Adding header to all request with Retrofit 2

Question

Retrofit 2\'s documentation says:

Headers that need to be added to every request can be specified using an OkHttp interceptor.

I

Answer 1

In my case addInterceptor()didn't work to add HTTP headers to my request, I had to use addNetworkInterceptor(). Code is as follows:

OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
httpClient.addNetworkInterceptor(new AddHeaderInterceptor());

And the interceptor code:

public class AddHeaderInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {

        Request.Builder builder = chain.request().newBuilder();
        builder.addHeader("Authorization", "MyauthHeaderContent");

        return chain.proceed(builder.build());
    }
}

This and more examples on this gist