为了隔离问题，我创建了一个新代码、一个新程序和一台新机器。 相同的结果，它只是不想打印“quotes”之后且具有“anythingPrice”的任何值
我再次可以给您一个临时密钥，您可以完全运行代码。在你身边。
请告诉我。
import 'dart:async';
import 'dart:convert';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
//import 'package:flutter_web/material.dart';
//import 'package:flutter/main.dart' as app;
//import 'package:flutter_web_ui/ui.dart' as ui;
Future<List<Photo>> fetchPhotos(http.Client client) async {
final response =
// await client.get('https://cloud.iexapis.com/stable/stock/market/batch?symbols=CNPF,ICOL,PGX,MORL,EMLC,GYLD,IPFF,SMB,YDIV,YYY,PEY,IEI,TLH,DIA,BSJF,MONY&types=quote,stats&token=');
await client.get('https://cloud.iexapis.com/stable/stock/market/batch?symbols=PGX,MORL,EMLC,GYLD,IPFF,SMB,YDIV,YYY,PEY,PGF,SNLN,DVHL,AUNZ,MDIV,PHB,PFXF,FPE,TIPX,MLN,SDIV,SIPE,SEMF,EMAG,IEMF,EU,BSCM,LEMF,BSCL,BSCK,BSCJ,BSCI,DSUM,BSCF,KBWD,PCEF,BSCG,BSCH,HYEM,ITM,BKLN,PGHY,IBCE,PZT,IJNK,XMPT,THHY,QYLD,IHY,IYLD,SHYD,PRB,DVHI,GOVT,BSJJ,BSJK,RIGS,INY,IBCD,PZA,PFIG,IBCC,BSCE,PVI,MBG,CXA,FWDB,DIV,CHLC,BSJI,FLTR,PWZ,MUAH,IBDD,PICB,IBDB,BSJH,RVNU,BSJG,IBDC,XOVR,BSJE,EBND,PCY,BWX,SJNK,DES,ANGL,BAB,SST,EMCD,CBND,HYD,PLW,SCPB,FLRN,BWZ,KBWY,ELD,IBND,AOK,RWXL,ITR,DON,DGRS,JNK,TZD,EPU,PFF,HYLD,GGOV,ULST,SPHD,HFIN,DGRW,LWC,ALD,LEMB,AGND,ITIP,EMHY,QLTC,TFI,SRLN,HYLS,SHM,GNMA,CEMB,IGOV,MINC,AGZD,FTSL,SPLV,GHYG,ISTB,ENGN,CMBS,GTIP,SCHO,SMMU,QLTA,SCHZ,HSPX,TUZ,GIY,GSY,TFLO,VMBS,CWB,FLOT,STPZ,MUAC,SCHR,BABZ,HYXU,GMTB,MUNI,WIP,MUAD,QLTB,SCHP,GMMB,MUAE,IPE,NYF,BNDX,MUAF,HYMB,TIPZ,CMF,LAG,ILTB,ITE,CLY,VGSH,VGIT,LTPZ,BABS,HYHG,EMCB,DVYL,VGLT,DHS,TLO,VWOB,IGHG,GLCB,RAVI,VCSH,BSV,BND,BIV,ISHG,SDYL,VCIT,SHY,BLV,HYG,VCLT,TENZ,DTN,BIL,AUD,DLN,DTD,FTSD,CAD,STIP,CORP,HYS,HOLD,TRSY,IEF,IBDA,COBO,BOND,MINT,MBB,CSJ,AGG,SUB,EMB,CIU,GVI,MUB,GBF,TIP,AGZ,CFT,LQD,TLT,IEI,TLH,DIA,BSJF,MONY&types=stats,quote&token=');
//https://cloud.iexapis.com/v1/stock/market/batch?&types=price&symbols=aapl,fb,tsla&token=YOUR_TOKEN_HERE
//https://cloud.iexapis.com/v1/stock/market/batch?&types=quote&symbols=aapl,fb,tsla&token=
// Use the compute function to run parsePhotos in a separate isolate.
