NativeAnimatedModule.java 文件源码

@ReactMethod
public void startListeningToAnimatedNodeValue(final int tag) {
  final AnimatedNodeValueListener listener = new AnimatedNodeValueListener() {
    public void onValueUpdate(double value) {
      WritableMap onAnimatedValueData = Arguments.createMap();
      onAnimatedValueData.putInt("tag", tag);
      onAnimatedValueData.putDouble("value", value);
      getReactApplicationContext().getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
          .emit("onAnimatedValueUpdate", onAnimatedValueData);
    }
  };

  mOperations.add(new UIThreadOperation() {
    @Override
    public void execute(NativeAnimatedNodesManager animatedNodesManager) {
      animatedNodesManager.startListeningToAnimatedNodeValue(tag, listener);
    }
  });
}