Wish some views on designer have no background attr

some views on designer have no background attr
AutoCompleteEditText
EditText
ToggleButton

wish to add them.

The reason that this property is not exposed is that these views use a nine-patch (or other more sophisticated) drawable as there background.

So there is no simple way to change the background color of these views. You need to create a different image if you want to change the color.