Demo now consists of two activities:
- DeviceListActivity shows all usb devices (including unsupported ones)
in a ListView.
- SerialConsoleActivity dumps the data stream for a device selected in
DeviceListActivity.
acquire() is renamed and deprecated in favor of findFirstDevice().
findAllDevices() is added as new functionality.
Internally, probe() now returns a list, allow a (future) multi-port
device to return multiple drivers, one for each port (googlecode
issue #14).
