为什么Proguard的保留活动类的Andr​​oid？ [英] Why Proguard keeps Activity class in Android?

问题描述

我已经申请的ProGuard ，以我的Andr​​oid应用程序。

I have applied ProGuard to my Android application.

我用

android-studio/sdk/tools/proguard/proguard-android.txt

作为配置文件，变着法子。

as a configuration file, changing nothing.

在这个文件，我可以看到有关的唯一语句的活动

In this file I can see the only statement regarding Activity:

We want to keep methods in Activity that could be used in the XML attribute onClick
-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}

从后面的活动类名被ProGuard的obfusctated而有些方法是preserved，因为它们。这是可以理解的。

It follows from that the Activities class names are obfusctated by ProGuard while some methods are preserved as they are. This is understandable.

不过，在我的应用程序，然后从字符串使用创建活动类

However, in my application I then create an Activity Class from a string using

Class.forName("my.app.MyActivity")

然后我开始这个活动，并启动正常。

then I start this Activity and it starts fine.

但是，这意味着活动派生类不混乱？。它应该已经失败了，因为ProGuard的不具有 -keep类指令为活动，它只有 -keepclassmembers。

But that means Activity-derived classes are not obfuscated??. It should have failed because ProGuard does not have -keep class directive for Activity, it only has -keepclassmembers.

有人可以，请解释一下，如果我可以依靠我观察行为？还是我误解了 -keepclassmembers 指令？

Can someone, please, explain, if I can rely on the behaviour I observe? Or do I misunderstand the -keepclassmembers directive?

推荐答案

由于活动都在清单和类上市引用有会被自动保存。这是必要的，因为Android框架通过反射访问这些应用程序的入口点。

Because the activities are listed in the manifest and classes referenced there are automagically kept. This is needed because the Android framework accesses these app entry points via reflection.

从<一个href=\"http://stackoverflow.com/questions/19180434/why-proguard-processes-androidmanifest-xml\">here:

在生成过程运行该工具AAPT自动创建配置文件斌/ proguard.txt ，根据的Andr​​oidManifest.xml 和其他XML文件。然后，构建过程传递配置文件的ProGuard。所以ProGuard的本身确实没有考虑的Andr​​oidManifest.xml ，但AAPT + ProGuard的事情。

The build process runs the tool aapt to automatically create the configuration file bin/proguard.txt, based on AndroidManifest.xml and other xml files. The build process then passes the configuration file to ProGuard. So ProGuard itself indeed doesn't consider AndroidManifest.xml, but aapt+ProGuard do.

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