android - Android X + Truth + Guava 测试编译问题
问题描述
api作为一个更大项目的一部分，我有一个 Android 库（称为）gradle 模块。我刚刚将整个项目迁移到 AndroidX。现在在apilib 上运行仪器测试时出现此错误：
Task :api:checkDebugAndroidTestDuplicateClasses FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':api:checkDebugAndroidTestDuplicateClasses'.
> 1 exception was raised by workers:
java.lang.RuntimeException: java.lang.RuntimeException: Duplicate class com.google.common.util.concurrent.ListenableFuture found in modules jetified-guava-25.1-android.jar (com.google.guava:guava:25.1-android) and listenablefuture-1.0.jar (com.google.guava:listenablefuture:1.0)
如果我检查debugAndroidTest变体的运行时类路径：
./gradlew api:dependencies --configuration debugAndroidTestRuntimeClasspath | grep --color -E "guava|$"
我得到这个输出。我可以看到问题：
------------------------------------------------------------
Project :api
------------------------------------------------------------
debugAndroidTestRuntimeClasspath - Resolved configuration for runtime for variant: debugAndroidTest
+--- project :test_utils
| +--- project :core
...
| +--- project :api (*)
| +--- com.google.android.material:material:1.1.0-alpha03
| | +--- androidx.annotation:annotation:1.0.1 -> 1.1.0-alpha01
| | +--- androidx.appcompat:appcompat:1.1.0-alpha01
| | | +--- androidx.annotation:annotation:1.0.0 -> 1.1.0-alpha01
| | | +--- androidx.core:core:1.1.0-alpha01 -> 1.1.0-alpha03
| | | | +--- com.google.guava:listenablefuture:1.0 // <------ GUAVA
| | | | +--- androidx.annotation:annotation:1.0.1 -> 1.1.0-alpha01
...
+--- com.google.truth:truth:0.42
| +--- com.google.guava:guava:25.1-android / <------ MORE GUAVA
| | +--- com.google.code.findbugs:jsr305:3.0.2
| | +--- com.google.errorprone:error_prone_annotations:2.1.3 -> 2.3.1
| | +--- com.google.j2objc:j2objc-annotations:1.1
| | \--- org.codehaus.mojo:animal-sniffer-annotations:1.14
| +--- org.checkerframework:checker-compat-qual:2.5.3
| +--- org.checkerframework:checker-qual:2.5.3
| +--- junit:junit:4.12 (*)
| +--- com.googlecode.java-diff-utils:diffutils:1.3.0
| +--- com.google.auto.value:auto-value-annotations:1.6.2
| \--- com.google.errorprone:error_prone_annotations:2.3.1
...
AndroidX 核心依赖于新的“仅 ListableFuture”构建的番石榴，而真相依赖于完整的番石榴 25。
我想我理解 ListenableFuture 的根本问题：https ://groups.google.com/forum/#!topic/guava-announce/Km82fZG68Sw
什么是正确的解决方案？
我不想完全将 Guava 从 Truth 中排除（否则 Truth 将无法编译）
androidTestImplementation("com.google.truth:truth:0.42") {
exclude group: 'com.google.guava', module: 'guava'
}
我可以通过使其成为一级依赖项来排除 + 强制更新 Guava 27：
androidTestImplementation("com.google.truth:truth:$rootProject.ext.truthVersion") {
exclude group: 'com.google.guava', module: 'guava'
}
// must add guava as top level dependency to force Truth to use latest version
androidTestImplementation 'com.google.guava:guava:27.0.1-android'
如果我这样做，我应该使用 android 或 JRE 版本的番石榴吗？
附带问题：
为什么在查看类路径时看不到番石榴依赖compile项？该错误是编译时错误，而不是运行时错误
./gradlew api:dependencies --configuration debugAndroidTestCompileClasspath | grep --color -E "guava|$"
产生的部门：
debugAndroidTestCompileClasspath - Resolved configuration for compilation for variant: debugAndroidTest
+--- project :test_utils // <----------- why are test_utils deps not listed here???
...
+--- com.google.truth:truth:0.42
| +--- com.google.guava:guava:25.1-android <------ GUAVA
| | +--- com.google.code.findbugs:jsr305:3.0.2
| | +--- org.checkerframework:checker-compat-qual:2.0.0 -> 2.5.3
| | +--- com.google.errorprone:error_prone_annotations:2.1.3 -> 2.3.1
| | +--- com.google.j2objc:j2objc-annotations:1.1
| | \--- org.codehaus.mojo:animal-sniffer-annotations:1.14
| +--- org.checkerframework:checker-compat-qual:2.5.3
| +--- org.checkerframework:checker-qual:2.5.3
| +--- junit:junit:4.12 (*)
| +--- com.googlecode.java-diff-utils:diffutils:1.3.0
| +--- com.google.auto.value:auto-value-annotations:1.6.2
| \--- com.google.errorprone:error_prone_annotations:2.3.1
...
+--- com.google.truth:truth:{strictly 0.42} -> 0.42 (c)
+--- com.google.guava:guava:{strictly 25.1-android} -> 25.1-android (c) // <--------- why is this listed again here at top level?
