Button states pressed / selected (Android)

I'm working on a Android project. I need to design 5 states of a button:

  • normal
  • focused
  • selected
  • pressed
  • disabled.

I do not understand the difference between pressed and selected. I have found that explanation:

Pressed – when a widget such as a button is clicked
Selected – when a widget is activated, such as the active tab on a tab control.

If a button is clicked/pressed, it is activated, not selected, that is right?

Unfortunately I'm working without the Android SDK for testing.

Can anyone explain that to me? Thanks

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