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<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title><![CDATA[Shaojie's Blog]]></title>
<link href="http://www.shaojie.name/atom.xml" rel="self"/>
<link href="http://www.shaojie.name/"/>
<updated>2016-01-06T22:47:00+08:00</updated>
<id>http://www.shaojie.name/</id>
<author>
<name><![CDATA[Shao jie]]></name>
</author>
<generator uri="http://octopress.org/">Octopress</generator>
<entry>
<title type="html"><![CDATA[不要做一个浮躁的程序员]]></title>
<link href="http://www.shaojie.name/blog/2014/05/05/chengxuyuan/"/>
<updated>2014-05-05T22:57:51+08:00</updated>
<id>http://www.shaojie.name/blog/2014/05/05/chengxuyuan</id>
<content type="html"><![CDATA[<ul>
<li><p>1.不要看到别人的回复第一句话就说：给个代码吧！你应该想想为什么。当你自己想出来再参考别人的提示，你就知道自己和别人思路的差异。</p></li>
<li><p>2.初学者请不要看太多太多的书那会误人子弟的，先找本系统的学，很多人用了很久都是只对部分功能熟悉而已，不系统还是不够的。</p></li>
<li><p>3.看帮助,不要因为很难而自己是初学者所以就不看；帮助永远是最好的参考手册，虽然帮助的文字有时候很难看懂，总觉得不够直观。</p></li>
<li><p>4.不要被对象、属性、方法等词汇所迷惑；最根本的是先了解最基础知识。</p></li>
<li><p>5.不要放过任何一个看上去很简单的小问题–他们往往并不那么简单，或者可以引伸出很多知识点；不会举一反三你就永远学不会。</p></li>
<li><p>6.知道一点东西，并不能说明你会写脚本，脚本是需要经验积累的。</p></li>
<li><p>7.学脚本并不难，JSP、ASP、PHP等等也不过如此–难的是长期坚持实践和不遗余力的博览群书；</p></li>
<li><p>8.看再多的书是学不全脚本的，要多实践。</p></li>
<li><p>9.把时髦的技术挂在嘴边，还不如把过时的技术记在心里；</p></li>
<li><p>10.学习脚本最好的方法之一就是多练习；</p></li>
<li><p>11.在任何时刻都不要认为自己手中的书已经足够了；</p></li>
<li><p>12.看得懂的书，请仔细看；看不懂的书，请硬着头皮看；</p></li>
<li><p>13.别指望看第一遍书就能记住和掌握什么——请看第二遍、第三遍；</p></li>
<li><p>14.请把书上的例子亲手到电脑上实践，即使配套光盘中有源文件；</p></li>
<li><p>15.把在书中看到的有意义的例子扩充；并将其切实的运用到自己的工作中；</p></li>
<li><p>16.不要漏掉书中任何一个练习——请全部做完并记录下思路；</p></li>
<li><p>17.当你用脚本到一半却发现自己用的方法很拙劣时，请不要马上停手；请尽快将余下的部分粗略的完成以保证这个代码的完整性，然后分析自己的错误并重新编写和工作。</p></li>
<li><p>18.别心急，写脚本确实不容易；水平是在不断的实践中完善和发展的；</p></li>
<li><p>19.每学到一个脚本难点的时候，尝试着对别人讲解这个知识点并让他理解—-你能讲清楚才说明你真的理解了；</p></li>
<li><p>20.记录下在和别人交流时发现的自己忽视或不理解的知识点；</p></li>
<li><p>21.保存好你做过的所有的源文件—-那是你最好的积累之一；</p></li>
<li><p>22.对于网络，还是希望大家能多利用一下，很多问题不是非要到论坛来问的，首先你要学会自己找答案，比如google、百度都是很好的搜索引擎，你只要输入关键字就能找到很多相关资料，别老是等待别人给你希望，看的出你平时一定也很懒！</p></li>
<li><p>23.到一个论坛，你学会去看以前的帖子，不要什么都不看就发帖子问，也许你的问题早就有人问过了，你再问，别人已经不想再重复了，做为初学者，谁也不希望自己的帖子没人回的。</p></li>
<li><p>24.虽然不是打击初学者，但是这句话还是要说：论坛论坛，就是大家讨论的地方，如果你总期望有高手总无偿指点你，除非他是你亲戚！！讨论者，起码是 水平相当的才有讨论的说法，如果水平真差距太远了，连基本操作都需要别人给解答，谁还跟你讨论呢。能找到很多相关资料，别老是等待别人给你希望，看的出你 平时一定也很懒！</p></li>
</ul>
<p><p></p>
<pre><code>浮躁的人容易问：我到底该学什么；—-别问，学就对了；
浮躁的人容易问：JS有钱途吗；—-建议你去抢银行；
浮躁的人容易说：我要中文版！我英文不行！—-不行？学呀！
浮躁的人分两种：只观望而不学的人；只学而不坚持的人；
浮躁的人永远不是一个高手。
</code></pre>
<p>来自互联网，共勉</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Cocoapods安装和使用]]></title>
<link href="http://www.shaojie.name/blog/2014/05/05/cocoapod/"/>
<updated>2014-05-05T22:44:04+08:00</updated>
<id>http://www.shaojie.name/blog/2014/05/05/cocoapod</id>
<content type="html"><![CDATA[<h4>CocoaPods是什么</h4>
<p>当你开发iOS应用时，会经常使用到很多第三方开源类库，比如JSONKit，AFNetWorking等等。可能某个类库又用到其他类库，所以要使用它，必须得另外下载其他类库，而其他类库又用到其他类库，“子子孙孙无穷尽也”，这也许是比较特殊的情况。总之小编的意思就是，手动一个个去下载所需类库十分麻烦。另外一种常见情况是，你项目中用到的类库有更新，你必须得重新下载新版本，重新加入到项目中，十分麻烦。如果能有什么工具能解决这些恼人的问题，那将“善莫大焉”。所以，你需要 CocoaPods。</p>
<p>CocoaPods应该是iOS最常用最有名的类库管理工具了，上述两个烦人的问题，通过cocoaPods，只需要一行命令就可以完全解决，当然前提是你必须正确设置它。重要的是，绝大部分有名的开源类库，都支持CocoaPods。所以，作为iOS程序员的我们，掌握CocoaPods的使用是必不可少的基本技能了</p>
<h4>如何下载和安装CocoaPods</h4>
<p>在安装CocoaPods之前，首先要在本地安装好Ruby环境</p>
<p>假如你在本地已经安装好Ruby环境，那么下载和安装CocoaPods将十分简单，只需要一行命令。在Terminator（也就是终端）中输入以下命令</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>sudo gem install cocoapods
</span><span class='line'>pod setup</span></code></pre></td></tr></table></div></figure>
<p>上面第二行执行时，会输出Setting up CocoaPods master repo，但是会等待比较久的时间。这步其实是Cocoapods在将它的信息下载到 ~/.cocoapods目录下，如果你等太久，可以试着cd到那个目录，用du -sh *来查看下载进度</p>
<p>如果你在终端中敲入这个命令之后，会发现半天没有任何反应,可以更新一下ruby的源：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>gem sources --remove https://rubygems.org/
</span><span class='line'>gem sources -a http://ruby.taobao.org/
</span><span class='line'>gem sources -l</span></code></pre></td></tr></table></div></figure>
<h4>如何使用CocoaPod</h4>
<ol>
<li>利用CocoaPods，在项目中导入AFNetworking类库
AFNetworking类库在GitHub地址是：<a href="https://github.com/AFNetworking/AFNetworking">https://github.com/AFNetworking/AFNetworking</a>
为了确定AFNetworking是否支持CocoaPods，可以用CocoaPods的搜索功能验证一下。在终端中输入：</li>
</ol>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>pod search AFNetWorking</span></code></pre></td></tr></table></div></figure>
<p>过几秒钟之后，你会在终端中看到关于AFNetworking类库的一些信息</p>
<p>“
–> AFNetworking (2.2.1)
A delightful iOS and OS X networking framework.
pod ‘AFNetworking’, ‘~> 2.2.1’
– Homepage: <a href="https://github.com/AFNetworking/AFNetworking">https://github.com/AFNetworking/AFNetworking</a>
– Source: <a href="https://github.com/AFNetworking/AFNetworking.git">https://github.com/AFNetworking/AFNetworking.git</a>
