在Fragment中保存WebView状态
http://www.lucazanini.eu/2013/android/how-to-save-the-state-of-a-webview-inside-a-fragment-of-an-action-bar/?lang=en
原创作者:http://www.cnblogs.com/huangsheng/
http://www.lucazanini.eu/2013/android/how-to-save-the-state-of-a-webview-inside-a-fragment-of-an-action-bar/?lang=en