IssueTracker

Update Kotlin targets to 1.9 
 
Update Kotlin target of savedstate and projects that depend on it to 1.9. 
 
Bug: 374102924 
Test: existing tests still pass 
Change-Id: I442310ec57f7db381c16f95985a952deb9af57b2

Files:

• M lifecycle/lifecycle-viewmodel-compose/build.gradle
• M lifecycle/lifecycle-viewmodel-compose/samples/build.gradle
• M lifecycle/lifecycle-viewmodel-savedstate/build.gradle
• M lifecycle/lifecycle-viewmodel-testing/build.gradle
• M savedstate/savedstate-ktx/build.gradle
• M savedstate/savedstate/build.gradle
• M savedstate/savedstate/src/nativeMain/kotlin/androidx/savedstate/internal/SynchronizedObject.native.kt

Hash: 73305d3cf9d9bfff42b1836ac0127032b7721496
Date:  Tue Oct 29 17:27:51 2024

Add functions to encode serializable objects to and decode serializable objects from `SavedState`. 
 
We do this by implementing an `Encoder` and a `Decoder` that writes and reads a `SavedState` output format for Kotlin Serialization (https://github.com/Kotlin/kotlinx.serialization). The format represents a Kotlin Serialization "primitive" as their corresponding `SavedState` supported type, and represents a "composite" in a `SavedState` with its property names as keys. Nested composites are represented by nested `SavedState`s. 
 
Here are some other design choices we made: 
 
1. We don't record size for collections and rely on the size of the `SavedState` in decoding so that collections and non-collections are treated the same. 
2. To save space, we don't encode default values by default (it can be tweaked with `@EncodeDefault` with plugin-generated serializers). 
3. To support nullable parameters with default arguments (e.g. `val a: String? = "foo"`) and for `SavedState` size to be correct for collections, we encode `null`s. 
4. To keep things simple we don't support specifying custom `SerializersModule`s for now. 
 
Please note that when using Kotlin Serialization and these functions as a `Parcelable` alternative on Android there's a performance overhead because of the extra serialization needed. 
 
Also note that on Android we don't have built-in support for Android or Java specific types supported by `Bundle` or `Parcel` yet (e.g. `Exception`, `java.io.Serializable`, or `IBinder`).  We may consider adding these types in the future. 
 
Relnote: Add encodeToSavedState() and decodeFromSavedState() functions 
Test: SavedStateCodecTest.kt 
Bug: 374102924 
Change-Id: I6f59faffaa3777bf56132a67f41b867d7a9663e5

Files:

• M development/build_log_simplifier/messages.ignore
• M docs-tip-of-tree/build.gradle
• A savedstate/savedstate-samples/build.gradle
• A savedstate/savedstate-samples/src/main/java/androidx/savedstate/SavedStateCodecSamples.kt
• M savedstate/savedstate/api/current.txt
• M savedstate/savedstate/api/restricted_current.txt
• M savedstate/savedstate/bcv/native/current.txt
• M savedstate/savedstate/build.gradle
• A savedstate/savedstate/src/androidUnitTest/kotlin/androidx/savedstate/SavedStateCodecAndroidTest.android.kt
• A savedstate/savedstate/src/commonMain/kotlin/androidx/savedstate/serialization/SavedStateDecoder.kt
• A savedstate/savedstate/src/commonMain/kotlin/androidx/savedstate/serialization/SavedStateEncoder.kt
• A savedstate/savedstate/src/commonTest/kotlin/androidx/savedstate/SavedStateCodecTest.kt
• A savedstate/savedstate/src/commonTest/kotlin/androidx/savedstate/SavedStateCodecTestUtils.kt
• M settings.gradle

Hash: 57162ea74b646ef7ae43397251fd4cd32e2d80c3
Date:  Thu Oct 17 19:10:05 2024