Programmatically list all attributes from xmlns

given the namespace:

xmlns:android="http://ift.tt/nIICcg"

I want to list all possible attributes (eg. android:id, android:layout_width, etc) and store in a hashmap ("id", "layout_width", "layout_height", etc).

Is there a way to do that? Where do IDEs grab those attributes to suggest them?

Thanks.