NoticeInkWell.dart

 @override
  Widget build(BuildContext context) {
    this._context = context;

    //Foi adicionado dentro de Container para adicionar margem no item
    return new Container(
      margin: const EdgeInsets.only(
      left: 10.0, right: 10.0, bottom: 10.0, top: 0.0),
      child: new Material(
          borderRadius: new BorderRadius.circular(6.0),
          elevation: 2.0,
          child: new InkWell(
            onTap: showDetail,
            splashColor: Colors.blue,
            child: _getListTile(),
          ),
        ),
    );
  }

  showDetail() {
    Navigator
    .of(_context)
    .push(new MaterialPageRoute(builder: (BuildContext context) {
      return new Detail(_img, _title, _date, _description);
    }));
  }