– Versions: 2.2.1, 2.2.0, 2.1.0, 2.0.3, 2.0.2, 2.0.1, 2.0.0-RC3, 2.0.0-RC2, 2.0.0-RC1, 2.0.0, 1.3.3, 1.3.2, 1.3.1, 1.3.0, 1.2.1, 1.2.0, 1.1.0, 1.0RC3, 1.0RC2, 1.0RC1, 1.0.1, 1.0, 0.9.2, 0.9.1, 0.9.0, 0.7.0, 0.5.1, 0.10.1, 0.10.0 [master repo]
– Sub specs:</p>
<pre><code> - AFNetworking/Serialization (2.2.1)
- AFNetworking/Security (2.2.1)
- AFNetworking/Reachability (2.2.1)
- AFNetworking/NSURLConnection (2.2.1)
- AFNetworking/NSURLSession (2.2.1)
- AFNetworking/UIKit (2.2.1)
</code></pre>
<p>“
这说明，AFNetworking是支持CocoaPods，所以我们可以利用CocoaPods将AFNetworking导入你的项目中。
先利用Xcode创建一个项目，在项目的目录下新建一个名为Podfile的文件</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>platform :ios, '7.0'
</span><span class='line'>pod "AFNetworking", "~> 2.2.0"</span></code></pre></td></tr></table></div></figure>
<p>这两句文字的意思是，当前AFNetworking支持的iOS最高版本是iOS 7.0, 要下载的AFNetworking版本是2.2.0。</p>
<p>这时候，你就可以利用CocoPods下载AFNetworking类库了。还是在终端中的当前项目目录下，运行以下命令：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>pod install</span></code></pre></td></tr></table></div></figure>
<p>运行完成后，使用CocoaPods生成的 .xcworkspace 文件来打开工程，而不是以前的 .xcodeproj 文件
每次更改了Podfile文件，你需要重新执行一次pod install命令</p>
<h4>.gitignore</h4>
<p>当你执行pod install之后，除了Podfile外，cocoapods还会生成一个名为Podfile.lock的文件，你不应该把这个文件加入到.gitignore中。因为Podfile.lock会锁定当前各依赖库的版本，之后如果多次执行pod install 不会更改版本，要pod update才会改Podfile.lock了。这样多人协作的时候，可以防止第三方库升级把程序搞挂</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[ios sqlite3使用]]></title>
<link href="http://www.shaojie.name/blog/2014/05/01/ios-sqlite/"/>
<updated>2014-05-01T00:20:18+08:00</updated>
<id>http://www.shaojie.name/blog/2014/05/01/ios-sqlite</id>
<content type="html"><![CDATA[<h5>iOS中使用</h5>
<p>在 iOS 中 sqlite3 库是一套纯 C 的接口，因此很方便地就可以在 obj-c 源码中无痕使用它
首先，需要在Frameworks中加入所需的库Library libsqlite3.0.dylib</p>
<p>这样可以导入头文件了</p>
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</pre></td><td class='code'><pre><code class=''><span class='line'>#import "ViewController.h"
</span><span class='line'>#import "sqlite3.h"
</span><span class='line'>#define kDatabaseName @"city.db"
</span><span class='line'>@interface ViewController (){
</span><span class='line'> sqlite3 * database;
</span><span class='line'>}
</span><span class='line'>@end</span></code></pre></td></tr></table></div></figure>
<h4>初始化数据库</h4>
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</pre></td><td class='code'><pre><code class=''><span class='line'>-(BOOL)initializeDb {
</span><span class='line'> NSLog(@"initializeDB");
</span><span class='line'> // look to see if DB is in known location (~/Documents/$DATABASE_FILE_NAME)
</span><span class='line'> //START:code.DatabaseShoppingList.findDocumentsDirectory
</span><span class='line'> NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
</span><span class='line'> NSString *documentFolderPath = [searchPaths objectAtIndex:0];
</span><span class='line'> //查看文件目录
</span><span class='line'> NSLog(@"%@", documentFolderPath);
</span><span class='line'> self.databaseFilePath = [documentFolderPath stringByAppendingPathComponent:@"city.db"];
</span><span class='line'>
</span><span class='line'> if(![[NSFileManager defaultManager] fileExistsAtPath:self.databaseFilePath]){
</span><span class='line'> //didnit find db, need to copy
</span><span class='line'> NSString *backupDbPath = [[NSBundle mainBundle] pathForResource:@"city" ofType:@"db"];
</span><span class='line'>
</span><span class='line'> if(backupDbPath == nil) {
</span><span class='line'> //couldn't find backup db to copy
</span><span class='line'> return NO;
</span><span class='line'> }else {
</span><span class='line'> BOOL copiedBackupDb = [[NSFileManager defaultManager] copyItemAtPath:backupDbPath toPath:self.databaseFilePath error:nil];
</span><span class='line'> if(!copiedBackupDb){
</span><span class='line'> return NO;
</span><span class='line'> }
</span><span class='line'> }
</span><span class='line'>
</span><span class='line'> }
</span><span class='line'> return TRUE;
</span><span class='line'>}</span></code></pre></td></tr></table></div></figure>
<h4>创建表</h4>
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</pre></td><td class='code'><pre><code class=''><span class='line'>-(BOOL) createTable{
</span><span class='line'> char *sql = "CREATE TABLE city (id integer primary key, cid integer, cityName text)";
</span><span class='line'> sqlite3_stmt *statment;
</span><span class='line'> char *errorMsg;
</span><span class='line'> if(sqlite3_exec(database, sql, NULL, NULL, &errorMsg) != SQLITE_OK){
</span><span class='line'> NSLog(@"Error: create table failed %s", sqlite3_errmsg(database));
</span><span class='line'> return NO;
</span><span class='line'> }
</span><span class='line'>
</span><span class='line'> int success = sqlite3_finalize(statment);
</span><span class='line'> if(success != SQLITE_DONE){
