莫斯比& EventBus

时间:2016-11-16 15:20:18

标签: android greenrobot-eventbus mosby

我正在尝试使用Mosby和EventBus开发应用程序。我想要的第一个事件是在用户登录后创建一个粘性事件,这样每个屏幕都可以随时访问登录信息。

根据Mosby邮件样本,我有一个像这样的BasePresenter:

public abstract class EventBusPresenter<V extends MvpView> extends MvpBasePresenter<V> {


    private static final java.lang.String TAG = tag(EventBusPresenter.class);
    @Inject
    protected EventBus mEventBus;


    LoginSuccessfulEvent userInfo;

    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
    public void onLoginSuccessful(LoginSuccessfulEvent event) {
        MCLog.i(TAG, "Received a login event!");
        userInfo = event;
        onLoginReceived(event);
    }

    protected abstract void onLoginReceived(LoginSuccessfulEvent e);

    public LoginSuccessfulEvent getUserInfo(){
        return userInfo;
    }


    @Override
    public void attachView(V view) {
        super.attachView(view);
        mEventBus.register(this);

    }

    @Override
    public void detachView(boolean retainInstance) {
        super.detachView(retainInstance);
        mEventBus.unregister(this);
    }
}

当用户登录时,我使用以下代码:

public void doLogin(String username, String password) {
    if (isViewAttached()) {
        getView().showLoading();
    }

    cancelSubscription();
    mSubscriber = new Subscriber<AuthenticationResponse>() {

        @Override
        public void onCompleted() {
            if (isViewAttached()) {
                getView().loginSuccessful();
            }
        }

        @Override
        public void onError(Throwable e) {
            if (isViewAttached()) {
                getView().showLoginError();
            }
        }

        @Override
        public void onNext(AuthenticationResponse authenticationResponse) {
            User user = authenticationResponse.getUser();
            MCLog.w(TAG, String.format("Login was successful with user: %s", user) );
            mEventBus.postSticky(new LoginSuccessfulEvent(user, authenticationResponse.getToken()));
            String token = authenticationResponse.getToken();
            MCLog.i(TAG, String.format("Token obtained = %s", token));
            mSharedPreferences.edit().putString(PreferenceKeys.TOKEN_KEY, token).apply();


        }
    };

我的想法是,对于每个屏幕,只要加载它就可以通过EventBus订阅检索UserInfo。

问题是 - 这个事件太儿子了。根据mosby自己的BaseFragment类,我这样做:

public abstract class BaseFragment<V extends MvpView, P extends MvpPresenter<V>> extends MvpFragment<V, P> {

    private Unbinder mUnbinder;

    @LayoutRes
    protected abstract int getLayoutRes();

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        return inflater.inflate(getLayoutRes(), container, false);
    }


    @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        inject();
        super.onViewCreated(view, savedInstanceState);
        mUnbinder = ButterKnife.bind(this, view);
    }

    @Override public void onDestroyView() {
        super.onDestroyView();
        mUnbinder.unbind();
    }

    /**
     * Inject dependencies
     */
    protected void inject() {

    }


}

这意味着注入在创建视图之前到达,因此每当我尝试响应正在接收的LoginEvent时,需要更新的UI元素就不再存在。

我怎样才能做到这一点?这甚至是正确的方法吗?

1 个答案:

答案 0 :(得分:0)

mUnbinder = ButterKnife.bind(this, view);onCreateView()onViewCreated()mUnbinder = ButterKnife.bind(this, view);来电super.onViewCreated()之前做UserMananger,然后再致电UserManager

顺便说一下。使用EventBus听起来很痛苦。为什么不简单地使用像$strToRemove= array("www","http","blabla"); $newStr = str_replace($strToRemove, "", $_POST['billing_myfield12']); 这样的类来获取当前经过身份验证的用户,如果用户未经过身份验证则为null。此外,由于您使用的是RxJava,因此在每个屏幕上将str_replace包含在RxJava链/流中是有意义的。