Hi, I was trying out compose and was wondering about its lifecycle and how to deal with it and its gotchas. The only place I found for documentation was this right here: https://foso.github.io/Jetpack-Compose-Playground/general/compose_lifecycle/ I was wondering if there was more. Or maybe its too early for this?

What would you like to know?

I hope its fine to ask dumb questions:

onDispose { } will be called when the compose function isn’t part of the composition anymore.

When is a compose function no longer part of the composition? Is everytime that it content changes? Like in the example in the documentation I cited:

@Composable
fun LifecycleDemo() {
        val count = state { 0 }

        Column {
            Button(onClick = {
                count.value++
            }) {
                Text("Click me")
            }

            if (count.value < 3) {
                onActive { Log.d("Compose", "onactive with value: " + count.value) }
                onDispose { Log.d("Compose", "onDispose because value=" + count.value) }
                Text("You have clicked the button: " + count.value.toString())
            }
        }
}

If I understood it correctly,

onDispose()

is attached to

Column()

and so when

count

gets to

3

it needs to "Recompose" (not really sure if thats the correct term) because

Text()

is no longer part of it and so

onDispose()

will be called? Did I understood it correctly? If that is the case (in a different and unrelated question) the

Column

before the

count == 3

and the

Column

after the

count == 3

are of different instance? Did I understood it correctly?

The way to think about it is that

onActive

and

onDispose

are themselves entities in the composition. If the surrounding condition is true, they enter the composition. If the surrounding condition becomes false, they leave the composition.

Ahhh I see, they are more like seperate entities. I was thinking of them the wrong way. Thank you very much. ❤️