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diff --git a/docs/allclasses-frame.html b/docs/allclasses-frame.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>所有类</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -18,6 +18,7 @@ <h1 class="bar">所有类</h1>
 <li><a href="media/helper/BecomeNoiseHelper.html" title="media.helper中的类" target="classFrame">BecomeNoiseHelper</a></li>
 <li><a href="media/helper/BecomeNoiseHelper.OnBecomeNoiseListener.html" title="media.helper中的接口" target="classFrame"><span class="interfaceName">BecomeNoiseHelper.OnBecomeNoiseListener</span></a></li>
 <li><a href="media/helper/MediaButtonHelper.html" title="media.helper中的类" target="classFrame">MediaButtonHelper</a></li>
+<li><a href="media/helper/MediaButtonHelper.MediaListener.html" title="media.helper中的类" target="classFrame">MediaButtonHelper.MediaListener</a></li>
 <li><a href="media/helper/MediaButtonHelper.OnMediaButtonActionListener.html" title="media.helper中的接口" target="classFrame"><span class="interfaceName">MediaButtonHelper.OnMediaButtonActionListener</span></a></li>
 </ul>
 </div>

diff --git a/docs/allclasses-noframe.html b/docs/allclasses-noframe.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>所有类</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -18,6 +18,7 @@ <h1 class="bar">所有类</h1>
 <li><a href="media/helper/BecomeNoiseHelper.html" title="media.helper中的类">BecomeNoiseHelper</a></li>
 <li><a href="media/helper/BecomeNoiseHelper.OnBecomeNoiseListener.html" title="media.helper中的接口"><span class="interfaceName">BecomeNoiseHelper.OnBecomeNoiseListener</span></a></li>
 <li><a href="media/helper/MediaButtonHelper.html" title="media.helper中的类">MediaButtonHelper</a></li>
+<li><a href="media/helper/MediaButtonHelper.MediaListener.html" title="media.helper中的类">MediaButtonHelper.MediaListener</a></li>
 <li><a href="media/helper/MediaButtonHelper.OnMediaButtonActionListener.html" title="media.helper中的接口"><span class="interfaceName">MediaButtonHelper.OnMediaButtonActionListener</span></a></li>
 </ul>
 </div>

diff --git a/docs/constant-values.html b/docs/constant-values.html
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 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>常量字段值</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
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diff --git a/docs/deprecated-list.html b/docs/deprecated-list.html
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-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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diff --git a/docs/help-doc.html b/docs/help-doc.html
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-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:26 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>API 帮助</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
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diff --git a/docs/index-files/index-1.html b/docs/index-files/index-1.html
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 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>A - 索引</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
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diff --git a/docs/index-files/index-2.html b/docs/index-files/index-2.html
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-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>B - 索引</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>

diff --git a/docs/index-files/index-3.html b/docs/index-files/index-3.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
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 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>H - 索引</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
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diff --git a/docs/index-files/index-4.html b/docs/index-files/index-4.html
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-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>M - 索引</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>

diff --git a/docs/index-files/index-5.html b/docs/index-files/index-5.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>O - 索引</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>

diff --git a/docs/index-files/index-6.html b/docs/index-files/index-6.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>R - 索引</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>

diff --git a/docs/index-files/index-7.html b/docs/index-files/index-7.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>U - 索引</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>

diff --git a/docs/index.html b/docs/index.html
@@ -2,7 +2,7 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:26 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>生成的文档 (无标题)</title>
 <script type="text/javascript">

diff --git a/docs/media/helper/AudioFocusHelper.OnAudioFocusChangeListener.html b/docs/media/helper/AudioFocusHelper.OnAudioFocusChangeListener.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>AudioFocusHelper.OnAudioFocusChangeListener</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>

diff --git a/docs/media/helper/AudioFocusHelper.html b/docs/media/helper/AudioFocusHelper.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>AudioFocusHelper</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>

diff --git a/docs/media/helper/BecomeNoiseHelper.OnBecomeNoiseListener.html b/docs/media/helper/BecomeNoiseHelper.OnBecomeNoiseListener.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>BecomeNoiseHelper.OnBecomeNoiseListener</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>

diff --git a/docs/media/helper/BecomeNoiseHelper.html b/docs/media/helper/BecomeNoiseHelper.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>BecomeNoiseHelper</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>

diff --git a/docs/media/helper/MediaButtonHelper.MediaListener.html b/docs/media/helper/MediaButtonHelper.MediaListener.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>MediaButtonHelper.MediaListener</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -116,7 +116,7 @@ <h2 title="类 MediaButtonHelper.MediaListener" class="title">类 MediaButtonHel
 </dl>
 <hr>
 <br>
-<pre>public abstract class <span class="typeNameLabel">MediaButtonHelper.MediaListener</span>
+<pre>public abstract static class <span class="typeNameLabel">MediaButtonHelper.MediaListener</span>
 extends java.lang.Object
 implements <a href="../../media/helper/MediaButtonHelper.OnMediaButtonActionListener.html" title="media.helper中的接口">MediaButtonHelper.OnMediaButtonActionListener</a></pre>
 <div class="block">多媒体回调接口。该类是个抽象类，它实现了 <a href="../../media/helper/MediaButtonHelper.OnMediaButtonActionListener.html" title="media.helper中的接口"><code>MediaButtonHelper.OnMediaButtonActionListener</code></a> 接口，并对多媒体相关的媒体按钮事件进行了封装。</div>