</span><span class='line'> NSLog(@"failed to dehydate: %s", sqlite3_errmsg(database));
</span><span class='line'> return NO;
</span><span class='line'> }
</span><span class='line'> return YES;
</span><span class='line'>}</span></code></pre></td></tr></table></div></figure>
<h4>向表中插入记录</h4>
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</pre></td><td class='code'><pre><code class=''><span class='line'>-(BOOL) insertOne{
</span><span class='line'> char *errorMsg;
</span><span class='line'> const char *sql = "insert into city (cid, cityName) values(101, '上海')";
</span><span class='line'> if(sqlite3_exec(database, sql, NULL, NULL, &errorMsg) == SQLITE_OK){
</span><span class='line'> NSLog(@"Insert ok");
</span><span class='line'> return YES;
</span><span class='line'> }else{
</span><span class='line'> NSLog(@"error: %s",errorMsg);
</span><span class='line'> sqlite3_free(errorMsg);
</span><span class='line'> return NO;
</span><span class='line'> }
</span><span class='line'>}</span></code></pre></td></tr></table></div></figure>
<h4>查询数据库</h4>
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</pre></td><td class='code'><pre><code class=''><span class='line'>-(void) showCitys{
</span><span class='line'> const char * sql = "select * from city";
</span><span class='line'> sqlite3_stmt *statment;
</span><span class='line'> if(sqlite3_prepare_v2(database, sql, -1, &statment, nil) == SQLITE_OK) {
</span><span class='line'> NSLog(@"select ok.");
</span><span class='line'> }
</span><span class='line'> while(sqlite3_step(statment) == SQLITE_ROW) {
</span><span class='line'> int id = sqlite3_column_int(statment, 1);
</span><span class='line'> //char *name = (char *) sqlite3_column_text(statment, 2);
</span><span class='line'> //直接用的char类型来中文会有乱码，使用NSString代替
</span><span class='line'> NSString *name=[[NSString alloc] initWithCString:(char *)sqlite3_column_text(statment , 2) encoding:NSUTF8StringEncoding];
</span><span class='line'> NSLog(@"row >>id %i, name %@", id, name);
</span><span class='line'> }
</span><span class='line'>
</span><span class='line'> sqlite3_finalize(statment);
</span><span class='line'>
</span><span class='line'>}</span></code></pre></td></tr></table></div></figure>
<h4>关闭数据库</h4>
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</pre></td><td class='code'><pre><code class=''><span class='line'>- (void)viewDidUnload {
</span><span class='line'>
</span><span class='line'> sqlite3_close(database);
</span><span class='line'>
</span><span class='line'>} </span></code></pre></td></tr></table></div></figure>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Android MVP 模式]]></title>
<link href="http://www.shaojie.name/blog/2014/03/24/android-mvp/"/>
<updated>2014-03-24T23:06:01+08:00</updated>
<id>http://www.shaojie.name/blog/2014/03/24/android-mvp</id>
<content type="html"><![CDATA[<h4>MVP模式与MVC模式</h4>
<p>MVP 是从经典的模式MVC演变而来，它们的基本思想有相通的地方：Controller/Presenter负责逻辑的处理，Model提供数据，View负责显示。作为一种新的模式，MVP与MVC有着一个重大的区别：在MVP中View并不直接使用Model，它们之间的通信是通过Presenter (MVC中的Controller)来进行的，所有的交互都发生在Presenter内部，而在MVC中View会从直接Model中读取数据而不是通过 Controller
<img src="http://img.hb.aicdn.com/c098e0b36a1be7bb989ca451e2f084d5758eb88b4e76-x3xslP_fw658" alt="" /></p>
<h4>什么是MVC(Model View Presenter)模式</h4>
<ol>
<li>为了使得视图接口可以与模型和控制器进行交互，控制器执行一些初始化事件</li>
<li>用户通过视图（用户接口）执行一些操作</li>
<li>控制器处理用户行为(可以用观察着模式实现)并通知模型进行更新</li>
<li>模型引发一些事件，以便将改变发告知视图</li>
<li>视图处理模型变更的事件，然后显示新的模型数据</li>
<li>用户接口等待用户的进一步操作</li>
</ol>
<h4>Example</h4>
<p>首先，我们先申明View的接口，有2个简单的方法</p>
<figure class='code'><figcaption><span>viewInterface </span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
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</pre></td><td class='code'><pre><code class='java'><span class='line'><span class="kd">public</span> <span class="n">inteface</span> <span class="n">IResultsView</span> <span class="o">{</span>
</span><span class='line'> <span class="c1">//set title</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">showTitle</span><span class="o">(</span><span class="n">String</span> <span class="n">title</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">//set result text</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">showResults</span><span class="o">(</span><span class="n">String</span> <span class="n">results</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span></code></pre></td></tr></table></div></figure>
<p>这些方法是说明我希望View中视图的变化，这里不关心它怎么发生的</p>
<p>然后再定义一个Presenter的接口</p>
<figure class='code'><figcaption><span>presenterInteface</span><a href='http://www.shaojie.name'>link</a></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
