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基于openfire-smack开发Android即时聊天应用-三-账号信息、添加好友、JID理解等.html
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基于openfire-smack开发Android即时聊天应用-三-账号信息、添加好友、JID理解等.html
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<section id="main"><article id="post-基于openfire-smack开发Android即时聊天应用-三-账号信息、添加好友、JID理解等" class="article article-type-post" itemscope itemprop="blogPost">
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基于openfire+smack开发Android即时聊天应用[三]-账号信息、添加好友、JID理解等
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<a class="tag-link" href="/tags/Android/">Android</a>, <a class="tag-link" href="/tags/IM/">IM</a>, <a class="tag-link" href="/tags/Openfire/">Openfire</a>, <a class="tag-link" href="/tags/smack/">smack</a>
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<p>这一篇文章主要介绍账号的属性及几个重要属性的理解，同时介绍如何添加好友，获取好友列表信息，最后介绍我对JID这个属性字段的几种理解。</p>
<a id="more"></a>
<h3 id="1-账号信息"><a href="#1-账号信息" class="headerlink" title="1.账号信息"></a>1.账号信息</h3><p>获取账号的所有额外属性信息</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div></pre></td><td class="code"><pre><div class="line"> <span class="comment">/**</span></div><div class="line"> * 获取账户所有属性信息</div><div class="line"> * <span class="doctag">@return</span></div><div class="line"> */</div><div class="line"> <span class="function"><span class="keyword">public</span> Set <span class="title">getAccountAttributes</span><span class="params">()</span> </span>{</div><div class="line"> <span class="keyword">if</span>(isConnected()) {</div><div class="line"> <span class="keyword">try</span> {</div><div class="line"> <span class="keyword">return</span> AccountManager.getInstance(connection).getAccountAttributes();</div><div class="line"> } <span class="keyword">catch</span> (Exception e) {</div><div class="line"><span class="keyword">throw</span> <span class="keyword">new</span> RuntimeException(e);</div><div class="line"> }</div><div class="line"> }</div><div class="line"> <span class="keyword">throw</span> <span class="keyword">new</span> NullPointerException(<span class="string">"服务器连接失败，请先连接服务器"</span>);</div><div class="line"> }</div></pre></td></tr></table></figure>
<p>上面取出的属性集合里主要包含如下几个属性值：</p>
<p><img src="/img/account_att.png" alt=""></p>
<p>上述几个属性中的name属性即为用户的昵称属性，另外用户账号名、密码是不在这些属性当中的，账号名可以理解为是JID，可以通过RosterEntry.getUser这个方法获取，关于JID的理解请看下面的介绍</p>
<h3 id="2-获取当前登录用户的所有好友信息"><a href="#2-获取当前登录用户的所有好友信息" class="headerlink" title="2.获取当前登录用户的所有好友信息"></a>2.获取当前登录用户的所有好友信息</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div></pre></td><td class="code"><pre><div class="line"><span class="comment">/**</span></div><div class="line"> * 获取当前登录用户的所有好友信息</div><div class="line"> * <span class="doctag">@return</span></div><div class="line"> */</div><div class="line"> <span class="function"><span class="keyword">public</span> Set <span class="title">getAllFriends</span><span class="params">()</span> </span>{</div><div class="line"> <span class="keyword">if</span>(isConnected()) {</div><div class="line"> <span class="keyword">return</span> Roster.getInstanceFor(connection).getEntries();</div><div class="line"> }</div><div class="line"> <span class="keyword">throw</span> <span class="keyword">new</span> NullPointerException(<span class="string">"服务器连接失败，请先连接服务器"</span>);</div><div class="line"> }</div></pre></td></tr></table></figure>
