Android làm thế nào để xác định âm thanh/video từ xml?

Question

Tôi đang làm việc để đọc âm thanh, tin tức video từ nguồn cấp dữ liệu rss. Làm cách nào để xác định liệu rss đó có dành cho trình đọc tin tức hoặc âm thanh hoặc video không?

Đây là một cấp dữ liệu video: http://feeds.cbsnews.com/CBSNewsVideo và đây là thức ăn chăn nuôi văn bản: http://indiatoday.feedsportal.com/c/33614/f/589699/index.rss

Bằng cách mở này, chúng ta có thể hiểu được cho dù đó là video hoặc văn bản. Làm thế nào chúng ta có thể biết, trong khi phân tích cú pháp tệp XML này?

EDIT: Xml cho http://feeds.cbsnews.com/CBSNewsVideo

<?xml version="1.0" encoding="UTF-8"?> 
    <?xml-stylesheet type="text/xsl" media="screen" href="/~d/styles/rss2enclosuresfull.xsl"?><?xml-stylesheet type="text/css" media="screen" href="http://feeds.cbsnews.com/~d/styles/itemcontent.css"?><rss xmlns:s="http://www.cbsnews.com" xmlns:media="http://search.yahoo.com/mrss/" xmlns:feedburner="http://rssnamespace.org/feedburner/ext/1.0" version="2.0"> 
      <channel> 
       <link>http://www.cbsnews.com</link> 
       <title>More from CBS News Video - CBS News</title> 
       <language>en-us</language> 
       <ttl>5</ttl> 
       <description>Read the latest CBS News Video headlines on CBS News, covering news stories, videos and pictures of world and US news, as well as news in politics, health, sports and business.</description> 

       <copyright>Your (optional) copyright message</copyright> 
        <pubDate>Fri, 07 Jun 2013 08:54:39 EDT</pubDate> 
        <atom10:link xmlns:atom10="http://www.w3.org/2005/Atom" rel="self" type="application/rss+xml" href="http://feeds.cbsnews.com/CBSNewsVideo" /><feedburner:info uri="cbsnewsvideo" /><atom10:link xmlns:atom10="http://www.w3.org/2005/Atom" rel="hub" href="http://pubsubhubbub.appspot.com/" /><media:copyright>Your (optional) copyright message</media:copyright><media:thumbnail url="http://www.myserver.com/podcastlogo.jpg" /><media:keywords>Type,in,keywords,separated,by,spaces,that,can,help,listeners,locate,your,podcast,when,searching,with,iTunes</media:keywords><image><link>http://www.cbsnews.com/</link><url>http://wwwimage.cbsnews.com/common/images/v2/logo_cbsnews_small.gif</url><title>CBSNews.com</title></image><feedburner:feedFlare href="http://add.my.yahoo.com/rss?url=http%3A%2F%2Ffeeds.cbsnews.com%2FCBSNewsVideo" src="http://us.i1.yimg.com/us.yimg.com/i/us/my/addtomyyahoo4.gif">Subscribe with My Yahoo!</feedburner:feedFlare><feedburner:feedFlare href="http://www.newsgator.com/ngs/subscriber/subext.aspx?url=http%3A%2F%2Ffeeds.cbsnews.com%2FCBSNewsVideo" src="http://www.newsgator.com/images/ngsub1.gif">Subscribe with NewsGator</feedburner:feedFlare><feedburner:feedFlare href="http://www.netvibes.com/subscribe.php?url=http%3A%2F%2Ffeeds.cbsnews.com%2FCBSNewsVideo" src="http://www.netvibes.com/img/add2netvibes.gif">Subscribe with Netvibes</feedburner:feedFlare><feedburner:feedFlare href="http://fusion.google.com/add?feedurl=http%3A%2F%2Ffeeds.cbsnews.com%2FCBSNewsVideo" src="http://buttons.googlesyndication.com/fusion/add.gif">Subscribe with Google</feedburner:feedFlare><feedburner:feedFlare href="http://www.pageflakes.com/subscribe.aspx?url=http%3A%2F%2Ffeeds.cbsnews.com%2FCBSNewsVideo" src="http://www.pageflakes.com/ImageFile.ashx?instanceId=Static_4&amp;fileName=ATP_blu_91x17.gif">Subscribe with Pageflakes</feedburner:feedFlare><feedburner:feedFlare href="http://www.live.com/?add=http%3A%2F%2Ffeeds.cbsnews.com%2FCBSNewsVideo" src="http://tkfiles.storage.msn.com/x1piYkpqHC_35nIp1gLE68-wvzLZO8iXl_JMledmJQXP-XTBOLfmQv4zhj4MhcWEJh_GtoBIiAl1Mjh-ndp9k47If7hTaFno0mxW9_i3p_5qQw">Subscribe with Live.com</feedburner:feedFlare><feedburner:feedFlare href="http://odeo.com/listen/subscribe?feed=http%3A%2F%2Ffeeds.cbsnews.com%2FCBSNewsVideo" src="http://odeo.com/img/badge-channel-black.gif">Subscribe with ODEO</feedburner:feedFlare><feedburner:feedFlare href="http://www.podnova.com/add.srf?url=http%3A%2F%2Ffeeds.cbsnews.com%2FCBSNewsVideo" src="http://www.podnova.com/img_chicklet_podnova.gif">Subscribe with Podnova</feedburner:feedFlare><item> 

