我從 API 獲取資料并將其存盤在串列視圖中。我在應用程式欄中設定標題以首先獲取 srAttributes.length （所有資料），然后在過濾器之后得到 SrForDisplay （過濾后的資料串列）。正常情況下，有144條資料，但每次出去回來，它就一直在增加。所以，首先是 144，然后是 288，然后是 483。過濾后的資料串列也不斷加倍，并且顯示正確的數字，所以我顯示了 2，但我在應用欄中得到了 4。我該如何解決？
import 'dart:convert';
import 'dart:io';
import 'package:az/Actifs.dart';
import 'package:az/SR_Details.dart';
import 'package:az/main.dart';
import 'package:badges/badges.dart';
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:http/http.dart' as http;
import 'package:intl/intl.dart';
import 'class/sr.dart';
class DataFromAPI extends StatefulWidget {
@override
_DataFromAPIState createState() => _DataFromAPIState();
}
List<Sr> _MyAllData=[];
List<Sr> _SrForDsiplay=[];
Map<String, Color> map={
"QUEUED":Color.fromARGB(255, 255, 136, 0),
"CLOSED":Colors.grey,
"Rejeced":Colors.red,
"INPROG":Colors.green,
"PENDING":Colors.blue,
"RESOLVED":Colors.green,
"NEW":Colors.blue,
};
Map<String, String> map1={
"1":"Urgent",
"2":"High",
"3":"Medium",
"4":"Low",
};
/*Map<String, Color> map3={
"Urgent":Colors.red,
"High":Color.fromARGB(255, 255, 139, 131),
"Medium":Colors.blue,
"Low":Colors.green,
"null":Colors.grey,
};*/
class _DataFromAPIState extends State<DataFromAPI> {
String title_string = "Liste des SR :";
@override
void initState() {
loadData().then((value) {
setState(() {
_MyAllData.addAll(value);
_SrForDsiplay=_MyAllData;
});
});
super.initState();
}
Future<List<Sr>> loadData() async {
try {
var response = await http.get(Uri.parse(
'http://192.168.1.59:9080/maxrest/rest/mbo/sr/?_lid=maxadmin&_lpwd=maxadmin&_format=json'));
if (response.statusCode == 200) {
final jsonBody = json.decode(response.body);
Demandes data = Demandes.fromJson(jsonBody);
final srAttributes = data.srMboSet.sr;
title_string='Liste des SR : ${srAttributes.length.toString()}';
return srAttributes;
}
} catch (e) {
throw Exception(e.toString());
}
throw Exception("");
}
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner:false,
home: new Scaffold(resizeToAvoidBottomInset: false ,
appBar: AppBar(
title: Text(title_string),
leading: IconButton(
icon: Icon(Icons.arrow_back), onPressed: () { Navigator.push(
context, MaterialPageRoute(builder: (context) => Home())); },
),
flexibleSpace: InkWell(onTap: () {
},),
),
body: FutureBuilder<List<Sr>?>(
future: loadData(),
builder: (context, snapshot) {
if (_MyAllData.isEmpty) {
return SizedBox(
height: MediaQuery.of(context).size.height / 1.3,
child: Center(
child: CircularProgressIndicator(),
),
);
} else { return
ListView(
children: <Widget>[Padding(
padding: const EdgeInsets.all(8.0),
child: TextField(
decoration:
InputDecoration(icon: Icon(Icons.search), hintText: "Enter id or description"),
onChanged: (text) {
text=text.toLowerCase();
setState(() {
_SrForDsiplay =_MyAllData.where((srAttributes) {
var srDescription = srAttributes.attributes.description!.content.toString().toLowerCase();
var srID= srAttributes.attributes.ticketid.content.toString();
return srDescription.contains(text) || srID.contains(text);
}).toList();
title_string='Liste des SR : ${_SrForDsiplay.length.toString()}';
print(title_string);
}
);
},
),
),
new ListView.builder(scrollDirection: Axis.vertical,
shrinkWrap: true,