diff --git a/docs/media/helper/MediaButtonHelper.OnMediaButtonActionListener.html b/docs/media/helper/MediaButtonHelper.OnMediaButtonActionListener.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>MediaButtonHelper.OnMediaButtonActionListener</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -109,7 +109,7 @@ <h2 title="接口 MediaButtonHelper.OnMediaButtonActionListener" class="title">
 <hr>
 <br>
 <pre>public static interface <span class="typeNameLabel">MediaButtonHelper.OnMediaButtonActionListener</span></pre>
-<div class="block">回调接口。但检测到某个媒体按钮被触发时，该回调接口中的方法会被调用。</div>
+<div class="block">回调接口。当检测到某个媒体按钮被触发时，该回调接口中的方法会被调用。</div>
 </li>
 </ul>
 </div>

diff --git a/docs/media/helper/MediaButtonHelper.html b/docs/media/helper/MediaButtonHelper.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>MediaButtonHelper</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -112,12 +112,25 @@ <h2 title="类 MediaButtonHelper" class="title">类 MediaButtonHelper</h2>
 extends java.lang.Object</pre>
 <div class="block">用于帮助监听系统的 <b>Intent.ACTION_MEDIA_BUTTON</b> 媒体按钮事件。
  <p>
- 你可以通过调用 <a href="../../media/helper/MediaButtonHelper.html#registerMediaButtonReceiver--"><code>registerMediaButtonReceiver()</code></a> 来注册一个媒体按钮广播监听器。
+ 该帮助类提供了 2 种注册 MediaButton 事件监听器的方法：
  <p>
- 如果你使用了 MediaSession 框架，那么可以不调用 <a href="../../media/helper/MediaButtonHelper.html#registerMediaButtonReceiver--"><code>registerMediaButtonReceiver()</code></a> 来注册媒体按钮广
- 播监听器，而是在 AndroidManifest.xml 文件中进行注册。
+ <b>第一种方法</b>：通过调用 <a href="../../media/helper/MediaButtonHelper.html#registerMediaButtonReceiver--"><code>registerMediaButtonReceiver()</code></a> 来注册一个媒体按钮广播监听器。
  <p>
- <p><b>例：</b></p>
+ <b>例 1：</b><br>
+ <code>
+ <pre>
+ // 注册 MediaButton 事件监听器
+ mediaButtonHelper.registerMediaButtonReceiver()
+
+ // 取消注册 MediaButton 事件监听器
+ mediaButtonHelper.unregisterMediaButtonReceiver()
+ </pre>
+ </code>
+ <p>
+ <b>第二张方法</b>：通过 AndroidManifest.xml 文件进行注册。如果你使用了 MediaSession 框架，推荐使用这种方
+ 法进行注册。
+ <p>
+ <p><b>例 2：</b></p>
  在 AndroidManifest.xml 文件中注册媒体按钮广播监听器：
  <p>
  <code>
@@ -175,7 +188,7 @@ <h3>嵌套类概要</h3>
 <th class="colLast" scope="col">类和说明</th>
 </tr>
 <tr class="altColor">
-<td class="colFirst"><code>class&nbsp;</code></td>
+<td class="colFirst"><code>static class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../media/helper/MediaButtonHelper.MediaListener.html" title="media.helper中的类">MediaButtonHelper.MediaListener</a></span></code>
 <div class="block">多媒体回调接口。</div>
 </td>

diff --git a/docs/media/helper/package-frame.html b/docs/media/helper/package-frame.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>media.helper</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -23,6 +23,7 @@ <h2 title="类">类</h2>
 <li><a href="AudioFocusHelper.html" title="media.helper中的类" target="classFrame">AudioFocusHelper</a></li>
 <li><a href="BecomeNoiseHelper.html" title="media.helper中的类" target="classFrame">BecomeNoiseHelper</a></li>
 <li><a href="MediaButtonHelper.html" title="media.helper中的类" target="classFrame">MediaButtonHelper</a></li>
+<li><a href="MediaButtonHelper.MediaListener.html" title="media.helper中的类" target="classFrame">MediaButtonHelper.MediaListener</a></li>
 </ul>
 </div>
 </body>

diff --git a/docs/media/helper/package-summary.html b/docs/media/helper/package-summary.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>media.helper</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -128,6 +128,12 @@ <h1 title="程序包" class="title">程序包&nbsp;media.helper</h1>
 <div class="block">用于帮助监听系统的 <b>Intent.ACTION_MEDIA_BUTTON</b> 媒体按钮事件。</div>
 </td>
 </tr>
+<tr class="rowColor">
+<td class="colFirst"><a href="../../media/helper/MediaButtonHelper.MediaListener.html" title="media.helper中的类">MediaButtonHelper.MediaListener</a></td>
+<td class="colLast">
+<div class="block">多媒体回调接口。</div>
+</td>
+</tr>
 </tbody>
 </table>
 </li>

diff --git a/docs/media/helper/package-tree.html b/docs/media/helper/package-tree.html
@@ -2,10 +2,10 @@
 <!-- NewPage -->
 <html lang="zh">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Tue Jun 09 09:31:20 CST 2020 -->
+<!-- Generated by javadoc (1.8.0_131) on Sun Jun 14 14:31:25 CST 2020 -->
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>media.helper 类分层结构</title>
-<meta name="date" content="2020-06-09">
+<meta name="date" content="2020-06-14">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>