notice_list_complet_nav.dart

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 _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: _getListViewWidget(),
      ),
      bottomNavigationBar: _getBottomNavigationBa()
    );

  }

  @override
  void initState() {

    loadNotices();

  }
  
  Widget _getBottomNavigationBa() {
  
    return new BottomNavigationBar(
         onTap: onTabTapped, // new
         currentIndex: _currentIndex, // new
         items: [
           new BottomNavigationBarItem(
             icon: const Icon(Icons.home),
             title: Text('Recentes'),
             backgroundColor: Colors.blue
           ),
           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.blue
           )
         ],
       );
  }
  
  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);

      });

    });

  }

}