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<a href="/tags/65K/" style="font-size: 10px;">65K</a> <a href="/tags/Android/" style="font-size: 15px;">Android</a> <a href="/tags/DataBinding/" style="font-size: 10px;">DataBinding</a> <a href="/tags/GreenDao/" style="font-size: 10px;">GreenDao</a> <a href="/tags/Gson/" style="font-size: 10px;">Gson</a> <a href="/tags/HTML/" style="font-size: 10px;">HTML</a> <a href="/tags/Homebrew/" style="font-size: 10px;">Homebrew</a> <a href="/tags/JS/" style="font-size: 10px;">JS</a> <a href="/tags/Java/" style="font-size: 10px;">Java</a> <a href="/tags/MQTT/" style="font-size: 10px;">MQTT</a> <a href="/tags/MVVM/" style="font-size: 10px;">MVVM</a> <a href="/tags/Multidex/" style="font-size: 10px;">Multidex</a> <a href="/tags/RxJava/" style="font-size: 10px;">RxJava</a> <a href="/tags/RxMqtt/" style="font-size: 10px;">RxMqtt</a> <a href="/tags/Spring-MVC/" style="font-size: 10px;">Spring MVC</a> <a href="/tags/VPS/" style="font-size: 10px;">VPS</a> <a href="/tags/WinRT/" style="font-size: 15px;">WinRT</a> <a href="/tags/Xcode/" style="font-size: 10px;">Xcode</a> <a href="/tags/Yosemite/" style="font-size: 10px;">Yosemite</a> <a href="/tags/安全/" style="font-size: 10px;">安全</a> <a href="/tags/日常/" style="font-size: 20px;">日常</a> <a href="/tags/视差滚动/" style="font-size: 10px;">视差滚动</a> <a href="/tags/设计/" style="font-size: 15px;">设计</a> <a href="/tags/软工/" style="font-size: 10px;">软工</a> <a href="/tags/音乐/" style="font-size: 10px;">音乐</a>
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<h1 class="title"><a href="/2016/03/07/introducing-droiddata/">Introducing DroidData (Preliminary)</a></h1>
<time datetime="2016-03-07T07:34:24.000Z"><a href="/2016/03/07/introducing-droiddata/">2016-03-07</a></time>
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<p>There are already lots of discussions about the architecture of a quality android application, such as <a href="https://github.com/pedrovgs/EffectiveAndroidUI/">EffectiveAndroidUI</a>, <a href="http://fernandocejas.com/2014/09/03/architecting-android-the-clean-way/">Android-CleanArchitecture</a>, which use some common patterns like MVC, MVP or MVVM. However, what we are going to talk about in this post is not which one of these architectures is the best, but some kind solution while implementing these architectures.</p>
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<h1 class="title"><a href="/2014/11/12/list-all-classes-after-multidex/">List All Classes after Multidex</a></h1>
<time datetime="2014-11-12T11:02:29.000Z"><a href="/2014/11/12/list-all-classes-after-multidex/">2014-11-12</a></time>
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<h2 id="Intro"><a href="#Intro" class="headerlink" title="Intro"></a>Intro</h2><p>Google recently posted an <a href="http://developer.android.com/tools/building/multidex.html">article</a> to solve the <code>65K Reference Limit</code> problem.<br>It is such a relief that we will not need to worry about the following errors any more.</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">Conversion to Dalvik format failed:</span><br><span class="line">Unable to execute dex: method ID not in [<span class="number">0</span>, <span class="number">0xffff</span>]: <span class="number">65536</span></span><br><span class="line"><span class="comment">//--or--</span></span><br><span class="line">trouble writing output:</span><br><span class="line">Too many field references: <span class="number">131000</span>; max is <span class="number">65536</span>.</span><br><span class="line">You may <span class="keyword">try</span> using --multi-dex option.</span><br></pre></td></tr></table></figure>
