title: Exception: Gradle task assembleDebug failed with exit code 1 when trying to run on android flutter
body: <p>When I try to run on an android real device or simulator it gives this in flutter .
  It is just the basic flutter example app , Everything is ok on flutter doctor , and it fails when I try flutter doctor --android-license</p>
  <pre><code>Exception in thread &quot;main&quot; java.net.UnknownHostException: services.gradle.org
  at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
  at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
  at java.net.Socket.connect(Socket.java:607)
  at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:666)
  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:463)
  at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
  at sun.net.www.protocol.https.HttpsClient.&lt;init&gt;(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:1162)
  at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
  at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect
  (AbstractDelegateHttpsURLConnection.java:177)
  at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1570)
  at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
  at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream
  (HttpsURLConnectionImpl.java:268)
  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)
  event sent after app closed: {id: 0, progressId: null, message: Running &quot;flutter pub get&quot;
  in socialapp...}
  event sent after app closed: {id: 0, progressId: null, finished: true}
  Launching lib/main.dart on SM N960F in debug mode...
  lib/main.dart:1
  Exception in thread &quot;main&quot; java.net.UnknownHostException: services.gradle.org
  Exception: Gradle task assembleDebug failed with exit code 1
  </code></pre>