//https://cloud.iexapis.com/stable/stock/market/batch?symbols=CNPF,ICOL,PGX,MORL,EMLC,GYLD,IPFF,SMB,YDIV,YYY,PEY,PGF,SNLN,DVHL,AUNZ,MDIV,PHB,PFXF,FPE,TIPX,MLN,SDIV,SIPE,SEMF,EMAG,IEMF,EU,BSCM,LEMF,BSCL,BSCK,BSCJ,BSCI,DSUM,BSCF,KBWD,PCEF,BSCG,BSCH,HYEM,ITM,BKLN,PGHY,IBCE,PZT,IJNK,XMPT,THHY,QYLD,IHY,IYLD,SHYD,PRB,DVHI,GOVT,BSJJ,BSJK,RIGS,INY,IBCD,PZA,PFIG,IBCC,BSCE,PVI,MBG,CXA,FWDB,DIV,CHLC,BSJI,FLTR,PWZ,MUAH,IBDD,PICB,IBDB,BSJH,RVNU,BSJG,IBDC,XOVR,BSJE,EBND,PCY,BWX,SJNK,DES,ANGL,BAB,SST,EMCD,CBND,HYD,PLW,SCPB,FLRN,BWZ,KBWY,ELD,IBND,AOK,RWXL,ITR,DON,DGRS,JNK,TZD,EPU,PFF,HYLD,GGOV,ULST,SPHD,HFIN,DGRW,LWC,ALD,LEMB,AGND,ITIP,EMHY,QLTC,TFI,SRLN,HYLS,SHM,GNMA,CEMB,IGOV,MINC,AGZD,FTSL,SPLV,GHYG,ISTB,ENGN,CMBS,GTIP,SCHO,SMMU,QLTA,SCHZ,HSPX,TUZ,GIY,GSY,TFLO,VMBS,CWB,FLOT,STPZ,MUAC,SCHR,BABZ,HYXU,GMTB,MUNI,WIP,MUAD,QLTB,SCHP,GMMB,MUAE,IPE,NYF,BNDX,MUAF,HYMB,TIPZ,CMF,LAG,ILTB,ITE,CLY,VGSH,VGIT,LTPZ,BABS,HYHG,EMCB,DVYL,VGLT,DHS,TLO,VWOB,IGHG,GLCB,RAVI,VCSH,BSV,BND,BIV,ISHG,SDYL,VCIT,SHY,BLV,HYG,VCLT,TENZ,DTN,BIL,AUD,DLN,DTD,FTSD,CAD,STIP,CORP,HYS,HOLD,TRSY,IEF,IBDA,COBO,BOND,MINT,MBB,CSJ,AGG,SUB,EMB,CIU,GVI,MUB,GBF,TIP,AGZ,CFT,LQD,TLT,IEI,TLH,DIA,BSJF,MONY&types=quote,stats&token=
return compute(parsePhotos, response.body);
}
// A function that converts a response body into a List<Photo>.
List<Photo> parsePhotos(String responseBody) {
//final parsed = json.decode(responseBody).cast<Map<String,dynamic>>();
//return parsed.map<Photo>((json) => Photo.fromJson(json)).toList();
dynamic Obj = json.decode(responseBody);
debugPrint(responseBody, wrapWidth: 8192);
print(Obj.length);
List<Photo> photoList = [];
Obj.forEach((k, v) => photoList.add(Photo(k,v)));
return photoList;
}
class Photo {
String symbol;
//String companyName;
dynamic data;
// dynamic iexClose;
// dynamic quote;
Photo(this.symbol ,this.data);
}
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
final appTitle = 'Monthly Paying ETFs';
return MaterialApp(
title: appTitle,
home: MyHomePage(title: appTitle),
);
}
}
class MyHomePage extends StatelessWidget {
final String title;
MyHomePage({Key key, this.title}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
drawer: Drawer(
// Add a ListView to the drawer. This ensures the user can scroll
// through the options in the drawer if there isn't enough vertical
// space to fit everything.
child: ListView(
// Important: Remove any padding from the ListView.
padding: EdgeInsets.zero,
children: <Widget>[
DrawerHeader(
child: Text('About'),
decoration: BoxDecoration(
color: Colors.grey,
),
),
ListTile(
title: Text('This app is to provide the list of ETF s that pay monthly dividend'),
onTap: () {
// Update the state of the app
// ...
