[Android][Animation] Interpolated translateY value causes android view to jump.

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Environment

React Native Environment Info: System: OS: macOS 10.14 CPU: x64 Intel® Core™ i7-4770HQ CPU @ 2.20GHz Memory: 862.68 MB / 16.00 GB Shell: 3.2.57 - /bin/sh Binaries: Node: 10.9.0 - ~/.nvm/versions/node/v10.9.0/bin/node Yarn: 1.10.1 - ~/.nvm/versions/node/v10.9.0/bin/yarn npm: 6.2.0 - ~/.nvm/versions/node/v10.9.0/bin/npm Watchman: 4.9.0 - /usr/local/bin/watchman SDKs: iOS SDK: Platforms: iOS 11.2, macOS 10.13, tvOS 11.2, watchOS 4.2 IDEs: Android Studio: 3.1 AI-173.4819257 Xcode: 9.2/9C40b - /usr/bin/xcodebuild npmPackages: react: 16.6.0-alpha.8af6728 => 16.6.0-alpha.8af6728 react-native: ^0.57.3 => 0.57.3 npmGlobalPackages: react-native-cli: 2.0.1

Description

I’m trying to implement collapsible header using React Native Animated API. using event method i get AnimatedHeaderValue and interpolate it into translateY value. This value i apply to container of my listView (so listView moves vertically). IOS animation works perfectly, but Android animation jumping and lagging when i scroll. I tried to inscrease scroll value and Android animation became more smooth.

This is scrollView container that passes onScroll to scrollView (listView)

<ScCompanyNewsFeedList optimizeHeight getRef={scrollView => { console.log("SCROLL VIEW", scrollView) this._scrollView = scrollView; }} scrollEventThrottle = { 2 } onScroll={Animated.event( [{ nativeEvent: { contentOffset: { y: this.AnimatedHeaderValue }}}], )} companyId={this.props.companyId}/> }

this is base container that contains tabs and my scrollView. It’s moving when scroll.

<Animated.View style={[{flex: 1}, {transform: [{translateY: headerHeight}]}]}> ... </Animated.View>

Interpolation

const animationRange = this.AnimatedHeaderValue.interpolate({ inputRange: [0, scrollRange], outputRange: [0, 1], extrapolate: "clamp" }); const headerHeight2 = animationRange.interpolate({ inputRange: [0, 1], outputRange: [0, -200] });

[mmamoyco]

The issue still exists on rn 0.57

[mateusfontana]

@kelset Yes. Here is a example tested on RN 58.1:

import React, { Component } from "react";
import { Animated, View, StyleSheet } from "react-native";

export default class Example extends Component {
  state = {
    scrollY: new Animated.Value(0)
  };

  render() {
    const marginTopAnimated = this.state.scrollY.interpolate({
      inputRange: [0, 100],
      outputRange: [100, 0],
      extrapolate: "clamp"
    });

    return (
      <View style={{ flex: 1, backgroundColor: "skyblue" }}>
        <Animated.ScrollView
          style={[
            styles.scrollView,
            {
              transform: [{ translateY: marginTopAnimated }]
            }
          ]}
          scrollEventThrottle={16}
          onScroll={Animated.event(
            [
              {
                nativeEvent: { contentOffset: { y: this.state.scrollY } }
              }
            ],
            { useNativeDriver: true }
          )}
        >
          <View style={{ height: 1000 }} />
        </Animated.ScrollView>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  scrollView: {
    backgroundColor: "#FFF",
    borderTopRightRadius: 28,
    borderTopLeftRadius: 28
  }
});

Just create a new project with react-native init and paste it on App.js. Here is a gif of the result: