public class AddCookiesInterceptor implements Interceptor {

    public static final String PREF_COOKIES = "PREF_COOKIES";
    private Context context;

    public AddCookiesInterceptor(Context context){
        this.context = context;
    }

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request.Builder builder = chain.request().newBuilder();

        HashSet<String> preferences = (HashSet) PreferenceManager
                .getDefaultSharedPreferences(context).
                        getStringSet(PREF_COOKIES, new HashSet<String>());

        for (String cookie : preferences) {
            builder.addHeader("Cookie", cookie);
            Log.e("OkHttp", "Adding Header: " + cookie); // This is done so I know which headers are being added; this interceptor is used after the normal logging of OkHttp
        }
        return chain.proceed(builder.build());
    }
}