You can do it any way you want, depending on the effect you want to achieve. People do it lots of different ways. I might consider a gridView (especially if you might need to scroll taller than the screen), or a variable that tracks which of several buttons is highlighted, then draw it differently in whatever way you choose. (That's what I did for Playtime—along with a timer-based blink effect.)
The SDK comes with some examples, including one for gridView. And many developers have shared useful code. This UI library may be overkill for you—or a big help: