Exception in thread "main" java.net.UnknownHostException: services.gradle.org at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:220) at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.base/java.net.Socket.connect(Socket.java:609) at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:289) at java.base/sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:173) at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182) at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:474) at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:569) at java.base/sun.net.www.protocol.https.HttpsClient.(HttpsClient.java:265) at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:372) at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:203) at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1187) at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081) at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:189) at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1592) at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1520) at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:250) 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) Running Gradle task 'assembleRelease'... 31.5s Gradle task assembleRelease failed with exit code 1

CodePudding user response：

When you cannot build in terminal, you should open XCode/Android Studio and build it. There are many things that cannot easily build in terminal. Example, a project can be configured production/dev mode, or configured with keychain (to submit on google play store), it is often builded on Android Studio. And then, if there's an error, it is also clearer if you build from terminal.

CodePudding user response：

The above error indicates a failure to download the Gradle version specified in your project's Gradle wrapper. I think your internet connection problem. Try running again with a different or faster internet connection.

You can follow this link https://github.com/flutter/flutter/issues/83597