private void processJson(JSONObject object) {

    try {
        JSONArray rows = object.getJSONArray("rows");

        for (int r = 0; r < rows.length(); ++r) {
            JSONObject row = rows.getJSONObject(r);
            JSONArray columns = row.getJSONArray("c");

            String vendor = columns.getJSONObject(0).getString("v");
            String heading = columns.getJSONObject(1).getString("v");
            String category = columns.getJSONObject(2).getString("v");

            Offers offers1 = new Offers(vendor, heading, category);
            offerArrayList.add(offers1);
        }

        final OffersAdapter adapter = new OffersAdapter(this, R.layout.offers, offerArrayList);
        listview.setAdapter(adapter);

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