使用 Android Studio 的补丁支持库 [英] patch support library using Android Studio

问题描述

一个月前我已经将我的项目转移到了 Android Studio，我很高兴我做到了，尽管需要切换到一个新的(更强大的)构建系统 (gradle).我在 Eclipse 中知道的一件事是修补支持库，但我现在不知道如何实现.我知道这听起来不是一个好的做法，但是几行代码让我发疯，解决方案是简单地修改它以解决我的问题.
我已经尝试修改sdk的.\extras\android\m2repository\com\android\support"目录下的代码，但是这似乎并不影响真正用于编译的代码.
知道如何实现这一目标吗?

I've moved my project to Android Studio a month ago, and I'm glad I did, despite the need to switch to a new (and more powerful) build system (gradle). One thing I'd have known in Eclipse, but I can't figure out how to achieve now, is patching the support library. I know that it does not sound like a good practice, but a couple of code lines are driving me crazy, and the solution would be to simply modify it to solve my problem.
I've tried to modify the code in the sdk's ".\extras\android\m2repository\com\android\support" directory, but that does not seem to affect the code that is really used for compilation.
Any idea about how to achieve this ?

我试图在我的项目中创建一个模块SupportLibraryV4"，这是我尝试构建它时 gradle 告诉我的:

I tried to create a module "SupportLibraryV4" in my project, and this is what gradle tells me when I try to build it :

Error Code:
    1
Output:

    trouble processing "java/android/support/v4/R$anim.class":

    Ill-advised or mistaken usage of a core class (java.* or javax.*)
    when not building a core library.

    This is often due to inadvertently including a core library file
    in your application's project, when using an IDE (such as
    Eclipse). If you are sure you're not intentionally defining a
    core class, then this is the most likely explanation of what's
    going on.

    However, you might actually be trying to define a class in a core
    namespace, the source of which you may have taken, for example,
    from a non-Android virtual machine project. This will most
    assuredly not work. At a minimum, it jeopardizes the
    compatibility of your app with future versions of the platform.
    It is also often of questionable legality.

    If you really intend to build a core library -- which is only
    appropriate as part of creating a full virtual machine
    distribution, as opposed to compiling an application -- then use
    the "--core-library" option to suppress this error message.

    If you go ahead and use "--core-library" but are in fact
    building an application, then be forewarned that your application
    will still fail to build or run, at some point. Please be
    prepared for angry customers who find, for example, that your
    application ceases to function once they upgrade their operating
    system. You will be to blame for this problem.

    If you are legitimately using some code that happens to be in a
    core package, then the easiest safe alternative you have is to
    repackage that code. That is, move the classes in question into
    your own package namespace. This means that they will never be in
    conflict with core system classes. JarJar is a tool that may help
    you in this endeavor. If you find that you cannot do this, then
    that is an indication that the path you are on will ultimately
    lead to pain, suffering, grief, and lamentation.

    1 error; aborting

令人印象深刻！

推荐答案

Android sdk 没有构建支持库所需的所有文件.您需要从 https://android.googlesource.com 签出其他存储库:

Android sdk doesn't have all required files for building support library. You need to checkout additional repositories from https://android.googlesource.com:

• 平台/框架/支持
• 平台/预建/gradle-plugin
• platform/prebuilts/maven_repo/android
• 平台/预建/SDK
• 平台/预构建/工具

请保持目录结构与android存储库中的一样.

Please, keep the directory structure as in android repository.

现在您可以更改支持库中的任何代码.如果您需要更改 api v.4 的支持库，请在platform\frameworks\support\v4"中进行.要构建支持库的补丁版本，请使用 gradle 和下一个命令:

Now you could change any code in support library. If you need to change support library for api v.4 do it in "platform\frameworks\support\v4". For building patched version of support library use gradle with next command:

platform\frameworks\support\v4\gradle clean jar

生成的 jar 可以在platform\out\host\gradle\frameworks\support\v4\libs\"中找到.将其放入项目的 libs 文件夹并添加到 build.gradle 文件中.

Resulted jar could be found in "platform\out\host\gradle\frameworks\support\v4\libs\". Put it to the libs folder of your project and add in build.gradle file.

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