什么jar/dex文件提供了Android.jar的真正实现

发布于 2024-12-06 00:32:45 字数 553 浏览 3 评论 0原文

编译 Android SDK 源代码后，我遇到了一些有趣的问题。我尝试反汇编生成的android.jar，但发现大多数该 jar 文件中包含的方法只是一个不执行任何操作的存根不仅仅是抛出运行时异常，例如：

public void startActivityForResult(android.content.Intent, int);
Code:
0:  new #2; //class java/lang/RuntimeException
3:  dup
4:  ldc #3; //String Stub!
6:  invokespecial   #4; //Method java/lang/
RuntimeException."<init>":(Ljava/lang/String;)V
9:  athrow

我可以理解 Android.jar 可能不需要包含 Android 框架的真正实现，因为它仅充当第三方应用程序的编译时库。但我的问题是：什么是提供 android.jar 真正实现的 Jar 或 Dex 文件？我假设它也应该在编译 SDK 时生成，对吗？

谢谢！二

原文

I ran into some interesting problem after compiling the Android SDK source. I
tried to disassemble the resulting android.jar, but found that most
methods contained in that jar file are just a stub that does nothing
more than throwing a runtime exception, for example:

public void startActivityForResult(android.content.Intent, int);
Code:
0:  new #2; //class java/lang/RuntimeException
3:  dup
4:  ldc #3; //String Stub!
6:  invokespecial   #4; //Method java/lang/
RuntimeException."<init>":(Ljava/lang/String;)V
9:  athrow

I can understand there might be no need for Android.jar to contain the
real implementations of Android Framework, given it only serves as a
compile-time library for 3rd party apps. But my question is: what is
the Jar or Dex file(s) that provides the real implementation of android.jar? I
assume it should also be generated when compiling the SDK, am I right?

Thanks!
LL

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