IllegalArgumentException:找不到rx.Observable RxJava,Retrofit2的调用适配器

Question

我在调用其余的api时遇到上述错误.我正在使用retrofit2和RxJava.

ServiceFactory.java

public class ServiceFactory {
public static <T> T createRetrofitService(final Class<T> clazz, final String endpoint){

    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(endpoint)
            //.addConverterFactory(GsonConverterFactory.create())

            .build();

    T service = retrofit.create(clazz);
    return service;
}

}

MovieService.java

public interface MovieService{
//public final String API_KEY = "<apikey>";
public final String SERVICE_END = "https://api.mymovies.org/3/";
@GET("movie/{movieId}??api_key=xyz")
Observable<Response<Movies>> getMovies(@Field("movieId") int movieId);

}

内部MainActivity

      MovieService   tmdbService = ServiceFactory.createRetrofitService(MovieService.class, MovieService.SERVICE_END);
    Observable<Response<Movies>> responseObservable = tmdbService.getMovies(400);
    responseObservable .subscribeOn(Schedulers.newThread())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(new Subscriber<Response<Movies>>() {
                @Override
                public void onCompleted() {

                }

                @Override
                public void onError(Throwable e) {

                }

                @Override
                public void onNext(Response<Movies> moviesResponse) {

                }
            });

Answer 1

请确保将implementation 'com.squareup.retrofit2:adapter-rxjava2:2.4.0'您使用的任何版本添加到依赖项中,然后使用该转换器配置改进:

Retrofit retrofit = new Retrofit.Builder()
    .baseUrl(endpoint)
    .addConverterFactory(GsonConverterFactory.create())
    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
    .build();

更新

RxJavaCallAdapterFactory被重命名为RxJava2CallAdapterFactory.改变了上面的剪辑.

Answer 2

对于RxJava2使用 compile 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0'

.addCallAdapterFactory(RxJava2CallAdapterFactory.create())

有关使用的更多信息,请访问https://github.com/JakeWharton/retrofit2-rxjava2-adapter

Answer 3

你应该使用最新版本的所有Rx依赖,这里我使用的是版本2(如rxjava2)

implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'

implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
implementation 'io.reactivex.rxjava2:rxjava:2.1.9'
implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'

并添加一件事:

addCallAdapterFactory(RxJava2CallAdapterFactory.create())

在Retrofit Api客户端中:

retrofit = new Retrofit.Builder()
                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                    .addConverterFactory(GsonConverterFactory.create())
                    .baseUrl(BASE_URL)
                    .build();