stopListener

         SocketManager socketManager = new SocketManager(false);
         socketManager.startListener(3218, new Runnable() {
            
            public void run() {
                while (socketManager.continueListening()) {
                    // do listener's workflow
                }
                // listener's workflow when has been stopped
            }
        });

        // your code's workflow

        socketManager.stopListener(); // --> the single listener will be stopped