I successfully created a custom rich notification for Android >= 3.0 that shows some text and an additional button. If you click the notification anywhere but on the button in the notification drop-down, the notification is dismissed, the drop-down closed and the specified Intent is launched as expected. If the dedicated button in the notification is clicked, a different Intent is successfully launched, but the drop-down keeps open (and the notification is still there, but I cancel it later, that …
notifications android android-3.0-honeycomb android-4.0-ice-cream-sandwich