React Native Example to Take Screenshot Programmatically

React Native View Shot

Here is an Example to Take Screenshot Programmatically in React Native. To take Screenshot of your screen we have an inbuilt Screenshot option provided by mobile manufacturers but you can also make this in your own Application too. To take a Screenshot we will use a very good library called react-native-view-shot. Which provides captureScreen API which is very easy to use.

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

To use captureScreen we need to install react-native-view-shot package.

To install this open the terminal and jump into your project

cd Projectname

Run the following command

npm install react-native-view-shot --save

This command will copy all the dependencies into your node_module directory, You can find the directory in node_module the directory named react-native-view-shot.

–save is optional, it is just to update the react-native-view-shot 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. So to install pods use

cd ios && pod install && cd ..

Code to Take Screenshot Programmatically

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

App.js

/*This is an React Native Example to Take Screenshot Programmatically */
import React, { Component } from 'react';
import { StyleSheet, Text, View, Image, Button, Platform } from 'react-native';
import { captureScreen } from "react-native-view-shot";
export default class App extends Component {
  constructor(){
    super();
    this.state={
      //initial image to the <Image>
      imageURI : 'https://raw.githubusercontent.com/AboutReact/sampleresource/master/sample_img.png'
    }
  }
  takeScreenShot=()=>{
    //handler to take screnshot
    captureScreen({
      //either png or jpg or webm (Android). Defaults to png
      format: "jpg",
      //quality 0.0 - 1.0 (default). (only available on lossy formats like jpg)
      quality: 0.8
    })
    .then(
      //callback function to get the result URL of the screnshot
      uri => this.setState({ imageURI : uri }),
      error => console.error("Oops, Something Went Wrong", error)
    );
  }
  render() {
    return (
      <View style={styles.MainContainer}>
          <Text style={{fontSize:20}}>Click on Button Below to Take ScreenShot</Text>
          <Image 
              source={{uri : this.state.imageURI}} 
              style={{width: 200, height: 300, resizeMode: 'contain', marginTop: 5}} />
          <Button title="Take Screenshot" onPress={this.takeScreenShot} />
      </View>
    );
  }
}
const styles = StyleSheet.create({
  MainContainer: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#fff',
    borderWidth: 1,
    borderColor: '#000',
  }
});

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
react-native run-ios (macOS only).

Output Screenshots

Android

          

IOS

   

This is how you can take a screenshot programmatically. 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. 🙂


Related Posts

17 thoughts on “React Native Example to Take Screenshot Programmatically”

  1. Cannot read property ‘captureScreen’ of undefined

    captureScreen
    index.js:136:20
    Object.App._this.takeScreenShot [as onPress]
    App.js:16:18
    Object.touchableHandlePress
    TouchableOpacity.js:235:37
    Object._performSideEffectsForTransition
    Touchable.js:878:13
    Object._receiveSignal
    Touchable.js:777:11
    Object.touchableHandleResponderRelease
    Touchable.js:488:9
    Object.invokeGuardedCallbackImpl
    ReactNativeRenderer-dev.js:93:9
    invokeGuardedCallback
    ReactNativeRenderer-dev.js:318:30
    invokeGuardedCallbackAndCatchFirstError
    ReactNativeRenderer-dev.js:342:24
    executeDispatch
    ReactNativeRenderer-dev.js:715:2

    Reply

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.