新手用在 Android studio 使用 flutter 连接 virtual device 失败

[leegoo]

我创建了一个 virtual device ，点击运行时提示

Launching lib\main.dart on sdk gphone64 x86 64 in debug mode...
Running Gradle task 'assembleDebug'...
Exception in thread "main" java.net.ConnectException: Connection refused: connect
	at java.base/sun.nio.ch.Net.connect0(Native Method)
	at java.base/sun.nio.ch.Net.connect(Net.java:579)
	at java.base/sun.nio.ch.Net.connect(Net.java:568)
	at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:588)
	at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
	at java.base/java.net.Socket.connect(Socket.java:633)
	at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:304)
	at java.base/sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:174)
	at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:183)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:531)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:636)
	at java.base/sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:266)
	at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:380)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:193)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1242)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1128)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:179)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1665)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1589)
	at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:224)
	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)
Exception: Gradle task assembleDebug failed with exit code 1

但是我如果设备选择 chrome 就能运行。 找了一下资料，说要配置 flutter 的 Android SDK 目录。我也配置了。 系统是 windows10 ,Android studio 版本是 2022.2.1 Patch 2

PS E:\work_space\Android\flutter\myapp2> flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.10.6, on Microsoft Windows [版本 10.0.16299.15], locale zh-CN)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[√] Chrome - develop for the web
[X] Visual Studio - develop for Windows
    X Visual Studio not installed; this is necessary for Windows development.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components
[√] Android Studio (version 2022.2)
[√] Connected device (3 available)
[!] Network resources
    X A network error occurred while checking "https://pub.dev/": 由于套接字没有连接并且(当使用一个 sendto 调用发送数据报套接字时)没有提供地址，发送或接收数据的请求没有被接受。

    X A network error occurred while checking "https://storage.googleapis.com/": 远程计算机拒绝网络连接。

    X A network error occurred while checking "https://maven.google.com/": 远程计算机拒绝网络连接。

    X A network error occurred while checking "https://cocoapods.org/": 由于套接字没有连接并且(当使用一个 sendto 调用发送数据报套接字时)没有提供地址，发送或接收数据的请求没有被接受。

    X A network error occurred while checking "https://github.com/": 远程计算机拒绝网络连接。


! Doctor found issues in 2 categories.

[AoEiuV020JP]

不管怎样，先检查网络，代理，搞不清楚的情况最好全局挂梯子，

[leegoo]

@AoEiuV020JP 这玩意还需要走代理吗。我理解我本地创建了一个虚拟设备，为什么还要走代理..

[AoEiuV020JP]

@leegoo #2 你贴的报错是网络相关，压根没到连接模拟器这一步，所以让你检查网络，
有代理就关闭代理试试，没代理就翻个墙试试，谷歌家的东西需要科学上网很正常，

[WolfG]

这个是编译的时候 Gradle 在下载依赖出的网络错误吧

[leegoo]

@AoEiuV020JP
@WolfG 还真是，挂个梯子就好了，感谢！

[jifengg]

另外，测试或编译报错，建议在 flutter 的命令上加 “-v”，能够清楚知道什么地方报错了