android - 如何在 Unity 项目中查找和修复 android 构建失败“：transformClassesWithMultidexlistForRelease”的来源

Question

这款游戏已经推出好几年了，积累了很多旧的依赖，比如旧版本的 Swrve、IronSource、Crashlytics（使用 Fabric）、Facebook 等。我正在更新它们，这导致了各种冲突和构建失败。

我被困在这个最新的构建失败中：

Execution failed for task ':transformClassesWithMultidexlistForRelease'.
> com.android.build.api.transform.TransformException: Error while generating the main dex list.

这不是很具体，但我确实考虑过确保为项目启用了 multidex（它是，如果我关闭它，我会得到一个不同的错误，很明显超过单个 DEX 的方法数）。

我导出了一个 gradle 项目并尝试从命令行构建，使用该--debug选项了解更多详细信息。请注意，我无法使用系统 gradle (v6.6)，因为 Unity 生成的项目版本使用了已弃用的功能 (v5.1.1)。相反，我为 Unity 使用的内部 gradle 命令创建了一个别名。我提取了这里失败的部分。

01:38:01.777 [INFO] [com.android.build.gradle.internal.transforms.D8MainDexListTransform] Generating the main dex list using D8.
01:38:01.778 [INFO] [com.android.build.gradle.internal.transforms.D8MainDexListTransform] Program files:

 /Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/unity-android-resources/build/intermediates/intermediate-jars/release/classes.jar
/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/f1a15ce9a3a238f913b1713c5b7eef8e/jars/classes.jar
/Users/turkeybash/.gradle/caches/modules-2/files-2.1/androidx.arch.core/core-common/2.0.0/bb21b9a11761451b51624ac428d1f1bb5deeac38/core-common-2.0.0.jar
/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/eafba0cd0d7e84442d378b6269357dc1/jars/classes.jar
/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/IronSource/libs/hyprmxadapter.jar
/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/6673f931a57b5dd7ba35e730131945d3/jars/classes.jar
/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/f723d303fde323253ef3670a7230198e/jars/classes.jar
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/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/78542fe719422e18a588a7947da0926f/jars/classes.jar
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/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/75cf5c04b9976659a3ef67ac8d77f145/jars/classes.jar
/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/Firebase/build/intermediates/intermediate-jars/release/classes.jar
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/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/2790e9d931fe828f07667e1b0bc06ce1/jars/classes.jar
/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/IronSource/libs/admobadapter.jar
/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/IronSource/build/intermediates/intermediate-jars/release/classes.jar
/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/SwrveSDKPushSupport/bin/classes.jar
/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/34cbd0f86be48cda79884cdf97c39407/jetified-bolts-applinks-1.4.0.jar
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/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/IronSource/libs/android-bridge.jar
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/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/607ef9c8e817a0307715c3b318067023/jetified-applovinadapter.jar
/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/IronSource/libs/adcolonyadapter.jar
/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/ec1f3eb9bae4e8df758580a267cdd167/jars/classes.jar
/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/build/intermediates/javac/release/compileReleaseJavaWithJavac/classes
/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/libs/com.google.auto.value-auto-value-annotations-1.6.5.jar
/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/9d61fe2e60187d2e21fe7ff3edf8bd1d/jars/classes.jar
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/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/b40c7cdba61144dc341675e388f49dc5/jars/classes.jar
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/Users/turkeybash/Perforce/uname_dependencies/client/Builds/Game/android/Mimetime_gradle2.apk/Star Horse/libs/in-app-purchasing-1.0.3.jar
/Users/turkeybash/.gradle/caches/transforms-2/files-2.1/15c5ef78ac2873e0e55b2095be4d970e/jars/classes.jar
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01:38:01.778 [INFO] [com.android.build.gradle.internal.transforms.D8MainDexListTransform] Library files: /Users/turkeybash/Library/Android/sdk/platforms/android-28/android.jar
/Users/turkeybash/Library/Android/sdk/platforms/android-28/optional/org.apache.http.legacy.jar
/Users/turkeybash/Library/Android/sdk/platforms/android-28/optional/android.test.mock.jar
/Users/turkeybash/Library/Android/sdk/platforms/android-28/optional/android.test.base.jar
/Users/turkeybash/Library/Android/sdk/platforms/android-28/optional/android.test.runner.jar

使用 gradle 的--stacktrace选项产生了以下结果。

com.android.builder.multidex.D8MainDexList$MainDexListException: 
com.android.tools.r8.errors.CompilationError: 
Program type already present: com.google.auto.value.extension.memoized.Memoized
        at com.android.builder.multidex.D8MainDexList.generate(D8MainDexList.java:87)

所以解决它似乎是找出哪些依赖项正在使用这个程序的问题。我不确定那时我会做什么，因为这些都是预编译的外部库。我也不知道如何找到哪些特定的依赖项拥有它。

标签： androidunity3dgradlebuildandroid-multidex

Answer 1

我最终通过编写一个实用程序来解决这个问题，该实用程序遍历 .apk 目录的内容，找到 .jar 和 .aar 文件，并将它们解压缩到子目录中。这也可以手动完成，无需脚本。Mimetime_gradle2.apk/Star Horse/您会在此项目中包含的日志行中看到对这些文件的引用。

解压缩所有这些之后，只需递归地搜索父目录以查找对使用 --stacktrace 的 gradle 命令输出中调用的库的引用。在这种情况下，它是com.google.auto.value.extension.memoized.Memoized

然后只需从 Unity 项目中删除包含它的库之一即可。在这种情况下，它是另一个库的过时副本，包含在ExternalDependencyManager.

难点在于你需要从 Unity 构建菜单中导出一个 gradle 项目，而不是直接构建 APK。然后，您需要为特定版本的 Unity 使用的特定 gradle 版本复制命令，并使用 --stacktrace 选项运行它，以获得识别重复包所需的输出。然后，您可以解压缩生成的构建目录（代替 APK 文件）并在其中搜索有问题的包。