我做了一个CI与Gitlab一扑应用程序，我有一个错误，当我的gradle初始化。
错误：
$ flutter packages get
Running "flutter packages get" in codingroomevents... 8.5s
$ flutter build apk --release
Initializing gradle...
ProcessException: Process "/builds/user/codingroomevents/android/gradlew" exited abnormally:
Downloading https://services.gradle.org/distributions/gradle-4.10.2-all.zip
Exception in thread "main" java.net.SocketException: Network is unreachable (connect failed)
提前致谢。