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</pre></td><td class='code'><pre><code class='java'><span class='line'><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">IResultsPresenter</span><span class="o">{</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">onResume</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span></code></pre></td></tr></table></div></figure>
<p>在视图里（Activity/Fragemnt）里onResume()触发的时候，调用Presenter。</p>
<figure class='code'><figcaption><span>presenterInteface</span><a href='http://www.shaojie.name'>link</a></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
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</pre></td><td class='code'><pre><code class='java'><span class='line'><span class="n">java</span> <span class="n">ResultsPreseter</span>
</span><span class='line'><span class="kd">public</span> <span class="kd">class</span> <span class="nc">ResultsPresenter</span> <span class="kd">implements</span> <span class="n">IResultsPresenter</span> <span class="o">{</span>
</span><span class='line'> <span class="kd">private</span> <span class="n">IResultsView</span> <span class="n">resultsView</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'> <span class="kd">public</span> <span class="nf">ResultsPresenter</span><span class="o">(</span><span class="n">IResultsView</span> <span class="n">resultsView</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'> <span class="k">this</span><span class="o">.</span><span class="na">resultsView</span> <span class="o">=</span> <span class="n">resultsView</span><span class="o">;</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">onResume</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// Get a title</span>
</span><span class='line'> <span class="n">getTitle</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'>
</span><span class='line'> <span class="c1">// Get results</span>
</span><span class='line'> <span class="n">getResults</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span></code></pre></td></tr></table></div></figure>
<p>这里，会触发IResultView里定义的2个函数</p>
<figure class='code'><figcaption><span>presenterInteface</span><a href='http://www.shaojie.name'>link</a></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
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</pre></td><td class='code'><pre><code class='java'><span class='line'><span class="kd">public</span> <span class="kd">class</span> <span class="nc">FragmentResults</span> <span class="kd">extends</span> <span class="n">Fragment</span> <span class="kd">implements</span> <span class="n">IResultsView</span> <span class="o">{</span>
</span><span class='line'> <span class="kd">private</span> <span class="n">View</span> <span class="n">view</span><span class="o">;</span>
</span><span class='line'> <span class="kd">private</span> <span class="n">TextView</span> <span class="n">title</span><span class="o">,</span> <span class="n">content</span><span class="o">;</span>
</span><span class='line'> <span class="kd">private</span> <span class="n">IResultsPresenter</span> <span class="n">presenter</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'> <span class="kd">public</span> <span class="nf">FragmentResults</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'> <span class="c1">// Required empty public constructor</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">public</span> <span class="n">View</span> <span class="nf">onCreateView</span><span class="o">(</span><span class="n">LayoutInflater</span> <span class="n">inflater</span><span class="o">,</span> <span class="n">ViewGroup</span> <span class="n">container</span><span class="o">,</span>
</span><span class='line'> <span class="n">Bundle</span> <span class="n">savedInstanceState</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'> <span class="n">view</span> <span class="o">=</span> <span class="n">inflater</span><span class="o">.</span><span class="na">inflate</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">layout</span><span class="o">.</span><span class="na">fragment_results</span><span class="o">,</span> <span class="kc">null</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'> <span class="k">return</span> <span class="n">view</span><span class="o">;</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">onViewCreated</span><span class="o">(</span><span class="n">View</span> <span class="n">view</span><span class="o">,</span> <span class="n">Bundle</span> <span class="n">savedInstanceState</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'> <span class="kd">super</span><span class="o">.</span><span class="na">onViewCreated</span><span class="o">(</span><span class="n">view</span><span class="o">,</span> <span class="n">savedInstanceState</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'> <span class="n">presenter</span> <span class="o">=</span> <span class="k">new</span> <span class="n">ResultsPresenter</span><span class="o">(</span><span class="k">this</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'> <span class="n">title</span> <span class="o">=</span> <span class="o">(</span><span class="n">TextView</span><span class="o">)</span> <span class="n">view</span><span class="o">.</span><span class="na">findViewById</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">id</span><span class="o">.</span><span class="na">results_title</span><span class="o">);</span>
