Is it possible to keep a ScrollView scrolled to the bottom?

Question

For React Native 0.41 and later, you can do this with the built-in scrollToEnd method:

<ScrollView
    ref={ref => {this.scrollView = ref}}
    onContentSizeChange={() => this.scrollView.scrollToEnd({animated: true})}>
</ScrollView>

For anyone writing function component that can use hook,

import React, { useRef } from 'react';
import { ScrollView } from 'react-native';

const ScreenComponent = (props) => {
  const scrollViewRef = useRef();
  return (
    <ScrollView
      ref={scrollViewRef}
      onContentSizeChange={() => scrollViewRef.current.scrollToEnd({ animated: true })}
    />
  );
};

Use onContentSizeChange to keep track of the bottom Y of the scroll view (height)

https://facebook.github.io/react-native/docs/scrollview.html#oncontentsizechange

var _scrollToBottomY

<ScrollView
    onContentSizeChange={(contentWidth, contentHeight)=>{
    _scrollToBottomY = contentHeight;
    }}>
</ScrollView>

then use the ref name of the scroll view like

this.refs.scrollView.scrollTo(_scrollToBottomY);

Here is the simplest solution I could muster:

 <ListView
ref={ref => (this.listView = ref)}
onLayout={event => {
    this.listViewHeight = event.nativeEvent.layout.height;
}}
onContentSizeChange={() => {
    this.listView.scrollTo({
        y: this.listView.getMetrics().contentLength - this.listViewHeight
    });
}}
/>;