What is this called in Android (see picture)?

I开发者_开发技巧 would like to know how the green plus sign in the following picture is called:

Thanks in advance for your help!

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Could you clarify the question a little bit? Do you want the name of the drawable? It's a probably an ImageButton with a custom circle background.

It's a standard Android drawable - ic_input_add

Here is the whole list of drawables: http://androiddrawableexplorer.appspot.com/

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This is an ImageView. Maybe a FrameLayout. Please consider accepting some more answers.