</span><span class='line'> <span class="n">content</span> <span class="o">=</span> <span class="o">(</span><span class="n">TextView</span><span class="o">)</span> <span class="n">view</span><span class="o">.</span><span class="na">findViewById</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">id</span><span class="o">.</span><span class="na">results_text</span><span class="o">);</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">onResume</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'> <span class="kd">super</span><span class="o">.</span><span class="na">onResume</span><span class="o">();</span>
</span><span class='line'>
</span><span class='line'> <span class="n">presenter</span><span class="o">.</span><span class="na">onResume</span><span class="o">(</span><span class="n">getActivity</span><span class="o">());</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">showTitle</span><span class="o">(</span><span class="n">String</span> <span class="n">title</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>
</span><span class='line'> <span class="k">this</span><span class="o">.</span><span class="na">title</span><span class="o">.</span><span class="na">setText</span><span class="o">(</span><span class="n">title</span><span class="o">);</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">showResults</span><span class="o">(</span><span class="n">String</span> <span class="n">results</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>
</span><span class='line'> <span class="n">content</span><span class="o">.</span><span class="na">setText</span><span class="o">(</span><span class="n">results</span><span class="o">);</span>
</span><span class='line'> <span class="o">}</span>
</span></code></pre></td></tr></table></div></figure>
<p>很明显，我们就可以脱离用户接口来测试这些逻辑</p>
<figure class='code'><figcaption><span>presenterInteface</span><a href='http://www.shaojie.name'>link</a></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
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</pre></td><td class='code'><pre><code class='java'><span class='line'><span class="kd">public</span> <span class="kd">class</span> <span class="nc">TestResultsPresenter</span> <span class="kd">extends</span> <span class="n">AndroidTestCase</span> <span class="o">{</span>
</span><span class='line'> <span class="kd">private</span> <span class="n">IResultsPresenter</span> <span class="n">resultsPresenter</span><span class="o">;</span>
</span><span class='line'> <span class="kd">private</span> <span class="n">String</span> <span class="n">resultTitle</span><span class="o">;</span>
</span><span class='line'> <span class="kd">private</span> <span class="n">String</span> <span class="n">resultData</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'> <span class="kd">public</span> <span class="nf">TestResultsPresenter</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'> <span class="kd">super</span><span class="o">();</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">protected</span> <span class="kt">void</span> <span class="nf">setUp</span><span class="o">()</span> <span class="kd">throws</span> <span class="n">Exception</span> <span class="o">{</span>
</span><span class='line'> <span class="kd">super</span><span class="o">.</span><span class="na">setUp</span><span class="o">();</span>
</span><span class='line'>
</span><span class='line'> <span class="n">IResultsView</span> <span class="n">resultsView</span> <span class="o">=</span> <span class="k">new</span> <span class="n">TestResultsView</span><span class="o">();</span>
</span><span class='line'> <span class="n">resultsPresenter</span> <span class="o">=</span> <span class="k">new</span> <span class="n">ResultsPresenter</span><span class="o">(</span><span class="n">resultsView</span><span class="o">);</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">protected</span> <span class="kt">void</span> <span class="nf">tearDown</span><span class="o">()</span> <span class="kd">throws</span> <span class="n">Exception</span> <span class="o">{</span>
</span><span class='line'> <span class="kd">super</span><span class="o">.</span><span class="na">tearDown</span><span class="o">();</span>
