Retrofit 2 HTTP method annotation is required (e.g., @GET, @POST, etc.)

Question

What\'s wrong with my Retrofit configuration? I\'m having this error when I\'m adding Basic Authentication with my OkHttpClient but when I used the default client without Interc

Answer 1

As Eugen Pechanec stated the problem lies usually in conflict between retrofit and retrofit 2. In my case the error "HTTP method annotation is required @GET @POST" was caused by using wrong structure Builder of HTTPLoggingInterceptor.

Hence make sure that you are using okhttp3 with retrofit2

So the right structure looks like THIS:

import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;

...

Retrofit provideRetrofit(){

// get base url for endpoint
String endpointUrl = BuildConfig.apiEndpointUrl;

// add logging interceptor
HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
logging.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(logging).build();

// build retrofit instance
Retrofit retrofit = new Retrofit.Builder()
        .baseUrl(endpointUrl)
        .client(client)
        .addConverterFactory(GsonConverterFactory.create())
        .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
        .build();

return retrofit;
}

And the app/build.gradle

compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4'
compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4'
compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'
compile 'com.squareup.okhttp3:logging-interceptor:3.2.0'
compile 'com.squareup.okhttp3:okhttp:3.2.0'