OnClick

Question

我试图深入了解RxJava2世界的奇迹，但我仍然很困惑。 基本上我必须在用户点击按钮时调用API，因此我使用Retrofit2客户端返回一个Observable，我订阅了按钮的on click方法。

问题是，当点击按钮两次时，我会得到：

io.reactivex.exceptions.ProtocolViolationException: It is not allowed to subscribe with a(n) <package>.MainActivity$1 multiple times. Please create a fresh instance of <package>.MainActivity$1 and subscribe that to the target source instead.

如果我在onComplete之后处理观察者，则因为订阅失效而无法调用api ..我是否遗漏/误解了某些内容？

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.button) Button button;

    private DisposableObserver<PopularGames[]> observer;
    private Observable<PopularGames[]> popularGamesObservable;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);

        APIsInterface apiClient = MyApplication.getInstance(this).getApiClient();
        popularGamesObservable = apiClient.getPopularGames();

        observer = new DisposableObserver<PopularGames[]>() {

            @Override
            public void onNext(PopularGames[] result) {
                Timber.d("onNext " + Arrays.asList(result));
            }

            @Override
            public void onError(Throwable e) {
                Timber.e("onError " + e);
            }

            @Override
            public void onComplete() {
                Timber.d("onComplete");
            }
        };


    }


    @OnClick(R.id.button)
    public void onViewClicked() {
        popularGamesObservable.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeWith(observer);
    }
}

Answer 1

预计

io.reactivex.exceptions.ProtocolViolationException

你能做什么

CompositeDisposable compositeDisposable = new CompositeDisposable();

然后

@OnClick(R.id.button)
public void onViewClicked() {
   compositeDisposable.add( popularGamesObservable.subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribeWith(new DisposableObserver<PopularGames[]>() {

        @Override
        public void onNext(PopularGames[] result) {
            Timber.d("onNext " + Arrays.asList(result));
        }

        @Override
        public void onError(Throwable e) {
            Timber.e("onError " + e);
        }

        @Override
        public void onComplete() {
            Timber.d("onComplete");
        }
    }));
}

然后在onDestory

compositeDisposable.dispose();