ArrayList<Map> groupss = null;
        Map<String, String> children;
        children = new HashMap<String, String>();
        children.put("xxx", "ttttt");
        groupss.add(children);

protected Void doInBackground(String... sUrl) {
            JSONParser jParser = new JSONParser(getApplicationContext());
            JSONObject json = jParser.getJSONFromUrl(URL);
            try {
                groups = new ArrayList<Map>();
                for (int i = 0; i < json.length(); i++) {
                    Map<String, String> children = new HashMap<String, String>();
                    JSONObject j1 = json.getJSONObject(TAGS[i]);
.....
                    children.put(TAG_ASK, j1.getString(TAG_ASK));
                    groups.add(children);
                }
            } catch (JSONException e) {
                Toast.makeText(context, "JSONException", Toast.LENGTH_LONG).show();
            }
            return null;
        }