how to send data from android to server

Question

hi expert, I'm exploring to scan ssid and rssi from android and I'm able to do it, but now i have want send the data to the server, so i explore i found below code

    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost("http://101.34.45.45/rawData");

    try {
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);
        nameValuePairs.add(new BasicNameValuePair("userId", "00-22-68-E8-EC-F1"));
        nameValuePairs.add(new BasicNameValuePair("timestamp", "2010-07-01 11:11:11"));
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

        HttpResponse response = httpclient.execute(httppost);
        textView.setText(response.toString());

    } catch (ClientProtocolException e) {
    } catch (IOException e) {
    }

but now i'm having problem when add multi wifi data, the format should as below

http://101.34.45.45/rawData?data={"userId":"guest1","timestamp":"2010-07-01 08:58:23","wifi":[{"ssid":"guest","rssi":"40"},{"ssid":"guest1","rssi":"80"}]},

so how can done for the wifi parameter, can anyone help, I'm still trying for few varieties,

thanks

Answer 1

I would recommend you to switch to JSON for sending data to the server. Google gson is easiest to use to send and parse JSON.

{"userId":"guest1","timestamp":"2010-07-01 08:58:23","wifi":[{"ssid":"guest","rssi":"40"},{"ssid":"guest1","rssi":"80"}]}

You should use a JSON object having a JSON array as one of its items. The JSON array in turn contains another json object.

If you are using Google GSON, you should build a class hierarchy for the same. Heres how you should do the same.

Class data{

 String userId;
 String timestamp;
 Wifi wifi;
}

Class Wifi{

 String ssid;
 int rssi;
}

You can check here for a sample code on a similar problem on parsing json in android.

This may be useful too.