IssueTracker

For the KSerializer to Saver direction,

val <T : Any> KSerializer<T>.saver: Saver<T, SavedState> get() = Saver(
    save = { encodeToSavedState(this@saver, it) },
    restore = { decodeFromSavedState(this, it) },
)

is working well.

It would be great if this was provided somewhere in a library.

We're focusing our support on KSerializer.toSaver(). We won't be implementing Saver.toSerializer() because KSerializer works with any Encoder/Decoder and trying to use a Saver to encode any other format besides SavedState/Bundle would be an error.

We plan to introduce KSerializer.toSaver() in androidx.compose.runtime.saveable as an optional feature. We will include an dependency on KTX Serialization (if not used by clients, R8 will remove it) but will not depend on savedstate, as the implementation here does not rely on any savedstate-specific symbols.

Project: platform/frameworks/support
Branch: androidx-main
Author: Marcello Galhardo <mgalhardo@google.com>
Link:      https://android-review.googlesource.com/3497596

Expose SavedStateConfig properties as public

Expose `SavedStateConfig` properties as public 
 
- We have cases where `SavedStateConfig` properties need to be used in other modules, such as handling fallbacks with `serializersModule.serializer()` to support contextual and polymorphic serializers. 
- To follow KTX Serialization convention, we are keeping `SavedStateConfig` properties public, similar to how `JsonConfiguration` does. 
 
RelNote: "`SavedStateConfig` properties are now public, enabling other modules to use these configurations." 
Bug: 378897438 
Test: N/A 
Change-Id: Ie5f4997bc61932de390da3699339e01b2e91b514

We’ve decided not to provide a public helper function for converting from Saver to KSerializer, as we’re planning to implement a rememberSaveable function that accepts a KSerializer (see b/376028110). At this time, we haven’t identified any use case where manual conversion would be preferred over using the new rememberSaveable variant.

(Please note that we introduced an internal helper function in aosp/3498639, which will be used internally by the new rememberSaveable variant.)