android - 从 RxJava1 迁移到 RxJava2

Question

我正在查看用 MVP 编码的 Android 应用程序示例 ( link here )。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，尤其是 unSubscribe() 和 isUn​​Subscribed()。我尝试对其进行转换，我将分享我的尝试。

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。 :)

Answer 1

对于迟到的答复，我深表歉意。一直非常忙碌。正如 @akarnokd 所说，与 RxJava1 相比，RxJava2 进行了很多更改。有兴趣的请看这个video .

就上述问题而言，我们可以使用DisposableObservables来实现同样的效果

以上问题的答案如下。我已经测试过了，它有效。

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();
        }
    }