android – build on play-services：11.8.x with pro guard parser error

所以看起来最新的播放服务中存在一个错误.
有谁知道如何解决这个问题？

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':myappname:transformClassesWithAndroidGradleClassShrinkerForDevelopmentDebug'.
> ProGuard configuration parser error: /Users/myusername/.gradle/caches/transforms-1/files-1.1/play-services-base-11.8.0.aar/d2ad9e16677fda9cf07a1280a66e91ca/proguard.txt line 3:88 no viable alternative at input '<fields>'

更多信息.似乎问题出在核心模块中：

Error:Execution failed for task ':myappname:transformClassesWithAndroidGradleClassShrinkerForDevelopmentDebug'.
> ProGuard configuration parser error: /Users/myusername/.gradle/caches/transforms-1/files-1.1/play-services-base-11.8.0.aar/d2ad9e16677fda9cf07a1280a66e91ca/proguard.txt line 3:88 no viable alternative at input '<fields>'

编辑：
导致该错误的文件的内容是：

# b/35135904 Ensure that proguard will not strip the mResultGuardian.
-keepclassmembers class com.google.android.gms.common.api.internal.BasePendingResult {
  com.google.android.gms.common.api.internal.BasePendingResult.ReleasableResultGuardian <fields>;
}

解决方法:

似乎默认的收缩器已经改变了.添加配置以启用ProGuard似乎可行.

buildTypes {
        release {
            debuggable false
            minifyEnabled true
            useProguard true
            ...
        }
        debug {
            debuggable true
            minifyEnabled true
            useProguard true
            ...
        }
    }

标签：android,google-play-services,android-proguard
来源： https://codeday.me/bug/20190926/1821166.html