Async UI implementation

[sciage]

Currently I have successfully implemented MVP architecture in my android app but When I am loading data inside my fragment, the UI hangs till the loading finishes. When Loading finishes, and data is loaded inside fragment, then only I can interact with click on different buttons.

This is my network api call

public Single<List<PostsModel>> getFacebookFriendsFeed(String id_user_name, String user_id, String facebookId, String page) { return Rx2AndroidNetworking.get(ApiEndPoint.GET_POST_DATA) // .addHeaders(mApiHeader.getProtectedApiHeader()) .addQueryParameter("id_user_name", id_user_name) .addQueryParameter("user_id", user_id) .addQueryParameter("facebookId", facebookId) .addQueryParameter("page", page) .build() .getObjectListSingle(PostsModel.class) .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()); }

This is my presenter implementation of the API

`@Override
public void getFacebookPostsOnline(String id_user_name, String user_id, String facebookId, String page) {

  //  getMvpView().showLoading();

    getCompositeDisposable().add(getDataManager()
            .getFacebookFriendsFeed(id_user_name, user_id, facebookId, page)
            .subscribeOn(getSchedulerProvider().io())
            .observeOn(getSchedulerProvider().ui())
            .subscribe(new Consumer<List<PostsModel>>() {
                @Override
                public void accept(List<PostsModel> response) throws Exception {

                    getMvpView().getFacebookPosts(response);
                    // todo add data and loop to get all friends list
               /*     getDataManager().updateUserInfo(

                            response.info.getId(),
                            response.info.getUser_token(),
                            DataManager.LoggedInMode.LOGGED_IN_MODE_SERVER
                    );
                    */


                    if (!isViewAttached()) {
                        return;
                    }

                 //   getMvpView().hideLoading();
                  //  getMvpView().openMainActivity();

                }
            }, new Consumer<Throwable>() {
                @Override
                public void accept(Throwable throwable) throws Exception {

                    if (!isViewAttached()) {
                        return;
                    }

                    getMvpView().hideLoading();

                    // handle the login error here
                    if (throwable instanceof ANError) {
                        ANError anError = (ANError) throwable;
                        handleApiError(anError);
                    }
                }
            }));
}`

Please let me know where I am going wrong in making the UI more async. and do you need any more details about my code.