I hate to be the third person to ask this, but the previous two askings haven\'t seemed to answer it fully. The android design guidelines detail borderless buttons, but not how
Just incase anybody is looking for light-weight solution to get the borderless button for the API's that do not support the Holo theme (like I did for a long time), Im posting my solution below:
All you have to do is change the colours and text to suit your own background. All the best!