selectDevice function

Implementation

Future<String?> selectDevice(BuildContext context) async {
  final availablePorts = findConnectedDevices();
  ScaffoldMessenger.of(context).removeCurrentSnackBar();
  if (availablePorts.isEmpty) {
    ScaffoldMessenger.of(context).showSnackBar(
      const SnackBar(
        content: Text('No Recorder found. Have you connected it?'),
      )
    );
    return null;
  }
  else {
    return showDialog<String?>(
      context: context,
      builder: (BuildContext context) {
        return SimpleDialog(
          title: const Text('Select Device'),
          children: <Widget>[
            for (final address in availablePorts)
              buildOption(address, context)
          ],
        );
      }
    );
  }
}