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我在看一个用 MVP 编码的 android 应用程序的例子(链接在这里)。但现在我想将教程中给定的 RxJava1 代码重新编码为 RxJava2 代码。但是,我遇到了麻烦,尤其unSubscribe()isUnSubscribed(). 我试图转换它,我会分享我的尝试。

RxJava1 代码:

  public void doLogin(AuthCredentials credentials) {
    cancelSubscription();
    subscriber = new Subscriber<Account>() {
      @Override public void onCompleted() {
        if (isViewAttached()) {
          getView().loginSuccessful();
        }
      }

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

      @Override public void onNext(Account account) {
        eventBus.post(new LoginSuccessfulEvent(account));
      }
    };

    // do login
    accountManager.doLogin(credentials)
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(subscriber);
  }
  private void cancelSubscription() {
    if (subscriber != null && !subscriber.isUnsubscribed()) {
      subscriber.unsubscribe();
    }
  }

这是我对 RxJava2 代码的尝试:

  public void doLogin(AuthCredentials credentials) {
    cancelSubscription();
    subscriber = new Subscriber<Account>() {

      @Override public void onSubscribe(Subscription s) {
        // do login
        accountManager.doLogin(credentials)
                      .subscribeOn(Schedulers.io())
                      .observeOn(AndroidSchedulers.mainThread())
                      .subscribe(subscriber);
      }

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

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

      @Override public void onNext(Account account) {
        eventBus.post(new LoginSuccessfulEvent(account));
      }
    };
  }


  private void cancelSubscription() {   
    //isUnsubscribed and unsubscribe doesnt work anymore
  }

我对 RxJava 的概念相当陌生。如果有人能指出我的错误并指导我,那就太好了。:)

4

1 回答 1

2

我为迟到的答案道歉。一直特别忙。正如@akarnokd 所说,与 RxJava1 相比,RxJava2 发生了很多变化。有兴趣的可以看看这个视频

就上述问题而言,我们可以通过使用DisposableObservables

这是上述问题的答案。我已经对其进行了测试,并且可以正常工作。

public void doLogin(AuthCredentials credentials) {
     myDisposableObserver = new DisposableObserver<Account>() {
                @Override
                public void onNext(Account account) {
                    eventBus.post(new LoginSuccessfulEvent(account));
                }

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

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

            // do login
            accountManager.doLogin(credentials)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(subscriber);
        }
    }

    private void cancelSubscriptionToMyPrescriptorManager() {
        if (myDisposableObserver != null && !myDisposableObserver.isDisposed()) {
            myDisposableObserver.dispose();
        }
    }   
于 2017-01-28T10:27:07.397 回答