Android:如何告诉 ShrinkResources 保留某些资源 [英] Android: How to tell ShrinkResources to keep certain resources

问题描述

我的 res/raw 文件夹中有一个 mp3 和一个 ogg 文件，用于 Android 媒体播放器.我像这样使用了 setDataSource

I have an mp3 and an ogg file in my res/raw folder which I used with Android Media Player. I used setDataSource like so

musicPlayer.setDataSource(context, Uri.parse("android.resource://com.me.myapp/" + R.raw.music));

这在从 Android Studio 运行时工作正常，但是，当导出带有 shrinkResouces 启用，它会去除 mp3(如上所述，我也有一个 ogg 文件，我以同样的方式使用它，但也会被去除).以下是 Resouces.txt 文件中的相关结果:

This works fine when running from Android Studio, however, when exporting a signed APK with shrinkResouces enabled, it strips out the mp3 (as mentioned above, I also have an ogg file which I use in the same way and which also gets stripped out). Here is the associated results in the Resouces.txt file:

跳过未使用的资源 res/raw/music.mp3:485531 字节(替换为大小为 0 字节的小型虚拟文件)

Skipped unused resource res/raw/music.mp3: 485531 bytes (replaced with small dummy file of size 0 bytes)

跳过未使用的资源 res/raw/oggmusic.ogg:5335764 字节(替换为大小为 0 字节的小型虚拟文件)

Skipped unused resource res/raw/oggmusic.ogg: 5335764 bytes (replaced with small dummy file of size 0 bytes)

我已经做了一些研究，Google 问题跟踪器上有关于这个问题的错误报告，但是发帖人说他/她使用了上面链接中包含的信息来确保所需的资源没有被删除，并且问题已被标记为预期行为"(我觉得这有点奇怪，因为我不认为这是删除所需资源的预期行为).

I've done some research and there is a bug report on the Google Issue Tracker for this problem, however the poster says he/she used the information contained in the above link to make sure the required resources were not removed and the issue has been marked as 'intended behaviour' (which I find a little odd as I wouldn't have thought it would be intended behaviour for required resources to be removed).

无论如何，我已经尝试按照文档中的说明进行操作，但似乎不起作用，我在这里做错了什么?我创建了一个名为keep.xml"的 xml 文件，并将它放在我的原始文件夹中，与要保留的资源一起.

Anyway, I've tried to do as mentioned in the docs and it doesn't seem to work, what am I doing wrong here? I've created an xml file called 'keep.xml' and placed it into my raw folder alongside the resources to keep.

这是 XML:

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:tools="http://schemas.android.com/tools"
       tools:keep="@raw/*.mp3, @raw/*.ogg"/>

这个问题在 Eclipse 中并不明显，但在迁移到 Android Studio 后就出现了.

This issue wasn't evident in Eclipse, but has appeared since migrating to Android Studio.

编辑

我做了更多的测试，我可以确认我在 XML 文件中指定的任何内容都被完全忽略了.如果我使用丢弃"例如，代替或代替 'keep'，'discard' 中声明的资源出现在生成的 APK 文件中，所以我一定是做错了什么或在某处遗漏了一步.

I did a bit more testing and I can confirm that whatever I specify in the XML file is being completely ignored. If I use "discard" for example instead of, or in place of 'keep', the resources stated in 'discard' appear in the generated APK file, so I must be doing something wrong or missing a step out somewhere.

推荐答案

我刚刚遇到了这个问题，并发现了我做错了什么.

I just experienced this issue and have found out what I was doing wrong.

引用资源时不要指定文件扩展名.

Do not specify file extensions when referring to resources.

我最初所做的(这行不通):

What I did at first (this will not work):

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:tools="http://schemas.android.com/tools"
    tools:keep="@raw/vid.mp4"
    />

解决方案，删除文件扩展名:

Solution, drop the file extension:

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:tools="http://schemas.android.com/tools"
    tools:keep="@raw/vid"
    />

您可以通过检查可以在 ./app/build/outputs/mapping/<buildType>/resources.txt 中找到的 resources.txt 文件来验证这一点https://developer.android.com/studio/build/shrink-code

You can verify this by inspecting the resources.txt file that you can find at ./app/build/outputs/mapping/<buildType>/resources.txt https://developer.android.com/studio/build/shrink-code

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