Arrays 需要将JSON数据获取字段配置为flatter中的小部件元素
我对JSON数据进行了以下建模,其中每个订单中都有订单和项目 数据模型Arrays 需要将JSON数据获取字段配置为flatter中的小部件元素,arrays,json,flutter,flutter-listview,flutter-pageview,Arrays,Json,Flutter,Flutter Listview,Flutter Pageview,我对JSON数据进行了以下建模,其中每个订单中都有订单和项目 数据模型 class NewOrder { String _error; List<Content> _content; NewOrder({String error, List<Content> content}) { this._error = error; this._content = content; }
class NewOrder {
String _error;
List<Content> _content;
NewOrder({String error, List<Content> content}) {
this._error = error;
this._content = content;
}
String get error => _error;
set error(String error) => _error = error;
List<Content> get content => _content;
set content(List<Content> content) => _content = content;
NewOrder.fromJson(Map<String, dynamic> json) {
_error = json['error'];
if (json['content'] != null) {
_content = new List<Content>();
json['content'].forEach((v) {
_content.add(new Content.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['error'] = this._error;
if (this._content != null) {
data['content'] = this._content.map((v) => v.toJson()).toList();
}
return data;
}
}
class Content {
String _orderNo;
List<OrderItems> _orderItems;
Content(
{
String orderNo,
List<OrderItems> orderItems}) {
this._orderNo = orderNo;
this._orderItems = orderItems;
}
set orderNo(String orderNo) => _orderNo = orderNo;
List<OrderItems> get orderItems => _orderItems;
set orderItems(List<OrderItems> orderItems) => _orderItems = orderItems;
Content.fromJson(Map<String, dynamic> json) {
_orderNo = json['order_no'];
if (json['order_items'] != null) {
_orderItems = new List<OrderItems>();
json['order_items'].forEach((v) {
_orderItems.add(new OrderItems.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['order_no'] = this._orderNo;
if (this._orderItems != null) {
data['order_items'] = this._orderItems.map((v) => v.toJson()).toList();
}
return data;
}
}
class OrderItems {
String _compCode;
OrderItems({String compCode, String compName, String orderNo}) {
this._compCode = compCode;
}
String get compCode => _compCode;
set compCode(String compCode) => _compCode = compCode;
OrderItems.fromJson(Map<String, dynamic> json) {
_compCode = json['comp_code'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['comp_code'] = this._compCode;
return data;
}
}
我需要在PageView.builder(水平滚动)和嵌套的ListView.builder(垂直滚动)中显示数据,我已经创建了这个模型
我使用下面的代码将JSON日期与上述配置的模型关联起来,该函数正在成功运行
Future<NewOrder> getdetailsoforders(String userid, String companycode) async {
SharedPreferences sharedPreferences = await SharedPreferences.getInstance();
Map data = {
'user_id': userid,
'company_code':companycode
};
var response = await http.post(newapi, body: data);
if(response.statusCode == 200) {
jsonResponse = json.decode(response.body);
return NewOrder.fromJson(jsonResponse);
}
Future getdetailsoforders(字符串用户ID、字符串公司代码)异步{
SharedReferences SharedReferences=等待SharedReferences.getInstance();
地图数据={
“用户id”:用户id,
“公司代码”:公司代码
};
var response=wait http.post(newapi,body:data);
如果(response.statusCode==200){
jsonResponse=json.decode(response.body);
返回NewOrder.fromJson(jsonResponse);
}
}
现在,我需要将JSON数据字段与我正在使用以下小部件的小部件模型相关联
FutureBuilder(
future: _future,
builder: (context, AsyncSnapshot<Payload> snapshot) {
switch (snapshot.connectionState) {
case ConnectionState.none:
return Text('none');
case ConnectionState.waiting:
return Center(child: CircularProgressIndicator());
case ConnectionState.active:
return Text('');
case ConnectionState.done:
if (snapshot.hasError) {
return Text(
'${snapshot.error}',
style: TextStyle(color: Colors.red),
);
} else {
return PageView.builder(
scrollDirection: Axis.horizontal,
itemCount: snapshot.data.content.length,// length of total orders
itemBuilder: (context, index) {
return Column(
children:<Widget>[
Text('Order Number to be Displayed here'),
ListView.builder(
shrinkWrap: true,
itemCount: //lenght of the items in the order to be determined,
itemBuilder: (context, index) {
return Column(
children: [
Text('Item Name'),
Text('Item description here')
],
);
},
),
])
});
}
}
})
FutureBuilder(
未来:未来,
生成器:(上下文,异步快照){
交换机(快照.连接状态){
案例连接状态。无:
返回文本(“无”);
案例连接状态。正在等待:
返回中心(子项:CircularProgressIndicator());
案例连接状态.active:
返回文本(“”);
案例连接状态。完成:
if(snapshot.hasError){
返回文本(
“${snapshot.error}”,
样式:TextStyle(颜色:Colors.red),
);
}否则{
返回PageView.builder(
滚动方向:轴水平,
itemCount:snapshot.data.content.length,//订单总数的长度
itemBuilder:(上下文,索引){
返回列(
儿童:[
文本(“此处显示的订单号”),
ListView.builder(
收缩膜:对,
itemCount://待确定顺序中项目的长度,
itemBuilder:(上下文,索引){
返回列(
儿童:[
文本(“项目名称”),
文本('此处为项目说明')
],
);
},
),
])
});
}
}
})
对于订单及其相应项目的最终列表,我需要从模型中获取字段,但我无法这样做,请指导我如何获取这些详细信息。
我需要内容模型中的订单号
,然后在同一模型中,我需要获得订单项目的长度
,然后是这些订单项目的字段值
我对JSON颤振的学习还不熟悉,这就是我面临这个问题的原因,请指导我解决方案
我知道我已经写了很多代码,但这是为了提供一个清晰的画面,具体需要做什么。
builder:(上下文,异步快照)
与
访问数据,如:
Text(snapshot.data.content[index].orderNo)
编辑答案,为其他人找到类似的方法
builder: (context, snapshot)
Text(snapshot.data.content[index].orderNo)