React Native Custom Star Rating Bar

Custom Star Rating Bar

React Native Custom Star Rating Bar for displaying interactive star ratings. Compatible with both iOS and Android. After working on any product we need some Feedback to analyze the quality of our product, A simple and interactive Rating Bar is the easiest way to get feedback. So to integrate a Start Rating Bar here is a simple example.

First of all, you need to have images of the filled and empty star. You can use any image of your choice.

Render Using

for (var i = 1; i <= this.state.Max_Rating; i++) {
    React_Native_Rating_Bar.push(
        <TouchableOpacity
            activeOpacity={0.7}
            key={i}
            onPress={this.UpdateRating.bind(this, i)}>
            <Image
                style={styles.StarImage}
                source={
                i <= this.state.Default_Rating
                ? { uri: this.Star }
                : { uri: this.Star_With_Border }
               }
            />
        </TouchableOpacity>
    );
}

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

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

App.js

//This is an example code to make a Star Rating Bar // 
import React, { Component } from 'react';
//import react in our code. 
import {
  StyleSheet,
  View,
  Platform,
  Text,
  Image,
  TouchableOpacity,
} from 'react-native';
//import all the components we are going to use.

export default class Myapp extends Component<{}> {
  constructor() {
    super();
    this.state = {
      Default_Rating: 2,
      //To set the default Star Selected
      Max_Rating: 5,
      //To set the max number of Stars
    };
    //Filled Star. You can also give the path from local
    this.Star = 'https://raw.githubusercontent.com/AboutReact/sampleresource/master/star_filled.png';
    //Empty Star. You can also give the path from local
    this.Star_With_Border = 'https://raw.githubusercontent.com/AboutReact/sampleresource/master/star_corner.png';
  }
  UpdateRating(key) {
    this.setState({ Default_Rating: key });
    //Keeping the Rating Selected in state
  }
  render() {
    let React_Native_Rating_Bar = [];
    //Array to hold the filled or empty Stars
    for (var i = 1; i <= this.state.Max_Rating; i++) {
      React_Native_Rating_Bar.push(
        <TouchableOpacity
          activeOpacity={0.7}
          key={i}
          onPress={this.UpdateRating.bind(this, i)}>
          <Image
            style={styles.StarImage}
            source={
              i <= this.state.Default_Rating
                ? { uri: this.Star }
                : { uri: this.Star_With_Border }
            }
          />
        </TouchableOpacity>
      );
    }
    return (
      <View style={styles.MainContainer}>
        <Text style={styles.textStyle}>How was your experience with us</Text>
        <Text style={styles.textStyleSmall}>Please Rate Us</Text>
        {/*View to hold our Stars*/}
        <View style={styles.childView}>{React_Native_Rating_Bar}</View>
        <Text style={styles.textStyle}>
        {/*To show the rating selected*/}
          {this.state.Default_Rating} / {this.state.Max_Rating}
        </Text>
        <TouchableOpacity
          activeOpacity={0.7}
          style={styles.button}
          onPress={() => alert(this.state.Default_Rating)}>
          {/*Clicking on button will show the rating as an alert*/}
          <Text>Get Selected Value</Text>
        </TouchableOpacity>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  MainContainer: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    paddingTop: Platform.OS === 'ios' ? 20 : 0,
  },
  childView: {
    justifyContent: 'center',
    flexDirection: 'row',
    marginTop: 30,
  },
  button: {
    justifyContent: 'center',
    flexDirection: 'row',
    marginTop: 30,
    padding: 15,
    backgroundColor: '#8ad24e',
  },
  StarImage: {
    width: 40,
    height: 40,
    resizeMode: 'cover',
  },
  textStyle: {
    textAlign: 'center',
    fontSize: 23,
    color: '#000',
    marginTop: 15,
  },
  textStyleSmall: {
    textAlign: 'center',
    fontSize: 16,
    color: '#000',
    marginTop: 15,
  },
});

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 integrate Star Rating bar in your React Native Application. 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. 🙂