How do I open native google plus app from inside my app for android?

Question

I want users to be able to share a url link on google plus from inside my as3 app using navigateToUrl, but I want the native google plus app to open up, not go through mobile web browser. I am using the as3 function below for iOS which works perfectly fine:

function shareOnGooglePlus(event:Event):void {
    var request:URLRequest = new URLRequest("gplus://plus.google.com/share?url=" + URL_LINK);
    navigateToURL(request, "_blank")
}

This function just isn't doing anything on android and I don't know why. Does anyone have any ideas on this?

Thanks in advance