</span><span class='line'> <span class="n">resultsPresenter</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">testResultFormat</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'> <span class="n">Utilities</span><span class="o">.</span><span class="na">SmsResultManager</span> <span class="n">smsResultManager</span> <span class="o">=</span> <span class="n">Utilities</span><span class="o">.</span><span class="na">SmsResultManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">(</span><span class="n">getContext</span><span class="o">());</span>
</span><span class='line'> <span class="n">smsResultManager</span><span class="o">.</span><span class="na">removeAllSmsResults</span><span class="o">();</span>
</span><span class='line'> <span class="n">smsResultManager</span><span class="o">.</span><span class="na">saveResult</span><span class="o">(</span><span class="s">"foo"</span><span class="o">,</span> <span class="k">new</span> <span class="n">SmsResult</span><span class="o">(</span><span class="s">"ark"</span><span class="o">,</span> <span class="s">"foo"</span><span class="o">));</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// Build expected Content</span>
</span><span class='line'> <span class="n">String</span> <span class="n">expectedContent</span> <span class="o">=</span> <span class="s">"ark\t\tfoo\t\tUnknown\n"</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'> <span class="n">resultsPresenter</span><span class="o">.</span><span class="na">onResume</span><span class="o">(</span><span class="n">getContext</span><span class="o">());</span>
</span><span class='line'>
</span><span class='line'> <span class="n">assertEquals</span><span class="o">(</span><span class="n">expectedContent</span><span class="o">,</span> <span class="n">resultData</span><span class="o">);</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">testResultTitle</span><span class="o">(){</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// put something</span>
</span><span class='line'> <span class="n">Date</span> <span class="n">nowDate</span> <span class="o">=</span> <span class="k">new</span> <span class="n">Date</span><span class="o">();</span>
</span><span class='line'> <span class="n">DateFormat</span> <span class="n">df</span> <span class="o">=</span> <span class="n">DateFormat</span><span class="o">.</span><span class="na">getDateTimeInstance</span><span class="o">(</span>
</span><span class='line'> <span class="n">DateFormat</span><span class="o">.</span><span class="na">SHORT</span><span class="o">,</span>
</span><span class='line'> <span class="n">DateFormat</span><span class="o">.</span><span class="na">SHORT</span><span class="o">,</span>
</span><span class='line'> <span class="n">Locale</span><span class="o">.</span><span class="na">getDefault</span><span class="o">());</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// Set date time in prefs</span>
</span><span class='line'> <span class="n">Preferences</span><span class="o">.</span><span class="na">writePreferenceValue</span><span class="o">(</span><span class="n">getContext</span><span class="o">(),</span>
</span><span class='line'> <span class="n">getContext</span><span class="o">().</span><span class="na">getString</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">string</span><span class="o">.</span><span class="na">pref_emergency_date_time_key</span><span class="o">),</span> <span class="n">nowDate</span><span class="o">.</span><span class="na">getTime</span><span class="o">());</span>
</span><span class='line'>
</span><span class='line'> <span class="n">String</span> <span class="n">formattedDateTime</span> <span class="o">=</span> <span class="n">df</span><span class="o">.</span><span class="na">format</span><span class="o">(</span><span class="n">nowDate</span><span class="o">);</span>
</span><span class='line'> <span class="n">String</span> <span class="n">expectedTitle</span> <span class="o">=</span> <span class="n">String</span><span class="o">.</span><span class="na">format</span><span class="o">(</span><span class="n">getContext</span><span class="o">().</span><span class="na">getString</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">string</span><span class="o">.</span><span class="na">results_title</span><span class="o">),</span>
</span><span class='line'> <span class="n">formattedDateTime</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// Trigger onResume event in Results Presenter</span>
</span><span class='line'> <span class="n">resultsPresenter</span><span class="o">.</span><span class="na">onResume</span><span class="o">(</span><span class="n">getContext</span><span class="o">());</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// Test not null</span>
