android - com.google.android.gms.internal.zzhu : can't find referenced class android. security.NetworkSecurityPolicy

Question

我尝试使用 proguard 生成 apk，但在尝试构建时出现此错误:

Warning: com.google.android.gms.internal.zzhu: can't find referenced class android.security.NetworkSecurityPolicy

Warning: there were 3 unresolved references to classes or interfaces.
You may need to add missing library jars or update their versions.         If your code works fine without the missing classes, you can suppress         the warnings with '-dontwarn' options.

(http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)
:app:proguardRelease FAILED
Error:Execution failed for task ':app:proguardRelease'.
java.io.IOException: Please correct the above warnings first.

最近，我升级了我的 Android SDK 工具。在此之前，这个项目对 proguard 没有任何问题。我发现了这篇文章 (https://plus.google.com/+PaulBurke/posts/T3vmAnRP3q6)，Oliver Renner 写道:

"So basically the next Google library that may not be upgraded to the latest version. It also seems to require compileSdk 23 in order to be able to use ProGuard without modifications (Warning: com.google.android.gms.internal.zzhu: can't find referenced class android.security.NetworkSecurityPolicy)"*

我更新了我的项目以使用 SDK 23 进行编译，但问题没有解决。

下面，我包含了我的 build.gradle 文件的一些部分:

compileSdkVersion 23
    buildToolsVersion "23.0.0"

    defaultConfig {
        applicationId "com.sample.sample"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0.0"
    }

.
.
.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.0.0'
    compile 'com.google.android.gms:play-services:+'
    compile 'com.android.support:design:23.0.0'
    compile('com.crashlytics.sdk.android:crashlytics:2.5.0@aar') {
        transitive = true;
    }
}

Answer 1

我遇到了同样的问题。警告消息说:

If your code works fine without the missing classes, you can suppress the warnings with '-dontwarn' options.

让我们接受它的建议:

-dontwarn com.google.android.gms.internal.zzhu

对我来说，这解决了问题。但是，如果由于某种原因你的代码在没有类的情况下不能正常工作，你可以另外做这样的事情(未经测试):

-keep class com.google.android.gms.internal.** { *; }

请注意，无论哪种方式，您都需要 -dontwarn 行。祝你好运!