Android : Android HttpPost Send ArrayList

i try to send arraylists with httpPost.i searched and learn how to can send httpPost.i wrote code with can send simple httpPost,but i do not know how i can send Arraylist. this is my code

public static void SendHttpPost(String Url,String method,ArrayList<String> args,int id)
{

    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost(Url);

    try {
        // Add your data
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
        nameValuePairs.add(new BasicNameValuePair("method", method));
        nameValuePairs.add(new BasicNameValuePair("args", args.ad));//here i would send  arraylist
        nameValuePairs.add(new BasicNameValuePair("id", String.valueOf(id)));
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

        // Execute HTTP Post Request
        HttpResponse response = httpclient.execute(httppost);
        System.out.println(response);

    } catch (ClientProtocolException e) {
        // TODO Auto-generated catch block
    } catch (IOException e) {
        // TODO Auto-generated catch block
    }
}

i would to send like this Arralist

{"objectType" : 0,"languageISOCode" : "eng"}

if anyone knows solution please help me