Android插件实例——360 DroidPlugin详解
jopen
8年前
在中国找到钱不难，但你的一个点子不意味着是一个创业。你谈一个再好的想法，比如我今天谈一个创意说，新浪为什么不收购GOOGLE呢？这个创意很好。新浪一收购GOOGLE，是不是新浪就变成老大了？你从哪儿弄来钱？怎么去整合GOOGLE呢；
之前写过有关于Android 插件方向的文章，解析了一下Android的插件原理与运行方式。很多小伙伴都问我，为什么不把我制作的插件放到Github上，让大家共享一下。
我只能说，大哥啊，这个插件是我在公司研发的时候制作的，商业机密，不能开源啊。
刚好，最近逛github的时候，看到了奇虎360手机助手团队的一个Android插件开源项目。今天，我们就具体的分析一下它的原理与实现逻辑。让大家更清楚的了解，一个Android插件的构造。
360 Android 插件项目 DroidPlugin
这个框架是奇虎360手机助手团队，最近在github上开源出来的Android插件框架。这种精神是很值得鼓励的。
github地址为： https://github.com/Qihoo360/DroidPlugin
好，一下纯属引入了官方的说明：
说明
DroidPlugin是360手机助手在Android系统上实现了一种新的插件机制:
它可以在无需安装、修改的情况下运行APK文件,此机制对改进大型APP的架构，实现多团队协作开发具有一定的好处。
特点
支持Androd 2.3以上系统
插件APK完全不需做任何修改，可以独立安装运行、也可以做插件运行。要以插件模式运行某个APK，你无需重新编译、无需知道其源码。
插件的四大组件完全不需要在Host程序中注册，支持Service、Activity、BroadcastReceiver、ContentProvider四大组件
插件之间、Host程序与插件之间会互相认为对方已经”安装”在系统上了。
API低侵入性：极少的API。HOST程序只是需要一行代码即可集成Droid Plugin
超强隔离：插件之间、插件与Host之间完全的代码级别的隔离：不能互相调用对方的代码。通讯只能使用Android系统级别的通讯方法。
支持所有系统API 资源完全隔离：插件之间、与Host之间实现了资源完全隔离，不会出现资源窜用的情况。
实现了进程管理，插件的空进程会被及时回收，占用内存低。
插件的静态广播会被当作动态处理，如果插件没有运行（即没有插件进程运行），其静态广播也永远不回被触发。
那么这个插件框架，和我们之前所说的插件框架，有什么特点？它的实现方式是什么样的？这里我们从源码来分析一下。
插件原理——DexClassLoader
之前，我们也讨论过，一个Android的apk插件是个什么形式。主要是三点，我总结如下：
- DexLoader动态的加载dex文件进入vm
- AndroidManifest.xml中预注册一些将要使用的四大组件（方法很low，其实有更好的）
- 针对四大组件，分别进行抽象代理，proxy
- Apk安装还需要单独处理native的,so文件。
- 宿主需要处理好Resource，保证R文件的正确使用。
360这个Android插件系统是否和我们之前讨论的类似呢？这里我们从IPluginManagerImpl.java文件中，我们能够看到其真正的安装apk插件的方法——installPackage。具体方法详解如下所示：
<code class="hljs java 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-javadoc" style="color: rgb(136, 0, 0); box-sizing: border-box;">/** *<span class="hljs-javadoctag" style="color: rgb(102, 0, 102); box-sizing: border-box;"> @param</span> filepath 插件Apk的路径 *<span class="hljs-javadoctag" style="color: rgb(102, 0, 102); box-sizing: border-box;"> @param</span> flags Flag * */</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;">int</span> <span class="hljs-title" style="box-sizing: border-box;">installPackage</span>(String filepath, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> flags) <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">throws</span> RemoteException { <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//install plugin</span> String apkfile = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>; <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> { <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 验证合法性</span> PackageManager pm = mContext.getPackageManager(); PackageInfo info = pm.getPackageArchiveInfo(filepath, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (info == <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> PackageManagerCompat.INSTALL_FAILED_INVALID_APK; } apkfile = PluginDirHelper.getPluginApkFile(mContext, info.packageName); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> ((flags & PackageManagerCompat.INSTALL_REPLACE_EXISTING) != <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) { <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 新安装的插件</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 停止，删除插件的缓存</span> forceStopPackage(info.packageName); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (mPluginCache.containsKey(info.packageName)) { deleteApplicationCacheFiles(info.packageName, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>); } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(apkfile).delete(); Utils.copyFile(filepath, apkfile); PluginPackageParser parser = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> PluginPackageParser(mContext, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(apkfile)); parser.collectCertificates(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>); PackageInfo pkgInfo = parser.getPackageInfo(PackageManager.GET_PERMISSIONS | PackageManager.GET_SIGNATURES); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 验证申请的permission，宿主中是否存在，不存在不让安装。</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (pkgInfo != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span> && pkgInfo.requestedPermissions != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span> && pkgInfo.requestedPermissions.length > <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span> (String requestedPermission : pkgInfo.requestedPermissions) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> b = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>; <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> { b = pm.getPermissionInfo(requestedPermission, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>; } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (NameNotFoundException e) { } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!mHostRequestedPermission.contains(requestedPermission) && b) { Log.e(TAG, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"No Permission %s"</span>, requestedPermission); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(apkfile).delete(); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> PluginManager.INSTALL_FAILED_NO_REQUESTEDPERMISSION; } } } <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 保存签名</span> saveSignatures(pkgInfo); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// if (pkgInfo.reqFeatures != null && pkgInfo.reqFeatures.length > 0) {</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// for (FeatureInfo reqFeature : pkgInfo.reqFeatures) {</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Log.e(TAG, "reqFeature name=%s,flags=%s,glesVersion=%s", reqFeature.name, reqFeature.flags, reqFeature.getGlEsVersion());</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// }</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// }</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 拷贝插件中的native库文件。