How to implement cookie handling on Android using OkHttp?

For OkHttp3, a simple accept-all, non-persistent CookieJar implementation can be as follows:

OkHttpClient client = new OkHttpClient.Builder()
    .cookieJar(new CookieJar() {
        private final HashMap<HttpUrl, List<Cookie>> cookieStore = new HashMap<>();

        @Override
        public void saveFromResponse(HttpUrl url, List<Cookie> cookies) {
            cookieStore.put(url, cookies);
        }

        @Override
        public List<Cookie> loadForRequest(HttpUrl url) {
            List<Cookie> cookies = cookieStore.get(url);
            return cookies != null ? cookies : new ArrayList<Cookie>();
        }
    })
    .build();

Or if you prefer to use java.net.CookieManager, include okhttp-urlconnection in your project, which contains JavaNetCookieJar, a wrapper class that delegates to java.net.CookieHandler:

dependencies {
    compile "com.squareup.okhttp3:okhttp:3.0.0"
    compile "com.squareup.okhttp3:okhttp-urlconnection:3.0.0"
}

---

CookieManager cookieManager = new CookieManager();
cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
OkHttpClient client = new OkHttpClient.Builder()
    .cookieJar(new JavaNetCookieJar(cookieManager))
    .build();