Question 170149 in React native Question posted in
The official React Native documentation can be found here.

Why isn’t my React Native app receiving WebSocket messages on Android?

I’m creating a react native application using Expo that connects to a WebSocket server to display data from the messages. The code I have works for Web and iOS but for some reason will not work on Android. It looks like the WebSocket connects, but no messages are received.

A test websocket server is wss://webserver14.sms-timing.com:10015 and the start message is START 19476@teamsportreading

Here is an expo snack of with the code https://snack.expo.dev/@waddas/cranky-soda.

Any help is greatly appreciated!

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2

Answers


  1. 0

    Change the WebSocket URL from ws://webserver14.sms-timing.com:10015 to wss://webserver14.sms-timing.com:10015. This change will ensure that a secure WebSocket connection is established on both iOS and Android devices

    export default function App() {
  //...
  useEffect(() => {
    const socket = new WebSocket('wss://webserver14.sms-timing.com:10015');

    //...

  }, []);
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  2. 0

    Make sure that in the app.json file that you have the necessary permissions set.

    "android": {
    "permissions": [
    "INTERNET"
    ]
    }

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