Android emulator came with four predefined skins, I just noticed the skins in image folder but didn’t find a way to switch from default skin, while it was very easy. Every skin is based on transparent png images and using a layout file to describe images and positions.

To run the emulator with a different skin, use from command line :

emulator -skin HVGA-L

While HVGA-L is the skin ID, the available skins are :

QVGA-L 320×240, landscape (default)

QVGA-P 240×320, portrait

HVGA-L 480×320, landscape

HVGA-Q 320×480, portrait

From eclipse you can also run the emulator with a different skin, just goto run dialog -> select project -> in the right panel, select Emulator tab as shown in screenshot below :

Thanks to NuuNeoI and Dmitriy