Il tipo di ritorno osservabile deve essere parametrizzato come Osservabile <Foo> o Osservabile <? estende Foo>

Question

Uso il retrofit 2.0.0-beta2 e il debug build funziona correttamente, ma sto riscontrando il seguente errore nella versione di rilascio con Proguard.

Ecco gli errori di logcat aggiornati.

11-17 18:23:22.751 16274-16274/ph.reggis.FEDT D/AndroidRuntime: Shutting down VM 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime: FATAL EXCEPTION: main 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime: Process: ph.reggis.FEDT, PID: 16274 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime: java.lang.RuntimeException: Unable to resume activity {ph.reggis.FEDT/ph.reggis.FEDT.view.activity.NotificationListActivity}: java.lang.IllegalArgumentException: Unable to create call adapter for class b.a 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  for method InsularFMService.getNews 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3103) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3134) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2481) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.app.ActivityThread.-wrap11(ActivityThread.java) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:102) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.os.Looper.loop(Looper.java:148) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.app.ActivityThread.main(ActivityThread.java:5417) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at java.lang.reflect.Method.invoke(Native Method) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime: Caused by: java.lang.IllegalArgumentException: Unable to create call adapter for class b.a 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  for method InsularFMService.getNews 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at retrofit.Utils.methodError(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at retrofit.MethodHandler.createCallAdapter(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at retrofit.MethodHandler.create(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at retrofit.Retrofit.loadMethodHandler(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at retrofit.Retrofit$1.invoke(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at java.lang.reflect.Proxy.invoke(Proxy.java:393) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at $Proxy0.getNews(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at ph.reggis.FEDT.b.C.d(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at ph.reggis.FEDT.view.fragment.NotificationListFragment.t(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at ph.reggis.FEDT.view.fragment.NotificationListFragment.l(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.support.v4.b.B.a(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.support.v4.b.B.a(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.support.v4.b.B.a(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.support.v4.b.B.i(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.support.v4.b.y.i(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.support.v4.b.t.onPostResume(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.support.v7.a.B.onPostResume(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.app.Activity.performResume(Activity.java:6336) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3092) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime: Caused by: java.lang.IllegalStateException: Observable return type must be parameterized as Observable<Foo> or Observable<? extends Foo> 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at retrofit.RxJavaCallAdapterFactory.get(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at retrofit.Retrofit.nextCallAdapter(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:  at retrofit.Retrofit.callAdapter(Unknown Source) 
11-17 18:23:22.752 16274-16274/ph.reggis.FEDT E/AndroidRuntime:   ... 28 more 

Interfaccia:

@GET("news") 
Observable<News> getNews(); 

Frammento:

Retrofit retrofit = new Retrofit.Builder() 
     .baseUrl(Constant.WS_URL_BASE) 
     .addConverterFactory(GsonConverterFactory.create()) 
     .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) 
     .build(); 

InsularFMService fmService = retrofit.create(InsularFMService.class); 

//Observable<News> observable = fmService.getNews(); 
//subscription = observable. - ALSO NOT WORKING 

subscription = fmService.getNews(). 
     .observeOn(AndroidSchedulers.mainThread()) 
     .subscribeOn(appController.getDefaultScheduler()) 
     .subscribe(new Subscriber<News>() {... 

Graddle:

compile "com.squareup.retrofit:retrofit:2.0.0-beta2" 
compile "com.squareup.retrofit:converter-gson:2.0.0-beta2" 
compile "com.squareup.retrofit:adapter-rxjava:2.0.0-beta2" 

Proguard:

# Fixed: Caused by: java.lang.NoSuchFieldException: No field producerIndex 
-keepclassmembers class rx.internal.util.unsafe.*ArrayQueue*Field* { 
    long producerIndex; 
    long consumerIndex; 
} 
-keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueProducerNodeRef { 
    long producerNode; 
    long consumerNode; 
} 

Answer 1

Ora funziona inserendo questi attributi all'interno di Proguard.

# Application classes that will be serialized/deserialized over Gson 
-keep class ph.reggis.FEDT.model.api.** { *; } 

Ecco le impostazioni pieni

##---------------Begin: proguard configuration for Gson ---------- 
# Gson uses generic type information stored in a class file when working with fields. Proguard 
# removes such information by default, so configure it to keep all of it. 
-keepattributes Signature 
-keepattributes *Annotation* 

# Gson specific classes 
-keep class sun.misc.Unsafe { *; } 

# Application classes that will be serialized/deserialized over Gson 
-keep class ph.reggis.FEDT.model.api.** { *; } 

##---------------End: proguard configuration for Gson ----------