What is the difference between `rememberSavable` and `savedInstanceState`. Both are mentioned in <ht...

# compose

[robnik]

What is the difference between rememberSavable and savedInstanceState. Both are mentioned in https://developer.android.com/jetpack/compose/state. They look like they do the same thing.

[Dominaezzz]

The latter was deprecated for the former in the most release.

[Dominaezzz]

Similarly to how we previously removed state { 0 } composable and now promote usage like remember { mutableStateOf(0) } we are going to remove savedInstanceState { 0 } composable. You should use rememberSaveable { mutableStateOf(0) } instead and it will save and restore automatically if the type used inside the MutableState can be stored in the Bundle. If previously you were passing a custom saver object now you need to use a new overload of rememberSaveable which has stateSaver parameter. The usage will look like this: val holder = rememberSaveable(stateSaver = HolderSaver) { mutableStateOf(Holder(0)) }

[Dominaezzz]

https://developer.android.com/jetpack/androidx/releases/compose-ui#1.0.0-beta01