Will the system handle memory and resources cleanu...

# compose

[Gil Goldzweig]

Will the system handle memory and resources cleanup?

And will individual components be lifecycle aware? for example: dialogs

[matvei]

Now about activity/fragment life-cycle, but we have lifecycle aware effects, so you can init / cleanup some resources then component enters / leaves the composition.

Something like

@Composable
fun UserRow(userId: Int) {
    val user = +state<User?> { null }
    +onActive {
        val dispose = Api.getUserAsync(userId) { user.value = it }
        onDispose { dispose() }
    }
    if (user.value == null) {
        LoadingIndicator()
    } else {
        Row {
            Image(src = user.value.profileImage)
            Text(text = user.value.name)
        }
    }
}

the final APIs is still TBD, but that's what we have right now

[matvei]

you can use +onDispose separately as well

fun LoggedText(text: string) {
    +onDispose { Log.i(TAG, "text leaves composition") }
    Text(text)
}

[matvei]

and also we have +onCommit, which will trigger every time the composition commits

[matvei]

See here what's available (with kotlindocs):
https://android.googlesource.com/platform/frameworks/support/+/androidx-master-dev/compose/runtime/src/main/java/androidx/compose/Effects.kt

[Gil Goldzweig]

Cool, that was what I aimed for with me question