序言

最近在研究直播的彈幕，東西有點多，準備記錄一下免得自​​己忘了又要重新研究，也幫助有這方面需要的同學少走點彎路。關於直播的技術細節其實就是兩個方面一個是推流一個是拉流，而彈幕的實現核心在即時聊天，使用聊天室的就能實現，只是訊息的展示方式不同而已。在大多數的專案中還是使用第三方的直播平臺實現推流功能，因此關於直播平臺的選擇也是至關重要。下面由我娓娓道來。

效果

為了演示方便我把螢幕錄影上傳到優酷了，的英文這視訊地址

功能

1.緩衝進度

2.彈幕

3.橫豎屏切換

實現

1.直播SDK的選擇

提供直播功能的廠商有很多，比如七牛雲，樂視，百度雲，騰訊雲，金山雲，等等。功能也大同小異，常見的縮圖，視訊錄製，轉碼，都可以實現。但是對於SDK的易用程度還是不敢恭維的。下面我說說我遇到的一些問題。

1.樂視

優點： 
樂視直播的註冊流程還是很方便的，選擇個人開發者，然後驗證身份資訊就可以使用了，每人每月免費10GB的流量。

缺點

最大的缺點就是穩定性，至少在我測試的時候也就是2016年年9月份穩定性很差，不是說視訊的穩定性，而是推流的穩定性，我有一臺在同樣的網路下我的體內X7能推流，但是魅藍NOTE2不能推流。然而體內X7推出去的流在電腦上用VLC能播放，在其他手機上顯示黑屏，既不報錯也沒畫面。隨後使用同樣的網路，同樣的魅藍注2，百度的SDK就能推流。看來樂視的直播技術方面還有待改進，直接通。

2.七牛雲

七牛雲官網

優點 
態度好，服務周到，其他方面的不能再評價了，因為沒有真正使用過，這的確很尷尬，不過態度的確很好，會有客服打電話過來詢問需求，會有技術支援人員主動溝通，這是很值得肯定的。

缺點 
倒不能算是缺點，可能算特點吧，七牛雲需要使用域名別名解析來做RTMP直播流域名，也就是說你要使用七牛雲必須要有一個備案過的域名，由於我司的域名我不能輕易去改，而且我也沒有備案過的域名，所以不能測試。

3.騰訊雲

還沒有通過稽核，效率太低。

4.阿里雲

也需要域名，跳過。

5.百度雲

優點

稽核速度挺快的，實名認證大概15分鐘搞定（這是我的速度，僅供參考），不需要域名，為個人開發者免費提供10G的流量測試，這點很良心。而且功能很全面，推流很簡單下面是價格表：

缺點

企業使用者需要認證，否則單月最大流量為1TB，個人使用者總流量限制在1000GB。

經過以上對比最終選擇了百度雲來實現直播。

2.及時聊天SDK的選擇

這裡邊倒沒有太多的考慮，環信，融雲，LeanCloud都可以，但是長期使用leancloud發現其文件質量很高，SDK簡單易用。所以使用了LeanCloud來實現即時通訊。

