本文鏈接：https://blog.csdn.net/qq_33684444/article/details/86656301
Error running Gradle:
ProcessException: Process "D:\Android\APP path\flutter_app2\flutter_app2\android\gradlew.bat" exited abnormally:
> Configure project :app
Project evaluation failed including an error in afterEvaluate {}. Run with --stacktrace for details of the afterEvaluate {} error.
FAILURE: Build failed with an exception.
* Where:
Build file 'D:\Android\APP path\flutter_app2\flutter_app2\android\app\build.gradle' line: 25
* What went wrong:
A problem occurred evaluating project ':app'.
> Could not resolve all artifacts for configuration 'classpath'.
> Could not find com.android.tools.build:gradle:3.2.1.
Searched in the following locations:
- https://maven.aliyun.com/repository/jcenter/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom
- https://maven.aliyun.com/repository/jcenter/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.jar
- http://maven.aliyun.com/nexus/content/groups/public/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom
- http://maven.aliyun.com/nexus/content/groups/public/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.jar
Required by:
unspecified:unspecified:unspecified
* 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
BUILD FAILED in 3s
Picked up _JAVA_OPTIONS: -Djava.NET.preferIPv4Stack=true
Command: D:\Android\APP path\flutter_app2\flutter_app2\android\gradlew.bat app:properties
Please review your Gradle project setup in the android/ folder.
大致意思是說：運行Gradle時出錯，導致構建flutter構建失敗
原因是因爲獲取不到com.android.tools.build:gradle:3.2.1
原因一：
獲取不到的原因一般是因爲在中國沒辦法訪問谷歌資源（有外網，翻牆等的除外）
此時的解決辦法是 改用阿里的鏡像：
分兩步，
第一步：修改掉項目下的android目錄下的build.gradle文件，把google() 和 jcenter()這兩行去掉。
並在下面添加阿里的鏈接（注意：有兩處修改）
maven { url 'https://maven.aliyun.com/repository/google' }
maven { url 'https://maven.aliyun.com/repository/jcenter' }
maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }
第二步：修改Flutter SDK包下的flutter.gradle文件
路徑根據你的sdk存放位置，例如我的flutter.gradle（C:\flutter\packages\flutter_tools\gradle）
同樣將google() 和 jcenter()修改爲阿里的鏈接
maven { url 'https://maven.aliyun.com/repository/jcenter' }
maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }
至此，在國內沒辦法訪問谷歌資源的問題就解決了
然而，我的問題並沒解決
仔細看報錯信息後，發現找不到以下資源地址
- https://maven.aliyun.com/repository/jcenter/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom
- https://maven.aliyun.com/repository/jcenter/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.jar
- http://maven.aliyun.com/nexus/content/groups/public/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom
- http://maven.aliyun.com/nexus/content/groups/public/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.jar
看到這裏說明阿里鏈接是配置上了的，之所以找不到是因爲gradle-3.2.1這個3.2.1版本太高了，應該是最新的
阿里連接中的gradle最高版本好像才3.1.2，所以獲取不到
所以，解決辦法是將項目下的android目錄下的build.gradle文件和flutter SDK包下的flutter.gradle文件中的gradle版本改爲阿里鏡像中存在的版本