          <title>Video: Drowning: The real signs a swimmer is in danger</title> 
         <link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/ZQzIjwZR3Xg/</link> 
         <description>CBS News' Don Dahler reports on drowning -- the second most common cause of accidental death in children aged 14 and younger -- and how to prevent it by knowing what drowning really looks like.&lt;div class="feedflare"&gt; 
    &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=ZQzIjwZR3Xg:Fa5H9AQULHc:w--LzT5DBIM"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=ZQzIjwZR3Xg:Fa5H9AQULHc:w--LzT5DBIM" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=ZQzIjwZR3Xg:Fa5H9AQULHc:yIl2AUoC8zA"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?d=yIl2AUoC8zA" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=ZQzIjwZR3Xg:Fa5H9AQULHc:V_sGLiPBpWU"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=ZQzIjwZR3Xg:Fa5H9AQULHc:V_sGLiPBpWU" border="0"&gt;&lt;/img&gt;&lt;/a&gt; 
    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/ZQzIjwZR3Xg" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148435n</guid>     
          <pubDate>Fri, 07 Jun 2013 08:54:39 EDT</pubDate>  
        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148435n</feedburner:origLink></item> 
        <item> 
          <title>Video: Russian President Putin and wife announce divorce</title> 
         <link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/aOQ7ONwOxT8/</link> 
         <description>After years of speculation, Russian President Vladimir Putin and his wife announced they are getting a divorce, less than two months shy of their 30th wedding anniversary. Norah O'Donnell reports.&lt;div class="feedflare"&gt; 
    &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=aOQ7ONwOxT8:m3EGbztX7-k:w--LzT5DBIM"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=aOQ7ONwOxT8:m3EGbztX7-k:w--LzT5DBIM" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=aOQ7ONwOxT8:m3EGbztX7-k:yIl2AUoC8zA"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?d=yIl2AUoC8zA" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=aOQ7ONwOxT8:m3EGbztX7-k:V_sGLiPBpWU"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=aOQ7ONwOxT8:m3EGbztX7-k:V_sGLiPBpWU" border="0"&gt;&lt;/img&gt;&lt;/a&gt; 
    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/aOQ7ONwOxT8" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148430n</guid>   
          <pubDate>Fri, 07 Jun 2013 08:52:58 EDT</pubDate>  
        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148430n</feedburner:origLink></item> 