3.彈幕實現

彈幕說白了就是聊天室，只是聊天室的訊息需要在視訊節目上顯示而已，所以首先要實現一個聊天室，此處使用LeanCloud實現。

第一步：初始化

第二步：登入

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">package</span> com.zgh.livedemo;<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.content.Intent;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.os.Bundle;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.support.v7.app.AppCompatActivity;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.text.TextUtils;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.view.View;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.widget.EditText;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> android.widget.Toast;<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> com.avos.avoscloud.im.v2.AVIMClient;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> com.avos.avoscloud.im.v2.AVIMException;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">import</span> com.avos.avoscloud.im.v2.callback.AVIMClientCallback;<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">LoginActivity</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">extends</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">AppCompatActivity</span> {</span><span style="box-sizing: border-box;"></span>
    EditText et_name;<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
    <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onCreate</span>(Bundle savedInstanceState) {
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span>.onCreate(savedInstanceState);<span style="box-sizing: border-box;"></span>
        setContentView(R.layout.activity_login);<span style="box-sizing: border-box;"></span>
        et_name = (EditText) findViewById(R.id.et_name);<span style="box-sizing: border-box;"></span>
        findViewById(R.id.btn_login).setOnClickListener(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> View.OnClickListener() {
            <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onClick</span>(View v) {<span style="box-sizing: border-box;"></span>
                String name = et_name.getText().toString();<span style="box-sizing: border-box;"></span>
                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (TextUtils.isEmpty(name)) {<span style="box-sizing: border-box;"></span>
                    Toast.makeText(LoginActivity.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"登入名不能為空"</span>, Toast.LENGTH_SHORT).show();
                    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span>;<span style="box-sizing: border-box;"></span>
                }<span style="box-sizing: border-box;"></span>
                login(name);<span style="box-sizing: border-box;"></span>
            }<span style="box-sizing: border-box;"></span>
        });<span style="box-sizing: border-box;"></span>
    }<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">login</span>(String name) {
          <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//使用name作為cliendID</span><span style="box-sizing: border-box;"></span>
        AVIMClient jerry = AVIMClient.getInstance(name);<span style="box-sizing: border-box;"></span>
        jerry.open(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> AVIMClientCallback() {<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
            <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">done</span>(AVIMClient client, AVIMException e) {
                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (e == <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {<span style="box-sizing: border-box;"></span>
                    Toast.makeText(LoginActivity.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"登入成功"</span>, Toast.LENGTH_SHORT).show();
                    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//儲存client</span><span style="box-sizing: border-box;"></span>
                    MyApp.mClient = client;<span style="box-sizing: border-box;"></span>
                    startActivity(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> Intent(LoginActivity.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>, MainActivity.class));<span style="box-sizing: border-box;"></span>
                } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {<span style="box-sizing: border-box;"></span>
                    Toast.makeText(LoginActivity.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"登入失敗:"</span> + e.getMessage(), Toast.LENGTH_SHORT).show();<span style="box-sizing: border-box;"></span>
                }<span style="box-sizing: border-box;"></span>
            }<span style="box-sizing: border-box;"></span>
        });<span style="box-sizing: border-box;"></span>
    }<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">3</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">4</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">五</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">6</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">7</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">8</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">9</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">10</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">11</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">12</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">13</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">14</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">15</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">16</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">17</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">18</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">19</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">20</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">21</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">22</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">23</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">24</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">25</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">26</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">27</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">28</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">29</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">三十</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">31</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">32</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">33</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">34</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">35</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">36</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">37</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">38</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">39</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">40</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">41</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">42</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">43</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">44</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">45</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">46</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">47</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">48</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">49</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">50</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">51</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">52</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">53</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">54</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">55</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">56</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">57</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">3</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">4</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">五</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">6</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">7</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">8</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">9</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">10</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">11</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">12</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">13</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">14</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">15</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">16</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">17</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">18</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">19</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">20</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">21</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">22</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">23</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">24</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">25</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">26</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">27</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">28</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">29</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">三十</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">31</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">32</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">33</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">34</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">35</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">36</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">37</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">38</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">39</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">40</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">41</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">42</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">43</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">44</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">45</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">46</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">47</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">48</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">49</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">50</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">51</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">52</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">53</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">54</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">55</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">56</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">57</span></li></ul>

