NoticeComplete.dart

import 'package:flutter/material.dart';
import 'package:flutter_tutorial_medium/Detail.dart';

class Notice extends StatelessWidget {
  var _img;
  var _title;
  var _date;
  var _description;

  Notice(this._img, this._title, this._date, this._description);

  BuildContext _context;

  @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(),
          ),
        ),
    );
  }

  Widget _getListTile() {
    // Foi adicionado dentro de Container para adicionar altura fixa.
    return new Container(
      height: 95.0,
      child: new Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          new Image.network(_img, fit: BoxFit.cover, width: 95.0, height: 95.0),
          _getColumText(_title, _date, _description),
        ],
      ),
    );
  }

  Widget _getColumText(tittle, date, description) {
    return new Expanded(
        child: new Container(
      margin: new EdgeInsets.all(10.0),
      child: new Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          _getTitleWidget(_title),
          _getDateWidget(_date),
          _getDescriptionWidget(_description)
        ],
      ),
    ));
  }

  Widget _getTitleWidget(String curencyName) {
    return new Text(
      curencyName,
      maxLines: 1,
      style: new TextStyle(fontWeight: FontWeight.bold),
    );
  }

  Widget _getDescriptionWidget(String description) {
    return new Container(
      margin: new EdgeInsets.only(top: 5.0),
      child: new Text(
        description,
        maxLines: 2,
      ),
    );
  }

  Widget _getDateWidget(String date) {
    return new Text(
      date,
      style: new TextStyle(color: Colors.grey, fontSize: 10.0),
    );
  }

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

}