我正在尝试开始一个新的扑动项目，我按照入门指南，安装android studio，flutter sdk，让设备工作，为VScode添加了颤动包 . 你可以在这里看到我的颤动医生输出：
D:\Workspace\flutter_app>flutter doctor -v
[√] Flutter (Channel beta, v0.8.2, on Microsoft Windows [Version 6.1.7601],
locale en-US)
• Flutter version 0.8.2 at C:\src\flutter
• Framework revision 5ab9e70727 (4 weeks ago), 2018-09-07 12:33:05 -0700
• Engine revision 58a1894a1c
• Dart version 2.1.0-dev.3.1.flutter-760a9690c2
[√] Android toolchain - develop for Android devices (Android SDK 28.0.3)
• Android SDK at C:\Users\baib37302\AppData\Local\Android\sdk
• Android NDK location not configured (optional; useful for native profiling
support)
• Platform android-28, build-tools 28.0.3
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-
b06)
• All Android licenses accepted.
[√] Android Studio (version 3.2)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin version 29.0.2
• Dart plugin version 181.5616
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-
b06)
[√] VS Code (version 1.27.2)
• VS Code at C:\Users\baib37302\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 2.19.0
[√] Connected devices (1 available)
• Android SDK built for x86 • emulator-5554 • android-x86 • Android 8.1.0
(API 27) (emulator)
• No issues found!
我在公司代理后面工作，但我将其添加到环境变量：HTTP_PROXY：http：//“user”：“pass”@proxy：8080
如你所见，一切看起来都很棒 . 唯一的问题是我无法运行该项目，因为运行"Flutter run"开始执行"flutter packages get"，由于连接到https://pub.dartlang.org时出现套接字错误而无法正常工作 . 正如你在这里看到的：
D:\Workspace\flutter_app>flutter packages get
Running "flutter packages get" in flutter_app...
Got socket error trying to find package node_preamble at
https://pub.dartlang.org.
pub get failed (69) -- attempting retry 1 in 1 second...
This issue comes up when trying to run from android studio or vs code.
I even tried getting pubscpec.lock file from an example project to try to work around this issue, but that failed as running "flutter install" ends up with gradle error as you can see in:
Flutter crash report; please file at https://github.com/flutter/flutter/issues.
## command
flutter install
## exception
String: Exit code 1 from: D:\Workspace\flutter_app\android\gradlew.bat -v:
Downloading https://services.gradle.org/distributions/gradle-4.4-all.zip
Exception in thread "main" java.net.UnknownHostException: services.gradle.org
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:673)
at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:173)
at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1138)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1032)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1546)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at org.gradle.wrapper.Download.downloadInternal(Download.java:58)
at org.gradle.wrapper.Download.download(Download.java:44)
at org.gradle.wrapper.Install$1.call(Install.java:61)
at org.gradle.wrapper.Install$1.call(Install.java:48)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)