Is there any way to detect java server application is online automatically through android app?

Question

I'm working on a android application which makes client server communication over Socket. The server is on java application(desktop) & client is android app. Problem: I don't want the user to go and connect to it. I just want the app to detect that the java app is online and connect to it automatically without knowing the user.

Answer 1

Assuming your android app is coded in java.

For communication to server I would use something like this:

@Override
    public void run() {
        if (connected == false)
            {
              hostAvailabilityCheck();
            }
        }
    };

public static boolean hostAvailabilityCheck() { 
    try (Socket s = new Socket(SERVER_ADDRESS, TCP_SERVER_PORT)) {
        return true;
    } catch (IOException ex) {
        /* if errors */
    }
    return false;
}

Anyway, I cant help you any further because I dont know how your code looks like.