// Then close the drawer
Navigator.pop(context);
},
),
ListTile(
title: Text('for questions or feedback please contact me at '),
onTap: () {
// Update the state of the app
// ...
// Then close the drawer
Navigator.pop(context);
},
),
],
),
),
appBar: AppBar(
title: Text(title),
backgroundColor: Colors.greenAccent,
),
body: FutureBuilder<List<Photo>>(
future: fetchPhotos(http.Client()),
builder: (context, snapshot) {
if (snapshot.hasError) print(snapshot.error);
return snapshot.hasData
? PhotosList(photos: snapshot.data)
: Center(child: CircularProgressIndicator());
},
),
);
}
}
class PhotosList extends StatefulWidget {
final List photos;
PhotosList({Key key, this.photos})
: assert(photos != null),
super(key: key);
@override
_PhotosListState createState() => _PhotosListState();
}
class _PhotosListState extends State<PhotosList> {
@override
Widget build(BuildContext context) {
return bodyData();
}
SingleChildScrollView bodyData() =>
SingleChildScrollView(
scrollDirection: Axis.vertical,
// padding: EdgeInsets.all(0.0),
//padding: const EdgeInsets.symmetric(
// padding: new EdgeInsets.fromLTRB(0.001, .001, 1.0, 1.0),
padding: EdgeInsets.all(0.05),
// child: FittedBox(fit:BoxFit.contain,
child:SingleChildScrollView(
scrollDirection: Axis.horizontal,
child:
FittedBox(
fit: BoxFit.fitHeight,
child: DataTable(
// sortColumnIndex: 1,
// sortAscending: true,
columns: <DataColumn>[
DataColumn(
label: Text("Company"),
onSort: (_, __) {
setState(() {
widget.photos.sort((a, b) =>
a.data["quote"]["companyName"]
.compareTo(b.data["quote"]["companyName"]));
});
},
),
DataColumn(
label: Text("ttmDivRate"),
numeric: true,
onSort: (_,__) {
setState(() {
widget.photos.sort((a, b) =>
a.data["quote"]["ttmDividendRate"]
.compareTo(b.data["quote"]["ttmDividendRate"]));
});
},
),
DataColumn(
label: Text("Price"),
numeric: true,
onSort: (_, __) {
setState(() {
widget.photos.sort((a, b) => a.data ["quote"]["latestPrice"]
.compareTo(b.data["quote"]["latestPrice"]));
});
},
),
],
rows: widget.photos
.map(
(photo) =>
DataRow(
cells: [
DataCell(
Text('${photo.data["stats"]["companyName"] ?? ""}'),
),
DataCell(
Text('${photo.data["stats"]["ttmDividendRate"] ?? ""}'),
),
//["quote"]["stats"]
DataCell(
Text('${photo.data["quote"]["stats"]["latestPrice"] ?? ""}')
),
],
),
)
.toList())
),
),
);
}
问题是，当输出位于控制台时，值就在那里，而 Flutter 说为 null。
===================
Launching lib/main.dart on iPhone 11 Pro Max in debug mode...
Running Xcode build...
Xcode build done. 17.9s
Waiting for iPhone 11 Pro Max to report its views...