</span><span class='line'> <span class="n">assertNotNull</span><span class="o">(</span><span class="n">resultTitle</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'> <span class="c1">// Test as expected</span>
</span><span class='line'> <span class="n">assertEquals</span><span class="o">(</span><span class="n">expectedTitle</span><span class="o">,</span> <span class="n">resultTitle</span><span class="o">);</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'>
</span><span class='line'> <span class="kd">private</span> <span class="kd">class</span> <span class="nc">TestResultsView</span> <span class="kd">implements</span> <span class="n">IResultsView</span> <span class="o">{</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">showTitle</span><span class="o">(</span><span class="n">String</span> <span class="n">title</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'> <span class="n">resultTitle</span> <span class="o">=</span> <span class="n">title</span><span class="o">;</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'>
</span><span class='line'> <span class="nd">@Override</span>
</span><span class='line'> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">showResults</span><span class="o">(</span><span class="n">String</span> <span class="n">results</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'> <span class="n">resultData</span> <span class="o">=</span> <span class="n">results</span><span class="o">;</span>
</span><span class='line'> <span class="o">}</span>
</span><span class='line'> <span class="o">}</span>
</span></code></pre></td></tr></table></div></figure>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[十四个很准的心里暗示]]></title>
<link href="http://www.shaojie.name/blog/2014/03/24/4/"/>
<updated>2014-03-24T23:05:55+08:00</updated>
<id>http://www.shaojie.name/blog/2014/03/24/4</id>
<content type="html"><![CDATA[<p>1、当你对某件事情抱着百分之一万的相信，它最后就会变成事实。</p>
<p>2、期望定律 期望定律告诉我们，当我们怀着对某件事情非常强烈期望的时候，我们所期望的事物就会出现。</p>
<p>3、情绪定律 情绪定律告诉我们，人百分之百是情绪化的。即使有人说某人很理性，其实当这个人很有”理性”地思考问题的时候，也是受到他当时情绪状态的影响，”理性地思考”本身也是一种情绪状态。所以人百分之百是情绪化的动物，而且任何时候的决定都是情绪化的决定。</p>
<p>4、因果定律 任何事情的发生，都有其必然的原因。有因才有果。换句话说，当你看到任何现象的时候，你不用觉得不可理解或者奇怪，因为任何事情的发生都必有其原因。你今天的现状结果是你过去种下的因导致的结果。</p>
<p>5、吸引定律 当你的思想专注在某一领域的时候，跟这个领域相关的人、事、物就会被你吸引而来。</p>
<p> 6、重复定律 任何的行为和思维，只要你不断的重复就会得到不断的加强。在你的潜意识当中，只要你能够不断地重复一些人、事、物，它们都会在潜意识里变成事实。</p>
<p> 7、累积定律 很多年轻人都曾梦想做一番大事业，其实天下并没有什么大事可做，有的只是小事。一件一件小事累积起来就形成了大事。任何大成就或者大灾难都是累积的结果。</p>
<p>8、辐射定律 当你做一件事情的时候，影响的并不只是这件事情的本身，它还会辐射到相关的其他领域。任何事情都有辐射作用。</p>
<p>9、相关定律 相关定律告诉我们：这个世界上的每一件事情之间都有一定的联系，没有一件事情是完全独立的。要解决某个难题最好从其他相关的某个地方人手，而不只是专注在一个困难点上。</p>
<p> 10、专精定律 专精定律告诉我们，只有专精在一个领域，这个领域才能有所发展。所以无论你做任何的行业都要把做该行业的最顶尖为目标，只有当你能够专精的时候，你所做的领域才会出类拔萃地成长。</p>
<p> 11、替换定律 替换定律就是说，当我们有一项不想要的记忆或者是负面的习惯，我们是无法完全去除掉，只能用一种新的记忆或新的习惯去替换他。</p>
<p> 12、惯性定律 任何事情只要你能够持续不断去加强它，它终究会变成一种习惯。</p>
<p>13、显现定律 显现定律就是说，当我们持续寻找、追问答案的时候，它们最终都必将显现。</p>
<p> 14、需求定律 任何人做任何事情都是带有一种需求。尊重并满足对方的需求，别人才会尊重我们的需求</p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Handy adb commands for Android]]></title>
<link href="http://www.shaojie.name/blog/2014/03/24/adb-commands-for-android/"/>
<updated>2014-03-24T23:05:52+08:00</updated>
<id>http://www.shaojie.name/blog/2014/03/24/adb-commands-for-android</id>
<content type="html"><![CDATA[<h4>查看连接的设备</h4>
<p>使用这个命令查看当前连接的所有设备和它们的ID</p>
<p><code>adb devices</code></p>
<p>如果你有多个设备连接，使用<code>adb -s DEVICE_ID</code>选中你需要操作的设备</p>
<h4>安装应用</h4>
<p>使用<code>install</code>命令安装apk，如果你已经安装过当前程序，并且想保存当前的数据，可以加上“-r“`参数来覆盖安装当前程序</p>
<p><code>
adb
</code>
记录下在使用android adb操作时常用的命令，可以方便我们在开发过程中构建和测试程序。</p>
<h4>卸载程序</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb uninstall PACKAGE_NAME
</span><span class='line'>//example
</span><span class='line'>adb uninstall com.shaojie.name.example</span></code></pre></td></tr></table></div></figure>
<h4>启动一个Activity</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb shell am start PACKAGE_NAME/ACTIVITY_IN_PACKAGE
</span><span class='line'>adb shell am start PACKAGE_NAME/FULLY_QUALIFIED_ACTIVITY
</span><span class='line'>//example
</span><span class='line'>adb shell am start -n com.shaojie.name.example/.MainActiivty
</span><span class='line'>adb shell am start -n com.shaojie.name.example/com.shaojie.name.MainActivity</span></code></pre></td></tr></table></div></figure>
<h4>进入设备的shell</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb shell</span></code></pre></td></tr></table></div></figure>
<h4>截屏</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb shell screencap -p | perl -pe 's/\x0D\x0A/\x0A/g' > screen.png</span></code></pre></td></tr></table></div></figure>
<h4>点击电源键</h4>
<p>这个命令发送一个关闭屏幕的事件到设备</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb shell input keyevent 26</span></code></pre></td></tr></table></div></figure>
