android:scrollbarSize: Set the width of vertical scrollbars and height of horizontal scrollbars.
Ensure to change the minSDKVersion to 10, or greater.
android:scrollbarSize = "20px"
Related Articles:
Resources:
http://developer.android.com/reference/android/view/View.html#attr_android:scrollbarSize
http://developer.android.com/reference/android/R.attr.html#scrollbarSize
https://code.google.com/p/android/issues/detail?id=14317
http://en.wikipedia.org/wiki/Android_version_history
