Handle Cookies easily with Retrofit/OkHttp

AddCookiesInterceptor.java

/**
 * This interceptor put all the Cookies in Preferences in the Request.
 * Your implementation on how to get the Preferences MAY VARY.
 * <p>
 * Created by tsuharesu on 4/1/15.
 */
public class AddCookiesInterceptor implements Interceptor {

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request.Builder builder = chain.request().newBuilder();
        HashSet<String> preferences = (HashSet) Preferences.getDefaultPreferences().getStringSet(Preferences.PREF_COOKIES, new HashSet<>());
        for (String cookie : preferences) {
            builder.addHeader("Cookie", cookie);
            Log.v("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());
    }
}

ReceivedCookiesInterceptor.java

/**
 * This Interceptor add all received Cookies to the app DefaultPreferences.
 * Your implementation on how to save the Cookies on the Preferences MAY VARY.
 * <p>
 * Created by tsuharesu on 4/1/15.
 */
public class ReceivedCookiesInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Response originalResponse = chain.proceed(chain.request());

        if (!originalResponse.headers("Set-Cookie").isEmpty()) {
            HashSet<String> cookies = new HashSet<>();

            for (String header : originalResponse.headers("Set-Cookie")) {
              cookies.add(header);
            }

            Preferences.getDefaultPreferences().edit()
                    .putStringSet(Preferences.PREF_COOKIES, cookies)
                    .apply();
        }

        return originalResponse;
    }
}

RestClient.java

/**
 * Somewhere you create a new OkHttpClient and use it on all your requests.
 */
OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.interceptors().add(new AddCookiesInterceptor());
okHttpClient.interceptors().add(new ReceivedCookiesInterceptor());

I used above steps to store the cookie then add on request.
Worked on actively on login and continue use.
But once close and open the app not worked.
(Once restart the comes CSRF token invalid issue.)

https://github.com/manimaran96/Spell4Wiki/

It really works. Thanks