Sorry for the inconvenience. We haven't had a chance to update all of 
our documentation fully yet. 4.1.0 made some changes to the way that 
XML layouts work. In particular, you shouldn't need attrs.xml anymore. 
Try the following and let me know if it works (or more importantly if 
it doesn't): 

1) Remove attrs.xml (or if you need it for your own custom attributes, 
remove the parts related to AdViews). 
2) Change the namespace in your layout from xmlns:ads="http:// 
schemas.android.com/apk/res/com.your.packagename" 
    to xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads" 

Also, in the simplest of cases, where your code simply does 
AdView.loadAd(new AdRequest()), there's a new XML attribute to make 
your code even simpler. Adding ads:loadAdOnCreate="true" should call 
loadAd(new AdRequest()) for you when the ad is inflated from the XML. 
This means that the simplest of cases just got simpler because it 
requires no code at all (no finding the view from the layout just to 
call loadAd with a blank ad request). Obviously keep in mind though 
that using this method means you have less control over your ads like 
when requests occur, and what goes in them. 

We think this will be easier in the long run since you won't have to 
create the attrs.xml file. Again, sorry for the inconvenience and 
thanks for your patience. 

Thanks, 
-Tim 

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