IOSocket socket = new IOSocket("https://localhost:80", new MessageCallback() {
  @Override
  public void on(String event, JSONObject... data) {
    // Handle events
  }
  @Override
  public void onMessage(String message) {
    // Handle simple messages
  }
  @Override
  public void onMessage(JSONObject message) {
    // Handle JSON messages
  }
  @Override
  public void onConnect() {
    // Socket connection opened
  }
  @Override
  public void onDisconnect() {
    // Socket connection closed
  }
});
socket.connect();

IOSocket socket = new IOSocket("https://localhost:80/chat", ...)

// simple message
socket.send("Hello world");
// event with a json message
socket.emit("see", new JSONObject().put("name", "Spot").put("action", "run"));