void ReportScanFailure(int errMsgId, string errorMessage)
{
FingerprintManagerApiActivity activity = (FingerprintManagerApiActivity)_fragment.Activity;
activity.ShowError(errorMessage, string.Format("Error message id {0}.", errMsgId));
_fragment.Dismiss();
}
void ReportAuthenticationFailed()
{
FingerprintManagerApiActivity activity = (FingerprintManagerApiActivity)_fragment.Activity;
string msg = _fragment.Resources.GetString(Resource.String.authentication_failed_message);
activity.ShowError(msg);
_fragment.Dismiss();
}