How to remove button line in Spinner?

I used a spinner to display a list:

At the bottom of the list, there is this grey line. How i can remove it programatically开发者_运维百科??

Thanks

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That only seems to appear on the HTC Evo, I'm not sure why it's there, but it's not something that I know of a work around for. If you run the same app on another device it should be fine. Hopefully this is something that will be fixed in an update.