OverlayClose

OverlayEntry _buildOverlayFeedback(BuildContext context, String tituloEvento) {
  return OverlayEntry(
    builder: (context) => Material(
      child: Container(
        width: double.infinity,
        height: double.infinity,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Column(
              children: <Widget>[
                ListTile(
                  leading: Icon(Icons.sentiment_dissatisfied),
                  title: Text('No me ha gustado'),
                  onTap: () {
                  },
                ),
                ListTile(
                    leading: Icon(Icons.sentiment_very_satisfied),
                    title: Text('Muy bien'),
                    onTap: () {}),
              ],
            ),
          ],
        ),
      ),
    ),
  );
}