What's the name of this drop-out menu?

i开发者_如何学Go've seen this cool kind of menu in different apps, so i guess it is part of the android SDK. but i could not figure out its name. anyone already used it and knows how to create it?

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We refer to it as the quick action bar, but it's not part of the SDK. The GreenDroid project provides an implementation of this component under Apache 2.0 license though.