socket.io-client not working on Android API 28 (React Native)

[leurs247]

I want to use Socket.IO-client with React Native. My environment:

• React Native 0.61.5
• React 16.9.0
• Socket.IO-client ^2.3.0

My code works on iOS, but not on Android. I'm testing on Android version 9.0 (Pie) - API 28. I do not get any errors, it just doesn't work. I'm trying to log every connection server-side (NodeJS). When I open the app in the iOS-emulator, I see a log (eg. "connection established"). When I open the same app using Android, I don't see a log.

Front-end code (simplified!): React Native

socket = io('https://127.0.0.1:8001', {
    secure: true,
    transports: ['websocket']
})
socket.on('message', () => console.log('message received'))
socket.close()

Back-end code (simplified!): NodeJS

io.on('connection', socket => {
    console.log('connection established')
    socket.on('disconnect', () => console.log('disconnected'))
})

[ashlyWeiting]

Same issue here 😥

[ryoid]

Same issue, without transports: ['websocket'] it works.

Edit: I switched to [email protected] and seems to be working.

[sfaman]

Same Issue I am facing....

[rachitgupta98]

Check out this https://brentmarquez.com/uncategorized/how-to-get-socket-io-to-work-with-react-native/

[MatheusLima7]

Same issue here!!

[darrachequesne]

Does it happen on the Android emulator, or on a real device?

On a real device, you need to be on the same network as your server (WiFi for example), and use its IP address:

const socket = io("http://192.168.0.28:3000");

[recepaltas]

Just remove http://123.456.78.0:2053 .Then change https://domain.name .

const socket = io("https://blabla.com:2053");

[darrachequesne]

For future readers:

Please check our guide with React Native here: https://socket.io/how-to/use-with-react-native

Please reopen if needed.