public void login()

in app/src/main/java/org/apache/fineract/ui/online/login/LoginPresenter.java [63:115]
47 lines of code
6 McCabe index (conditional complexity)

    public void login(String username, String password) {
        checkViewAttached();
        getMvpView().showProgressDialog();
        compositeDisposable.add(dataManagerAuth.login(username, password)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeWith(new DisposableObserver<Authentication>() {
                    @Override
                    public void onNext(Authentication user) {
                        getMvpView().hideProgressDialog();
                        getMvpView().showUserLoginSuccessfully(user);
                    }

                    @Override
                    public void onError(Throwable throwable) {
                        getMvpView().hideProgressDialog();
                        if (throwable instanceof NoConnectivityException) {
                            getMvpView().showNoInternetConnection();
                        } else {

                            MifosError mifosError = new MifosError();
                            Converter<ResponseBody, MifosError> errorConverter =
                                    retrofit.responseBodyConverter(MifosError.class,
                                            new Annotation[0]);
                            if (throwable instanceof HttpException) {
                                HttpException httpException = (HttpException) throwable;
                                Response response = httpException.response();

                                if (response.errorBody() != null) {
                                    try {
                                        mifosError = errorConverter.convert(response.errorBody());
                                    } catch (IOException e) {
                                        Log.d(LOG_TAG, e.getLocalizedMessage());
                                    }
                                }

                                if (mifosError.getMessage() == null) {
                                    getMvpView().showError(
                                            context.getString(R.string.wrong_username_or_password));
                                } else {
                                    getMvpView().showError(mifosError.getMessage());
                                }
                            }
                        }
                    }

                    @Override
                    public void onComplete() {

                    }
                })
        );
    }