialog’s contents, or am I doing something fundamentally wrong?

I’ve found a way to make it work by doing this:

var items by remember {
    mutableStateOf<List<Item>>(emptyList())
}
LaunchedEffect(true) {
    items = calculateItems()
}
if (items.isNotEmpty()) {
    MyDialog(items, onDismissRequest)
}

although I’m not sure why it wasn’t also working when the

LaunchedEffect

was specified within the

MyDialog

composable.

m

Mini

02/01/2023, 10:46 AM

https://developer.android.com/jetpack/compose/state#state-in-composables

You could consider `produceState`for this, which is basically just a wrapper around what you’re doing, but might be easier to understand

val items = produceState(emptyList()){
    value = calculateItems()
}

m

Mark

02/11/2023, 4:53 AM

Thanks Mini, that’s better!

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