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-cliRun the following commands to create a new React Native project
react-native init ProjectNameIf 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.Xreact-native init ProjectName --version react-native@nextThis 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
1 | cd Projectname |
Run the following command
1 | 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 dependancy 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
1 | cd ios && pod install && cd .. |
Open App.js in any code editor and replace the code with the following code
App.js
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | /*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://aboutreact.com/wp-content/uploads/2018/07/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 ProjectNamereact-native run-androidreact-native run-ios (macOS only).Android
IOS
This is how you can take screenshot programmatically. If you have any doubt 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. 🙂
Hello,
Is it possible to capture Screenshot of selected viewport.
Thanks
Nitesh
Hello Nitesh,
I not sure about it. I have to confirm it. I’ll let you know.
hey is it possible to make multiple screenshots and convert it into video?
No sorry, this is kind of image processing and not related to React. :p
Hell.
Is it possible to make multiple screenshots and convert it into video?
No sorry, this is kind of image processing and not related to React.
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
Have you integrated the library properly
As you have to link the library for that.
hello Author, how can we take a screenshot of Whatsapp chat, buy using this code-block?
Hello Ganesh,
I am not sure about it. Actually I am confused how can you do that? Are you planning to provide the floating widget to take the screenshot?
Why do you need that?
Hello, can i save screenshot in my gallary??
Sorry, I haven’t sis something like this yet. I’ll update the post soon for the same.
You would just use CameraRoll like this:
function onCapture(uri) {
CameraRoll.saveToCameraRoll(uri);
}
See: https://facebook.github.io/react-native/docs/cameraroll#savetocameraroll
Hello,
Is there any way to capture particular part?
No, this library does not support this.
It does support this, and that’s it’s main goal actually.
Now, there are a couple of ways to do it: declaratively, and programmatically. Check the docs:
https://github.com/gre/react-native-view-shot
Fir example there are declarative. The use a component, which receives a
refand some options. And then, you trigger the capture on component mount.For me, the programmatic fashion is better. I don’t want to trigger a capture when component mounts. So, I use
captureRefmethod. The code it’s quite similar to the one described in this article (captureScreen).Check the official docs, or read this answer here: https://stackoverflow.com/a/57532342/3001897
Good luck.
@Guillermo, Thanks for your valuable suggestions 🙂