</span> copyNativeLibs(mContext, apkfile, parser.getApplicationInfo(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>)); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// opt Dex文件，并使用DexClassLoader动态的载入类代码。</span> dexOpt(mContext, apkfile, parser); mPluginCache.put(parser.getPackageName(), parser); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 回调函数，通知插件安装</span> mActivityManagerService.onPkgInstalled(mPluginCache, parser, parser.getPackageName()); sendInstalledBroadcast(info.packageName); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> PackageManagerCompat.INSTALL_SUCCEEDED; } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> { <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 以下是插件，覆盖安装的过程。即更新的过程。与新安装类似。不做解释了。</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (mPluginCache.containsKey(info.packageName)) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> PackageManagerCompat.INSTALL_FAILED_ALREADY_EXISTS; } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">else</span> { forceStopPackage(info.packageName); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(apkfile).delete(); Utils.copyFile(filepath, apkfile); PluginPackageParser parser = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> PluginPackageParser(mContext, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(apkfile)); parser.collectCertificates(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>); PackageInfo pkgInfo = parser.getPackageInfo(PackageManager.GET_PERMISSIONS | PackageManager.GET_SIGNATURES); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (pkgInfo != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span> && pkgInfo.requestedPermissions != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span> && pkgInfo.requestedPermissions.length > <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span> (String requestedPermission : pkgInfo.requestedPermissions) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">boolean</span> b = <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">false</span>; <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> { b = pm.getPermissionInfo(requestedPermission, <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>) != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>; } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (NameNotFoundException e) { } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!mHostRequestedPermission.contains(requestedPermission) && b) { Log.e(TAG, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"No Permission %s"</span>, requestedPermission); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(apkfile).delete(); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> PluginManager.INSTALL_FAILED_NO_REQUESTEDPERMISSION; } } } saveSignatures(pkgInfo); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// if (pkgInfo.reqFeatures != null && pkgInfo.reqFeatures.length > 0) {</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// for (FeatureInfo reqFeature : pkgInfo.reqFeatures) {</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Log.e(TAG, "reqFeature name=%s,flags=%s,glesVersion=%s", reqFeature.name, reqFeature.flags, reqFeature.getGlEsVersion());</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// }</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// }</span> copyNativeLibs(mContext, apkfile, parser.getApplicationInfo(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>)); dexOpt(mContext, apkfile, parser); mPluginCache.put(parser.getPackageName(), parser); mActivityManagerService.onPkgInstalled(mPluginCache, parser, parser.getPackageName()); sendInstalledBroadcast(info.packageName); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> PackageManagerCompat.INSTALL_SUCCEEDED; } } } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">catch</span> (Exception e) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (apkfile != <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">null</span>) { <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> File(apkfile).delete(); } handleException(e); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> PackageManagerCompat.INSTALL_FAILED_INTERNAL_ERROR; } }</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); 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padding: 0px 5px;">67</li><li style="box-sizing: border-box; padding: 0px 5px;">68</li><li style="box-sizing: border-box; padding: 0px 5px;">69</li><li style="box-sizing: border-box; padding: 0px 5px;">70</li><li style="box-sizing: border-box; padding: 0px 5px;">71</li><li style="box-sizing: border-box; padding: 0px 5px;">72</li><li style="box-sizing: border-box; padding: 0px 5px;">73</li><li style="box-sizing: border-box; padding: 0px 5px;">74</li><li style="box-sizing: border-box; padding: 0px 5px;">75</li><li style="box-sizing: border-box; padding: 0px 5px;">76</li><li style="box-sizing: border-box; padding: 0px 5px;">77</li><li style="box-sizing: border-box; padding: 0px 5px;">78</li><li style="box-sizing: border-box; padding: 0px 5px;">79</li><li style="box-sizing: border-box; padding: 0px 5px;">80</li><li style="box-sizing: border-box; padding: 0px 5px;">81</li><li style="box-sizing: border-box; padding: 0px 5px;">82</li><li style="box-sizing: border-box; padding: 0px 5px;">83</li><li style="box-sizing: border-box; padding: 0px 5px;">84</li><li style="box-sizing: border-box; padding: 0px 5px;">85</li><li style="box-sizing: border-box; padding: 0px 5px;">86</li><li