android - D8 : Type `sun.misc.Unsafe` was not found

Question

在我的 android 项目中启用 D8 后，我开始看到这些警告:

/Users/yashasvi/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/27.0.1-android/b7e1c37f66ef193796ccd7ea6e80c2b05426182d/guava-27.0.1-android.jar: D8: Type `sun.misc.Unsafe` was not found, it is required for default or static interface methods desugaring of `void com.google.common.util.concurrent.AbstractFuture$UnsafeAtomicHelper.<clinit>()`
/Users/yashasvi/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/27.0.1-android/b7e1c37f66ef193796ccd7ea6e80c2b05426182d/guava-27.0.1-android.jar: D8: Type `sun.misc.Unsafe` was not found, it is required for default or static interface methods desugaring of `sun.misc.Unsafe com.google.common.cache.Striped64.getUnsafe()`
/Users/yashasvi/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/27.0.1-android/b7e1c37f66ef193796ccd7ea6e80c2b05426182d/guava-27.0.1-android.jar: D8: Type `sun.misc.Unsafe` was not found, it is required for default or static interface methods desugaring of `sun.misc.Unsafe com.google.common.hash.LittleEndianByteArray$UnsafeByteArray.getUnsafe()`
/Users/yashasvi/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/27.0.1-android/b7e1c37f66ef193796ccd7ea6e80c2b05426182d/guava-27.0.1-android.jar: D8: Type `sun.misc.Unsafe` was not found, it is required for default or static interface methods desugaring of `void com.google.common.util.concurrent.AbstractFuture$UnsafeAtomicHelper.<clinit>()`
/Users/yashasvi/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/27.0.1-android/b7e1c37f66ef193796ccd7ea6e80c2b05426182d/guava-27.0.1-android.jar: D8: Type `sun.misc.Unsafe` was not found, it is required for default or static interface methods desugaring of `sun.misc.Unsafe com.google.common.cache.Striped64.getUnsafe()`
/Users/yashasvi/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/27.0.1-android/b7e1c37f66ef193796ccd7ea6e80c2b05426182d/guava-27.0.1-android.jar: D8: Type `sun.misc.Unsafe` was not found, it is required for default or static interface methods desugaring of `sun.misc.Unsafe com.google.common.hash.LittleEndianByteArray$UnsafeByteArray.getUnsafe()`

.

项目构建成功，但在运行时，我看到这些错误日志，因此，应用程序功能受到影响。

 java.lang.AbstractMethodError: abstract method "java.lang.Object com.google.common.base.e.a(java.lang.Object)"
        at com.google.common.e.a.i$c.a(SourceFile:1464)
        at com.google.common.e.a.i$c.a(SourceFile:1453)
        at com.google.common.e.a.i$a.run(SourceFile:1408)
        at com.google.common.e.a.l$a.execute(SourceFile:456)
        at com.google.common.e.a.i$f.a(SourceFile:153)
        at com.google.common.e.a.i.a(SourceFile:1234)

搜索了一段时间后，我没能找到任何有用的东西。请帮忙。

是的，如果禁用 D8 并且其他一切都保持不变，我不会在运行时遇到此错误。

Answer 1

你需要保持sun.misc.Unsafe:

-keep class sun.misc.Unsafe { *; }
-dontnote sun.misc.Unsafe

或者，带有includedescriptorclasses 的规则应该保持动态:

-keep,includedescriptorclasses class com.google.common.**

一般来说:

• 添加开关-verbose对编写ProGuard配置规则很有帮助。

• 添加开关-dontoptimize可用于禁用所有优化，以供测试。

刚找到this :

R8 now understands proguard specs in META-INF/proguard.

但除非已添加，否则必须添加自定义规则 - 而不是使用消费者规则。