Today we will learn how to connect our React Native application to a WebSocket using the https://www.npmjs.com/package/react-native-websocket library
Setting up React Native Application
- Create a New React Native Project:
Create a new React Native project usingreact-native-cli
:
npx react-native init MyReactNativeApp cd MyReactNativeApp
- Install WebSocket Dependencies:
Install thereact-native-websocket
library to handle WebSocket connections in React Native:
npm install --save react-native-websocket
- Implement WebSocket Component in React Native:
Replace the content ofApp.js
with the following code:
import React, { useState } from 'react'; import { View, Text, TextInput, Button } from 'react-native'; import { WebSocketProvider, useWebSocket } from 'react-native-websocket'; function App() { const [message, setMessage] = useState(''); const { sendMessage } = useWebSocket('ws://localhost:8000/ws/1'); const handleMessageChange = (text) => { setMessage(text); }; const handleSendMessage = () => { sendMessage({ message }); }; return ( <View> <Text>WebSocket React Native</Text> <TextInput value={message} onChangeText={handleMessageChange} placeholder="Write a message" /> <Button onPress={handleSendMessage} title="Send Message" /> </View> ); } function AppWithWebSocket() { return ( <WebSocketProvider url="ws://localhost:8000/ws/1"> <App /> </WebSocketProvider> ); } export default AppWithWebSocket;
Make sure to replace ws://localhost:8000/ws/1
with the URL of your FastAPI server.
- Run the React Native Application:
Run the React Native application:
npx react-native run-android
or
npx react-native run-ios
Visit http://localhost:3000
in your browser and you will see the React Native application. You can write messages, send them, and see the responses from the FastAPI server through the WebSocket.
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Configuración de la Aplicación React Native
- Install WebSocket Dependencies:
Install thereact-native-websocket
library to handle WebSocket connections in React Native:
npm install --save react-native-websocket
- Implement WebSocket Component in React Native:
Replace the content ofApp.js
with the following code:
import React, { useState } from 'react'; import { View, Text, TextInput, Button } from 'react-native'; import { WebSocketProvider, useWebSocket } from 'react-native-websocket'; function App() { const [message, setMessage] = useState(''); const { sendMessage } = useWebSocket('ws://localhost:8000/ws/1'); const handleMessageChange = (text) => { setMessage(text); }; const handleSendMessage = () => { sendMessage({ message }); }; return ( <View> <Text>WebSocket React Native</Text> <TextInput value={message} onChangeText={handleMessageChange} placeholder="Write a message" /> <Button onPress={handleSendMessage} title="Send Message" /> </View> ); } function AppWithWebSocket() { return ( <WebSocketProvider url="ws://localhost:8000/ws/1"> <App /> </WebSocketProvider> ); } export default AppWithWebSocket;
Make sure to replace ws://localhost:8000/ws/1
with the URL of your FastAPI server.
- Run the React Native Application:
Run the React Native application:
npx react-native run-android
or
npx react-native run-ios
Visit http://localhost:3000
in your browser, and you will see the React Native application. You can write messages, send them, and see the responses from the FastAPI server through WebSocket.