Android how to call web service with parameters and get jsonarray as responce

Try this: here i am using gson library to parse json : https://code.google.com/p/google-gson/downloads/detail?name=google-gson-2.2.4-release.zip&can=1&q=

**With GET Method**

    protected SignUpResponseJson doInBackground(String... params) {

        urlString = "http://www.xxxxx.com?page=1"
        url  =  new URL(urlString);

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setUseCaches(false);
        connection.setConnectTimeout(Integer.parseInt(context.getResources().getString(R.string.timeout))); //set timeout to 5 seconds
        connection.setReadTimeout(Integer.parseInt(context.getResources().getString(R.string.timeout))); //set timeout to 5 seconds

        connection.connect();

        HttpURLConnection httpConnection  =  (HttpURLConnection) connection;
        int responseCode  =  httpConnection.getResponseCode();
        //      Log.i("test-responsecode",String.valueOf(responseCode));
        if (responseCode   ==   HttpURLConnection.HTTP_OK) {
            //          Log.i("test","inside if");
            InputStream in  =  httpConnection.getInputStream();
            Gson gson  =  new Gson();
            Reader r  =  new InputStreamReader(in);

            Type DataType  =  new TypeToken<SignUpResponseJson>() {
            }.getType();

            signUpResponseJsons  =  gson.fromJson(r,DataType);
            Log.i(TAG, gson.toJson(signUpResponseJsons).toString());

        }

    }

OR With Post Method

http://fahmirahman.wordpress.com/2011/04/26/the-simplest-way-to-post-parameters-between-android-and-php/

public void postData(){  
        // Create a new HttpClient and Post Header
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://www.yourdomain.com/post.php");  

        try {
            // Add your data
            List nameValuePairs = new ArrayList(1);
            nameValuePairs.add(new BasicNameValuePair("data1", "dataValue"));
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));  

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

            InputStream is = response.getEntity().getContent();

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