While implementing Push Notifications, I get this error Could not resolve all dependencies for configuration

I’ve installed Google Play Services and Google Repository using SDK manager

and added the following dependencies in gradle file

dependencies {
   compile 'com.google.android.gms:play-services-gcm:7.0.0'
   ....
}

When I run the app, I see following error,

Could not resolve all dependencies for configuration ':library:_debugCompile'.
> Could not resolve com.android.support:support-v4:22.0.0.
Required by:
:library:unspecified > com.google.android.gms:play-services:7.0.0 > com.google.android.gms:play-services-base:7.0.0
> No cached version of com.android.support:support-v4:22.0.0 available for offline mode.

After searching solution for a while, I found the issue is due to this  “You need to make sure you have Android Support Repository up to date – that is where Android Support Library dependencies are resolved.”

So, I installed Android Support Repository,

and Rebuild app… Fixed the issue.

Hope it helps somebody..

ref link: http://stackoverflow.com/a/29569756/341443