itemCount: _SrForDsiplay.length,
itemBuilder: ((_, index) {
return
new ListTile(
title: new Card(
margin: new EdgeInsets.symmetric(
vertical: 2.0, horizontal: 8.0),
elevation: 10,
child: new ListTile(
title: new Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(padding: new EdgeInsets.all(2.0)),
Row(children :[
Container(
decoration: BoxDecoration(
border: Border.all(
color: Color.fromARGB(255, 255, 255, 255),
),
color: map['${_SrForDsiplay[index].attributes.status.content}'],
borderRadius: BorderRadius.all(Radius.circular(20)),
),
child:Text(' ${_SrForDsiplay[index].attributes.status.content} '),
),
Container(child: Text(' '),),
Container(
decoration: BoxDecoration(
border: Border.all(
color: Color.fromARGB(255, 255, 255, 255),
),
color:Colors.grey,
borderRadius: BorderRadius.all(Radius.circular(20)),
),
child:Text( map1['${_SrForDsiplay[index].attributes.reportedpriority?.content}'] ?? " null "),
),
],
),
SizedBox(
height: 8,
),
Row(children: <Widget>[
Expanded( child: Container(child: Text('${_SrForDsiplay[index].attributes.description?.content}',style: GoogleFonts.openSans(
textStyle: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w600)),),),),
Expanded(child: Container(child:Text( ' ${_SrForDsiplay[index].attributes.ticketid.content}',style: GoogleFonts.openSans(
textStyle: TextStyle(
fontSize: 14,
fontWeight: FontWeight.w400)),)))
],),
new Divider(
color: Color.fromARGB(255, 110, 109, 109),
),
Text(
'Reported : ${DateFormat.yMMMMEEEEd().format(DateTime.parse('${_SrForDsiplay[index].attributes.statusdate.content}' ))}' ,
style: GoogleFonts.openSans(
textStyle: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w400)),
),
new Text(
'Reported by : ${_SrForDsiplay[index].attributes.reportedby?.content}',style: GoogleFonts.openSans(
textStyle: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w400)),
),
Row(children: [new Image(image: AssetImage('assets/courroi.png'), width: 20),
Text(
'${_SrForDsiplay[index].attributes.assetnum?.content}'),], ),
Row(children: [new Image(image: AssetImage('assets/emp.png'), width: 20),
Text(
'${_SrForDsiplay[index].attributes.assetsiteid?.content}'),], ) ,
Divider(
color: Color.fromARGB(255, 110, 109, 109),
),
Row(children:[
Expanded(child: Badge(
position: BadgePosition.topEnd(top: -8, end: 20),
badgeColor: Colors.grey,
badgeContent: Text('1'),
child :IconButton(icon :Icon(Icons.file_present_rounded), padding: const EdgeInsets.all(0),
onPressed: () {
},
),
)
),
Expanded(child: IconButton (
icon: Icon(Icons.file_copy),
onPressed: () { },
),),
Expanded(child: IconButton(onPressed:() {
}, icon: Icon(Icons.delete)) )
],)
],
),
trailing: Icon(Icons.arrow_forward_ios_rounded),
),
),
onTap: () {
Navigator.push(
context,MaterialPageRoute(builder: (context) =>SrDetailsScreen(sr: _SrForDsiplay[index])),
);
}
);
}
),
)
]);
}
},
),
),
);
}
}
uj5u.com熱心網友回復：
在您的 initState 方法中再次加載它之前，您需要清除該串列。清除方法
@override
void initState() {
loadData().then((value) {
_MyAllData.clear();
setState(() {
_MyAllData.addAll(value);
_SrForDsiplay=_MyAllData;
});
});
super.initState();
}
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/520886.html
標籤：扑api镖
上一篇：如何在1個代碼塊中使用具有不同名稱的偵聽器創建多個相同的后期變數
下一篇：如何制作可移動的疊加層？