Created
September 4, 2018 16:40
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import 'package:flutter/material.dart'; | |
import 'Notice.dart'; | |
import 'NewsApi.dart'; | |
class NoticeList extends StatefulWidget{ | |
final state = new _NoticeListPageState(); | |
@override | |
_NoticeListPageState createState() => state; | |
} | |
class _NoticeListPageState extends State<NoticeList>{ | |
List _categorys = new List(); | |
var _category_selected = 0; | |
List _news = new List(); | |
var repository = new NewsApi(); | |
var _currentIndex = 0; | |
@override | |
Widget build(BuildContext context) { | |
return new Scaffold( | |
appBar: new AppBar(), | |
body: new Container( | |
child: new Column( | |
children: <Widget>[ | |
_getListCategory(), | |
new Expanded( | |
child: _getListViewWidget(), | |
) | |
], | |
), | |
), | |
bottomNavigationBar: _getBottomNavigationBa(), | |
); | |
} | |
@override | |
void initState() { | |
setCategorys(); | |
loadNotices(); | |
} | |
Widget _getBottomNavigationBa() { | |
return new BottomNavigationBar( | |
onTap: onTabTapped, // new | |
currentIndex: _currentIndex, // new | |
type: BottomNavigationBarType.fixed, | |
items: [ | |
new BottomNavigationBarItem( | |
icon: const Icon(Icons.home), | |
title: Text('Recentes'), | |
backgroundColor: Colors.green | |
), | |
new BottomNavigationBarItem( | |
icon: const Icon(Icons.list), | |
title: Text('Notícias'), | |
backgroundColor: Colors.blue[800] | |
), | |
new BottomNavigationBarItem( | |
icon: const Icon(Icons.info), | |
title: Text('Sobre'), | |
backgroundColor: Colors.red | |
) | |
], | |
); | |
} | |
void onTabTapped(int index) { | |
setState(() { | |
_currentIndex = index; | |
}); | |
} | |
Widget _getListViewWidget(){ | |
var list = new ListView.builder( | |
itemCount: _news.length, | |
padding: new EdgeInsets.only(top: 5.0), | |
itemBuilder: (context, index){ | |
return _news[index]; | |
} | |
); | |
return list; | |
} | |
loadNotices() async{ | |
List result = await repository.loadNews(); | |
setState(() { | |
result.forEach((item) { | |
var notice = new Notice( | |
item['url_img'], | |
item['tittle'], | |
item['date'], | |
item['description'] | |
); | |
_news.add(notice); | |
}); | |
}); | |
} | |
void setCategorys() { | |
_categorys.add("Geral"); | |
_categorys.add("Esporte"); | |
_categorys.add("Tecnologia"); | |
_categorys.add("Entretenimento"); | |
_categorys.add("Saúde"); | |
_categorys.add("Negócios"); | |
} | |
Widget _getListCategory(){ | |
ListView listCategory = new ListView.builder( | |
itemCount: _categorys.length, | |
scrollDirection: Axis.horizontal, | |
itemBuilder: (context, index){ | |
return _buildCategoryItem(index); | |
} | |
); | |
return new Container( | |
height: 55.0, | |
child: listCategory, | |
); | |
} | |
Widget _buildCategoryItem(index){ | |
return new GestureDetector( | |
onTap: (){ | |
onTabCategory(index); | |
}, | |
child: new Center( | |
child: new Container( | |
margin: new EdgeInsets.only(left: 10.0), | |
child: new Material( | |
elevation: 2.0, | |
borderRadius: const BorderRadius.all(const Radius.circular(25.0)), | |
child: new Container( | |
padding: new EdgeInsets.only(left: 12.0,top: 7.0,bottom: 7.0,right: 12.0), | |
color: _category_selected == index ? Colors.blue[800]:Colors.blue[500], | |
child: new Text(_categorys[index], | |
style: new TextStyle( | |
color: Colors.white), | |
), | |
), | |
), | |
), | |
), | |
); | |
} | |
onTabCategory(index){ | |
setState(() { | |
_category_selected = index; | |
}); | |
//Realiza chamada de serviço para atualizar as noticias de acordo com a categoria selecionada | |
} | |
} |
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