        <item> 

          <title>Video: Headlines: Defamation suit filed over "Bag Men" headline</title>   
       <link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/sbd4yNXRaJk/</link> 
         <description>"CBS This Morning" takes a look at some of the day's headlines from around the globe.&lt;div class="feedflare"&gt; 
    &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=sbd4yNXRaJk:7kbI768YfDI:w--LzT5DBIM"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=sbd4yNXRaJk:7kbI768YfDI:w--LzT5DBIM" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=sbd4yNXRaJk:7kbI768YfDI:yIl2AUoC8zA"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?d=yIl2AUoC8zA" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=sbd4yNXRaJk:7kbI768YfDI:V_sGLiPBpWU"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=sbd4yNXRaJk:7kbI768YfDI:V_sGLiPBpWU" border="0"&gt;&lt;/img&gt;&lt;/a&gt; 
    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/sbd4yNXRaJk" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148434n</guid>    
          <pubDate>Fri, 07 Jun 2013 08:10:35 EDT</pubDate>  
        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148434n</feedburner:origLink></item> 
        <item> 
          <title>Video: Prince Philip back in the hospital for surgery</title> 
         <link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/KkcbZxeHEc4/</link> 
         <description>In Britain, Queen Elizabeth II's 92-year-old husband Prince Philip is back in the hospital. He'll be undergoing surgery, and is expected to remain hospitalized for up to two weeks. Charlie D'Agata reports from London.&lt;div class="feedflare"&gt; 
    &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=KkcbZxeHEc4:EESGGAnvV80:w--LzT5DBIM"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=KkcbZxeHEc4:EESGGAnvV80:w--LzT5DBIM" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=KkcbZxeHEc4:EESGGAnvV80:yIl2AUoC8zA"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?d=yIl2AUoC8zA" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=KkcbZxeHEc4:EESGGAnvV80:V_sGLiPBpWU"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=KkcbZxeHEc4:EESGGAnvV80:V_sGLiPBpWU" border="0"&gt;&lt;/img&gt;&lt;/a&gt; 
    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/KkcbZxeHEc4" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148433n</guid>    
          <pubDate>Fri, 07 Jun 2013 08:10:33 EDT</pubDate> 
        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148433n</feedburner:origLink></item> 
<item> 

          <title>Video: Jobs report preview: Why Wall Street will be watching</title> 
<link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/OlFkxwyPgQY/</link> 
         <description>Wall Street investors will be watching the jobs report after a turbulent week in the markets. Anthony Mason takes a look at the importance of this report.&lt;div class="feedflare"&gt; 
    &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=OlFkxwyPgQY:GiiVhaE-SrA:w--LzT5DBIM"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=OlFkxwyPgQY:GiiVhaE-SrA:w--LzT5DBIM" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=OlFkxwyPgQY:GiiVhaE-SrA:yIl2AUoC8zA"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?d=yIl2AUoC8zA" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=OlFkxwyPgQY:GiiVhaE-SrA:V_sGLiPBpWU"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=OlFkxwyPgQY:GiiVhaE-SrA:V_sGLiPBpWU" border="0"&gt;&lt;/img&gt;&lt;/a&gt; 
    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/OlFkxwyPgQY" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148432n</guid> 
        <pubDate>Fri, 07 Jun 2013 08:10:31 EDT</pubDate> 


        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148432n</feedburner:origLink></item> 
<item> 

          <title>Video: Cyber security may take center stage at U.S., China summit</title> 
<link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/sSonCH7od9s/</link> 
         <description>The relationship between the United States and China will be tested this weekend in California, as President Obama and China's new president, Xi Jinping, will discuss economic issues, North Korea and particularly, cyber security will come to the fore. Chip Reid reports.&lt;div class="feedflare"&gt; 
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    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/sSonCH7od9s" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148431n</guid> 
          <pubDate>Fri, 07 Jun 2013 08:10:29 EDT</pubDate> 

        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148431n</feedburner:origLink></item> 

