Example to make Section List in React Native

Section List in React Native

This is an example to make Section List in React Native. Section List is a list of sections and headings. It is among the simple but mostly used components. This example will be helpful for you to understand how to use Section List in React Native. You can also check FlatList example for the Simple list.

To Import Section List in React Native Code

import {SectionList} from 'react-native'

Render Using

<SectionList 
   ItemSeparatorComponent={Separator View} 
   sections={Section Data} 
   renderSectionHeader={({ section }) => (Header View)} 
   renderItem={({ item }) => (Single Item View)} 
   keyExtractor={(item, index) => index} 
/>

In this example, we will make a list of country names with the header of their initials. So let’s get started.

To Make a React Native App

Getting started with React Native will help you to know more about the way you can make a React Native project. We are going to use react native command line interface to make our React Native App.

If you have previously installed a global react-native-cli package, please remove it as it may cause unexpected issues:

npm uninstall -g react-native-cli @react-native-community/cli

Run the following commands to create a new React Native project

npx react-native init ProjectName

If you want to start a new project with a specific React Native version, you can use the --version argument:

npx react-native init ProjectName --version X.XX.X

Note If the above command is failing, you may have old version of react-native or react-native-cli installed globally on your pc. Try uninstalling the cli and run the cli using npx.

This will make a project structure with an index file named App.js in your project directory.

Code

Open App.js in any code editor and replace the code with the following code

App.js

// Example to make Section List in React Native
// https://aboutreact.com/react-native-sectionlist/

// import React in our code
import React from 'react';

// import all the components we are going to use
import {
  SafeAreaView,
  StyleSheet,
  View,
  SectionList,
  Text
} from 'react-native';

const App = () => {
  let A = [
    {id: '1', value: 'Afghanistan'},
    {id: '2', value: 'Afghanistan'},
    {id: '3', value: 'Afghanistan'},
  ];
  let B = [
    {id: '4', value: 'Benin'},
    {id: '5', value: 'Bhutan'},
    {id: '6', value: 'Bosnia'},
    {id: '7', value: 'Botswana'},
    {id: '8', value: 'Brazil'},
    {id: '9', value: 'Brunei'},
    {id: '10', value: 'Bulgaria'},
  ];
  let C = [
    {id: '11', value: 'Cambodia'},
    {id: '12', value: 'Cameroon'},
    {id: '13', value: 'Canada'},
    {id: '14', value: 'Cabo'},
  ];

  const FlatListItemSeparator = () => {
    return (
      //Item Separator
      <View style={styles.listItemSeparatorStyle} />
    );
  };

  return (
    <SafeAreaView style={styles.container}>
      <View style={styles.container}>
        <SectionList
          ItemSeparatorComponent={FlatListItemSeparator}
          sections={[
            {title: 'Section Head For Data A', data: A},
            {title: 'Section Head For Data B', data: B},
            {title: 'Section Head For Data C', data: C},
          ]}
          renderSectionHeader={({section}) => (
            <Text style={styles.sectionHeaderStyle}>
              {section.title}
            </Text>
          )}
          renderItem={({item}) => (
            // Item for the FlatListItems
            <Text
              style={styles.sectionListItemStyle}
              //Item Separator View
              onPress={() => alert(JSON.stringify(item))}>
              {item.value}
            </Text>
          )}
          keyExtractor={(item, index) => index}
        />
      </View>
    </SafeAreaView>
  );
};

export default App;

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    backgroundColor: 'white',
  },
  sectionHeaderStyle: {
    backgroundColor: '#CDDC89',
    fontSize: 20,
    padding: 5,
    color: '#fff',
  },
  sectionListItemStyle: {
    fontSize: 15,
    padding: 15,
    color: '#000',
    backgroundColor: '#F5F5F5',
  },
  listItemSeparatorStyle: {
    height: 0.5,
    width: '100%',
    backgroundColor: '#C8C8C8',
  },
});

To Run the React Native App

Open the terminal again and jump into your project using.

cd ProjectName

1. Start Metro Bundler

First, you will need to start Metro, the JavaScript bundler that ships with React Native. To start Metro bundler run following command

npx react-native start

Once you start Metro Bundler it will run forever on your terminal until you close it. Let Metro Bundler run in its own terminal. Open a new terminal and run the application.

2. Start React Native Application

To run the project on an Android Virtual Device or on real debugging device

npx react-native run-android

or on the iOS Simulator by running (macOS only)

npx react-native run-ios

Output Screenshots

Android

IOS

Output in Online Emulator

This is how you can make a SectionList. If you have any doubts or want to share something about the topic you can comment below or contact us here. There will be more posts coming soon. Stay tuned!

Hope you liked it. 🙂