Android :: How To Apply Another Style When Button Is In Another State?

I created button with some shadow using a style:
<style name="test">
<item name="android:shadowColor">#FFFFFF</item>
<item name="android:shadowRadius">1</item>
<item name="android:shadowDx">1</item>
<item name="android:shadowDy">1</item>
</style>
This applies a white shadow on the button's text in its normal state. I was just wondering if anyone knows if there is a way to remove this shadow when the button is a pressed state. In other words, is there a way to apply another style when the button is in another (pressed) state?