style9.js

import React from "react";
import { SectionList, StyleSheet, Text, View, Image } from "react-native";
import ToggleButton from "../components/ToggleButton";

const thursdaySections = [
  {
    key: "8:30 AM",
    data: [{ key: 0, title: "Registration, breakfast" }]
  },
  {
    key: "10:00 AM",
    data: [{ key: 0, title: "Conference Keynote", speaker: "Lucy Vatne" }]
  }
];

const extractKey = ({ id }) => id;

const fridaySections = [
  {
    key: "10:30 AM",
    data: [{ key: 0, title: "More breakfast" }]
  },
  {
    key: "12:00 PM",
    data: [{ key: 0, title: "More Keynote", speaker: "Lucy Vatne" }]
  }
];

export default class Schedule extends React.Component {
  state = {
    selectedDay: "THURSDAY"
  };

  handlePressItem = item => {
    this.setState({ selectedDay: item });
  };

  renderItem = ({ item }) => {
    return (
      <View key={item.key}>
        <Text>{item.title}</Text>
      </View>
    );
  };

  renderSectionHeader = ({ section }) => {
    return (
      <View key={section.key}>
        <Text>{section.title}</Text>
      </View>
    );
  };

  render() {
    const { selectedDay } = this.state;

    return (
      <View style={styles.container}>
        <Image style={styles.image} source={require("../assets/hero.png")}>
          <Image style={styles.logo} source={require("../assets/logo.png")} />
          <Text style={styles.title}>React Europe Conference</Text>
          <ToggleButton
            items={["THURSDAY", "FRIDAY"]}
            value={selectedDay}
            onPressItem={this.handlePressItem}
          />
        </Image>
        <SectionList
          style={styles.list}
          sections={thursdaySections}
          renderItem={this.renderItem}
          renderSectionHeader={this.renderSectionHeader}
          // keyExtractor={extractKey}
        />
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: "#fff"
  },
  list: {
    flex: 1
  },
  image: {
    paddingVertical: 30,
    height: null,
    width: null,
    justifyContent: "center",
    alignItems: "center"
  },
  logo: {
    width: 46,
    height: 40,
    marginBottom: 10
  },
  title: {
    backgroundColor: "transparent",
    color: "white",
    fontSize: 24,
    marginBottom: 10
  }
});