<h2 id="Problem"><a href="#Problem" class="headerlink" title="Problem"></a>Problem</h2><p>After configuring multidex in the module, some projects may encounter the loss of part of the the classes when using reflection to list all the classes in the apk.<br>The usual code may like this:</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//get the apk path</span></span><br><span class="line">String path = context.getPackageManager().getApplicationInfo(context.getPackageName(), <span class="number">0</span>).sourceDir;</span><br><span class="line"><span class="comment">//use DexFile the unzip the apk, find the *classes.dex* in the apk</span></span><br><span class="line">DexFile dexfile = <span class="keyword">new</span> DexFile(path);</span><br><span class="line"><span class="comment">//get all the classes in this dex</span></span><br><span class="line">Enumeration<String> dexEntries = dexfile.entries();</span><br><span class="line"><span class="keyword">while</span> (dexEntries.hasMoreElements()) {</span><br><span class="line"> classNames.add(dexEntries.nextElement());</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<h1 class="title"><a href="/2014/10/21/good-music-awsome/">令人惊叹的电音</a></h1>
<time datetime="2014-10-21T10:50:28.000Z"><a href="/2014/10/21/good-music-awsome/">2014-10-21</a></time>
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<blockquote><p>不是摇滚，而是电音。<br>不是躁杂，而是节奏。<br>生命和心脏一起律动，<br>思维完全沉浸入音乐中，<br>是未来，是科学，是电子，是光，是电，是宇宙的文明在歌唱。</p>
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<p>闹了好久的音乐荒，今天终于发现了新大陆。</p>
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<h1 class="title"><a href="/2014/10/18/fix-package-with-Yosemite-update/">Yosemite：安装和修复开发环境</a></h1>
<time datetime="2014-10-18T03:10:52.000Z"><a href="/2014/10/18/fix-package-with-Yosemite-update/">2014-10-18</a></time>
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<p>OS X Yosemite昨天如期而至，更新自不待说。有了上次升级OS X Yosemite Beta失败的经验，这次在按下那个大大的<code>继续</code>之前，先用Time Machine做了一个备份。</p>
<p>等待的过程尤其漫长，论坛上看到很多人都卡在<a href="http://www.v2ex.com/t/139538">大约剩余2分钟</a>。我倒是没有出现这种情况，我只是卡在<a href="http://www.v2ex.com/t/139538">大约剩余1分钟</a>而已(._.)。在安装界面使用<code>CMD</code>+<code>L</code>可以看到系统在不断拷贝<code>texlive</code>的文件，也算是蛮拼的了。</p>
<p>大约一个半小时后，锵锵，全新的OS X长这样。 </p>
<p><img src="/2014/10/18/fix-package-with-Yosemite-update/osx.jpg" alt="OS X Yosemite"></p>
<p>然后就是修复我的开发环境，毕竟还要靠它赚钱吃饭呐。</p>
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<h1 class="title"><a href="/2014/10/15/securing-vps-with-iptables/">Bandwagon 被黑小记</a></h1>
<time datetime="2014-10-15T14:33:02.000Z"><a href="/2014/10/15/securing-vps-with-iptables/">2014-10-15</a></time>
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<p>最近使用Azure和Bandwagon搭建了一个APNP梯子，顺畅无比。可惜好景不长，昨天下午突然就不能用了，心想不会那么快没流量吧。结果登上KiviVM一看，我的VPS居然被Suspend了，原因是Spam Email，顿时感到不妙，花了个擦，我的小梯子居然成了肉鸡？</p>
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<h1 class="title"><a href="/2014/08/13/parallax-scrolling-start/">视差滚动：初探</a></h1>
<time datetime="2014-08-13T10:21:00.000Z"><a href="/2014/08/13/parallax-scrolling-start/">2014-08-13</a></time>
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<p><a href="http://en.wikipedia.org/wiki/Parallax_scrolling#Parallax_scrolling_in_Web_design" target="_blank" rel="external">视差滚动</a>已经火了很久了，但一直没有空去尝试。</p>
