Lista de Contatos

list.dart

import 'package:bytebank/database/dao/contact_dao.dart';
import 'package:bytebank/models/contact.dart';
import 'package:bytebank/screens/contact/form.dart';
import 'package:flutter/material.dart';

class ContactsList extends StatefulWidget {
  @override
  _ContactsListState createState() => _ContactsListState();
}

class _ContactsListState extends State<ContactsList> {

  final ContactDao _dao = ContactDao();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Contacts'),
      ),
      body: FutureBuilder<List<Contact>>(
          future:
              Future.delayed(Duration(seconds: 1)).then((value) => _dao.findAll()),
          builder: (context, snapshot) {
            debugPrint('snapshot.connectionState: ${snapshot.connectionState}');
            switch (snapshot.connectionState) {
              case ConnectionState.none:
                break;
              case ConnectionState.waiting:
                return Center(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      CircularProgressIndicator(),
                      Text('Loading'),
                    ],
                  ),
                );
                break;
              case ConnectionState.active:
                break;
              case ConnectionState.done:
                return ListView.builder(
                  itemCount: snapshot.data.length,
                  itemBuilder: (context, indice) {
                    return _ContactItem(snapshot.data[indice]);
                  },
                );
                break;
            }
            return Text('Unkown error');
          }),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          Navigator.of(context)
              .push(MaterialPageRoute(builder: (context) => ConctactForm()))
              .then((newContact) {
            setState(() {});
          });
        },
        child: Icon(Icons.add),
      ),
    );
  }
}

class _ContactItem extends StatelessWidget {
  final Contact contact;

  const _ContactItem(this.contact);

  @override
  Widget build(BuildContext context) {
    return Card(
      child: ListTile(
        title: Text(
          this.contact.name,
          style: TextStyle(fontSize: 24),
        ),
        subtitle: Text(
          this.contact.accountNumber.toString(),
          style: TextStyle(fontSize: 16),
        ),
      ),
    );
  }
}