How to remove cookies using CookieManager for a specific domain?

public void clearCookies(String domain) {
    CookieManager cookieManager = CookieManager.getInstance();
    String cookiestring = cookieManager.getCookie(domain);
    String[] cookies =  cookiestring.split(";");
    for (int i=0; i<cookies.length; i++) {
        String[] cookieparts = cookies[i].split("=");
        cookieManager.setCookie(domain, cookieparts[0].trim()+"=; Expires=Wed, 31 Dec 2025 23:59:59 GMT");
    }
}

Call android.webkit.CookieManager's getCookie method to generate a RFC 2109 Cookie header for the URL or domain you are interested. Parse the cookie header to get a list of cookie names. For each cookie name, generate a RFC 2109 Set-Cookie header for that name that has an expiry date in the past and pass it into CookieManager's setCookie method. Although the API docs specify that setCookie ignores values that have expired, Android's current implementation actually flushes the cookie in this case. To guard against future implementations that do ignore expired values as specified in the documentation, check that the cookies were actually removed and perform some fallback behaviour if they haven't—CookieManager's removeAllCookie method may be useful for this fallback.

Here is a code sample from an open source project. Maybe could help someone.

https://github.com/janrain/engage.android/blob/96f21b45738ef82a911e27d8a707aff3a1024d36/Jump/src/com/janrain/android/utils/WebViewUtils.java

private static void deleteWebViewCookiesForDomain(Context context, String domain, boolean secure) {
    CookieSyncManager csm = CookieSyncManager.createInstance(context);
    CookieManager cm = CookieManager.getInstance();

    /* http://code.google.com/p/android/issues/detail?id=19294 */
    if (AndroidUtils.SDK_INT >= 11) {
        // don't trim leading '.'s
    } else {
        /* Trim leading '.'s */
        if (domain.startsWith(".")) domain = domain.substring(1);
    }

    /* Cookies are stored by domain, and are not different for different schemes (i.e. http vs
     * https) (although they do have an optional 'secure' flag.) */
    domain = "http" + (secure ? "s" : "") + "://" + domain;
    String cookieGlob = cm.getCookie(domain);
    if (cookieGlob != null) {
        String[] cookies = cookieGlob.split(";");
        for (String cookieTuple : cookies) {
            String[] cookieParts = cookieTuple.split("=");

            /* setCookie has changed a lot between different versions of Android with respect to
             * how it handles cookies like these, which are set in order to clear an existing
             * cookie.  This way of invoking it seems to work on all versions. */
            cm.setCookie(domain, cookieParts[0] + "=;");

            /* These calls have worked for some subset of the the set of all versions of
             * Android:
             * cm.setCookie(domain, cookieParts[0] + "=");
             * cm.setCookie(domain, cookieParts[0]); */
        }
        csm.sync();
    }
}