线上的BUG一直是程序员头疼的问题。有时候仅仅是因为几行的代码，就能让你的用户损失严重。谷歌在Android Studio 加入了Insttan Run 机制。通过Apk动态加载的技术实现了应用非安装而进行代码层的改变。之后QQ空间团队的补丁开始了热更新的浪潮。用户不需要通过手动操作，进行App的版本更新，极大的保障了用户对于产品的粘合度，对于开发者而言能使用到这项技术当然再好不过，市面上的热更新，热修复他们的叫称不同，功能相同只是支持的范围有所差别。目前可用的开放平台有腾讯的Tinker以及HotFix。无奈腾讯需要收费，这里就介绍如何集成阿里的HotFix。并且一些踩坑的处理。
首先，你需要一个淘宝账号登陆阿里百川根据角色注册对应账号。之后申请一个App获得他的三个参数：APP ID，App Secret,RSA。这是我的个人测试账号，参数就给你们看啦。如下：
下载RSA到你的电脑。
接入应用：
使用Android Studio.在gradle 文件中添加如下：
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<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" cid="n10" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(248, 248, 248); position: relative !important; border: 1px solid rgb(231, 234, 237); border-radius: 3px; padding: 8px 4px 6px; margin-bottom: 15px; margin-top: 15px; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">allprojects {
maven {
url "http://repo.baichuan-android.taobao.com/content/groups/BaichuanRepositories"
}
}
}</pre>
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在moudle的gradle中添加如下：
<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" cid="n13" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(248, 248, 248); position: relative !important; border: 1px solid rgb(231, 234, 237); border-radius: 3px; padding: 8px 4px 6px; margin-bottom: 15px; margin-top: 15px; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">compile 'com.taobao.android:alisdk-hotfix:2.0.9'</pre>
在清单文件中添加权限：
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<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" cid="n16" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(248, 248, 248); position: relative !important; border: 1px solid rgb(231, 234, 237); border-radius: 3px; padding: 8px 4px 6px; margin-bottom: 15px; margin-top: 15px; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"><! -- 网络权限 -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<! -- 外部存储读权限 -->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/></pre>
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在Application中添加百川SDK的参数：
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<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" cid="n20" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(248, 248, 248); position: relative !important; border: 1px solid rgb(231, 234, 237); border-radius: 3px; padding: 8px 4px 6px; margin-bottom: 15px; margin-top: 15px; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"><meta-data
android:name="com.taobao.android.hotfix.IDSECRET"
android:value="App ID" />
<meta-data
android:name="com.taobao.android.hotfix.APPSECRET"
android:value="App Secret" />
<meta-data
android:name="com.taobao.android.hotfix.RSASECRET"
android:value="RSA密钥" /></pre>
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混淆：
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<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" cid="n24" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(248, 248, 248); position: relative !important; border: 1px solid rgb(231, 234, 237); border-radius: 3px; padding: 8px 4px 6px; margin-bottom: 15px; margin-top: 15px; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">#基线包使用，生成mapping.txt
-printmapping mapping.txt
生成的mapping.txt在app/buidl/outputs/mapping/release路径下，移动到/app路径下
修复后的项目使用，保证混淆结果一致
-applymapping mapping.txt
hotfix
-keep class com.taobao.sophix.{;}
-keep class com.ta.utdid2.device.{;}</pre>
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之后我们分别在Application中进行代码的初始化化，在onCreate()中优先请求百川补丁下载：
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<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" cid="n28" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(248, 248, 248); position: relative !important; border: 1px solid rgb(231, 234, 237); border-radius: 3px; padding: 8px 4px 6px; margin-bottom: 15px; margin-top: 15px; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">public void onCreate() {
super.onCreate();
initHotFix();
}
private void initHotFix() {
SophixManager.getInstance().queryAndLoadNewPatch();
}</pre>
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在attatchBaseContent中做补丁接收操作，这里的版本要和你后台生成的补丁包的版本一样：
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<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="" cid="n32" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9em; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(248, 248, 248); position: relative !important; border: 1px solid rgb(231, 234, 237); border-radius: 3px; padding: 8px 4px 6px; margin-bottom: 15px; margin-top: 15px; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"> SophixManager.getInstance().setContext(this)
.setAppVersion(appVerSion)
.setAesKey(null)
.setEnableDebug(true)
.setPatchLoadStatusStub(new PatchLoadStatusListener() {
@Override
public void onLoad(final int mode, final int code, final String info, final int handlePatchVersion) {
// // 补丁加载回调通知
// if (code == PatchStatus.CODE_LOAD_SUCCESS) {
// // 表明补丁加载成功
// Toast.makeText(MyApplication.this, "加载补丁成功", Toast.LENGTH_SHORT).show();
// } else if (code == PatchStatus.CODE_LOAD_RELAUNCH) {
// // 表明新补丁生效需要重启. 开发者可提示用户或者强制重启;
// // 建议: 用户可以监听进入后台事件, 然后应用自杀
// } else if (code == PatchStatus.CODE_LOAD_FAIL) {
// // 内部引擎异常, 推荐此时清空本地补丁, 防止失败补丁重复加载
// // SophixManager.getInstance().cleanPatches();
// } else {
// // 其它错误信息, 查看PatchStatus类说明
// }
}
}).initialize();</pre>
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对于新旧版本的补丁你需要在官网下载生成补丁的工具，之后再进行补丁包的上传。官方还有补丁的测试工具。把补丁上传之后发布就饿可以进行热更新了。下面我们来测试一下，我在我的界面的新版本中把三个banner隐藏了。并且进行打补丁。看看效果如何：
可以看到已经成功的应用了补丁。
