Hava trouble synchronizing with gradle

[MajorGrinch]

I add the dependencies in gradle, but it stuck in Resolve dependencies ':app:_debugCompile'. I leave it for the whole night to resolve this. But when I checked it in the morning, it still stuck in the same status. How can I fix this? I use the default gradle wrapper without offline work. I've set up the proxy and I have no problem adding dependencies like android support.