ReactAndroid/com.facebook.react.uimanager/StateWrapper

StateWrapper

interface StateWrapper

This is a wrapper that can be used for passing State objects from Fabric C++ core to platform-specific components in Java. State allows you to break out of uni-directional dataflow by calling updateState, which communicates state back to the C++ layer.

Inheritors

Properties

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abstract val stateData: ReadableNativeMap?

Get a ReadableNativeMap object from the C++ layer, which is a K/V map of string keys to values.

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abstract val stateDataMapBuffer: ReadableMapBuffer?

Get a ReadableMapBuffer object from the C++ layer, which is a K/V map of short keys to values.

Functions

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abstract fun destroyState()

Mark state as unused and clean up in Java and in native. This should be called as early as possible when you know a StateWrapper will no longer be used. If there's ANY chance of it being used legitimately, don't destroy it! It is expected that all StateWrappers are destroyed immediately upon stopSurface.

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abstract fun updateState(map: WritableMap)

Pass a map of values back to the C++ layer. The operation is performed synchronously and cannot fail.