我发表了以下评论:
./gradlew app:installDebug
只是遇到了日志:
FAILURE: Build failed with an exception.
* What went wrong:
Could not determine java version from '11.0.2'.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
* Get more help at https://help.gradle.org
我的gradle版本是5.1.1:
------------------------------------------------------------
Gradle 5.1.1
------------------------------------------------------------
Build time: 2019-01-10 23:05:02 UTC
Revision: 3c9abb645fb83932c44e8610642393ad62116807
Kotlin DSL: 1.1.1
Kotlin: 1.3.11
Groovy: 2.5.4
Ant: Apache Ant(TM) version 1.9.13 compiled on July 10 2018
JVM: 11.0.2 (Oracle Corporation 11.0.2+9-LTS)
OS: Mac OS X 10.13.6 x86_64
我不知道如何继续(我尝试过升级/降级，但到目前为止都没有工作)。
更新:当我运行。/gradlew——版本，我得到以下:
FAILURE: Build failed with an exception.
* What went wrong:
Could not determine java version from '11.0.2'.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
* Get more help at https://help.gradle.org
我的…/ gradle /包装/ gradle-wrapper。properties包含以下内容，包括distributionUrl=…/gradle-4.1-rc-1-all.zip:
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-rc-1-all.zip
以我为例，我试图为一个旧的Unity 3D项目构建和获得APK(这样我就可以在我的Android手机上玩游戏)。我使用的是最新的Android Studio版本，我可以通过Android Studio的SDK管理器下载所有SDK包。SDK包的位置
C:/Users/Onat/AppData/Local/Android/Sdk
我得到的错误消息是一样的，除了JDK (Java开发工具包)版本“JDK -12.0.2”。JDK位于
C:\Program Files\Java\jdk-12.0.2
Windows中的环境变量为JAVA_HOME: C:\Program Files\Java\jdk-12.0.2
经过3个小时的研究，我发现Unity不支持JDK 10。我的建议是:
Uninstall unwanted JDK if you have one installed already.
Head here
Login to/Open a Oracle account if not already logged in.
Download the older but functional JDK 8 for your computer set-up(32 bit/64 bit, Windows/Linux etc.)
Install the JDK. Remember the installation path.
If you are using Windows, Open Environment Variables and change Java Path via Right click My Computer/This PC>Properties>Advanced System Settings>Environment Variables>New>Variable Name: JAVA_HOME>Variable Value: [YOUR JDK Path, Mine was "C:\Program Files\Java\jdk1.8.0_221"]
In Unity 3D, press Edit > Preferences > External Tools and fill in the JDK path (Mine was "C:\Program Files\Java\jdk1.8.0_221").
Also, in the same pop-up, edit SDK Path. (Get it from Android Studio > SDK Manager > Android SDK > Android SDK Location.)
If needed, restart your computer for changes to take effect.
在您的系统中有两个不同的Gradle应用程序。
系统级的Gradle
此应用程序由gradle(参数)调用。
的gradle-wrapper
gradle-wrapper是特定于每个项目的，并且只能在项目目录内调用，使用./gradlew命令(参数)。
您的系统级gradle版本是5.1.1(如注释中解释的OP，运行命令gradle——version返回版本5.1.1)。
然而，失败是调用gradle-wrapper (./gradlew)的结果。你能检查你的项目的gradle包装版本吗?要做到这一点，在项目文件夹中执行。/gradlew——version，在gradlew和gradlew.bat文件所在的目录中。
更新1:
当运行./gradlew——version failed时，你可以通过打开文件手动检查包装器的版本:
(项目的根文件夹)/gradle/wrapper/gradle-wrapper.properties
一个简单的文本编辑器。内部的“distributionUrl”应该告诉我们包装器的版本是什么。
更新2:
根据OP的更新问题，gradle-wrapper的版本是4.1RC1。
Gradle在Gradle 5.0中增加了对JDK 11的支持。因此，由于4.1RC不支持在JDK 11上运行，这肯定是一个问题。
The obvious way, would be to update your project's gradle-wrapper to version 5.0.
However, before updating, try running gradle app:installDebug. This will use your system-wide installed Gradle whose version is 5.1.1 and supports running on Java 11. If this works, then your buildscript (file build.gradle) is not affected by any breaking changes between v.4.1RC1 and v.5.1.1 and you can then update your wrapper by executing from the command line inside your project's folder: gradle wrapper --gradle-version=5.1.1 [*].
如果gradle app:installDebug不能正确执行，那么也许你需要升级你的gradle构建脚本。为了从v.4.1RC1升级到5.1.1,Gradle项目提供了一个指南(1,2)，其中包含了小版本之间的重大变化和已弃用的特性，这样你就可以逐步升级到最新版本。
或者，如果出于某种原因你不能或不想升级你的Gradle构建脚本，你总是可以选择将你的Java版本降级到Gradle 4.1RC1支持运行的版本。
[*] As correctly pointed out in the answer by @lupchiazoem, use gradle wrapper --gradle-version=5.1.1 (and not ./gradlew as I had originally posted there by mistake). The reason is Gradle runs on Java. You can update your gradle-wrapper using any working Gradle distribution, either your system-wide installed Gradle or the gradle-wrapper itself. However, in this case your wrapper is not compatible with your installed Java version, so you do have to use the system-wide Gradle (aka gradle and not ./gradlew).
