I am using `avedInstanceState`in dev14 but getting this erro

Question

I am using `avedInstanceState`in dev14 but getting this error `cannot be saved using the current UiSavedInstanceStateRegistry The default implementation only supports types which can be stored inside the Bundle Please consider implementing a custom Saver for this class and pass it to savedInstanceState or rememberSavedInstanceState `

Zach Klippenstein (he/him) [MOD] · Answer

What type are you trying to save

amar_1995 · Answer

Custom object

Zach Klippenstein (he/him) [MOD] · Answer

That error message is pretty clear imo what part doesn t make sense

amar_1995 · Answer

Do I need to add `saver` in custom object part

Foso · Answer

dev14 or dev17

amar_1995 · Answer

dev14

Foso · Answer

try dev17

amar_1995 · Answer

okay

Zach Klippenstein (he/him) [MOD] · Answer

You pass the saver to `rememberSavedInstanceState`

amar_1995 · Answer

```val navigationSaver = Saver lt NavigationStack lt MainScreen gt NavigationStack lt MainScreen gt gt save = it restore = NavigationStack init = MainScreen Watchlist this navigation = rememberSavedInstanceState lt NavigationStack lt MainScreen gt gt saver = navigationSaver NavigationStack init = MainScreen Watchlist ``` Above code is giving me `java lang IllegalStateException Check failed ` error

amar_1995 · Answer

`Check failed ` `at androidx ui savedinstancestate ValueProvider$updateAndReturnValue$1 invoke RememberSavedInstanceState kt 106 ` `at androidx ui savedinstancestate UiSavedStateRegistryImpl performSave UiSavedStateRegistry kt 116 ` `at androidx ui core SavedStateDelegate dispatchSaveInstanceState SavedStateDelegate kt 106 ` `at androidx ui core AndroidComposeView dispatchSaveInstanceState AndroidComposeView kt 690 ``

Zach Klippenstein (he/him) [MOD] · Answer

Is `NavigationStack` `Serializable` or `Parcelable` The error message you posted initially says The default implementation only supports types which can be stored inside the Bundle

amar_1995 · Answer

It is niether It just a simple class

amar_1995 · Answer

amar_1995 · Answer

I am trying do the above same way

Zach Klippenstein (he/him) [MOD] · Answer

Right so you need to return something from the `save` lambda that can be stored in a `Bundle`

amar_1995 · Answer

Is there any example for this

Zach Klippenstein (he/him) [MOD] · Answer

The example you posted does it It returns restores `Holder value` which is an `Int` i e something that can be stored in a `Bundle`

Zach Klippenstein (he/him) [MOD] · Answer

The saver is basically your serialization deserialization logic but instead of serializing to a byte array you re serializing to any of the types supported by `Bundle`

amar_1995 · Answer

Got your point thanks