Retrofit - Intercept responses globally

Question

I\'d like to intercept all responses received by the retrofit engine, and scan for HTTP error code, for example error 403.

I\'m aware I can use the failure(RetrofitE

Answer 1

OkHttpClient okHttpClient = new OkHttpClient.Builder()  
    .addInterceptor(new Interceptor() {
        @Override
        public okhttp3.Response intercept(Chain chain) throws IOException {
            Request request = chain.request();
            okhttp3.Response response = chain.proceed(request);

            // todo deal with the issues the way you need to
            if (response.code() == 500) {
                startActivity(
                        new Intent(
                                ErrorHandlingActivity.this,
                                ServerIsBrokenActivity.class
                        )
                );

                return response;
            }

            return response;
        }
    })
    .build();

Retrofit.Builder builder = new Retrofit.Builder()  
        .baseUrl("http://your_url")
        .client(okHttpClient)
        .addConverterFactory(GsonConverterFactory.create());

Retrofit retrofit = builder.build(); 

As you can see in the snippet above, the okhttp3.Response response = chain.proceed(request); line accesses the server response. Consequently, we can check the status code with if (response.code() == 500) and then open the ServerIsBrokenActivity.