IssueTracker

Hi. We ran into something like this. I'd really like some support

comment#2 curious what your use case is?

We decided to use the solution from the comment (via @Contextual) 👀

I would like to note this point in the documentation, if it is not noted.

Curious about what is the recommendation for:

@Serializable
data class MyDestination(val id: UUID) {

    companion object {
        val typeMap = mapOf(
            typeOf<UUID>() to NavType.SerializableType(UUID::class.java),
        )

        fun from(savedStateHandle: SavedStateHandle) = savedStateHandle.toRoute<MyDestination>(typeMap)
    }
}

The following compilation error is present for UUID:

Serializer has not been found for type 'UUID'. To use context serializer as fallback, explicitly annotate type or property with @Contextual

Furthermore, if I set a custom Serializer for the Class of MyDestination by @Serializable(MySerializer::class), then I also get the following error:

Custom serializers declared directly on a class field via @Serializable(with = ...) is currently not supported by safe args for both custom types and third-party types. Please use @Serializable or @Serializable(with = ...) on the class or object declaration.

Version 2.8.0-beta05.

My usecase is following:

    @Serializable
    data class DialogActivityDayHistory(
        val activityId: Long,

        @Serializable(LocalDateSerializer::class)
        val date: LocalDate
    )

Even in the latest version 2.8.0, comment #6 is still an issue

Expanding on whole thread or #7 for simple example.

What bothers me, is that when you define a custom @Serializable class and you try to pass it between destination routes, it will fail, because there is no custom NavType serializer defined. If custom data type is serializable, I would expect it to get serialized and de-serialized between destinations.

re:comment#9 - correct, we currently don't have built-in serializable support for custom types in 2.8. You will need to provide a custom NavType

We will explore the possibility of built-in serializable types in 2.9.

Project: platform/frameworks/support
Branch: androidx-main
Author: Clara Fok <clarafok@google.com>
Link:      https://android-review.googlesource.com/3313537

Add nav sample for serializable third party types

Add nav sample for serializable third party types

Sample to show workaround for b/341319151

Test: manual testing
Bug: 341319151
Bug: 348468840
Change-Id: I8c5553029b827440e55c0ecd0ceeb4ffc9957473

re:comment#6 - sample workaround can be found here