第三步，進入聊天室

在進入直播介面的時候呼叫此方法，進入聊天室.conversationId應該從伺服器獲取，此處用於測試使用了一個固定的ID。

<code class="hljs java has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">join</span>() {<span style="box-sizing: border-box;"></span>
        MyApp.mClient.open(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> AVIMClientCallback() {<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
            <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">done</span>(AVIMClient client, AVIMException e) {
                <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (e == <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {
                    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//登入成功</span>
                    conv = client.getConversation(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"57d8b2445bbb50005e420535"</span>);<span style="box-sizing: border-box;"></span>
                    conv.join(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> AVIMConversationCallback() {
                        <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
                        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">done</span>(AVIMException e) {
                            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (e == <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) {
                                <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//加入成功</span>
                                Toast.makeText(MainActivity.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"加入聊天室成功"</span>, Toast.LENGTH_SHORT).show();<span style="box-sizing: border-box;"></span>
                                et_send.setEnabled(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">true</span>);<span style="box-sizing: border-box;"></span>
                            } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> {<span style="box-sizing: border-box;"></span>
                                Toast.makeText(MainActivity.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"加入聊天室失敗："</span> + e.getMessage(), Toast.LENGTH_SHORT).show();<span style="box-sizing: border-box;"></span>
                                et_send.setEnabled(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>);<span style="box-sizing: border-box;"></span>
                                android.util.Log.i(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"zzz"</span>, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"加入聊天室失敗 :"</span> + e.getMessage());<span style="box-sizing: border-box;"></span>
                            }<span style="box-sizing: border-box;"></span>
                        }<span style="box-sizing: border-box;"></span>
                    });<span style="box-sizing: border-box;"></span>
                }<span style="box-sizing: border-box;"></span>
            }<span style="box-sizing: border-box;"></span>
        });<span style="box-sizing: border-box;"></span>
    }</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">3</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">4</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">五</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">6</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">7</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">8</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">9</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">10</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">11</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">12</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">13</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">14</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">15</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">16</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">17</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">18</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">19</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">20</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">21</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">22</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">23</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">24</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">25</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">26</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">27</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">3</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">4</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">五</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">6</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">7</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">8</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">9</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">10</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">11</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">12</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">13</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">14</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">15</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">16</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">17</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">18</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">19</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">20</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">21</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">22</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">23</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">24</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">25</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">26</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">27</span></li></ul>

登入成功以後，在onResum的時候將此活動註冊為訊息處理者，在的onPause的時候取消註冊。而在應用程式的的onCreate的時候註冊一個預設的處理器，也就是說當APP在後頭執行的時候，通過預設處理器處理訊息，即彈出狀態列彈出通知，而在聊天介面由當前介面處理訊息。

<code class="hljs java has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">
    <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onResume</span>() {
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span>.onResume();<span style="box-sizing: border-box;"></span>
        AVIMMessageManager.registerMessageHandler(AVIMTextMessage.class, roomMessageHandler);<span style="box-sizing: border-box;"></span>
    }<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
    <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onPause</span>() {
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span>.onPause();<span style="box-sizing: border-box;"></span>
        AVIMMessageManager.unregisterMessageHandler(AVIMTextMessage.class, roomMessageHandler);<span style="box-sizing: border-box;"></span>
    }<span style="box-sizing: border-box;"></span>
</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">3</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">4</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">五</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">6</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">7</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">8</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">9</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">10</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">11</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">12</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">13</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">3</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">4</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">五</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">6</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">7</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">8</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">9</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">10</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">11</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">12</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">13</span></li></ul>

在接收到訊息以後把訊息顯示在彈幕控制元件上。

<code class="hljs java has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">RoomMessageHandler</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">extends</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">AVIMMessageHandler</span> {</span>
        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//接收到訊息後的處理邏輯</span>
        <span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;">@Override</span>
        <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">onMessage</span>(AVIMMessage message, AVIMConversation conversation, AVIMClient client) {
            <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (message <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">instanceof</span> AVIMTextMessage) {<span style="box-sizing: border-box;"></span>
                String info = ((AVIMTextMessage) message).getText();<span style="box-sizing: border-box;"></span>
                <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//新增訊息到螢幕</span><span style="box-sizing: border-box;"></span>
                addMsg(info);<span style="box-sizing: border-box;"></span>
            }<span style="box-sizing: border-box;"></span>
        }<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
    }<span style="box-sizing: border-box;"></span>
<span style="box-sizing: border-box;"></span>
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> <span class="hljs-title" style="box-sizing: border-box;">addMsg</span>(String msg) {<span style="box-sizing: border-box;"></span>
        TextView textView = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> TextView(MainActivity.<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>);<span style="box-sizing: border-box;"></span>
        textView.setText(msg);<span style="box-sizing: border-box;"></span>
        ViewGroup.MarginLayoutParams params = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> ViewGroup.MarginLayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);<span style="box-sizing: border-box;"></span>
        params.setMargins(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5</span>, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10</span>);<span style="box-sizing: border-box;"></span>
        textView.setLayoutParams(params);<span style="box-sizing: border-box;"></span>
        ll_room.addView(textView, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>);<span style="box-sizing: border-box;"></span>
        barrageView.addMessage(msg);<span style="box-sizing: border-box;"></span>
    }</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">3</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">4</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">五</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">6</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">7</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">8</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">9</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">10</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">11</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">12</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">13</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">14</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">15</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">16</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="box-sizing: border-box;">17</span></li><li style="box-sizing: border-box; padding: 0px 5px;