Is there onResume & onPause equivalent method in a composable function?

strictly speaking you can use

LifecycleObserver

,

LifecycleOwnerAmbient

and

DisposableEffect

together to get exactly that, but there might be a better fit for what you're doing. What's the use case?

On resume i check for permission if it's given and update the button's layout

The above should work fine then. We might provide some canned version of it in the stock libraries later but its implementation would be exactly the above