Hi,
Yes its true that at the current released version, we don't support emulator. The main reason for this is because the ArcGIS Runtime SDK for Android uses OpenGL ES 2.0 technology to render map images. This technology makes the product much more versatile and usable by reducing the memory footprint, dramatically improving rendering speeds and using less power. Currently Google�??s Android Emulator does not support running applications that utilize OpenGL ES 2.0 functionality. We are following the development of this support from Google and hope that it is supported soon.
Regards.