$ cd example
$ npm install
$ react-native run-ios
$ react-native run-android

/* Support Expo */
import { setExpoStatusBarHeight } from 'react-navigation-collapsible';
import { Constants } from 'expo';
setExpoStatusBarHeight(Constants.statusBarHeight);

import { withCollapsible } from 'react-navigation-collapsible';
const AnimatedFlatList = Animated.createAnimatedComponent(FlatList);

class MyScreen extends Component{
  static navigationOptions = {
    title: 'My Screen'
  };

  render(){
    const { paddingHeight, animatedY, onScroll } = this.props.collapsible;

    return (
      <AnimatedFlatList 
        ...
        contentContainerStyle={{paddingTop: paddingHeight}}
        scrollIndicatorInsets={{top: paddingHeight}}
        _mustAddThis={animatedY}
        onScroll={onScroll} 

        // if you want to use 'onScroll' callback.
        // onScroll={Animated.event(
        //   [{nativeEvent: {contentOffset: {y: animatedY}}}],
        //   {useNativeDriver:true, listener:this.onScroll})} 
        />
    )
  }
}

export default withCollapsible(MyScreen, {iOSCollapsedColor: '#031'});

type CollapsibleParams = {
  iOSCollapsedColor: string, // iOS only
} | {
  collapsibleComponent: React.Component,
  collapsibleBackgroundStyle: {
    ...React.Style
  } & {
    disableFadeoutInnerComponent?: boolean,
    paddingBottom?: number,
  }
}

function withCollapsible (WrappedScreen, collapsibleParams: CollapsibleParams = {})
function withCollapsibleForTab (MaterialTapNavigator, collapsibleParams: CollapsibleParams = {})
function withCollapsibleForTabChild (WrappedScreen)

function setExpoStatusBarHeight (height) // expo only
function setSafeBounceHeight (height)

render () {
  const {
    paddingHeight,
    translateY, // 0 ~ collapsibleHeaderHeight
    translateOpacity, // 1.0 ~ 0.0
    translateProgress, // 0.0 ~ 1.0
    animatedY,
    onScroll, 
  } = this.props.collapsible;

  ...
}