Unable to create call adapter for io.reactivex.Observable

Question

I\'m going to send a simple get method to my server(it is Rails app) and get the result using RxJava and Retrofit. The thing that I did is:

My interface:

Answer 1

The problem is with the library being used.

I have replaced

implementation 'com.squareup.retrofit2:adapter-rxjava:2.4.0'

with

implementation 'com.squareup.retrofit2:adapter-rxjava2:2.4.0'

and used

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