http://blog.youkuaiyun.com/chang_xing/article/details/8158866
/**
* 同步一下cookie
*/
public static void synCookies(Context context, String url) {
CookieSyncManager.createInstance(context);
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
cookieManager.removeSessionCookie();//移除
cookieManager.setCookie(url, cookies);//cookies是在HttpClient中获得的cookie
CookieSyncManager.getInstance().sync();
}