private class FetchSQL extends AsyncTask<Void,Void,String> {
    	Connection conn;
    	Statement st;
        @Override
        protected String doInBackground(Void... params) {
            String retval = "";
            try {
                Class.forName("org.postgresql.Driver");
            	Class.forName("java.sql.Driver");

            } catch (ClassNotFoundException e) {
                e.printStackTrace();
                retval = e.toString();
            }


                //DriverManager.setLoginTimeout(10);

                try {
					conn = DriverManager.getConnection("jdbc:postgresql://cirrus.no-ip.org:5432/postgres", "postgres", "l+!plu");
					st = conn.createStatement();
					System.out.println("oi");

                	PreparedStatement ps = conn.prepareStatement("INSERT INTO usuario VALUES (?, ?)");
                    ps.setString(1, "Faabio");
                    ps.setString(2, "'12234'");
                    ps.executeUpdate();
                    ps.close();
                }
                catch (SQLException e1) {
                	e1.printStackTrace();
				}
                return retval;

            }