        <item> 
          <title>Video: Tracking tropical storm Andrea</title> 
<link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/qAPkZQEXNK4/</link> 
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         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148427n</guid> 

          <pubDate>Fri, 07 Jun 2013 07:53:16 EDT</pubDate> 
        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148427n</feedburner:origLink></item> 

        <item> 
          <title>Video: Tropical storm Andrea threatens East Coast</title>         
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    &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=-fOcL8rqkR4:oufe73J_G-M:w--LzT5DBIM"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=-fOcL8rqkR4:oufe73J_G-M:w--LzT5DBIM" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=-fOcL8rqkR4:oufe73J_G-M:yIl2AUoC8zA"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?d=yIl2AUoC8zA" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=-fOcL8rqkR4:oufe73J_G-M:V_sGLiPBpWU"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=-fOcL8rqkR4:oufe73J_G-M:V_sGLiPBpWU" border="0"&gt;&lt;/img&gt;&lt;/a&gt; 
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         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148426n</guid> 




          <pubDate>Fri, 07 Jun 2013 07:53:17 EDT</pubDate> 


        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148426n</feedburner:origLink></item> 
        <item>      
          <title>Video: Miller on secret surveillance: "This is spying business"</title> 

<link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/vFqAAwERzZs/</link> 
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    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/vFqAAwERzZs" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148425n</guid> 




          <pubDate>Fri, 07 Jun 2013 07:38:15 EDT</pubDate> 


        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148425n</feedburner:origLink></item> 
        <item>      
          <title>Video: New details revealed about govt.'s secret surveillance</title> 
<link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/XTpjoUk292c/</link> 
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    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/XTpjoUk292c" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148424n</guid> 
          <pubDate>Fri, 07 Jun 2013 07:36:15 EDT</pubDate> 
        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148424n</feedburner:origLink></item> 
        <item> 
          <title>Video: Eye Opener: Tropical storm Andrea batters East Coast</title> 
         <link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/dq-HFJaMVzo/</link> 
         <description>Tropical storm Andrea is racing up the East Coast. Also, new information that the government is watching more than your phone calls. Plus, Julian Assange speaks out from political asylum. All that, and all that mattered, in today's "Eye Opener."&lt;div class="feedflare"&gt; 
    &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=dq-HFJaMVzo:6LEtjxNyVmA:w--LzT5DBIM"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=dq-HFJaMVzo:6LEtjxNyVmA:w--LzT5DBIM" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=dq-HFJaMVzo:6LEtjxNyVmA:yIl2AUoC8zA"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?d=yIl2AUoC8zA" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=dq-HFJaMVzo:6LEtjxNyVmA:V_sGLiPBpWU"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=dq-HFJaMVzo:6LEtjxNyVmA:V_sGLiPBpWU" border="0"&gt;&lt;/img&gt;&lt;/a&gt; 
    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/dq-HFJaMVzo" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148423n</guid> 
          <pubDate>Fri, 07 Jun 2013 07:51:42 EDT</pubDate> 
        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148423n</feedburner:origLink></item> 
        <item> 
          <title>Video: Melinda Gates inspires grads to leave their mark with technology</title>     <link>http://feeds.cbsnews.com/~r/CBSNewsVideo/~3/xXfT5uJJ3hg/</link> 
         <description>Melinda Gates and other famous faces made 2013 commencement speeches at universities across the country. They sought to inspire graduates to be good to everyone and follow their civic obligations.&lt;div class="feedflare"&gt; 
    &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=xXfT5uJJ3hg:v_JlVdQq0dA:w--LzT5DBIM"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=xXfT5uJJ3hg:v_JlVdQq0dA:w--LzT5DBIM" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=xXfT5uJJ3hg:v_JlVdQq0dA:yIl2AUoC8zA"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?d=yIl2AUoC8zA" border="0"&gt;&lt;/img&gt;&lt;/a&gt; &lt;a href="http://feeds.cbsnews.com/~ff/CBSNewsVideo?a=xXfT5uJJ3hg:v_JlVdQq0dA:V_sGLiPBpWU"&gt;&lt;img src="http://feeds.feedburner.com/~ff/CBSNewsVideo?i=xXfT5uJJ3hg:v_JlVdQq0dA:V_sGLiPBpWU" border="0"&gt;&lt;/img&gt;&lt;/a&gt; 
    &lt;/div&gt;&lt;img src="http://feeds.feedburner.com/~r/CBSNewsVideo/~4/xXfT5uJJ3hg" height="1" width="1"/&gt;</description> 
         <guid isPermaLink="false">http://www.cbsnews.com/video/watch/?id=50148399n</guid> 
          <pubDate>Fri, 07 Jun 2013 08:35:59 EDT</pubDate> 
        <author>Your (optional) podcast author email address (Your (optional) podcast author name)</author><feedburner:origLink>http://www.cbsnews.com/video/watch/?id=50148399n</feedburner:origLink></item> 

