React Native Floating Action Button

React Native Floating Action Button

Here is an example of React Native Floating Action Button. It was first introduced in Android Material Design. When we have to show a ListView and also need a button on the same screen we can use the Floating Action Button. Gmail App is the best example where you can see the Floating Action Button. You can also see React Native Action Button with Multiple Option.

To Make Floating Action Button

To make a Floating Action Button we are using TouchableOpacity with the trick in StyleSheet.

TouchableOpacityStyle: {
   //Here is the trick
   position: 'absolute',
   width: 50,
   height: 50,
   alignItems: 'center',
   justifyContent: 'center',
   right: 30,
   bottom: 30,
},

The position property specifies the type of positioning method used for an element.
There are five different position values:

• static
• relative
• fixed
• absolute
• sticky

Elements are then positioned using the top, bottom, left, and right properties. However, these properties will not work unless the property position is set first. They also work differently depending on the position value. An element with position: absolute; is positioned relative to the nearest positioned ancestor (instead of position relative to the viewport, like fixed).

For more about the position, you can visit here. Though it is a link to show the CSS position it will work in React Native in the same manner. To start with this example

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

// React Native Floating Action Button
// https://aboutreact.com/react-native-floating-action-button/

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

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

const App = () => {
  const clickHandler = () => {
    //function to handle click on floating Action Button
    alert('Floating Button Clicked');
  };

  return (
    <SafeAreaView style={styles.container}>
      <View style={styles.container}>
        <Text style={styles.titleStyle}>
          Example of React Native Floating Action Button
        </Text>
        <Text style={styles.textStyle}>
          Click on Action Button to see Alert
        </Text>
        <TouchableOpacity
          activeOpacity={0.7}
          onPress={clickHandler}
          style={styles.touchableOpacityStyle}>
          <Image
            // FAB using TouchableOpacity with an image
            // For online image
            source={{
              uri:
                'https://raw.githubusercontent.com/AboutReact/sampleresource/master/plus_icon.png',
            }}
            // For local image
            //source={require('./images/float-add-icon.png')}
            style={styles.floatingButtonStyle}
          />
        </TouchableOpacity>
      </View>
    </SafeAreaView>
  );
};

export default App;

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: 'white',
    padding: 10,
  },
  titleStyle: {
    fontSize: 28,
    fontWeight: 'bold',
    textAlign: 'center',
    padding: 10,
  },
  textStyle: {
    fontSize: 16,
    textAlign: 'center',
    padding: 10,
  },
  touchableOpacityStyle: {
    position: 'absolute',
    width: 50,
    height: 50,
    alignItems: 'center',
    justifyContent: 'center',
    right: 30,
    bottom: 30,
  },
  floatingButtonStyle: {
    resizeMode: 'contain',
    width: 50,
    height: 50,
    //backgroundColor:'black'
  },
});

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

Output in Online Emulator

That was the React Native DatePicker Floating Action Button. 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. 🙂