尝试生成签名的 APK android studio 3 时出错

Question

尝试在 android studio 3 中生成签名 APK 时出现以下错误

 Error:trouble processing "javax/xml/namespace/QName.class":
Error:Ill-advised or mistaken usage of a core class (java.* or javax.*)
Error:when not building a core library.
Error:This is often due to inadvertently including a core library file
Error:in your application's project, when using an IDE (such as
Error:Eclipse). If you are sure you're not intentionally defining a
Error:core class, then this is the most likely explanation of what's
Error:going on.
Error:However, you might actually be trying to define a class in a core
Error:namespace, the source of which you may have taken, for example,
Error:from a non-Android virtual machine project. This will most
Error:assuredly not work. At a minimum, it jeopardizes the
Error:compatibility of your app with future versions of the platform.
Error:It is also often of questionable legality.
Error:If you really intend to build a core library -- which is only
Error:appropriate as part of creating a full virtual machine
Error:distribution, as opposed to compiling an application -- then use
Error:the "--core-library" option to suppress this error message.
Error:If you go ahead and use "--core-library" but are in fact
Error:building an application, then be forewarned that your application
Error:will still fail to build or run, at some point. Please be
Error:prepared for angry customers who find, for example, that your
Error:application ceases to function once they upgrade their operating
Error:system. You will be to blame for this problem.
Error:If you are legitimately using some code that happens to be in a
Error:core package, then the easiest safe alternative you have is to
Error:repackage that code. That is, move the classes in question into
Error:your own package namespace. This means that they will never be in
Error:conflict with core system classes. JarJar is a tool that may help
Error:you in this endeavor. If you find that you cannot do this, then
Error:that is an indication that the path you are on will ultimately
Error:lead to pain, suffering, grief, and lamentation.
Error:1 error; aborting
Error:Execution failed for task ':_4SaleApp:transformClassesWithDexForRelease'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: Error while executing java process with main class com.android.dx.command.Main with arguments {--dex --num-threads=4 --multi-dex --main-dex-list /Volumes/Data/AMIRA/Work/Q84Sale/Q84Sale/_4SaleApp/build/intermediates/multi-dex/release/maindexlist.txt --output /Volumes/Data/AMIRA/Work/Q84Sale/Q84Sale/_4SaleApp/build/intermediates/transforms/dex/release/0 --min-sdk-version 16 /Volumes/Data/AMIRA/Work/Q84Sale/Q84Sale/_4SaleApp/build/intermediates/transforms/jarMerging/release/0.jar}

有人可以帮忙吗？

Answer 1

XPP 答案对我不起作用。大多数交叉引用的答案都忽略了这可能是由其他库依赖项（即 JAR/AAR）引起的。在我的情况下，这个错误只出现在签名的构建过程中——未签名的构建很好。

运行 'gradlew :[MY-PROJECT]:dependencies' 会显示完整的依赖关系树。如果你发现一个依赖使用了 javax/java 命名空间中的 JAR 或类，那么你可以在你的依赖声明中添加一个 gradle exclude 语句，例如（gradle 4.1+）：

api('my.favorite.dependency') { exclude group: 'javax' }

然后再次运行 gradle ':dependencies' 任务。您应该看到排除的依赖项现在已从树中删除。如果编译需要此依赖项并且在其他地方未提供此依赖项，则 build*/assemble* 任务将失败。如果在运行时需要依赖项并且没有在其他地方提供，例如。由操作系统，然后是应用程序。将编译，然后在运行时失败并出现“ClassNotFound”异常。

在最坏的情况下，如果依赖关系树没有太大帮助，那么您可能必须开始注释掉依赖关系和使用它们的代码，以找到罪魁祸首依赖关系。希望导致此错误的依赖项几乎没有被使用。找到导致错误的依赖项后，您需要使用两种方法之一来修复这种情况。用不会导致错误的东西替换 JAR/AAR；或重建依赖关系，使 javax/java 类不与 JAR/AAR 一起导出。

Answer 2

我看到了同样的错误。就我而言，发生这种情况是因为我包含了 logback。添加以下内容为我解决了这个问题（如here 所述）：

compile('com.github.tony19:logback-android-classic:1.1.1-6') {
    exclude group: 'com.google.android', module: 'android'
}

添加上述内容后，我仍然看到一个问题（如 here 所述），我必须添加以下内容：

configurations {
    all {
        exclude module: 'httpclient'
    }
}

Answer 3

我遇到了同样的问题。我遵循@Amira Elsayed Ismail 的建议并降级到 gradle 2.3.3

构建错误消失了，但我收到了新的有线警告Warning:Ignoring Android API artifact com.google.android:android:4.1.1.4 for release。经过长时间的搜索，我知道出现此错误是因为我的项目依赖项之一依赖于 com.google.android:android，这意味着此依赖项已直接声明了对某个 Android 版本的依赖项。

我必须知道我的哪个依赖项是导致该警告的原因。我尝试在 app\build.gradle 中一一注释依赖项并构建项目。

就我而言，当我删除这个包compile 'com.sematext.android:sematext-logsene:1.0.0' 时，项目构建没有任何错误。

现在我们找到了依赖于 android 版本的包，我们必须排除该内部依赖于 android 版本。

我把compile 'com.sematext.android:sematext-logsene:1.0.0'改成了

compile ('com.sematext.android:sematext-logsene:1.0.0'){
    exclude group: 'com.google.android'
}

现在一切正常；但我仍在使用 OLD gradle 版本。 我回到 app\build.gradle 并将 gradle 版本恢复到 3.0.1

现在我解决了这个问题，仍然使用最新的 gradle。