Retrofit: Caused by: java.lang.IllegalArgumentException: Could not locate call adapter for io.reactivex.Observable

[raghunandankavi2010]

My application was not building due to duplicates files in .apk as mentioned here

https://github.com/ReactiveX/RxJava/issues/4445

So adding this

 packagingOptions {
    exclude 'META-INF/rxjava.properties'
}

did not cause the problem again., but a new issue cropped up

 Caused by: java.lang.IllegalArgumentException: Could not locate calladapter for 
io.reactivex.Observable<myModelclass>.
                                Tried:
                                 * retrofit2.adapter.rxjava.RxJavaCallAdapterFactory
                                 * retrofit2.ExecutorCallAdapterFactory
                                ....

I do have

@Headers({"Content-Type: application/json;charset=UTF-8"})
@GET(Constants.FETCH_FEED)
Observable<FeedResponse> fetch_Feed();

And then

  Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(Constants.BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
            .build();
   Observable<myModelclass> response = retrofit.create(Api.class).fetch_Feed();

My build.gradle file

 compile 'com.squareup.okhttp3:okhttp:3.4.1'
 compile 'com.squareup.retrofit2:retrofit:2.1.0'
 compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC3'
 compile 'io.reactivex.rxjava2:rxandroid:2.0.0-RC1'
 compile 'com.squareup.retrofit2:converter-gson:2.1.0'
 compile 'com.squareup.retrofit2:adapter-rxjava:2.1.0'

This could be related to RxJava2. This is not reproducible with version1. In which case issue should be opened in RxJava and this issue closed.

[JakeWharton]

You need to use https://github.com/JakeWharton/retrofit2-rxjava2-adapter
for RxJava 2 not the built in adapter which only handles RxJava 1.

On Sun, Sep 25, 2016, 9:24 AM Raghunandan Kavi [email protected]
wrote:

My application was not building due to duplicates files in .apk as
mentioned here

ReactiveX/RxJava#4445 https://github.com/ReactiveX/RxJava/issues/4445

So adding this

packagingOptions {
exclude 'META-INF/rxjava.properties'
}

did not cause the problem again., but a new issue cropped up

Caused by: java.lang.IllegalArgumentException: Could not locate calladapter for
io.reactivex.Observable.
Tried:
* retrofit2.adapter.rxjava.RxJavaCallAdapterFactory
* retrofit2.ExecutorCallAdapterFactory
....

I do have

Retrofit retrofit = new Retrofit.Builder()
.baseUrl(Constants.BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.build();
Observable response = retrofit.create(Api.class).fetch_Feed();

My build.gradle file

compile 'com.squareup.okhttp3:okhttp:3.4.1'
compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC3'
compile 'io.reactivex.rxjava2:rxandroid:2.0.0-RC1'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
compile 'com.squareup.retrofit2:adapter-rxjava:2.1.0'

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[raghunandankavi2010]

Thank you. I missed that.

[longnguyencse]

Thanks you

[KDisEDDY]

kiang kiang kiang

[effectivecui]

New Solution：

https://github.com/square/retrofit/tree/master/retrofit-adapters/rxjava2

[yancechen]

Thanks you

[fuchangle]

thanks