参考：

<appmsg appid="" sdkver="0">

<title>这是标题</title>

<des>这是描述</des>

<action>view</action>

<type>5</type>

<showtype>0</showtype>

<soundtype>0</soundtype>

<mediatagname />

<messageext />

<messageaction />

<content />

<contentattr>0</contentattr>

<url>这是卡片的的跳转地址</url>

<lowurl />

<dataurl />

<lowdataurl />

<appattach>

<totallen>0</totallen>

<attachid />

<emoticonmd5 />

<fileext />

<cdnthumbaeskey />

<aeskey />

</appattach>

<extinfo />

<sourceusername />

<sourcedisplayname />

<thumburl>这是卡片图片的显示地址</thumburl>

<md5 />

<statextstr />

<webviewshared>

<jsAppId />

</webviewshared>

</appmsg>