url = new URL(gmap);
   HttpURLConnection con = (HttpURLConnection) url.openConnection();
   con.setReadTimeout(10000);
   con.setConnectTimeout(15000);
   con.setRequestMethod("GET");
   con.setDoInput(true);
   con.connect();

   BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));
   Log.w("a","a");
   String payload = reader.readLine();


이런코드에서 con.connect()부분에서 에러가 발생합니다.
java.net.UnknownException: Host is unresolved: ajax.google.apis.com:80 인데요..;

어떤 에러인건가요 ㅠ