Retrofit Interceptor Add Authorization Token

Add customized headers via Retrofits 2.0 in our Android app. There are many tutorials about using interceptor to add headers in Retrofit. You can add authorization token and also you can write a logic for token regeneration

compile "com.squareup.retrofit2:retrofit:2.3.0"
compile "com.squareup.retrofit2:converter-gson:2.3.0"

You can easily intercept the request on the network layer provided by OkHttp

OkHttpClient.Builder httpClient = new OkHttpClient.Builder();  
httpClient.addInterceptor(new Interceptor() {  
    @Override
    public Response intercept(Interceptor.Chain chain) throws IOException {
        Request original = chain.request();

        Request request = original.newBuilder()
            .header("User-Agent", "Your-App-Name")
            .header("Accept", "application/vnd.yourapi.v1.full+json")
            .method(original.method(), original.body())
            .build();

        return chain.proceed(request);
    }
}

OkHttpClient client = httpClient.build();  
Retrofit retrofit = new Retrofit.Builder()

You can add authenticator in the request and you can also write a logic of token regeneration process