Debug service listening on ws://127.0.0.1:57768/yyPV-GQyldg=/ws
Syncing files to device iPhone 11 Pro Max...
flutter: {"PGX":{"stats":{"week52change":-0.025465,"week52high":15.28,"week52low":9.71,"marketcap":4595628000,"employees":null,"day200MovingAvg":14.55,"day50MovingAvg":13.39,"float":null,"avg10Volume":2336007.5,"avg30Volume":2648722.77,"ttmEPS":null,"ttmDividendRate":0.8361,"companyName":"Invesco Preferred ETF","sharesOutstanding":324550000,"maxChangePercent":-0.3042,"year5ChangePercent":-0.0367,"year2ChangePercent":-0.0167,"year1ChangePercent":-0.025465,"ytdChangePercent":-0.064111,"month6ChangePercent":-0.045822,"month3ChangePercent":-0.052209,"month1ChangePercent":0.019438,"day30ChangePercent":0.028322,"day5ChangePercent":0.015054,"nextDividendDate":"2020-05-18","dividendYield":0.059046610169491524,"nextEarningsDate":null,"exDividendDate":"2020-05-18","peRatio":null,"beta":0.5684535732534528},"quote":{"symbol":"PGX","companyName":"Invesco Preferred ETF","primaryExchange":"NYSE Arca","calculationPrice":"close","open":14.11,"openTime":1590154200191,"openSource":"official","close":14.16,"closeT<…>
flutter: 2020","latestUpdate":1590177600180,"latestVolume":4747,"iexRealtimePrice":null,"iexRealtimeSize":null,"iexLastUpdated":null,"delayedPrice":11.245,"delayedPriceTime":1590192000004,"oddLotDelayedPrice":11.193,"oddLotDelayedPriceTime":1590173727614,"extendedPrice":11.245,"extendedChange":0.005,"extendedChangePercent":0.00044,"extendedPriceTime":1590186600005,"previousClose":11.16,"previousVolume":8688,"change":0.08,"changePercent":0.00717,"volume":4747,"iexMarketPercent":null,"iexVolume":null,"avgTotalVolume":12262,"iexBidPrice":null,"iexBidSize":null,"iexAskPrice":null,"iexAskSize":null,"iexOpen":null,"iexOpenTime":null,"iexClose":11.04,"iexCloseTime":1589988569572,"marketCap":35406000,"peRatio":null,"week52High":16.6,"week52Low":8.47,"ytdChange":-0.300712,"lastTradeTime":1590177600181,"isUSMarketOpen":false}},"IPFF":{"stats":{"week52change":-0.23383400000000001,"week52high":15.71,"week52low":8.38,"marketcap":28738500,"employees":null,"day200MovingAvg":13.89,"day50MovingAvg":10.96,"float<…>
flutter: 95
flutter: {"PGX":{"stats":{"week52change":-0.025465,"week52high":15.28,"week52low":9.71,"marketcap":4595628000,"employees":null,"day200MovingAvg":14.55,"day50MovingAvg":13.39,"float":null,"avg10Volume":2336007.5,"avg30Volume":2648722.77,"ttmEPS":null,"ttmDividendRate":0.8361,"companyName":"Invesco Preferred ETF","sharesOutstanding":324550000,"maxChangePercent":-0.3042,"year5ChangePercent":-0.0367,"year2ChangePercent":-0.0167,"year1ChangePercent":-0.025465,"ytdChangePercent":-0.064111,"month6ChangePercent":-0.045822,"month3ChangePercent":-0.052209,"month1ChangePercent":0.019438,"day30ChangePercent":0.028322,"day5ChangePercent":0.015054,"nextDividendDate":"2020-05-18","dividendYield":0.059046610169491524,"nextEarningsDate":null,"exDividendDate":"2020-05-18","peRatio":null,"beta":0.5684535732534528},"**quote":{"symbol":"PGX","companyName":"Invesco Preferred ETF","primaryExchange":"NYSE Arca","calculationPrice":"close","open":14.11,"openTime":1590154200191,"openSource":"official","close":14.16,"closeT<…>
