Could not resolve com.android.support:appcompat-v7:26.1.0. => configure HTTP proxy
问题 I downloaded Android Studio 3.0 and I started following along building my first app tutorial. But Gradle threw errors like: Could not resolve com.android.support:appcompat-v7:26.1.0. I searched on SO for similar problems like this and that, but none of them helps me. Eventually I figured out that I'm using a proxy for Android Studio: To resolve the error, I have to implement the proxy for Gradle too, by adding these lines to gradle.properties file: systemProp.http.proxyHost=127.0.0.1