How To Access Android / Tag XML Attribute From Code

I set the tag attribute on a custom widget in my layout XML:

Code:
<com.louisvillemade.thegirlyapp.widgets.GirlySeekBar
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="40dp"
android:layout_marginRight="40dp"
android:layout_marginBottom="16dp"
android:gravity="center"
android:layout_gravity="center"
android:max="19"
android:tag="attr_2"
android:progress="0"

[code]....

How do I grab some of the XML elements, like the android:tag element (set to "attr_2") through reflection of seekBar? Calling seekBar.getTag() returns null and I can't seem to find any methods on the Drawable that will give me what I want.