Android : How to add data to BaseAdapter from doInBackground() in onPostExecute()?

I have an AsyncTask where I'm getting a bunch of data through HTTP from an endpoint using the doInBackground method. I'm trying to pass that data into a CustomAdapter that extends BaseAdapter in the onPostExecute() method. But the data is not getting updated. Any idea what I might be doing wrong here?

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {


            View rootView = inflater.inflate(R.layout.fragment_main, container, false);

            ListView listView = (ListView) rootView.findViewById(R.id.listview_activity);

            EventsAdapter eventsAdapter = new EventsAdapter(getActivity(), objects);
            objects.add(new EventsObject("M2arius", "Shaorma2"));

            listView.setAdapter(eventsAdapter);

            return rootView;
        }

public class FetchEmailActivityTask extends AsyncTask<String, Void, String[]> {

    private final String LOG_TAG = FetchEmailActivityTask.class.getSimpleName();
    private final ProgressDialog dialog = new ProgressDialog(getActivity());

    @Override
    protected void onPreExecute() {
        dialog.setMessage("Please Wait.");
        dialog.setCancelable(true);
        dialog.show();
    }

    @Override
    protected String[] doInBackground(String... params) {

        ...
    try {
        return getActivityDataFromJson(activityJsonStr, limitParams);
    } catch (JSONException e){
        Log.e(LOG_TAG, e.getMessage(), e);
        e.printStackTrace();
    }
    // This will only happen if there was an error getting or parsing the activity.
    return null;
    }

    @Override
    protected void onPostExecute(String[] result){
       super.onPostExecute(result);
       ArrayList<EventsObject> eventsList = new ArrayList<EventsObject>();
        if (dialog.isShowing())
        {
            dialog.dismiss();
        }

        if (result != null){
            objects.add(new EventsObject("Marius", "Shaorma"));
            eventsAdapter = new EventsAdapter(getActivity(), objects);
            if (objects != null) {
                eventsAdapter.notifyDataSetChanged();
            } else {
                Log.v(LOG_TAG, "Objects: " + objects);
            }
        // New data is back from the server.  Hooray!
        }
   }
}