Contents
QR Code Generation
If we have to share any small data between different users, we can use the QR Code. Generation of QR Code in React Native is very easy as we just have to install react-native-svg
and react-native-qrcode-svg
package, which will provide <QRCode/>
component to make QRCode.
QR Code is known as Quick Response Code is a trademark for a two-dimensional barcode. QR Code is a machine/camera readable block enabled code for encoding numeric value and alphabetic value. The QR Code stores information within a block of images and can store multiple types of information.
How to use QRCode Component?
<QRCode
//QR code value
value={qrvalue}
//size of QR Code
size={250}
//Color of the QR Code (Optional)
color="black"
//Background Color of the QR Code (Optional)
backgroundColor="white"
//Logo of in the center of QR Code (Optional)
logo={{
url:
'https://raw.githubusercontent.com/AboutReact/sampleresource/master/logosmalltransparen.png',
}}
//Center Logo size (Optional)
logoSize={30}
//Center Logo margin (Optional)
logoMargin={2}
//Center Logo radius (Optional)
logoBorderRadius={15}
//Center Logo background (Optional)
logoBackgroundColor="yellow"
/>
In this example, we are making a TextInput to get the value for QR Code and after clicking on “Generate QR Code” it will generate the QR Code.
You can also see how to make Barcode and QR Code Scanner using Camera in React Native.
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 init to make our React Native App. Assuming that you have node installed, you can use npm to install the react-native-cli
command line utility. Open the terminal and go to the workspace and run
npm install -g react-native-cli
Run the following commands to create a new React Native project
react-native init ProjectName
If you want to start a new project with a specific React Native version, you can use the --version argument:
react-native init ProjectName --version X.XX.X
react-native init ProjectName --version react-native@next
This will make a project structure with an index file named App.js in your project directory.
Installation of Dependency
Open the terminal and jump into your project
cd ProjectName
1. We need to install react-native-svg
dependency to have SVG support
npm install react-native-svg --save
2. To use QRCode
you need to install react-native-qrcode-svg
dependency
npm install react-native-qrcode-svg --save
This command will copy all the dependencies into your node_module directory. –save is optional, it is just to update the react-navigation dependency in your package.json file.
CocoaPods Installation
After the updation of React Native 0.60, they have introduced autolinking so we do not require to link the library but need to install pods. To install the pods use
cd ios && pod install && cd ..
Code for the Generation of QR Code
Now Open App.js in any code editor and replace the code with the following code.
App.js
// Generation of QR Code in React Native
// https://aboutreact.com/generation-of-qr-code-in-react-native/
// import React in our code
import React, {useState} from 'react';
// import all the components we are going to use
import {
SafeAreaView,
Text,
View,
StyleSheet,
TextInput,
TouchableOpacity,
} from 'react-native';
import QRCode from 'react-native-qrcode-svg';
const App = () => {
const [inputText, setInputText] = useState('');
const [qrvalue, setQrvalue] = useState('');
return (
<SafeAreaView style={{flex: 1}}>
<View style={styles.container}>
<Text style={styles.titleStyle}>
Generation of QR Code in React Native
</Text>
<QRCode
//QR code value
value={qrvalue ? qrvalue : 'NA'}
//size of QR Code
size={250}
//Color of the QR Code (Optional)
color="black"
//Background Color of the QR Code (Optional)
backgroundColor="white"
//Logo of in the center of QR Code (Optional)
logo={{
url:
'https://raw.githubusercontent.com/AboutReact/sampleresource/master/logosmalltransparen.png',
}}
//Center Logo size (Optional)
logoSize={30}
//Center Logo margin (Optional)
logoMargin={2}
//Center Logo radius (Optional)
logoBorderRadius={15}
//Center Logo background (Optional)
logoBackgroundColor="yellow"
/>
<Text style={styles.textStyle}>
Please insert any value to generate QR code
</Text>
<TextInput
style={styles.textInputStyle}
onChangeText={
(inputText) => setInputText(inputText)
}
placeholder="Enter Any Value"
value={inputText}
/>
<TouchableOpacity
style={styles.buttonStyle}
onPress={() => setQrvalue(inputText)}>
<Text style={styles.buttonTextStyle}>
Generate QR Code
</Text>
</TouchableOpacity>
</View>
</SafeAreaView>
);
};
export default App;
