FutureBuilder: future function calling even after push navigator
I have a listview that returns a list of orders from my local database(sqflite) and it's working very well.
After a tile of the list is tapped I push the navigation to another page, when my second page is loaded I notice that future function is called again, my second page loads and works normally but to me it seems unnecessary to call the future function again.
Can I control this behavior?
Here is my code for the first page:
import 'package:flutter/material.dart';
import '../model/coleta.dart';
import 'coletarPedido.dart';
void selectedOrderTile(PedidoColeta pedidoColeta, BuildContext context) {
Navigator.push(context, new MaterialPageRoute(builder: (context) => new ColetaPage(pedidoColeta: pedidoColeta)));
}
Future<List<PedidoColeta>> listaPedidosAguardandoColeta() async {
return await PedidoColeta.retornaListaPedidosColeta(1);
}
Widget pedidosAguardandoColeta(context) {
return new FutureBuilder<List<PedidoColeta>> (
future: listaPedidosAguardandoColeta(),
builder: (BuildContext context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
if (snapshot.data == null || snapshot.data.length == 0) {
return new Text("Nenhum pedido por aqui!");
} else {
return new ListView.separated(
padding: const EdgeInsets.all(8.0),
itemCount: snapshot.data.length,
itemBuilder: (context, i) {
return tilePedido(snapshot.data[i], context);
},
separatorBuilder: (context, i) {
return Divider();
},
);
}
}
return new Container(
alignment: AlignmentDirectional.center,
child: new CircularProgressIndicator()
);
},
);
}
Widget tilePedido(PedidoColeta pedidoColeta, context) {
return ListTile(
leading: new Container(
width: 50.0,
height: 50.0,
decoration: new BoxDecoration(
shape: BoxShape.circle,
color: Colors.grey[300],
image: new DecorationImage(
fit: BoxFit.fill,
image: AssetImage(pedidoColeta.logoCliente)
)
)
),
title: Text('Pedido: ' + pedidoColeta.idPedido.toString() + ' Ocam: ' + pedidoColeta.idOcam.toString(), style: Theme.of(context).textTheme.button),
subtitle: Text('Total de Itens: ' + pedidoColeta.qtdItem.toString() + 'nData de Saída: ' + pedidoColeta.dataSaida.toString()),
dense: true,
onTap: () => selectedOrderTile(pedidoColeta, context),
);
}
flutter
add a comment |
I have a listview that returns a list of orders from my local database(sqflite) and it's working very well.
After a tile of the list is tapped I push the navigation to another page, when my second page is loaded I notice that future function is called again, my second page loads and works normally but to me it seems unnecessary to call the future function again.
Can I control this behavior?
Here is my code for the first page:
import 'package:flutter/material.dart';
import '../model/coleta.dart';
import 'coletarPedido.dart';
void selectedOrderTile(PedidoColeta pedidoColeta, BuildContext context) {
Navigator.push(context, new MaterialPageRoute(builder: (context) => new ColetaPage(pedidoColeta: pedidoColeta)));
}
Future<List<PedidoColeta>> listaPedidosAguardandoColeta() async {
return await PedidoColeta.retornaListaPedidosColeta(1);
}
Widget pedidosAguardandoColeta(context) {
return new FutureBuilder<List<PedidoColeta>> (
future: listaPedidosAguardandoColeta(),
builder: (BuildContext context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
if (snapshot.data == null || snapshot.data.length == 0) {
return new Text("Nenhum pedido por aqui!");
} else {
return new ListView.separated(
padding: const EdgeInsets.all(8.0),
itemCount: snapshot.data.length,
itemBuilder: (context, i) {
return tilePedido(snapshot.data[i], context);
},
separatorBuilder: (context, i) {
return Divider();
},
);
}
}
return new Container(
alignment: AlignmentDirectional.center,
child: new CircularProgressIndicator()
);
},
);
}
Widget tilePedido(PedidoColeta pedidoColeta, context) {
return ListTile(
leading: new Container(
width: 50.0,
height: 50.0,
decoration: new BoxDecoration(
shape: BoxShape.circle,
color: Colors.grey[300],
image: new DecorationImage(
fit: BoxFit.fill,
image: AssetImage(pedidoColeta.logoCliente)
)
)
),
title: Text('Pedido: ' + pedidoColeta.idPedido.toString() + ' Ocam: ' + pedidoColeta.idOcam.toString(), style: Theme.of(context).textTheme.button),
subtitle: Text('Total de Itens: ' + pedidoColeta.qtdItem.toString() + 'nData de Saída: ' + pedidoColeta.dataSaida.toString()),
dense: true,
onTap: () => selectedOrderTile(pedidoColeta, context),
);
}
flutter
add a comment |
I have a listview that returns a list of orders from my local database(sqflite) and it's working very well.