style="box-sizing: border-box; padding: 0px 5px;">87</li><li style="box-sizing: border-box; padding: 0px 5px;">88</li><li style="box-sizing: border-box; padding: 0px 5px;">89</li><li style="box-sizing: border-box; padding: 0px 5px;">90</li><li style="box-sizing: border-box; padding: 0px 5px;">91</li><li style="box-sizing: border-box; padding: 0px 5px;">92</li><li style="box-sizing: border-box; padding: 0px 5px;">93</li><li style="box-sizing: border-box; padding: 0px 5px;">94</li><li style="box-sizing: border-box; padding: 0px 5px;">95</li><li style="box-sizing: border-box; padding: 0px 5px;">96</li><li style="box-sizing: border-box; padding: 0px 5px;">97</li><li style="box-sizing: border-box; padding: 0px 5px;">98</li><li style="box-sizing: border-box; padding: 0px 5px;">99</li><li style="box-sizing: border-box; padding: 0px 5px;">100</li><li style="box-sizing: border-box; padding: 0px 5px;">101</li><li style="box-sizing: border-box; padding: 0px 5px;">102</li><li style="box-sizing: border-box; padding: 0px 5px;">103</li><li style="box-sizing: border-box; padding: 0px 5px;">104</li><li style="box-sizing: border-box; padding: 0px 5px;">105</li><li style="box-sizing: border-box; padding: 0px 5px;">106</li><li style="box-sizing: border-box; padding: 0px 5px;">107</li><li style="box-sizing: border-box; padding: 0px 5px;">108</li><li style="box-sizing: border-box; padding: 0px 5px;">109</li><li style="box-sizing: border-box; padding: 0px 5px;">110</li><li style="box-sizing: border-box; padding: 0px 5px;">111</li><li style="box-sizing: border-box; padding: 0px 5px;">112</li><li style="box-sizing: border-box; padding: 0px 5px;">113</li><li style="box-sizing: border-box; padding: 0px 5px;">114</li><li style="box-sizing: border-box; padding: 0px 5px;">115</li><li style="box-sizing: border-box; padding: 0px 5px;">116</li></ul> 以下是dexOpt方法的具体内容，简单的贴一下，不做说明了。
<code class="hljs avrasm 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;"> private void dexOpt(Context hostContext, String apkfile, PluginPackageParser parser) throws Exception { String packageName = parser<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getPackageName</span>()<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span> String optimizedDirectory = PluginDirHelper<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getPluginDalvikCacheDir</span>(hostContext, packageName)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span> String libraryPath = PluginDirHelper<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getPluginNativeLibraryDir</span>(hostContext, packageName)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span> ClassLoader classloader = new PluginClassLoader(apkfile, optimizedDirectory, libraryPath, ClassLoader<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getSystemClassLoader</span>())<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span> // DexFile dexFile = DexFile<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.loadDex</span>(apkfile, PluginDirHelper<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getPluginDalvikCacheFile</span>(mContext, parser<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getPackageName</span>()), <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>)<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</span> // Log<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.e</span>(TAG, <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"dexFile=%s,1=%s,2=%s"</span>, dexFile, DexFile<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.isDexOptNeeded</span>(apkfile), DexFile<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.isDexOptNeeded</span>(PluginDirHelper<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getPluginDalvikCacheFile</span>(mContext, parser<span class="hljs-preprocessor" style="color: rgb(68, 68, 68); box-sizing: border-box;">.getPackageName</span>())))<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">;</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></ul> 占坑——预注册四大组件
360 Android插件DroidPlugin中，主要的四大组件代理方式还是占坑。这里所说的占坑就是指，在AndroidManifest.xml中预注册以下可能会用到的信息。
ps.这个方式不是特别好。如果大家对为什么要预注册这个问题不是很了解，或者不了解为什么不好。可以看一下我的博客，我会持续更新。http://blog.csdn.net/yzzst/article/details/45582315
OK，下面是我们从DroidPlugin的Test项目中，截取出来的AndroidManifest.xml代码，我们看看什么叫占坑，怎么占坑。代码如下所示：
<code class="language-xml 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-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">application </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:icon</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@drawable/ic_launcher"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@string/app_name"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:theme</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@style/AppTheme"</span> ></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".MyActivity"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@string/app_name"</span> ></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">intent-filter</span>></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">action</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"android.intent.action.MAIN"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">category</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"android.intent.category.LAUNCHER"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">intent-filter</span>></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity</span>></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".ServiceTest1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"服务测试"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".ContentProviderTest"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"ContentProvider测试"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".BroadcastReceiverTest"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"广播测试"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".NotificationTest"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"通知测试"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".ServiceTest2"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"多进程服务测试"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".ContentProviderTest2"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"多进程ContentProvider测试"</span> /></span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><!