ApiModule

@Module
public class ApiModule {

    @Provides
    @Singleton
    Retrofit provideRetrofit(OkHttpClient okHttpClient) {
        return new Retrofit.Builder()
                .baseUrl(BASE_URL)
                .client(okHttpClient)
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }

    @Provides
    @Singleton
    OkHttpClient provideHttpClient(Context context) {
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        OkHttpClient.Builder builder = new OkHttpClient.Builder()
                .addInterceptor(interceptor)
                .addInterceptor(chain -> {
                    if (!Utils.isOnline(context)) {
                        throw new NoInternetException();
                    }
                    return chain.proceed(chain.request());
                });
        return builder.build();
    }

    @Provides
    @Singleton
    FitAPI provideApi(Retrofit retrofit) {
        return retrofit.create(FitAPI.class);
    }

    @Provides
    @Singleton
    public ApiController provideApiController(FitAPI fitAPI) {
        return new ApiController(fitAPI);
    }
}