"Not only should your apps stop relying on the hardware Menu button, but you should stop thinking about your activities using a “menu button” at all. Your activities should provide buttons for important user actions directly in the action bar (or elsewhere on screen). Those that can’t fit in the action bar end up in the
action overflow."
"
Action overflow button for legacy apps
If you’ve already developed an app to support Android 2.3 and lower, then you might have noticed that when it runs on a device without a hardware Menu button (such as a Honeycomb tablet or Galaxy Nexus), the system adds the action overflow button beside the system navigation.
This is a compatibility behavior for legacy apps designed to ensure that apps built to expect a Menu button remain functional. However, this button doesn’t provide an ideal user experience. In fact, in apps that don’t use an options menu anyway, this action overflow button does nothing and creates user confusion. So you should update your legacy apps to remove the action overflow from the navigation bar when running on Android 3.0+ and begin using the action bar if necessary. You can do so all while remaining backward compatible with the devices your apps currently support.
If your app runs on a device without a dedicated Menu button, the system decides whether to add the action overflow to the navigation bar based on which API levels you declare to support in the
<uses-sdk> manifest element."
Observera att länken går till Android bloggen som dem skrivit 2012 (!) vilket är 5 år sedan nu!
Källa:
https://android-developers.googleblog.com/2012/01/say-goodbye-to-menu-button.htmlClick to expand...