更新：
更新到 Truth 0.43 后，我现在看到此错误：
> Could not resolve all artifacts for configuration ':mymodule:debugAndroidTestRuntimeClasspath'.
> Could not resolve com.google.guava:listenablefuture:{strictly 1.0}.
Required by:
project :mymodule
> Cannot find a version of 'com.google.guava:listenablefuture' that satisfies the version constraints:
Dependency path 'example:mymodule:unspecified' --> 'com.google.truth:truth:0.43' --> 'com.google.guava:guava:27.0.1-android' --> 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'
Constraint path 'example:mymodule:unspecified' --> 'com.google.guava:listenablefuture:{strictly 1.0}' because of the following reason: debugRuntimeClasspath uses version 1.0
Dependency path 'example:mymodule:unspecified' --> 'example:myothermodule:unspecified' --> 'andrexampleoidx.core:core:1.1.0-alpha04' --> 'com.google.guava:listenablefuture:1.0'
Constraint path 'example:mymodule:unspecified' --> 'com.google.guava:listenablefuture:{strictly 1.0}' because of the following reason: debugRuntimeClasspath uses version 1.0
...
Dependency path 'example:mymodule:unspecified' --> 'example:myothermodule:unspecified' --> 'androidx.core:core:1.1.0-alpha04' --> 'androidx.concurrent:concurrent-futures:1.0.0-alpha02' --> 'com.google.guava:listenablefuture:1.0'
Constraint path 'example:mymodule:unspecified' --> 'com.google.guava:listenablefuture:{strictly 1.0}' because of the following reason: debugRuntimeClasspath uses version 1.0
...
> Could not resolve com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava.
Required by:
project :mymodule > com.google.truth:truth:0.43 > com.google.guava:guava:27.0.1-android
> Cannot find a version of 'com.google.guava:listenablefuture' that satisfies the version constraints:
Dependency path 'example:mymodule:unspecified' --> 'com.google.truth:truth:0.43' --> 'com.google.guava:guava:27.0.1-android' --> 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'
Constraint path 'example:mymodule:unspecified' --> 'com.google.guava:listenablefuture:{strictly 1.0}' because of the following reason: debugRuntimeClasspath uses version 1.0
Dependency path 'example:mymodule:unspecified' --> 'example:myothermodule:unspecified' --> 'androidx.core:core:1.1.0-alpha04' --> 'com.google.guava:listenablefuture:1.0'
...
Dependency path 'example:mymodule:unspecified' --> 'example:myothermodule:unspecified' --> 'androidx.core:core:1.1.0-alpha04' --> 'androidx.concurrent:concurrent-futures:1.0.0-alpha02' --> 'com.google.guava:listenablefuture:1.0'
Constraint path 'example:mymodule:unspecified' --> 'com.google.guava:listenablefuture:{strictly 1.0}' because of the following reason: debugRuntimeClasspath uses version 1.0
...
> Could not resolve com.google.guava:listenablefuture:1.0.
Required by:
project :mymodule > androidx.core:core:1.1.0-alpha04
project :mymodule > androidx.concurrent:concurrent-futures:1.0.0-alpha02
> Cannot find a version of 'com.google.guava:listenablefuture' that satisfies the version constraints:
Dependency path 'example:mymodule:unspecified' --> 'com.google.truth:truth:0.43' --> 'com.google.guava:guava:27.0.1-android' --> 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'
Constraint path 'example:mymodule:unspecified' --> 'com.google.guava:listenablefuture:{strictly 1.0}' because of the following reason: debugRuntimeClasspath uses version 1.0
...
Dependency path 'example:mymodule:unspecified' --> 'example:myothermodule:unspecified' --> 'androidx.core:core:1.1.0-alpha04' --> 'androidx.concurrent:concurrent-futures:1.0.0-alpha02' --> 'com.google.guava:listenablefuture:1.0'
Constraint path 'example:mymodule:unspecified' --> 'com.google.guava:listenablefuture:{strictly 1.0}' because of the following reason: debugRuntimeClasspath uses version 1.0
...
如果我理解正确：
- 真理 0.43 取决于番石榴 27
- Guava 27 依赖，
9999.0-empty因为它内部包含一个副本，ListenableFuture并且版本 9999.0-empty 是“空的”。 - AndroidX 核心等其他库依赖于
listenablefuture:1.0 - 解决冲突时（我应该使用版本 1.0 还是 9999.0？）Gradle 将选择最新版本，在本例中为 9999.0。
- 所以 AndroidX 核心实际上是通过 Guava 从类路径获取
ListenableFuture的，但这并不明智。 - 但是，
strictly关键字强制使用 1.0 - 发生这种情况是因为 Android Gradle 插件强制运行时和编译时类路径依赖于相同的版本 =(在此处阅读更多
所以目前我不知道现在该做什么。
解决方案
要解决冲突，只需添加对 Guava 27 的依赖就足够了。这样做应该会自动（尽管您链接的帖子中描述的“版本 99 不存在”黑客）防止第二个副本ListenableFuture被拉入。（如果没有，请告诉我们！）
由于您正在使用 Android 库，因此听起来您想要guava-27.0.1-android而不是-jre.
我对你的附带问题一无所知，对不起。并且很抱歉这么长时间没有回复。
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