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: 'white',
justifyContent: 'center',
alignItems: 'center',
textAlign: 'center',
padding: 10,
},
titleStyle: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
textStyle: {
textAlign: 'center',
margin: 10,
},
textInputStyle: {
flexDirection: 'row',
height: 40,
marginTop: 20,
marginLeft: 35,
marginRight: 35,
margin: 10,
},
buttonStyle: {
backgroundColor: '#51D8C7',
borderWidth: 0,
color: '#FFFFFF',
borderColor: '#51D8C7',
alignItems: 'center',
borderRadius: 5,
marginTop: 30,
padding: 10,
},
buttonTextStyle: {
color: '#FFFFFF',
paddingVertical: 10,
fontSize: 16,
},
});
// Generation of QR Code in React Native
// https://aboutreact.com/generation-of-qr-code-in-react-native/
// import React in our code
import React, {useState, useRef} from 'react';
// import all the components we are going to use
import {
SafeAreaView,
Text,
View,
StyleSheet,
TextInput,
TouchableOpacity,
Share,
} from 'react-native';
import QRCode from 'react-native-qrcode-svg';
const App = () => {
const [inputText, setInputText] = useState('');
const [qrvalue, setQrvalue] = useState('');
let myQRCode = useRef();
const shareQRCode = () => {
myQRCode.toDataURL((dataURL) => {
console.log(dataURL);
let shareImageBase64 = {
title: 'React Native',
url: `data:image/png;base64,${dataURL}`,
subject: 'Share Link', // for email
};
Share.share(shareImageBase64).catch((error) => console.log(error));
});
};
return (
<SafeAreaView style={{flex: 1}}>
<View style={styles.container}>
<Text style={styles.titleStyle}>
Generation of QR Code in React Native
</Text>
<QRCode
getRef={(ref) => (myQRCode = ref)}
// ref={myQRCode}
//QR code value
value={qrvalue ? qrvalue : 'NA'}
//size of QR Code
size={250}
//Color of the QR Code (Optional)
color="black"
//Background Color of the QR Code (Optional)
backgroundColor="white"
//Center Logo size (Optional)
logoSize={30}
//Center Logo margin (Optional)
logoMargin={2}
//Center Logo radius (Optional)
logoBorderRadius={15}
//Center Logo background (Optional)
logoBackgroundColor="yellow"
/>
<Text style={styles.textStyle}>
Please insert any value to generate QR code
</Text>
<TextInput
style={styles.textInputStyle}
onChangeText={(inputText) => setInputText(inputText)}
placeholder="Enter Any Value"
value={inputText}
/>
<TouchableOpacity
style={styles.buttonStyle}
onPress={() => setQrvalue(inputText)}>
<Text style={styles.buttonTextStyle}>
Generate QR Code
</Text>
</TouchableOpacity>
<TouchableOpacity
style={styles.buttonStyle}
onPress={shareQRCode}>
<Text style={styles.buttonTextStyle}>
Share QR Code
</Text>
</TouchableOpacity>
</View>
</SafeAreaView>
);
};
export default App;
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: 'white',
justifyContent: 'center',
alignItems: 'center',
textAlign: 'center',
padding: 10,
},
titleStyle: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
textStyle: {
textAlign: 'center',
margin: 10,
},
textInputStyle: {
flexDirection: 'row',
height: 40,
marginTop: 20,
marginLeft: 35,
marginRight: 35,
margin: 10,
},
buttonStyle: {
backgroundColor: '#51D8C7',
borderWidth: 0,
color: '#FFFFFF',
borderColor: '#51D8C7',
alignItems: 'center',
borderRadius: 5,
marginTop: 30,
padding: 10,
},
buttonTextStyle: {
color: '#FFFFFF',
paddingVertical: 10,
fontSize: 16,
},
});
To Run the React Native App
Open the terminal again and jump into your project using.
cd ProjectName
To run the project on an Android Virtual Device or on real debugging device
react-native run-android
or on the iOS Simulator by running (macOS only)
react-native run-ios
Output Screenshots
That was the React Native Generate QR Code. If you have any doubts or you 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. 🙂
Can you tell how to share the QR code .
I found this links but looks like old code can you provide better solution.
https://stackoverflow.com/questions/51269475/how-to-share-generated-qr-code-in-react-native
https://www.iditect.com/how-to/53131072.html
Thanks
Hello Yuvin, Kind of busy while updating posts, I’ll do it after that
No Problem, You are doing good. Take your time and also if time permits can you make one for Push notification, for ex: if i add a new record(firebase database) and submit then every one should receive a notification stating a new record added tap to see the newly added records.
Let me till when can i hope for this 🙂
It will be a kind of great help for me.
May be till end of this month
Ok I’ll Wait and also try to start for project covering , payment, admob, redux, sending notification to everyone on click and what ever treasure you have 🙂
How can i share the qr code
Updated for the same.