flutter 環境剛剛配置好，運行第一個程序就跑不起來
問題
ProcessException: Process "D:\ZZTFlutter\flutter_app\android\gradlew.bat" exited abnormally:
* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all artifacts for configuration ':classpath'.
> Could not resolve org.glassfish.jaxb:jaxb-runtime:2.2.11.
Required by:
project : > com.android.tools.build:gradle:3.2.1 > com.android.tools.build:builder:3.2.1 > com.android.tools:sdklib:26.2.1 > com.android.tools:repository:26.2.1
> Could not resolve org.glassfish.jaxb:jaxb-runtime:2.2.11.
> Could not get resource 'https://dl.google.com/dl/android/maven2/org/glassfish/jaxb/jaxb-runtime/2.2.11/jaxb-runtime-2.2.11.pom'.
> Could not HEAD 'https://dl.google.com/dl/android/maven2/org/glassfish/jaxb/jaxb-runtime/2.2.11/jaxb-runtime-2.2.11.pom'.
> Read timed out
flutter 下載依賴庫出錯
原因是因為獲取不到com.android.tools.build:gradle:3.2.1
原因一：
獲取不到的原因一般是因為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' }
flutter SDK 中也需要配置
D:\Program Files\Flutter\flutter_sdk\packages\flutter_tools\gradle
再次運行就解決了
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原文鏈接：https://blog.csdn.net/zhu576558203/article/details/102531289