Show resulting data hereNow Pubnub in recycleView android

I am calling this method when I start Activity. I want it to show up in RecycleView this code of mine and give me an exception

public class FirstFragment extends fragment {

//private
String[] username = {"joe", "mido", "star", "fawzy", "mohsen"};
private RecyclerView recyclerView;
TextView textView;
ProgressDialog dialog;
FirstpageAdapter adapter;
View layout;
private final Handler myHandler = new Handler();
List<String> ids = new ArrayList<>();
private final static String TAG = "FIRST_FRAGMENT";
ListView listView;
Runnable updateRunnable;

public FirstFragment() {
    // Required empty public constructor
}

public List<String> getData() {
    List<String> data = new ArrayList<>();
    for (int i = 0; i < username.length; i++) {
        data.add(username[i]);
    }
    return data;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    //new MyTask().execute();
    View layout = inflater.inflate(R.layout.fragment_first, container, false);
    recyclerView=(RecyclerView)layout.findViewById(R.id.firstList);
    recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    PubNubService.herNow(new Callback() {
        public void successCallback(String channel, Object message) {
            try {
                JSONObject object = new JSONObject(message.toString());
                JSONArray jsonArray = object.getJSONArray("uuids");
                for (int i = 0; i < jsonArray.length(); i++) {
                    ids.add(jsonArray.getString(i));
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            Log.e(TAG, ids.size() + "");
            Log.e(TAG, message.toString());

                    adapter = new FirstpageAdapter(getActivity(), ids);
            recyclerView.setAdapter(adapter);

        }

        @Override
        public void errorCallback(String s, PubnubError pubnubError) {
            Log.e(TAG, "error Callback" + pubnubError.getErrorString());
        }
    });

    return layout;
}

      

        
        
        
      

    

}

An exception

08-01 14: 16: 06.903 12365-12490 / com.sprintone E / AndroidRuntime: FATAL EXCEPTION: Non-Subscribe-Manager-1384510668-5 Process: com.sprintone, PID: 12365 android.view.ViewRootImpl $ CalledFromWrongThreadException: original only the thread that created the view hierarchy can touch its views. at android.view.ViewRootImpl.checkThread (ViewRootImpl.java:6024) on android.view.ViewRootImpl.requestLayout (ViewRootImpl.java:820) on android.view.View.requestLayout (View.java:16431) on android.view. View.requestLayout (View.java:16431) on android.view.View.requestLayout (View.java:16431) on android.view.View.requestLayout (View.java:16431) on android.view.View.requestLayout (View .java: 16431) at android.view.View.requestLayout (View.java:16431) at android.support.v4.widget.DrawerLayout.requestLayout (DrawerLayout.java:979) on android.view.View.requestLayout (View.java:16431) on android.view.View.requestLayout (View.java:16431) on android.view.View .requestLayout (View.java:16431) on android.view.View.requestLayout (View.java:16431) on android.support.v7.widget.RecyclerView.requestLayout (RecyclerView.java:2245) on android.support.v7 .widget.RecyclerView.setAdapter (RecyclerView.java:564) at com.sprintone.userInterface.Fragment.FirstFragment $ 1.successCallback (FirstFragment.java:101) at com.pubnub.api.PubnubCore.invokeCallback (Unknown Source) pubnub.api.PubnubCore.invokeCallback (Unknown source) at com.pubnub.api.PubnubCore $ 11.handleResponse (Unknown source) at com.pubnub.api.NonSubscribeWorker.process (Unknown Source) at com.pubnub.api.Worker.run (Unknown Source) at java.lang.Thread.run (Thread.java:841)