webWiew 加载一个网页，怎么让这个网页上面的video控件播放我SD卡上的视频
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="viewport" content=""/>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>FamilyAlbum</title>
<script src="//cdn.bootcss.com/jquery/1.11.3/jquery.min.js"></script>
<style>
* {
margin:0px;
padding:0px;
}
</style>
</head>
<body >
<div style="height:100%;width:100%">
<div style="background:#0000FF";width="100%";height="5%">
<marquee><font color="#FFFFFF">马云今日也通过 微博回应了这一事件。</font></marquee>
</div>
<div style="height:100%;width:100%">
<video id="videoTag" src = "background1" height="90%" width="100%">
<source src="/mnt/extsd/back1.mp4" type="video/mp4" />
</video>
</div>
<div style="background:red"; width="100%"; height="5%"" >
<font color="#FFFFFF"><marquee background="#ff0000">[财经快讯]中国央行发布了>
</div>
</div>
<script language="javascript" type="text/javascript">
$("document").ready(function(){
var videos = document.getElementById('videoTag');
//alert("刚进来第一步,调用代码的方法");
timer()
});
function timer(){
var videos = document.getElementById('videoTag');
videos.play();
setInterval("isend()",5000);
}
function isend()
{
//document.getElementById("demo").innerHTML="My First JavaScript Function";
var videos = document.getElementById('videoTag');
//alert(videos.ended);
if(videos.ended){
//videos.autoplay='autoplay';
//videos.play();
// 播放完了就寻找下一个视频
getUrl();
}
}
function myFunction()
{
//document.getElementById("demo").innerHTML="My First JavaScript Function";
var videos = document.getElementById('videoTag');
videos.loop = true;
videos.autoplay='autoplay';
videos.play();
}
function videoPause()
{
//document.getElementById("demo").innerHTML="My First JavaScript Function";
var videos = document.getElementById('videoTag');
videos.loop = 'loop';
videos.pause();
}
function updateSrc(str)
{
alert("第三步："+str);
//document.getElementById("demo").innerHTML="My First JavaScript Function";
var videos = document.getElementById('videoTag');
//videos.src = "back";
videos.autoplay='autoplay';
videos.play();
timer();
}
function getUrl(){
alert("第二步：getUrl");
window.demo.clickOnAndroid();
}
function getUrl1(str){
alert("第三步："+str);
var videos = document.getElementById('videoTag');
videos.src = "/mnt/extsd/back1.mp4"
videos.autoplay='autoplay';
videos.play();
timer();
}
</script>
</body>
</html>
