# SavedStateSerializer

Artifact: [androidx.savedstate:savedstate](https://developer.android.com/jetpack/androidx/releases/savedstate) [View Source](https://cs.android.com/search?q=file:androidx/savedstate/serialization/serializers/SavedStateSerializer.kt+class:androidx.savedstate.serialization.serializers.SavedStateSerializer) Added in [1.3.0](https://developer.android.com/jetpack/androidx/releases/savedstate#1.3.0)

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```
public static class SavedStateSerializer implements KSerializer<@NonNull SavedState>
```

<br />

*** ** * ** ***

A serializer for `https://developer.android.com/reference/androidx/savedstate/SavedState`.

This serializer operates in two modes:

1. **Optimized (Direct):** When used with `https://developer.android.com/reference/androidx/savedstate/serialization/SavedStateEncoder`/`https://developer.android.com/reference/androidx/savedstate/serialization/SavedStateDecoder`, it writes directly to the underlying Bundle, bypassing intermediate object allocation.

2. **Fallback (Wrapped):** When used with generic encoders (e.g. JSON), it converts the loosely-typed SavedState into strictly-typed wrapper classes to preserve type fidelity.

## Summary

| ### Public fields |
|---|---|
| `static @https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/androidx/savedstate/serialization/serializers/SavedStateSerializer` | `https://developer.android.com/reference/androidx/savedstate/serialization/serializers/SavedStateSerializer#INSTANCE()` |

| ### Public methods |
|---|---|
| `@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/androidx/savedstate/SavedState` | `https://developer.android.com/reference/androidx/savedstate/serialization/serializers/SavedStateSerializer#deserialize(kotlinx.serialization.encoding.Decoder)(@https://developer.android.com/reference/androidx/annotation/NonNull https://kotlinlang.org/api/kotlinx.serialization/kotlinx-serialization-core/kotlinx.serialization.encoding/-decoder/index.html decoder)` |
| `@https://developer.android.com/reference/androidx/annotation/NonNull https://kotlinlang.org/api/kotlinx.serialization/kotlinx-serialization-core/kotlinx.serialization.descriptors/-serial-descriptor/index.html` | `https://developer.android.com/reference/androidx/savedstate/serialization/serializers/SavedStateSerializer#getDescriptor()()` |
| `void` | `https://developer.android.com/reference/androidx/savedstate/serialization/serializers/SavedStateSerializer#serialize(kotlinx.serialization.encoding.Encoder,androidx.savedstate.SavedState)(@https://developer.android.com/reference/androidx/annotation/NonNull https://kotlinlang.org/api/kotlinx.serialization/kotlinx-serialization-core/kotlinx.serialization.encoding/-encoder/index.html encoder, @https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/androidx/savedstate/SavedState value)` |

## Public fields

### INSTANCE

Added in [1.3.0](https://developer.android.com/jetpack/androidx/releases/savedstate#1.3.0)

```
public static @NonNull SavedStateSerializer INSTANCE
```

## Public methods

### deserialize

Added in [1.3.0](https://developer.android.com/jetpack/androidx/releases/savedstate#1.3.0)

```
public @NonNull SavedState deserialize(@NonNull Decoder decoder)
```

### getDescriptor

Added in [1.3.0](https://developer.android.com/jetpack/androidx/releases/savedstate#1.3.0)

```
public @NonNull SerialDescriptor getDescriptor()
```

### serialize

```
public void serialize(@NonNull Encoder encoder, @NonNull SavedState value)
```