-- 预声明不同process的Service --></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">service</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".Service1"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">service</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".Service2"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">service </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".Service3"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:process</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">":Process2"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">service </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".Service4"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:process</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">":Process2"</span> /></span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><!-- 预声明两种process的Provider --></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">provider </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".MyContentProvider1"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:authorities</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"com.example.ApiTest.MyContentProvider1"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">provider </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".MyContentProvider2"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:authorities</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"com.example.ApiTest.MyContentProvider2"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:process</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">":Process2"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">receiver</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".StaticBroadcastReceiver"</span> ></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">intent-filter</span>></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">action</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"com.example.ApiTest.StaticBroadcastReceiver"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">intent-filter</span>></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">receiver</span>></span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><!-- 预声明各种launchMode的Activity --></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".StandardActivity"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@string/title_activity_standard"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".SingleTopActivity"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@string/title_activity_single_top"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:launchMode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"singleTop"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".SingleTaskActivity"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@string/title_activity_single_task"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:launchMode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"singleTask"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".SingleInstanceActivity"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@string/title_activity_single_instance"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:launchMode</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"singleInstance"</span> /></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity </span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:name</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">".ActivityTestActivity"</span> <span class="hljs-attribute" style="box-sizing: border-box; color: rgb(102, 0, 102);">android:label</span>=<span class="hljs-value" style="box-sizing: border-box; color: rgb(0, 136, 0);">"@string/title_activity_activity_test"</span> ></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">activity</span>></span> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"></<span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);">application</span>></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><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li><li style="box-sizing: border-box; padding: 0px 5px;">33</li><li style="box-sizing: border-box; padding: 0px 5px;">34</li><li style="box-sizing: border-box; padding: 0px 5px;">35</li><li style="box-sizing: border-box; padding: 0px 5px;">36</li><li style="box-sizing: border-box; padding: 0px 5px;">37</li><li style="box-sizing: border-box; padding: 0px 5px;">38</li><li style="box-sizing: border-box; padding: 0px 5px;">39</li><li style="box-sizing: border-box; padding: 0px 5px;">40</li><li style="box-sizing: border-box; padding: 0px 5px;">41</li><li style="box-sizing: border-box; padding: 0px 5px;">42</li><li style="box-sizing: border-box; padding: 0px 5px;">43</li><li style="box-sizing: border-box; padding: 0px 5px;">44</li><li style="box-sizing: border-box; padding: 