Sent arduino sensor readings to Android

Using Arduino Sensors
1

Hello,

I'm trying to read de sensors values of Arduino and sent this by wifi to android.
I make a httpget request to Arduino, and it sent me a page with this structure:
{ "temperature": "22"} for example...

I read this in webnavigator in notebook and it appears in browser.
But the Android give an error: W/System.err﹕ org.apache.http.client.ClientProtocolException

The Arduino sent this:

 sensor.read11(dht_dpin);
           server.println("HTTP 1.1/200 OK");
           server.println("Content-Type: application/json");
           server.println();
           server.print("{ \"temperatura\": \"");
           server.print(sensor.temperature, 1);
           server.println(" \" }");

and try to read with this in Android:

public static void getJson(final String url) {
    new Thread(new Runnable() {
        @Override
        public void run() {
            Object retorno = null;
            try {
                HttpClient httpclient = new DefaultHttpClient();
                HttpGet request = new HttpGet();
                request.setURI(new URI(url));
                HttpResponse response = httpclient.execute(request);
                InputStream content = response.getEntity().getContent();
                Reader reader = new InputStreamReader(content);
                Gson gson = new Gson();
                retorno = gson.fromJson(reader, HashMap.class);
                content.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }).start();
}

Can someone helpme?