Values specified here will be used to generate an Android emulator on-the-fly, if one doesn't already exist with the given properties. Note that each emulator may consume anywhere from 30 to 80MB of disk space on the build host.

Each property will autocomplete to the standard Android SDK values, or you can provide custom values, e.g. if you have additional platforms defined or want to use a custom resolution.

You can also do environment variable substitution for any of these properties, in the format: ${VARIABLE_NAME} or $VARIABLE_NAME.

For example, if you have configured a matrix build to include a "density" axis with values "120 160 240", you could enter ${density} for the "Screen density" property below and the appropriate substitution would be made when each individual build is executed.

Emulators are stored in the usual $HOME/.android/avd directory, named in the format: hudson_[locale]_[density]_[resolution]_[target].
For example: hudson_en-GB_160_HVGA_android-7 for a British English, medium density, HVGA device running Android 2.1.