0px 5px;">45</li><li style="box-sizing: border-box; padding: 0px 5px;">46</li><li style="box-sizing: border-box; padding: 0px 5px;">47</li><li style="box-sizing: border-box; padding: 0px 5px;">48</li><li style="box-sizing: border-box; padding: 0px 5px;">49</li><li style="box-sizing: border-box; padding: 0px 5px;">50</li><li style="box-sizing: border-box; padding: 0px 5px;">51</li><li style="box-sizing: border-box; padding: 0px 5px;">52</li><li style="box-sizing: border-box; padding: 0px 5px;">53</li><li style="box-sizing: border-box; padding: 0px 5px;">54</li><li style="box-sizing: border-box; padding: 0px 5px;">55</li><li style="box-sizing: border-box; padding: 0px 5px;">56</li><li style="box-sizing: border-box; padding: 0px 5px;">57</li><li style="box-sizing: border-box; padding: 0px 5px;">58</li><li style="box-sizing: border-box; padding: 0px 5px;">59</li><li style="box-sizing: border-box; padding: 0px 5px;">60</li><li style="box-sizing: border-box; padding: 0px 5px;">61</li><li style="box-sizing: border-box; padding: 0px 5px;">62</li><li style="box-sizing: border-box; padding: 0px 5px;">63</li><li style="box-sizing: border-box; padding: 0px 5px;">64</li><li style="box-sizing: border-box; padding: 0px 5px;">65</li><li style="box-sizing: border-box; padding: 0px 5px;">66</li><li style="box-sizing: border-box; padding: 0px 5px;">67</li><li style="box-sizing: border-box; padding: 0px 5px;">68</li><li style="box-sizing: border-box; padding: 0px 5px;">69</li><li style="box-sizing: border-box; padding: 0px 5px;">70</li><li style="box-sizing: border-box; padding: 0px 5px;">71</li><li style="box-sizing: border-box; padding: 0px 5px;">72</li><li style="box-sizing: border-box; padding: 0px 5px;">73</li><li style="box-sizing: border-box; padding: 0px 5px;">74</li><li style="box-sizing: border-box; padding: 0px 5px;">75</li><li style="box-sizing: border-box; padding: 0px 5px;">76</li><li style="box-sizing: border-box; padding: 0px 5px;">77</li><li style="box-sizing: border-box; padding: 0px 5px;">78</li></ul>
大家都看的出来，虽然简单的插件已经完全够用了。但是这种方式确实不是很好。
Hook 系统API方法
DroidPlugin中最重要的就是，为了让插件中的方法能够正确的调用。DroidPlugin把所有的，方法都在内部Hook并替换掉了。
等等，为什么不能够正确的调用？
因为，这个是一个插件系统，Activity是虚拟Proxy出来的。四大组件，并不是真正的，即Context拿到不一定是真的。系统也不会有此类的回调。所以，很多单例都需要Context才能使用。
比如：InputMethodManager.getInstance(Context context);这时，插件中的代码将不能够直接运行。当然，还有其他原因。
具体的替换和操作方法，我们能够在 HookFactory.java文件中installHook方法中，看到整个DroidPlugin的具体操作如下所示：
<code class="hljs java 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;">public</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">final</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;">installHook</span>(Context context, ClassLoader classLoader) <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">throws</span> Throwable { installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IClipboardBinderHook(context), classLoader); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//for INotificationManager</span> installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> INotificationManagerBinderHook(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IMountServiceBinder(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IAudioServiceBinderHook(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IContentServiceBinderHook(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IWindowManagerBinderHook(context), classLoader); <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP_MR1) { installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IGraphicsStatsBinderHook(context), classLoader); } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (VERSION.SDK_INT >= VERSION_CODES.KITKAT) { installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IMediaRouterServiceBinderHook(context), classLoader); } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) { installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> ISessionManagerBinderHook(context), classLoader); } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR2) { installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IWifiManagerBinderHook(context), classLoader); } <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR2) { installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IInputMethodManagerBinderHook(context), classLoader); } installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IPackageManagerHook(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> IActivityManagerHook(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> PluginCallbackHook(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> InstrumentationHook(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> LibCoreHook(context), classLoader); installHook(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">new</span> SQLiteDatabaseHook(context), classLoader); }</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><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li><li style="box-sizing: border-box; padding: 0px 5px;">33</li></ul> 限制和缺陷
Ok，说到最后，还是得称赞一下360。国内大公司开源的使用框架原来越少了。他们的这一举动确实是造福了目前的Android开发者。
但是，对于DroidPlugin来说，目前还存在一下几种不足和缺点：
-
无法在插件中发送具有自定义资源的Notification，例如： a. 带自定义RemoteLayout的Notification b.
图标通过R.drawable.XXX指定的通知（插件系统会自动将其转化为Bitmap） -
无法在插件中注册一些具有特殊Intent
Filter的Service、Activity、BroadcastReceiver、ContentProvider等组件以供Android系统、已经安装的其他APP调用。 -
对Activity的LaunchMode支持不够好，Activity
Stack管理存在一定缺陷。Activity的onNewIntent函数可能不会被触发。 （此为BUG，未来会修复） -
缺乏对Native层的Hook，对某些带native代码的apk支持不好，可能无法运行。比如一部分游戏（cocos2d、unity3d开发的游戏估计都用不了）无法当作插件运行。
当然，看我说的再多，也只是我的个人理解，有兴趣的同学，直接去github clone一份代码阅读阅读吧。
github地址为： https://github.com/Qihoo360/DroidPlugin