Android混淆冲突正确解决姿势

背景

 话说有一天，客户说用了你们混淆过的aar库，发现与别人的另一个库冲突了，都存在a.a.a.b.a类，让你赶紧修改，经过一顿面向搜索引擎编程，你发现通过自定义混淆字典可以解决问题，就像下面这样；

其中class_dictionary.txt文件可能是这样的：

//package_dicitonary.txt
# This obfuscation dictionary contains reserved Java keywords. They can't
# be used in Java source files, but they can be used in compiled class files.
# Note that this hardly improves the obfuscation. Decent decompilers can
# automatically replace reserved keywords, and the effect can fairly simply be
# undone by obfuscating again with simpler names.
# Usage:
#     java -jar proguard.jar ..... -obfuscationdictionary filename.txt
#ju
ly
is
a
fantastic
month
and
al
ov
ely
girl

你原本想着半天搞定，没想到十分钟就搞定了，顺手就将新的aar库丢给了客户，心中暗喜，接下来劳资可以摸鱼一整天了；没出两分钟，对方顺手就甩你一个bug：

> Task :fpvdemo:minifyReleaseWithR8 FAILED
AGPBI: {"kind":"error","text":"java.nio.file.NoSuchFileException: C:\\Users\\xxxxxxx\\.gradle\\caches\\transforms-2\\files-2.1\\75131363c84dga13bdfer09e2d223de0\\xxxlib\\.\\dictionary\\default_dictionary.txt","sources":[{"file":"C:\\Users\\xxxxxxx\\.gradle\\caches\\transforms-2\\files-2.1\\75131363c84dga13bdfer09e2d223de0\\xxxlib\\.\\dictionary\\default_dictionary.txt"}],"tool":"R8"}

你心想不可能呀，这么简单的东西，是不是他不会用，但本着甲方为大的原则，还是在demo里面跑一跑试试，混淆不开启没问题，混淆一开启，哎呀，还真翻车了，出现同样的问题:

> Task :fpvdemo:minifyReleaseWithR8 FAILED
AGPBI: {"kind":"error","text":"java.nio.file.NoSuchFileException: C:\\Users\\xxxxxxx\\.gradle\\caches\\transforms-2\\files-2.1\\52131363c840aa13bdf7509e2d2e8de0\\xxxlib\\.\\dictionary\\default_dictionary.txt","sources":[{"file"

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