Set Alpha Opacity / Transparency of Image View in React Native

React Native Image View Opacity

This is an Example to Set Alpha Opacity / Transparency of Image View in React Native.  In this example, we will set the alpha opacity of the Image View. It is useful when you use the image in the background and show something over it like we generally do in Splash Screen of the App where we have an Image in background and Application name and logo over it. In this situation, you have to change the opacity of the image to enhance the visibility of the text or another component over it. We will set the opacity in style to reduce the visibility of the image. So let’s get started.

Set Alpha Opacity / Transparency in React Native

<Image
  source={{uri:'https://raw.githubusercontent.com/AboutReact/sampleresource/master/old_logo.png'}}
  style={{opacity: 0.2}} //Min value 0 , Max value 1
/>

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.

Code to Set Alpha Opacity

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

App.js

//Set Alpha Opacity / Transparency of Image View in React Native
//https://aboutreact.com/react-native-set-opacity-of-image/

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

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

const App = () => {
  return (
    <SafeAreaView style={{flex: 1}}>
      <View style={styles.container}>
        <Text>Original</Text>
        <Image
          source={{
            uri:
              'https://raw.githubusercontent.com/AboutReact/sampleresource/master/old_logo.png',
          }}
          style={{
            width: 200,
            height: 200,
            resizeMode: 'center',
          }}
        />
        <Text>With Alpha Opacity</Text>
        <Image
          source={{
            uri:
              'https://raw.githubusercontent.com/AboutReact/sampleresource/master/old_logo.png',
          }}
          style={{
            width: 200,
            height: 200,
            resizeMode: 'center',
            //resizeMode can be cover, contain, stretch, repeat, center
            opacity: 0.2,
            //you can set between 0 to 1
          }}
        />
      </View>
    </SafeAreaView>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    margin: 10,
    marginTop: 30,
    padding: 30,
    alignItems: 'center',
  },
});

export default App;

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

Download Source Code

Output Screenshots

IOS

Android

Output in Online Emulator

This is how you can Set Alpha Opacity / Transparency of Image View in React Native. 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. 🙂


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