Visualize data with Speedometer Graph in React Native

Data Visualization using Speedometer Graph

This is an Example to Visualize data with Speedometer Graph in React Native using react-native-speedometer. We all have seen the speedometer in the vehicle which shows the speed of the vehicle. It is always really cool to visualize a continuous changing data in the speedometer as it shows the current state in a very effective way which is easy to understand. In the React Native, we can make the same Speedometer type graph to show different data or you can also use it as a loader for any progress.

For more options to render the graphs you can also see:

  1. 7 Type of Graph using React Native Chart Kit
  2. Example to Make 3 Different Type of Pie Chart in React Native

For this example, we will use RNSpeedometer component provided by react-native-speedometer library. This library is very easy to implement and provides lots of customization options.

How to use RNSpeedometer Component

<RNSpeedometer
  value={this.state.value}
  //value for Speedometer
  size={200}
  //Size of Speedometer
  minValue={0}
  //Min value for Speedometer
  maxValue={100}
  //Max value for Speedometer
  allowedDecimals={0}
  //Decimals value allowed or not
  labels={[
    {
      name: 'Low Risk',
      labelColor: '#ff2900',
      activeBarColor: '#ff2900',
    },
    {
      name: 'Medium Risk',
      labelColor: '#f4ab44',
      activeBarColor: '#f4ab44',
    },
    {
      name: 'High Risk',
      labelColor: '#00ff6b',
      activeBarColor: '#00ff6b',
    },
  ]}
  //Labels for the different steps of Speedometer
/>

This library provides lots of props to customize which can be seen here.

In this example, we will make a Speedometer graph by setting custom labels, label color, and active bar color. There will be an input on the screen to enter the value and this value will change the speedometer.

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 RNSpeedometer we need to install react-native-speedometer dependency.

To install this open the terminal and jump into your project using

cd ProjectName

Run the following command to install

npm install react-native-speedometer --save

This command will copy all the dependency into your node_module directory.

Code for Speedometer Graph

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

App.js

//Example of React Native Speedometer Graph
import React, { Component } from 'react';
//Import React
import { SafeAreaView, StyleSheet, TextInput, Text, View } from 'react-native';
//Import basic component from React Native
import RNSpeedometer from 'react-native-speedometer';
//Import library for Speedometer

export default class App extends Component {
  state = { value: 0 };
  //Initial value for Speedometer
  onChange = value => this.setState({ value: parseInt(value) });
  //setting the value for Speedometer
  render() {
    return (
      <SafeAreaView style={styles.container}>
        <RNSpeedometer
          value={this.state.value}
          //value for Speedometer
          size={200}
          //Size of Speedometer
          minValue={0}
          //Min value for Speedometer
          maxValue={100}
          //Max value for Speedometer
          allowedDecimals={0}
          //Decimals value allowed or not
          labels={[
            {
              name: 'Low Risk',
              labelColor: '#ff2900',
              activeBarColor: '#ff2900',
            },
            {
              name: 'Medium Risk',
              labelColor: '#f4ab44',
              activeBarColor: '#f4ab44',
            },
            {
              name: 'High Risk',
              labelColor: '#00ff6b',
              activeBarColor: '#00ff6b',
            },
          ]}
          //Labels for the different steps of Speedometer
        />
        <View style={{ marginTop: 70, padding: 20 }}>
          <Text style={{ fontSize: 20 }}>
            Enter the value for the speedometer graph between 0 to 100
          </Text>
          <TextInput
            placeholder="Enter Speedometer Value"
            style={styles.textInput}
            onChangeText={this.onChange}
          />
        </View>
      </SafeAreaView>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  textInput: {
    height: 25,
    fontSize: 16,
    marginTop: 30,
    borderBottomWidth: 0.3,
    borderBottomColor: 'black',
  },
});

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

 

        

Output in Online Emulator


This is how you can Visualize data with Speedometer Graph in React Native using react-native-speedometer. 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

Leave a Comment

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