如何在Android Eclipse ProGuard规则中修复警告"无法找到引用的类"？

Question

我正在使用Eclipse.在我的Android代码中,我使用了ProGuard.但是在导出APK时,我遇到了以下警告:

Proguard returned with error code 1. See console
Warning: okio.DeflaterSink: can't find referenced class     org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
Warning: okio.Okio: can't find referenced class java.nio.file.Files
Warning: okio.Okio: can't find referenced class java.nio.file.Files
Warning: okio.Okio: can't find referenced class java.nio.file.Files
Warning: okio.Okio: can't find referenced class java.nio.file.Path
Warning: okio.Okio: can't find referenced class java.nio.file.OpenOption
Warning: okio.Okio: can't find referenced class java.nio.file.Path
Warning: okio.Okio: can't find referenced class java.nio.file.OpenOption
Warning: okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
Warning: okio.Okio: can't find referenced class java.nio.file.Path
Warning: okio.Okio: can't find referenced class java.nio.file.OpenOption
Warning: okio.Okio: can't find referenced class java.nio.file.Path
Warning: okio.Okio: can't find referenced class java.nio.file.OpenOption
Warning: okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
       You should check if you need to specify additional program jars.
Warning: there were 14 unresolved references to classes or interfaces.
          You may need to specify additional library jars (using '-libraryjars').
java.io.IOException: Please correct the above warnings first.
at proguard.Initializer.execute(Initializer.java:321)
at proguard.ProGuard.initialize(ProGuard.java:211)
at proguard.ProGuard.execute(ProGuard.java:86)
at proguard.ProGuard.main(ProGuard.java:492)

怎么了？

Answer 1

您可以通过修改'progaurd-rules.pro'来解决这个问题,这似乎是您正在使用Progaurd缩小您的代码.

您必须使用-dontwarn但在将此proguard文件添加到文件之前要小心,因为测试时不会出现错误,因为Proguard已经删除了一些未使用的类

对于OKiO的情况添加这些行

-dontwarn java.nio.file.*
-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
-dontwarn okio.**

对于任何其他库,您可以看到此链接以进行进一步的proguard操作 https://github.com/krschultz/android-proguard-snippets

Answer 2

可能最好从android-proguard-snippets添加Okio规则:

# Okio
-keep class sun.misc.Unsafe { *; }
-dontwarn java.nio.file.*
-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
-dontwarn okio.**