Question

If I want to have an ExpandableListView, which gets data from a response from server(JSON array) for its groups and their children.
How can I do it?
I know that there is SimpleCursorTreeAdapter, but it used only for cursor and I used it before, but I need any equivalent for this adapter to use it with JSON arrays

This is the function to get the groupItems

        protected void BindOrederItemList(final int order_id) 
    {
        // TODO Auto-generated method stub
        //select all categories from order items where order_id =??
        //select items where category=??
        String Url="http://192.168.3.113/mywebservices.php?op=GetOrderCategory&lang_id=1&order_id="+order_id;
        GetNetworkData.OnPostExecuteListener listener=new GetNetworkData.OnPostExecuteListener() 
        {

            @Override
            public void onPostExecute(String result) {
                // TODO Auto-generated method stub
                if (result!=null)
                {
                    try
                    {

                 JSONArray jArray = new JSONArray(result);
                 HashMap<String, String> Catmap = new HashMap<String, String>();
               //  ArrayList<Integer> category=new ArrayList<Integer>();
                 for (int i = 0; i < jArray.length(); i++) 

                    {

                        JSONObject e = jArray.getJSONObject(i);
                            id=e.getInt("order_id");

                         cat_name=e.getString("cat_name");
                          cat_id=e.getInt("cat_id");
                          Catmap.put("cat_id",String.valueOf(cat_id));
                          Catmap.put("cat_name", cat_name);
                          catItemsList.add(Catmap);

                    }
                Log.i("Insid For Loop", "Group size = "+catItemsList.toArray());



                      //  Log.i("Bind item", "CAT SIZE "+catItemsList.size());

                        }
                    catch(Exception e)
                    {
                        e.printStackTrace();
                    }
                }

            }

        };

        try
        {
        GetNetworkData task = new GetNetworkData(Url,null,listener);
        task.execute();
        }
        catch(Exception e)
        {

            e.printStackTrace();

        }
    }

Thanks

Answer 1

One way of doing it is using a SimpleExandableListAdapter.

In that case you will have to first fetch and then store your JSON data as a List of Maps. That you could accomplish using an AsyncTaskLoader, in which you fetch and repackage the data, and then create a new instance of your adapter in the background, which you then swap into the ExandableListView.