Android JSON to PHP Server and back

OK, i've got the PHP. The below retrieves POST ed data and returns the service

<?php

$data = file_get_contents('php://input');
$json = json_decode($data);
$service = $json->{'service'};

print $service;

?>

and the Android Code:

in onCreate()

path = "http://example.com/process/json.php";

    HttpClient client = new DefaultHttpClient();
    HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); // Timeout
                                                                            // Limit
    HttpResponse response;
    JSONObject json = new JSONObject();
    try {
        HttpPost post = new HttpPost(path);
        json.put("service", "GOOGLE");
        Log.i("jason Object", json.toString());
        post.setHeader("json", json.toString());
        StringEntity se = new StringEntity(json.toString());
        se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
                "application/json"));
        post.setEntity(se);
        response = client.execute(post);
        /* Checking response */
        if (response != null) {
            InputStream in = response.getEntity().getContent(); // Get the
                                                                // data in
                                                                    // the
                                                                    // entity
            String a = convertStreamToString(in);
            Log.i("Read from Server", a);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

and where ever you want

private static String convertStreamToString(InputStream is) {

    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();

    String line = null;
    try {
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return sb.toString();
}