<h3 id="3-获取指定账号好友信息"><a href="#3-获取指定账号好友信息" class="headerlink" title="3.获取指定账号好友信息"></a>3.获取指定账号好友信息</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div></pre></td><td class="code"><pre><div class="line"><span class="comment">/**</span></div><div class="line"> * 获取指定账号的好友信息</div><div class="line"> * <span class="doctag">@param</span> user 账号</div><div class="line"> * <span class="doctag">@return</span></div><div class="line"> */</div><div class="line"> <span class="function"><span class="keyword">public</span> RosterEntry <span class="title">getFriend</span><span class="params">(String user)</span> </span>{</div><div class="line"> <span class="keyword">if</span>(isConnected()) {</div><div class="line"> <span class="keyword">return</span> Roster.getInstanceFor(connection).getEntry(user);</div><div class="line"> }</div><div class="line"> <span class="keyword">throw</span> <span class="keyword">new</span> NullPointerException(<span class="string">"服务器连接失败，请先连接服务器"</span>);</div><div class="line"> }</div></pre></td></tr></table></figure>
<h3 id="4-添加好友"><a href="#4-添加好友" class="headerlink" title="4.添加好友"></a>4.添加好友</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div></pre></td><td class="code"><pre><div class="line"> <span class="comment">/**</span></div><div class="line"> * 添加好友</div><div class="line"> * <span class="doctag">@param</span> user 用户账号</div><div class="line"> * <span class="doctag">@param</span> nickName 用户昵称</div><div class="line"> * <span class="doctag">@param</span> groupName 所属组名</div><div class="line"> * <span class="doctag">@return</span></div><div class="line"> */</div><div class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">boolean</span> <span class="title">addFriend</span><span class="params">(String user, String nickName, String groupName)</span> </span>{</div><div class="line"> <span class="keyword">if</span>(isConnected()) {</div><div class="line"> <span class="keyword">try</span> {</div><div class="line"> Roster.getInstanceFor(connection).createEntry(user, nickName, <span class="keyword">new</span> String[]{groupName});</div><div class="line"> <span class="keyword">return</span> <span class="keyword">true</span>;</div><div class="line">} <span class="keyword">catch</span> (NotLoggedInException | NoResponseException | XMPPErrorException </div><div class="line"> | NotConnectedException e) {</div><div class="line"> <span class="keyword">return</span> <span class="keyword">false</span>;</div><div class="line">}</div><div class="line"> }</div><div class="line"> <span class="keyword">throw</span> <span class="keyword">new</span> NullPointerException(<span class="string">"服务器连接失败，请先连接服务器"</span>);</div><div class="line"> }</div></pre></td></tr></table></figure>
<h3 id="5-关于对JID的理解"><a href="#5-关于对JID的理解" class="headerlink" title="5.关于对JID的理解"></a>5.关于对JID的理解</h3><p>我对JID的理解主要是根据我在基于smack开发即时通信聊天应用时遇到的几种情况做的一个归纳，我碰到的JID的介绍主要有三种：</p>
<ol>
<li>每个用户的好友列表中有一个JID，这个可以根据Openfire后台管理系统可以看出来，如下图：Smack_JID上面图中可以清晰的看到每个好友都对应有一个JID，而在我通过<code>addFriend(String user, String nickName, String groupName)</code>这个方法添加好友的时候，参数用户账号user最终就变成了上面的JID，是没有包含@符号和后面的服务器名的，我称这种JID为好友JID，如管理员账号的JID为：admin。这个JID通过官方提供的接口<code>RosterEntry.getUser</code>是可以获取到的。</li>
</ol>
<ol>
<li>好友之间聊天时有一个JID，在我创建聊天窗口对象Chat时(怎么创建请看我下一篇文章)，所传的参数也是JID，但是这个JID和上面的JID的值却又不是一样的，不然会创建失败，我们来看看官方API：</li>
</ol>
<p><img src="/img/Chat_JID.png" alt=""></p>
<p>官方API中很明显的指出了参数为JID，但是我如果真的出好友列表中的JID的话创建聊天对象失败，必须这样传好友<code>JID@ServiceName</code> ，这是第二种JID，我称为聊天JID,比如和管理员聊天时的JID为：<code>admin@192.168.0.108</code></p>
<ol>
<li>好友之间传输文件时又有一个JID，在创建文件传输对象时也需要传递一个参数为JID，我们也来看看官方API：</li>
</ol>
<p><img src="/img/transfer_JID.png" alt=""></p>
<p>官方API中也显示了在获取文件传输对象时需要传递参数为JID，但是这个JID我给的是聊天JID的时候，根本创建不了文件传输对象，后来在网上查了半天，看到别人都在后面加了个Smack，我也试了下，结果竟然成功了，坑爹啊，反正我还没搞清楚这是为什么，格式是这样的：好友<code>JID@ServiceNam/Smack</code>，我称这种JID为文件传输JID，比如聊天时给管理员传文件时的JID为：<code>admin@192.168.0.108/Smack</code></p>
<p>这就是我碰到的JID的三种使用情况</p>
<p>write by laohu</p>
<p>2015-10-30 </p>
<hr>
<p>原创文章，本文采用<a href="https://creativecommons.org/licenses/by/2.5/cn/" target="_blank" rel="external">知识共享署名 2.5(中国大陆许可协议)</a>进行许可，欢迎转载，但转载请注明来自<a href="ittiger.cn">ittiger.cn</a>，并保证转载后文章内容的完整性。本人(laohu)保留所有版权相关权利。</p>
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