E/error: com.android.volley.NoConnectionError: java.net.ConnectException: failed to connect to /127.0.0.1 (port 4567) after 2500ms: isConnected failed: ECONNREFUSED (Connection refused) This is the server part:

Spark.post("/up", new Route() { public Object handle(Request req, Response res) { System.out.println(req.queryParams()); return "its something"; } });