node.js - nodejs socket.io can't receive connection from android Socket

Question

I want my application to use socket.io(nodejs) to communicate with the server. but, my server can't receive connection message. client using kotlin,

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    try {
        mSocket = IO.socket("http://192.168.29.XXX:8080")
        Log.d("TAG", "try")
        mSocket.connect()
    } catch (e: URISyntaxException) {
        Log.d("ERR", e.toString())
    }
}

server code.

var app = require('express')();
var server = require('http').createServer(app);
var io = require('socket.io')(server);
app.get('/hi', (req, res) => {
  console.log("user connect22");
  res.send({"result":"hello"});
});

io.on('connection', function(socket) {
  console.log("user connect");

  socket.on('lightOn', function(){
    console.log("light on");
    io.emit('lightOn', "light");
  });

  socket.on('lightOff', function(){
    console.log("light off");
    io.emit('lightOff', "light");
  });
});

server.listen(8080, function(){
  console.log("server on 8080");
});

lient create socket object, but my server's io.on('connection') does not work. I've looked for many ways to solve this problem

1. add INTERNET permission and android:usesCleartextTraffic="true" to manifest
2. Asynchronous work with threads
3. transform dynamic IP to static IP(122.XXX.XXX.XXX)
4. Turn Off Firewall on my PC
5. Using "socket.connect" in service

and my server and client do not cause any errors.

question from:https://stackoverflow.com/questions/66056096/nodejs-socket-io-cant-receive-connection-from-android-socket

Answer 1

Waitting for answers