<h4>屏幕解锁</h4>
<p>与上面的命令作用相反，用于点亮屏幕解锁</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb shell input keyevent 82</span></code></pre></td></tr></table></div></figure>
<h4>显示安装的程序包</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb shell pm list packages -f</span></code></pre></td></tr></table></div></figure>
<h4>Logging</h4>
<p>显示系统的日志到命令行</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb logcat</span></code></pre></td></tr></table></div></figure>
<h4>TagName过滤</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb logcat -s TAG_NAME
</span><span class='line'>adb logcat -s TAG_NAME_1 TAG_NAME_2
</span><span class='line'>//
</span><span class='line'>adb logcat -s TEST
</span><span class='line'>adb logcat -s TEST MYAPP</span></code></pre></td></tr></table></div></figure>
<h4>优先级过滤</h4>
<p>显示某个级别以及以上优先级的日志</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb logcat "*:PRIORITY"
</span><span class='line'>//example
</span><span class='line'>adb logcat "*:W"</span></code></pre></td></tr></table></div></figure>
<ul>
<li>V-Verbose</li>
<li>D_Debug</li>
<li>I-Info</li>
<li>W-Warning</li>
<li>E-Error</li>
<li>F-Fatal</li>
<li>S-Silent(最高级别)</li>
</ul>
<h4>优先级和tagname过滤</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb logcat -s TAG_NAME:PRIORITY
</span><span class='line'>adb logcat -s TAG_NAME_1:PRIORITY TAG_NAME_2:PROPRITY
</span><span class='line'>//example
</span><span class='line'>adb logcat -s TEST: W</span></code></pre></td></tr></table></div></figure>
<h4>grep过滤</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
<span class='line-number'>3</span>
<span class='line-number'>4</span>
<span class='line-number'>5</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb logcat | grep "SEARCH_TERM"
</span><span class='line'>adb logcat | grep "SEARCH_TERM_1\|SEARCH_TERM_2"
</span><span class='line'>//example
</span><span class='line'>adb logcat | grep "Exception"
</span><span class='line'>adb logcat | grep "Exveption\|Error"</span></code></pre></td></tr></table></div></figure>
<h4>清除logcat日志</h4>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>adb logcat -c</span></code></pre></td></tr></table></div></figure>
<h4>更多</h4>
<p>更加细节，当然是官方文档，<a href="http://developer.android.com/tools/help/adb.html">传送门</a></p>
]]></content>
</entry>
<entry>
<title type="html"><![CDATA[Android Asynchronous Loader]]></title>
<link href="http://www.shaojie.name/blog/2014/03/24/android-asynchronous-Loader/"/>
<updated>2014-03-24T23:05:43+08:00</updated>
<id>http://www.shaojie.name/blog/2014/03/24/android-asynchronous-Loader</id>
<content type="html"><![CDATA[<h4>Loader概述</h4>
<p>装载器从android3.0开始引进。它使得在activity或fragment中异步加载数据变得简单。装载器具有如下特性:</p>
<ul>
<li>它们对每个Activity和Fragment都有效</li>
<li>他们提供了异步加载数据的能力</li>
<li>它们监听数据，并在数数据发生变化时传递新的结果</li>
<li>当由于配置改变而被重新创建后，它们自动重连到上一个加载器的游标，所以不必重新查询数据</li>
</ul>
<h5>API概述</h5>
<h6>LoaderManager</h6>
<p>一个抽像类，关联到一个Activity或Fragment，管理一个或多个装载器的实例。这帮助一个应用管理那些与Activity或Fragment的生命周期相关的长时间运行的的操作。最常见的方式是与一个CursorLoader一起使用，然而应用是可以随便写它们自己的装载器以加载其它类型的数据。
每个activity或fragment只有一个LoaderManager。但是一个LoaderManager可以拥有多个装载器。</p>
<h6>LoadManager.LoaderCallbacks</h6>
<p>一个用于客户端与LoaderManager交互的回调接口。例如，你使用回调方法onCreateLoader()来创建一个新的装载器。</p>
<h6>Loader</h6>
<p>一个执行异步数据加载的抽象类。它是加载器的基类。你可以使用典型的CursorLoader，但是你也可以实现你自己的子类。一旦装载器被激活，它们将监视它们的数据源并且在数据改变时发送新的结果。</p>
<h6>AsyncTaskLoader</h6>
<p>提供一个AsyncTask来执行异步加载工作的抽象类。</p>
<h6>CursorLoader</h6>
<p>AsyncTaskLoader的子类，它查询ContentResolver然后返回一个Cursor。这个类为查询cursor以标准的方式实现了装载器的协议，它的游标查询是通过AsyncTaskLoader在后台线程中执行，从而不会阻塞界面。使用这个装载器是从一个ContentProvider异步加载数据的最好方式。相比之下，通过fragment或activity的API来执行一个被管理的查询就不行了</p>
<h5>使用</h5>
<p>一个使用装载器的应用会包含如下组件：</p>
<ul>
<li>一个Activity或Fragment</li>
<li>一个LoaderManager的实例</li>
<li>一个加载被ContentProvider所支持的数据的CursorLoader．或者，你可以从Loader或AsyncTaskLoader实现你自己的装载器来从其它源加载数据</li>
<li>一个LoaderManager.LoaderCallbacks的实现．这是你创建新的装载器以及管理你的已有装载器的引用的地方</li>
<li>一个显示装载器的数据的途径，例如使用一个SimpleCursorAdapter</li>
<li>一个数据源，比如当是用CursorLoader时，它将是一个ContentProvider</li>
</ul>
<h5>启动一个装载器</h5>
<p>LoaderManager管理一个Activiry或Fragment中的一个或多个装载器．但每个activity或fragment只拥有一个LoaderManager．</p>
<p>你通常要在activity的onCreate()方法中或fragment的onActivityCreated()方法中初始化一个装载器．你可以如下创建：</p>
<figure class='code'><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
</pre></td><td class='code'><pre><code class=''><span class='line'>getLoaderManager().initLoader(0,null, this); </span></code></pre></td></tr></table></div></figure>
<p>initLoader()方法有一下参数</p>
<ul>
<li>一个唯一ID来标志装载器．在这个例子中，ID是0</li>
<li>可选的参数，用于装载器初始化时(本例中是null)</li>
<li>一个LoaderManager.LoaderCallbacks的实现．被LoaderManager调用以报告装载器的事件，在这个例子中，类本实现了这个接口，所以传的是它自己：this</li>
</ul>
<p>initLoader()保证一个装载器被初始化并激活．它具有两种可能的结果：</p>
<ul>