I'm trying to run a "hello world" application in android studio. My connection is via proxy. When I try run the "hello world app", android studio show me the next error:
Error running Prueba: Gradle project sync failed. Please fix your project and try again.
If I configure in: "File/setting -> HTTP Proxy" and next put my proxy configuration, the error is the next:
Error:Could not GET 'http://jcenter.bintray.com/com/android/tools/build/gradle/0.12.2/gradle-0.12.2.pom'. Received status code 407 from server: Proxy Authentication Required ( The ISA Server requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )
<a href="toggle.offline.mode">Enable Gradle 'offline mode' and sync project</a>
How can I fix that error?
There error indicates that proxy authentication is needed. To authenticate to your proxy server go back to File->Setting->HTTP Proxy, check the box for Proxy authentication and enter your credentials there. Also, click the check connection button to test that your connection is successful.
In Android Studio 1.4 there are two places, the proxy must be configured: First in Android Studio like Mike described in his answer. And second in the external SDK Manager:
Android Studio | Tools | Android | SDK-Manager | Launch Standalone SDK Manager | Tools | Options
After setting the proxy in the SDK Manager, too, the issue was fixed.
来源：https://stackoverflow.com/questions/26916951/how-to-use-a-proxy-connection-with-android-studio