      <media:credit role="author">Your (optional) podcast author name</media:credit><media:rating>nonadult</media:rating></channel> 
     </rss> 

Answer 1

Một RSS feed luôn chứa văn bản. Văn bản này được phân tách trong một số danh mục, như Tiêu đề, Mô tả, Tác giả, Ngày xuất bản, Liên kết, v.v. Thông thường, văn bản Mô tả chứa tất cả hoặc một phần của tin chính, trong khi văn bản Liên kết chứa URL để đọc tin tức trong trang nguồn. Trong trường hợp tin tức CBS, văn bản Liên kết chứa liên kết đến một trang trong trang web của họ chứa video tin tức. Họ cũng có thể đưa video được nhúng vào HTML của văn bản Mô tả.

Không có cách an toàn để kiểm tra xem nguồn cấp dữ liệu RSS có chứa video hay không, nhưng bạn có thể thử ít nhất hai thứ (tắt đầu đầu): 1. Phân tích cú pháp HTML của văn bản Mô tả là bất kỳ liên kết video được nhúng nào 2. Tải xuống và phân tích cú pháp HTML của trang được liên kết đến trong văn bản Liên kết để xem có bất kỳ liên kết video được nhúng nào không

Tùy chọn thứ hai sẽ hoạt động đối với nguồn cấp dữ liệu CBS News. Tuy nhiên, có một số cách mà video có thể được nhúng vào một trang HTML và bạn sẽ cần phải làm cho trình phân tích cú pháp của bạn tìm tất cả chúng.

Answer 2

Bạn có thể làm điều này ..

URL url = new URL("http://www.engadget.com/rss.xml"); 
URLConnection conn = url.openConnection(); 
System.out.println("Content-Type:"+conn.getHeaderField("Content-Type")); 

Answer 3

Có liên quan đến câu trả lời sớm hơn: Nguồn cấp dữ liệu RSS là danh sách mục, trong mô tả mặt hàng bạn thấy mã HTML hiển thị (mã thoát HTML, để thẻ được tạo thẻ an toàn trong tệp XML, vì vậy bạn cần unescape này tất nhiên). Theo quan điểm của tôi, người ta có thể hiển thị mô tả dưới dạng một chế độ xem web. Nhưng tôi nghĩ điều này giới thiệu các vấn đề về hiệu năng. Để tìm hiểu, phương tiện bên ngoài nào bị ẩn, bạn cần phân tích cú pháp mã HTML được nhúng và ở đó tôi mất khả năng sáng tạo, sau khi theo các liên kết như vậy, bạn sẽ đến trang có phương tiện nhúng và một số may mắn bạn có thể url video trong số này (chủ yếu là nó bằng cách nào đó scrambled afaik)

Một điều lạ là, tôi thấy rất thường xuyên từ "feedburner". Có thể "Videostreams" là một tính năng cụ thể của một công cụ hoặc nhà cung cấp Feedreader cụ thể?