Android : Custom buttonbar with overflow menu in Android

In my app, I want to show some buttons in a LinearLayout that expands over whole width of the screen. Depending on screen size and/or orientation, I would like to hide those buttons, that don't fit in the row, in some OverflowMenu, similar to the behaviour of the ActionBar. If possible, I would like to describe the buttons in a menu resource file with the ifRoom|always attributes.

I considered displaying a Toolbar from the latest AppCompat library, but that contains too many elements that I don't need and don't know how to turn off.

Is there some library or simple way to do this?