Hi ! I need a way to launch a simple check at each...

# compose

[loloof64]

Hi ! I need a way to launch a simple check at each recomposition of my @Composable.
So I'm using SideEffect , but it is not run at each screen update : so is there a better way ?

@Composable
fun MyComposable() {
   SideEffect { checkDraw()}
   MySubComposable()
}

[Adam Powell]

What are you trying to do and why?

[loloof64]

It's a kind of complex operation :
• I have the main logic in the ViewModel attached to the page of this composable -> it will cause the composable to recompose.
• I need to launch a notification if checkDraw() succeed in the Composable, each time it is recomposed : checkDraw will launch the notification which could not be launched from the logic in the ViewModel, if necessary.
Hence the SideEffect

[loloof64]

It appears in fact that SideEffect is always run, but it is a problem in my MutableStateFlow. First, it returns the correct state, then an incorrect state is following.

What I thought was a problem with SideEffect is in fact a problem with my StateFlow.

[Colton Idle]

Having a side-effect run every time there is a recomposition sounds really inefficient. Can you model this by just reacting to some state change?

[loloof64]

Yes, indeed, some days ago (I was not at home), I managed to implement my feature without needing SideEffect . I mean, I had to think again about the state I'm creating in my @Composable.

[Colton Idle]

nice. yeah the new arch docs (updated a few days ago) really help push you in that right mindset about state. def recomend reading it if you haven't already

[loloof64]

Yes thank you. I've read the documentation and created Repository, UseCase and ViewModel in order to handle the complexity of my application 😃