BottomSheet

Center(
  child: RaisedButton(
    child: const Text('SHOW BOTTOM SHEET'),
    onPressed: () {
      showModalBottomSheet<void>(context: context, builder: (BuildContext context) {
        return Container(
          child: Padding(
            padding: const EdgeInsets.all(32.0),
            child: Text('This is the modal bottom sheet. Slide down to dismiss.',
              textAlign: TextAlign.center,
              style: TextStyle(
                color: Theme.of(context).accentColor,
                fontSize: 24.0,
              ),
            ),
          ),
        );
      });
    },
  ),
)