我如何使rxjava分页

Question

我正在尝试在此处的其余调用中添加分页，并且看过很多tut，但是我不知道如何在Presenter中通过此调用进行分页，因此我可以通过REST API处理页面吗？在我的Json中，我有这个：

“页面”：22， “页面”：1，

    public class NearbyUsersPresenter implements NearbyUsersPresenterInterface {

    NearbyUsersViewInterface mvi;
    private String TAG = "NearbyUsersPresenter";
    private SQLiteHandler db;
    private volatile int pageNumber = 1;

    public NearbyUsersPresenter(NearbyUsersViewInterface mvi) {
        this.mvi = mvi;
    }

    @Override
    public void getMessages() {
        getObservable().subscribeWith(getObserver());
    }

    public Observable<NearbyUsersList> getObservable(){
        db = new SQLiteHandler(mvi.getContext());
        HashMap<String, String> user = db.getUserDetails();
        final String apiKey = user.get("apiKey");
        return RestClient.getClient().create(REST.class)
                            .NearbyUsers(apiKey, pageNumber, 20)
                            .subscribeOn(Schedulers.io())
                            .observeOn(AndroidSchedulers.mainThread());
    }

    public DisposableObserver<NearbyUsersList> getObserver(){
        return new DisposableObserver<NearbyUsersList>() {

            @Override
            public void onNext(@NonNull NearbyUsersList nearbyUsersList) {
                mvi.displayNearbyUsers(nearbyUsersList);
            }

            @Override
            public void onError(@NonNull Throwable e) {
                Log.d(TAG,"Error"+e);
                e.printStackTrace();
                mvi.displayError("Error fetching NearbyUsers Data");
            }

            @Override
            public void onComplete() {
                Log.d(TAG,"Completed");
                mvi.hideProgressBar();
            }
        };
    }
}