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copied!<p>The key for me was to create a class called URLWithParams or something because AsyncTask will allow only 1 type to be sent IN, and I needed both the URL and the params for the HTTP request.</p> <pre><code>public class URLWithParams { public String url; public List<NameValuePair> nameValuePairs; public URLWithParams() { nameValuePairs = new ArrayList<NameValuePair>(); } } </code></pre> <p>and then I send it to a JSONClient:</p> <pre><code>public class JSONClient extends AsyncTask<URLWithParams, Void, String> { private final static String TAG = "JSONClient"; ProgressDialog progressDialog ; GetJSONListener getJSONListener; public JSONClient(GetJSONListener listener){ this.getJSONListener = listener; } @Override protected String doInBackground(URLWithParams... urls) { return connect(urls[0].url, urls[0].nameValuePairs); } public static String connect(String url, List<NameValuePair> pairs) { HttpClient httpclient = new DefaultHttpClient(); if(url == null) { Log.d(TAG, "want to connect, but url is null"); } else { Log.d(TAG, "starting connect with url " + url); } if(pairs == null) { Log.d(TAG, "want to connect, though pairs is null"); } else { Log.d(TAG, "starting connect with this many pairs: " + pairs.size()); for(NameValuePair dog : pairs) { Log.d(TAG, "example: " + dog.toString()); } } // Execute the request HttpResponse response; try { // Prepare a request object HttpPost httpPost = new HttpPost(url); httpPost.setEntity(new UrlEncodedFormEntity(pairs)); response = httpclient.execute(httpPost); // Examine the response status Log.i(TAG,response.getStatusLine().toString()); BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8")); String json = reader.readLine(); return json; } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } @Override protected void onPostExecute(String json ) { getJSONListener.onRemoteCallComplete(json); } public interface GetJSONListener { public void onRemoteCallComplete(String jsonFromNet); } } </code></pre> <p>Then call it from my main class like this</p> <pre><code>public class BookCatalog implements GetJSONListener { private final String TAG = this.getClass().getSimpleName(); private String catalog_url = "URL"; private void getCatalogFromServer() { URLWithParams mURLWithParams = new URLWithParams(); mURLWithParams.url = catalog_url; try { JSONClient asyncPoster = new JSONClient(this); asyncPoster.execute(mURLWithParams); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } @Override public void onRemoteCallComplete(String jsonBookCatalogList) { Log.d(TAG, "received json catalog:"); Log.d(TAG, jsonBookCatalogList); JSONObject bookCatalogResult; try { bookCatalogResult = (JSONObject) new JSONTokener(jsonBookCatalogList).nextValue(); JSONArray books = bookCatalogResult.getJSONArray("books"); if(books != null) { ArrayList<String> newBookOrdering = new ArrayList<String>(); int num_books = books.length(); BookCatalogEntry temp; DebugLog.d(TAG, "apparently we found " + Integer.toString(num_books) + " books."); for(int book_id = 0; book_id < num_books; book_id++) { JSONObject book = books.getJSONObject(book_id); String title = book.getString("title"); int version = book.getInt("price"); } } } catch (JSONException e) { e.printStackTrace(); } } } </code></pre>

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