如何在Android Eclipse ProGuard規則中修復警告“無法找到引用的類”？

Question

我正在使用Eclipse。 在我的Android代碼中，我使用了ProGuard。 但是在導出APK時，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

您可以通過修改'progaurd-rules.pro'來解決這個問題，這似乎是您正在使用Progaurd縮小您的代碼。

你必須使用-dontwarn但是在將它添加到proguard文件之前要小心，因為測試時不會出錯，因為Proguard已經刪除了一些沒有使用的類

對於OKiO的情況添加這些行

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

對於任何其他庫，您可以看到此鏈接以進行進一步的proguard操作https://github.com/krschultz/android-proguard-snippets

Answer 2

可能最好從android-proguard-snippets添加Okio規則：

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