目前我的应用程序正在向一个 API 发出一个 http 请求,该请求为我提供了 json 并列出了一些项目,这个 json 被分配给一个 List 变量。我已经将这些数据拉入我的应用程序,但需要在 DropDownButton 上显示它。要在下拉按钮中显示此数据,我应该使用 FutureBuilder 还是有类似的最佳实践?
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1 回答
0
你可以尝试这样的事情,
WalletRepo.getRestaurantBalance()
用他们当前的余额获取一堆餐厅
FutureBuilder(
future: WalletRepo.getRestaurantBalance(),
builder: (_, AsyncSnapshot<GetRestaurantBalance> snapshot){
if(snapshot.hasData && snapshot.data != null){
return StatefulBuilder(builder: (BuildContext context, void Function(void Function()) nSetState) {
return Column(
children: [
Container(
decoration: BoxDecoration(
border: Border.all(color: Colors.grey),
borderRadius: BorderRadius.circular(5)
),
padding: EdgeInsets.symmetric(horizontal: 10,vertical: 5),
child: DropdownButtonHideUnderline(
child: DropdownButton(
onChanged: (RestaurantBalanceModel restaurant) {
if(restaurant.balance > 0.0){
print(chosenRestaurant);
nSetState(() => chosenRestaurant = restaurant);
}else{
Snack.bottom('Error', 'Restaurant has no balance to withdraw');
}
},
value: chosenRestaurant,
isExpanded: true,
hint: Text(
'Choose a restaurant'
),
items: snapshot.data.getAllRestaurantsByOwner.data.map((restaurant) => DropdownMenuItem(
value: restaurant,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
restaurant.name
),
Text(
'৳ ${restaurant.balance.toStringAsFixed(1)}'
)
],
),
)).toList(),
),
),
)
于 2021-02-16T04:38:34.867 回答