After a tile of the list is tapped I push the navigation to another page, when my second page is loaded I notice that future function is called again, my second page loads and works normally but to me it seems unnecessary to call the future function again.
Can I control this behavior?
Here is my code for the first page:
import 'package:flutter/material.dart';
import '../model/coleta.dart';
import 'coletarPedido.dart';
void selectedOrderTile(PedidoColeta pedidoColeta, BuildContext context) {
Navigator.push(context, new MaterialPageRoute(builder: (context) => new ColetaPage(pedidoColeta: pedidoColeta)));
}
Future<List<PedidoColeta>> listaPedidosAguardandoColeta() async {
return await PedidoColeta.retornaListaPedidosColeta(1);
}
Widget pedidosAguardandoColeta(context) {
return new FutureBuilder<List<PedidoColeta>> (
future: listaPedidosAguardandoColeta(),
builder: (BuildContext context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
if (snapshot.data == null || snapshot.data.length == 0) {
return new Text("Nenhum pedido por aqui!");
} else {
return new ListView.separated(
padding: const EdgeInsets.all(8.0),
itemCount: snapshot.data.length,
itemBuilder: (context, i) {
return tilePedido(snapshot.data[i], context);
},
separatorBuilder: (context, i) {
return Divider();
},
);
}
}
return new Container(
alignment: AlignmentDirectional.center,
child: new CircularProgressIndicator()
);
},
);
}
Widget tilePedido(PedidoColeta pedidoColeta, context) {
return ListTile(
leading: new Container(
width: 50.0,
height: 50.0,
decoration: new BoxDecoration(
shape: BoxShape.circle,
color: Colors.grey[300],
image: new DecorationImage(
fit: BoxFit.fill,
image: AssetImage(pedidoColeta.logoCliente)
)
)
),
title: Text('Pedido: ' + pedidoColeta.idPedido.toString() + ' Ocam: ' + pedidoColeta.idOcam.toString(), style: Theme.of(context).textTheme.button),
subtitle: Text('Total de Itens: ' + pedidoColeta.qtdItem.toString() + 'nData de Saída: ' + pedidoColeta.dataSaida.toString()),
dense: true,
onTap: () => selectedOrderTile(pedidoColeta, context),
);
}
flutter
I have a listview that returns a list of orders from my local database(sqflite) and it's working very well.
After a tile of the list is tapped I push the navigation to another page, when my second page is loaded I notice that future function is called again, my second page loads and works normally but to me it seems unnecessary to call the future function again.
Can I control this behavior?
Here is my code for the first page:
import 'package:flutter/material.dart';
import '../model/coleta.dart';
import 'coletarPedido.dart';
void selectedOrderTile(PedidoColeta pedidoColeta, BuildContext context) {
Navigator.push(context, new MaterialPageRoute(builder: (context) => new ColetaPage(pedidoColeta: pedidoColeta)));
}
Future<List<PedidoColeta>> listaPedidosAguardandoColeta() async {
return await PedidoColeta.retornaListaPedidosColeta(1);
}
Widget pedidosAguardandoColeta(context) {
return new FutureBuilder<List<PedidoColeta>> (
future: listaPedidosAguardandoColeta(),
builder: (BuildContext context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
if (snapshot.data == null || snapshot.data.length == 0) {
return new Text("Nenhum pedido por aqui!");
} else {
return new ListView.separated(
padding: const EdgeInsets.all(8.0),
itemCount: snapshot.data.length,
itemBuilder: (context, i) {
return tilePedido(snapshot.data[i], context);
},
separatorBuilder: (context, i) {
return Divider();
},
);
}
}
return new Container(
alignment: AlignmentDirectional.center,
child: new CircularProgressIndicator()
);
},
);
}
Widget tilePedido(PedidoColeta pedidoColeta, context) {
return ListTile(
leading: new Container(
width: 50.0,
height: 50.0,
decoration: new BoxDecoration(
shape: BoxShape.circle,
color: Colors.grey[300],
image: new DecorationImage(
fit: BoxFit.fill,
image: AssetImage(pedidoColeta.logoCliente)
)
)
),
title: Text('Pedido: ' + pedidoColeta.idPedido.toString() + ' Ocam: ' + pedidoColeta.idOcam.toString(), style: Theme.of(context).textTheme.button),
subtitle: Text('Total de Itens: ' + pedidoColeta.qtdItem.toString() + 'nData de Saída: ' + pedidoColeta.dataSaida.toString()),
dense: true,
onTap: () => selectedOrderTile(pedidoColeta, context),
);
}
flutter
flutter
edited Nov 22 '18 at 16:02
MTCoster
3,13621940
3,13621940
asked Nov 22 '18 at 15:44
limarslimars
212
212
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