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Implement native Animated value listeners on Android

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Summary:
Adds support for `Animated.Value#addListener` for native driven nodes on Android. This is based on work by skevy in the exponent RN fork. Also adds a UIExplorer example.

** Test plan **
Run unit tests

Tested that by adding a listener to a native driven animated node and checked that the listener callback is called properly.

Also tested that it doesn't crash on iOS that doesn't support this yet.
Closes https://github.com/facebook/react-native/pull/8844

Differential Revision: D3670906

fbshipit-source-id: 15700ed7b93db140d907ce80af4dae6be3102135
This commit is contained in:
Janic Duplessis
2016-08-04 13:11:37 -07:00
committed by Facebook Github Bot 7
parent 30677e7193
commit 158d435f36
9 changed files with 266 additions and 15 deletions
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15
ReactAndroid/src/main/java/com/facebook/react/animated/ValueAnimatedNode.java
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@@ -11,13 +11,15 @@ package com.facebook.react.animated;
import com.facebook.react.bridge.ReadableMap;
import javax.annotation.Nullable;
/**
* Basic type of animated node that maps directly from {@code Animated.Value(x)} of Animated.js
* library.
*/
/*package*/ class ValueAnimatedNode extends AnimatedNode {
/*package*/ double mValue = Double.NaN;
private @Nullable AnimatedNodeValueListener mValueListener;
public ValueAnimatedNode() {
// empty constructor that can be used by subclasses
@@ -26,4 +28,15 @@ import com.facebook.react.bridge.ReadableMap;
public ValueAnimatedNode(ReadableMap config) {
mValue = config.getDouble("value");
}
public void onValueUpdate() {
if (mValueListener == null) {
return;
}
mValueListener.onValueUpdate(mValue);
}
public void setValueListener(@Nullable AnimatedNodeValueListener listener) {
mValueListener = listener;
}
}