在app登录过后，webview页面使用app登录cookie直接进入

String cookieFields = response.getHeaders("Set-Cookie")[0] .getValue(); String cookie = cookieFields.split(";\\s*")[0]; HttpGet nextGet = new HttpGet(url); nextGet.setHeader("Cookie", cookie);
                            CookieSyncManager.createInstance(MainActivity.this);
                            CookieManager cookieManager = CookieManager.getInstance();
                            cookieManager.setAcceptCookie(true);
                            cookieManager.setCookie("http://112.124.12.46", cookieFields);//cookies是在HttpClient中获得的cookie
                            CookieSyncManager.getInstance().sync();

CookieSyncManager.createInstance(WebViewActivity.this);    
CookieManager.getInstance();