关于热修复框架nuwa的使用

from : http://blog.csdn.net/frank_andriod/article/details/51385221

最近看了几篇博文，大概的了解了一下热修复，关于原理，鸿洋有篇博客写的很好，基于QQ空间团队的思路，nuwa这个开源框架在github上的star稍多一点。然后我就试着把这个框架导入到我的项目中，模拟实现热修复。关于我用来模拟的工程（其实也是模仿鸿洋的一个自定义控件的项目），已经上传到github，下载地址附在文末.欢迎下载

1，在你工程的build.gradle中添加classpath,注意要修改你项目的gradle版本，改成“com.Android.tools.build:gradle:1.2.3”，因为版本要一致，不然会报错

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">dependencies {
classpath <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'com.android.tools.build:gradle:1.2.3'</span>
classpath <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'cn.jiajixin.nuwa:gradle:1.2.2'</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// NOTE: Do not place your application dependencies here; they belong</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// in the individual module build.gradle files</span>
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li></ul>

2，在你moduel的build.gradle添加插件，添加依赖，特别注意还要加上nuwa的那个部分

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//注意，这个要放在build的上方</span>
apply plugin: <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"cn.jiajixin.nuwa"</span>

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//添加依赖。</span>
compile <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'cn.jiajixin.nuwa:nuwa:1.0.0'</span>

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//添加渠道包</span>
productFlavors {
qihoo {
}
xiaomi {
}
}
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//添加nuwa部分，因为application是最新加载的，所以这里要做特殊处理，原因在鸿洋的博客中有写</span>
nuwa {
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//括号里是Application类以及要排除Application父类</span>
excludeClass = [<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'com/example/frank/mysticklayout/MyApplication.class'</span>]
}
</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li></ul>

3，写一个MyApplication继承自Application.并在里面对nuwa进行配置，除此之外要注意获取读写SD卡的权限，因为最后我们的jar是放在sd卡上的。

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//别忘记在manifest文件中进行注册</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);">MyApplication</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);">Application</span> {</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;">onCreate</span>() {
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span>.onCreate();

Nuwa.init(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>);
Nuwa.loadPatch(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">this</span>, Environment.getExternalStorageDirectory().getAbsolutePath().concat(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"/patch.jar"</span>));
}
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li></ul>

4，接下来就可以运行项目了，运行之后在D:\studiowork\MyStickLayout\app\build\outputs\nuwa（对应你的项目目录）中把nuwa文件夹拷贝出来（比如我放到了D盘的根目录下），因为之后要用到这个文件，这一步相当于是对原始文件做一个备份，这样才能与你修复了bug后的项目文件进行对比，知道哪些类被改动了，然后把对应的类打成jar包。

第一次运行的效果图

这个是第一次运行之后在项目中的nuwa文件夹，需要拷贝出来

5，接下来我们就要进行bug的修复工作了，比如我们增加了一个fixbug()方法，修改textview的文字

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><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;">initViews</span>() {
mIndicator = (SimpleViewPagerIndicator) findViewById(R.id.id_stickynavlayout_indicator);
mViewPager = (ViewPager) findViewById(R.id.id_stickynavlayout_viewpager);
mTextView = (TextView) findViewById(R.id.top_text);
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//在这里调用方法</span>
fixBug(<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"bug已经修复了"</span>);
}

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//增加的修复bug的方法。</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;">fixBug</span>(String text){
mTextView.setText(text);
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li></ul>

6，在Android studio的命令行输入如下命令，前面是渠道包，后面是你之前复制的nuwa文件夹的存放位置，只有知道了存放位置，才能对比，然后知道哪些类进行了修改

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">gradlew clean nuwaQihooDebugPatch -P NuwaDir=D:/nuwa</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

在Android studio 命令行窗口输入命令

7，接下来到项目D:\studiowork\MyStickLayout\app\build\outputs\nuwa\qihoo\debug中就能够找到生成的jar包，找到之后复制到SD卡中，（在实际项目中我们把jar包放到服务器，接着发一个推送消息，然后客户端去下载jar包，这样用户下次启动应用的时候bug就修复了）

找到jar包 



把jar包拷贝到Sd卡 



关闭应用后重启，bug已经修复了 

8，接下来我们用反编译工具来看看这个jar包里面有什么，网上下个jadx,然后把jar包拷贝到bean目录下，运行命令以下命令

<code class="language-java hljs  has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">jadx-gui patch.jar</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

可以看到jar里面就是我们修改了代码的MainActivity类.

我的demo下载地址

https://github.com/frankandroid/MyNuwaDemo

nuwa下载地址

https://github.com/jasonross/Nuwa

参考

http://blog.csdn.net/lmj623565791/article/details/49883661

http://blog.csdn.net/duanymin/article/details/50751391