Android Studio升級到最新版3.6.1後，新建了個項目，發現無法執行Java類的main方法，很蛋疼。試了網上的各種方法，比如切換gradle離線模式、gradle.properties中添加android.enableAapt2=false等，我還嘗試了重新情況Gradle緩存、重新下載gradle等方式，都沒用。
環境
android studio版本：3.6.1
gradle版本：5.6.4
gradle插件版本：3.6.1
錯誤提示
11:41:35 PM: Executing task 'TxtUtil.main()'...
Executing tasks: [TxtUtil.main()] in project /Users/tinytongtong/Documents/workspace/as/self/BlogDemo
FAILURE: Build failed with an exception.
* Where:
Initialization script '/private/var/folders/qw/8_p1t59142d0xntgn799rt1c0000gn/T/TxtUtil_main__.gradle' line: 20
* What went wrong:
A problem occurred configuring project ':app'.
> Could not create task ':app:TxtUtil.main()'.
> SourceSet with name 'main' not found.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/5.6.4/userguide/command_line_interface.html#sec:command_line_warnings
BUILD FAILED in 207ms
11:41:35 PM: Task execution finished 'TxtUtil.main()'.
解決方案：
方案一：暫時的替代方案
Run "XXX.main()" with Coverage
1
方案二：修改.idea/gradle.xml文件
Android Studio使用gradle作爲構建工具，所以歸根到底還是gradle配置的問題。我先找一個沒問題的項目，再打開新創建的項目，對比着看他們的gradle配置。經過對比和嘗試，發現.idea/gradle.xml文件內部不同，並且參照老項目進行修改是有效的。
老項目的.idea/gradle.xml：
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="GradleMigrationSettings" migrationVersion="1" />
<component name="GradleSettings">
<option name="linkedExternalProjectsSettings">
<GradleProjectSettings>
<option name="delegatedBuild" value="false" />
<option name="testRunner" value="PLATFORM" />
<option name="distributionType" value="DEFAULT_WRAPPED" />
<option name="externalProjectPath" value="$PROJECT_DIR$" />
<option name="modules">
<set>
<option value="$PROJECT_DIR$" />
<option value="$PROJECT_DIR$/app" />
...
</set>
</option>
<option name="resolveModulePerSourceSet" value="false" />
</GradleProjectSettings>
</option>
</component>
</project>
新項目的.idea/gradle.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="GradleMigrationSettings" migrationVersion="1" />
<component name="GradleSettings">
<option name="linkedExternalProjectsSettings">
<GradleProjectSettings>
<option name="testRunner" value="PLATFORM" />
<option name="distributionType" value="DEFAULT_WRAPPED" />
<option name="externalProjectPath" value="$PROJECT_DIR$" />
<option name="modules">
<set>
<option value="$PROJECT_DIR$" />
<option value="$PROJECT_DIR$/app" />
</set>
</option>
<option name="resolveModulePerSourceSet" value="false" />
</GradleProjectSettings>
</option>
</component>
</project>
經過對比發現，新項目的<GradleProjectSettings>標籤下少了<option name="delegatedBuild" value="false" />這行配置，然後給新項目添加這行配置，運行代碼發現成功了。
根據配置的字面意思理解，這個設置的意思是不委託gradle進行構建。現實效果也是加了這行配置之後就是jvm執行Java類的main方法了，而不是gradle當做task來執行了。
個人能力有限，如有錯誤盡請指正。
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版權聲明：本文爲CSDN博主「tinyvampirepudge」的原創文章，遵循 CC 4.0 BY-SA 版權協議，轉載請附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/qq_26287435/article/details/104749689