flutter单独运行android没问题，运行flutter项目就报找不到flutter

Launching lib\main.dart on SM G9209 in debug mode...

Initializing gradle...

Finished with error: ProcessException: Process "E:\android\flutter_project\flutter_app\android\gradlew.bat" exited abnormally:

Downloading https://services.gradle.org/distributions/gradle-4.10.2-all.zip

Exception in thread "main" java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 400 Bad Request"

at sun.net.www.protocol.http.HttpURLConnection.doTunneling(HttpURLConnection.java:2124)

at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:183)

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)

  Command: E:\android\flutter_project\flutter_app\android\gradlew.bat -v

现在才发现没写解决方法，根据提示可以看出就是gradle的问题，看一下flutter文件里面的gradle版本，应该是找不到，修改一下版本