IllegalArgumentException：无法找到 rx.Observable RxJava、Retrofit2 的调用适配器

Question

我在调用其余 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);

}

MainActivity 内部

      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

请务必将 implementation 'com.squareup.retrofit2:adapter-rxjava2:2.4.0' 或您正在使用的任何版本添加到您的依赖项中，然后使用该转换器配置改造：

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

已更新

RxJavaCallAdapterFactory 已重命名为 RxJava2CallAdapterFactory。更改了上面的片段。

Answer 2

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

.addCallAdapterFactory(RxJava2CallAdapterFactory.create())

有关用法的更多信息https://github.com/JakeWharton/retrofit2-rxjava2-adapter

Answer 3

来自上述 Github 项目页面：

Blockquote This is now DEPRECATED! Retrofit 2.2 and newer have a first-party call adapter for RxJava 2: https://github.com/square/retrofit/tree/master/retrofit-adapters/rxjava2

现在您只需要在 app/build.gradle 文件中包含：

compile 'com.squareup.retrofit2:adapter-rxjava2:latest.version'

Answer 4

就我而言，足以替换

.addCallAdapterFactory(RxJavaCallAdapterFactory.create())

和

.addCallAdapterFactory(RxJava2CallAdapterFactory.create())

Answer 5

你应该使用最新版本的所有 Rx 依赖项，这里我使用的是 2 版本（比如 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'

再补充一件事：

addCallAdapterFactory(RxJava2CallAdapterFactory.create())

在 Retrofit Api 客户端中喜欢 :

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

IllegalArgumentException：无法找到 rx.Observable RxJava、Retrofit2 的调用适配器

IllegalArgumentException: Could not locate call adapter for rx.Observable RxJava, Retrofit2

android

rx-java

retrofit2

ServiceFactory.java

MovieService.java

MainActivity 内部