<p>下面是利用<code>$(window).scroll</code>来控制<code>div</code>位置的尝试，重点在于各种高度的计算。</p>
<iframe scrolling="no" width="100%" height="300" src="http://jsfiddle.net/n3e50sze/embedded/result,js,html,css/light" frameborder="0" allowfullscreen></iframe>
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<h1 class="title"><a href="/2014/07/21/rxmqtt-rxjava-with-mqtt/">RxMqtt：Reactive Extensions for the Mqtt</a></h1>
<time datetime="2014-07-21T06:30:48.000Z"><a href="/2014/07/21/rxmqtt-rxjava-with-mqtt/">2014-07-21</a></time>
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<h1 class="title"><a href="/2014/07/14/gson-with-spring-mvc/">Gson在Spring MVC中的使用</a></h1>
<time datetime="2014-07-14T11:14:13.000Z"><a href="/2014/07/14/gson-with-spring-mvc/">2014-07-14</a></time>
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<p>最近在用Spring MVC搭建一套Restful API，整个过程的最后一步就是数据序列化。Spring MVC默认使用<a href="http://jackson.codehaus.org">Jackson</a>，但在使用过程中并不如想象中的顺手。因而尝试转向<a href="https://code.google.com/p/google-gson/">Gson</a>。</p>
<p>Gson是Google出品的用来进行Java Object和JSON转换的类库。有人曾对Gson和Jackson的性能做过<a href="http://tuhrig.de/jaxb-vs-gson-and-jackson/">比较</a>，Gson在读取和写入方面的速度都要逊于Jackson。不过现前并不需要在性能上作过多要求，容易上手和提高开发效率才是这个项目的重中之重。</p>
<h1 id="基本"><a href="#基本" class="headerlink" title="基本"></a>基本</h1><p>使用Gson来反序列化JSON十分简单，如下：</p>
<figure class="highlight java"><figcaption><span>User</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">User</span></span>{</span><br><span class="line"> <span class="keyword">private</span> String name;</span><br><span class="line"> <span class="keyword">private</span> String password;</span><br><span class="line"></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="title">User</span><span class="params">(String name, String password)</span></span>{...}</span><br><span class="line"> ...</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<figure class="highlight java"><figcaption><span>Gson反序列化User</span></figcaption><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">Gson gson = <span class="keyword">new</span> Gson();</span><br><span class="line">gson.toJson(<span class="keyword">new</span> User(<span class="string">"hello"</span>, <span class="string">"world"</span>), User.class);</span><br><span class="line"></span><br><span class="line"><span class="comment">// Result:</span></span><br><span class="line"><span class="comment">// {"name": "hello", "password": "world"}</span></span><br></pre></td></tr></table></figure>
<p>但Gson的优点不仅仅在于这点，而是在自定义序列化方面。<br>
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<h1 class="title"><a href="/2013/06/08/why-are-button-list-the-basic-ui-control/">[知乎]答：为什么现在的 GUI 设计仍跳不出 button、list、icon，没有这些元素的 GUI 会是什么样子？</a></h1>
<time datetime="2013-06-07T16:48:00.000Z"><a href="/2013/06/08/why-are-button-list-the-basic-ui-control/">2013-06-08</a></time>
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<p>此为知乎上的一个提问，<a href="http://www.zhihu.com/question/20269253">原文在这里</a>。</p>
<p>button,list等作为一些基础控件，从较高的层面讲，他们阐释了<strong>基本的交互语言，从而实现界面交互</strong>；就像在研究素描时，大多也就可以由三角形、圆形、矩形等构成（图一）。</p>
<p><img src="/2013/06/08/why-are-button-list-the-basic-ui-control/sketch.jpg" alt="图一：素描"></p>
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<time datetime="2013-04-19T02:12:00.000Z"><a href="/2013/04/19/se-api-define/">2013-04-19</a></time>
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<p>软件工程课程项目API</p>
<p>为了进行更好的分工合作，将API罗列如下…</p>
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