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POAsyncTask and JSON, onSuccess doesn't return anything
 

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    <p>I'm here with another question. I post you the code from my AsyncTask function to get values from a JSONObject (webservice). My problem is that I have a List and I fill this list with the data from the json in the onSuccess method, but later, in the onPostExecute method of the AsyncTask, "result" is null.</p> <pre><code>private class getCategories extends AsyncTask&lt;String, Void, List&lt;Category&gt;&gt; { private int num_cat_subcat; // category count @Override protected List&lt;Category&gt; doInBackground(String... arg0) { AsyncHttpClient client = new AsyncHttpClient(); client.get(arg0[0], null, new JsonHttpResponseHandler() { public void onSuccess(JSONObject data) { try { JSONObject response = data.getJSONObject("response"); JSONArray categories = response .getJSONArray("categories"); // elements count num_cat_subcat = categories.length(); for (int i = 0; i &lt; categories.length(); i++) { JSONObject item = (JSONObject) categories .getJSONObject(i); if (item.getString("id").equalsIgnoreCase( "4d4b7105d754a06376d81259")) { JSONArray subcategories = item .getJSONArray("categories"); // Category --&gt; id, name, pluralName, shortName, // icon_prefix, icon_suffix, primary, parentId Category newItem = new Category(item .getString("id"), item .getString("name"), item .getString("pluralName"), item .getString("shortName"), null, null, null); listCategories.add(newItem); newItem = null; if (subcategories.length() &gt; 0) { // Si tiene subcategorias las contamos. num_cat_subcat += subcategories.length(); for (int j = 0; j &lt; subcategories.length(); j++) { JSONObject subitem = (JSONObject) subcategories .getJSONObject(j); Category newSubItem = new Category( subitem.getString("id"), subitem.getString("name"), subitem.getString("pluralName"), subitem.getString("shortName"), null, null, item .getString("id")); listCategories.add(newSubItem); newSubItem = null; } } } } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void onFailure(Throwable arg0) { } }); return listCategories; } @Override protected void onPostExecute(List&lt;Category&gt; result) { Log.i("result", result.toString()); for (int k = 0; k &lt; result.size(); k++) { ALLOFTHEM += result.get(k).getId(); if (k &lt; result.size() - 1) { ALLOFTHEM += ","; } } } } </code></pre>
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    1. USVíctor Martín
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      1. POAsyncTask and JSON, onSuccess doesn't return anything
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      1. VTUpMod
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    1. COdo you see the data you want on ur `ListView`.DOes your debug monitor take you inside `onPostExecute`
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      1. USNezam
    2. COis there any exception printed?
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      1. USNiko Adrianus Yuwono
    3. COi think u should put some Log msgs to check at what point your code is working.
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      1. USNaserShaikh
 

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