如何通过RxAndroid和Retrofit 2检索响应体?

我正在使用Retrofit 2(testing版4),我正在寻求从使用标准的Call响应到RxAndroid Observable响应。 我通过从Call<List<ExampleObject>>Observable<List<ExampleObject>>的简单交换成功地切换了我的大部分调用。 我的一些电话使用Call<okhttp3.ResponseBody> ,这很好,但是当我换出Call ,遇到了一个错误:

 03-03 15:21:44.237 27333-27333/com.example.app E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.app, PID: 27333 java.lang.IllegalArgumentException: Unable to create call adapter for rx.Observable<okhttp3.ResponseBody> for method AuthenticationService.getLoginForm at retrofit2.Utils.methodError(Utils.java:119) at retrofit2.MethodHandler.createCallAdapter(MethodHandler.java:52) at retrofit2.MethodHandler.create(MethodHandler.java:25) at retrofit2.Retrofit.loadMethodHandler(Retrofit.java:164) at retrofit2.Retrofit$1.invoke(Retrofit.java:145) at java.lang.reflect.Proxy.invoke(Proxy.java:393) at $Proxy6.getLoginForm(Unknown Source) at com.example.app.ui.fragment.LoginFragment.login(LoginFragment.java:214) at com.example.app.ui.fragment.LoginFragment.lambda$onContinue$1(LoginFragment.java:168) at com.example.app.ui.fragment.LoginFragment.access$lambda$1(LoginFragment.java) at com.example.app.ui.fragment.LoginFragment$$Lambda$4.onClick(Unknown Source) at android.view.View.performClick(View.java:5204) at android.view.View$PerformClick.run(View.java:21153) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.IllegalArgumentException: Could not locate call adapter for rx.Observable<okhttp3.ResponseBody>. Tried: * retrofit2.ExecutorCallAdapterFactory at retrofit2.Retrofit.nextCallAdapter(Retrofit.java:230) at retrofit2.Retrofit.callAdapter(Retrofit.java:194) at retrofit2.MethodHandler.createCallAdapter(MethodHandler.java:50) ... 18 more 

我之所以使用ResponseBody而不是其他对象,是因为在这种情况下,我需要parsingHTML,据我所知,HTMLparsing器没有Retrofit转换器。 我知道我可能可以自己创build一个,但我宁愿不要less量的HTMLparsing。

我的问题是为什么Retrofit 2 RxJava Adapter在Retrofit 2本身没有支持ResponseBody时候? 有没有另一种方式我可以从Observable获取响应string?


我的服务:

 public interface AuthenticationService() { @GET("cas/login") Observable<Response<ResponseBody>> login(); } 

相关改造代码:

 public static Retrofit getRetrofit() { if(mRetrofit == null) { return new Retrofit.Builder() .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create(getGson())) .client(getOkHttpClient()) .build(); } return mRetrofit; } public static AuthenticationService getAuthenticationService() { return getRetrofit().create(AuthenticationService.class); } 

响应尝试:

 private void login() { RestClient.getAuthenticationService().login() .observeOn(ASchedulers.newThread()) .subscribeOn(AndroidSchedulers.mainThread()) .doOnNext(this::onLoginResponse); } private void onLoginResponse(Response<ResponseBody>> response) { try { parseResponse(response.body().string()); } catch (IOException) { Timber.w(throwable, "Failed to login"); } } 

新的堆栈跟踪:

 03-03 16:14:57.848 26866-26866/com.example.app E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.app, PID: 26866 java.lang.IllegalArgumentException: Unable to create call adapter for rx.Observable<retrofit2.Response<okhttp3.ResponseBody>> for method AuthenticationService.getLoginForm at retrofit2.Utils.methodError(Utils.java:119) at retrofit2.MethodHandler.createCallAdapter(MethodHandler.java:52) at retrofit2.MethodHandler.create(MethodHandler.java:25) at retrofit2.Retrofit.loadMethodHandler(Retrofit.java:164) at retrofit2.Retrofit$1.invoke(Retrofit.java:145) at java.lang.reflect.Proxy.invoke(Proxy.java:393) at $Proxy3.getLoginForm(Unknown Source) at com.example.app.ui.fragment.LoginFragment.login(LoginFragment.java:206) at com.example.app.ui.fragment.LoginFragment.lambda$onContinue$1(LoginFragment.java:160) at com.example.app.ui.fragment.LoginFragment.access$lambda$1(LoginFragment.java) at com.example.app.ui.fragment.LoginFragment$$Lambda$4.onClick(Unknown Source) at android.view.View.performClick(View.java:5204) at android.view.View$PerformClick.run(View.java:21153) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.IllegalArgumentException: Could not locate call adapter for rx.Observable<retrofit2.Response<okhttp3.ResponseBody>>. Tried: * retrofit2.ExecutorCallAdapterFactory at retrofit2.Retrofit.nextCallAdapter(Retrofit.java:230) at retrofit2.Retrofit.callAdapter(Retrofit.java:194) at retrofit2.MethodHandler.createCallAdapter(MethodHandler.java:50) ... 18 more 

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