flutter: 2020","latestUpdate":1590177600180,"latestVolume":4747,"iexRealtimePrice":null,"iexRealtimeSize":null,"iexLastUpdated":null,"delayedPrice":11.245,"delayedPriceTime":1590192000004,"oddLotDelayedPrice":11.193,"oddLotDelayedPriceTime":1590173727614,"extendedPrice":11.245,"extendedChange":0.005,"extendedChangePercent":0.00044,"extendedPriceTime":1590186600005,"previousClose":11.16,"previousVolume":8688,"change":0.08,"changePercent":0.00717,"volume":4747,"iexMarketPercent":null,"iexVolume":null,"avgTotalVolume":12262,"iexBidPrice":null,"iexBidSize":null,"iexAskPrice":null,"iexAskSize":null,"iexOpen":null,"iexOpenTime":null,"iexClose":11.04,"iexCloseTime":1589988569572,"marketCap":35406000,"peRatio":null,"week52High":16.6,"week52Low":8.47,"ytdChange":-0.300712,"lastTradeTime":1590177600181,"isUSMarketOpen":false}},"IPFF":{"stats":{"week52change":-0.23383400000000001,"week52high":15.71,"week52low":8.38,"marketcap":28738500,"employees":null,"day200MovingAvg":13.89,"day50MovingAvg":10.96,"float<…>
flutter: 95**
════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
The following NoSuchMethodError was thrown building photorealist(dirty, state: _PhotosListState#8eef8):
The method '[]' was called on null.
Receiver: null
Tried calling: []("iexClose")
=============
Column Price is empty.
If I try to call "delayedPrice":11.552," or "iexClose":11.04. it does not print in the app.
我已经检查了您共享的令牌并测试了您共享的代码。
您从引发错误的地方以错误的方式调用数组。
我尝试了一下，输出显示没有任何错误
DataCell(
Text('${photo.data["quote"]["stats"]["latestPrice"] ?? ""}') //❌
//REPLACE ["quote"]["stats"] with ["stats"]
Text('${photo.data["stats"]["latestPrice"] ?? ""}') //✔️
),
OUTPUT:
工作代码
import 'dart:async';
import 'dart:convert';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
//import 'package:flutter_web/material.dart';
//import 'package:flutter/main.dart' as app;
//import 'package:flutter_web_ui/ui.dart' as ui;
Future<List<Photo>> fetchPhotos(http.Client client) async {
final response =
// await client.get('https://cloud.iexapis.com/stable/stock/market/batch?symbols=CNPF,ICOL,PGX,MORL,EMLC,GYLD,IPFF,SMB,YDIV,YYY,PEY,IEI,TLH,DIA,BSJF,MONY&types=quote,stats&token=');
await client.get(
'https://cloud.iexapis.com/stable/stock/market/batch?symbols=PGX,MORL,EMLC,GYLD,IPFF,SMB,YDIV,YYY,PEY,PGF,SNLN,DVHL,AUNZ,MDIV,PHB,PFXF,FPE,TIPX,MLN,SDIV,SIPE,SEMF,EMAG,IEMF,EU,BSCM,LEMF,BSCL,BSCK,BSCJ,BSCI,DSUM,BSCF,KBWD,PCEF,BSCG,BSCH,HYEM,ITM,BKLN,PGHY,IBCE,PZT,IJNK,XMPT,THHY,QYLD,IHY,IYLD,SHYD,PRB,DVHI,GOVT,BSJJ,BSJK,RIGS,INY,IBCD,PZA,PFIG,IBCC,BSCE,PVI,MBG,CXA,FWDB,DIV,CHLC,BSJI,FLTR,PWZ,MUAH,IBDD,PICB,IBDB,BSJH,RVNU,BSJG,IBDC,XOVR,BSJE,EBND,PCY,BWX,SJNK,DES,ANGL,BAB,SST,EMCD,CBND,HYD,PLW,SCPB,FLRN,BWZ,KBWY,ELD,IBND,AOK,RWXL,ITR,DON,DGRS,JNK,TZD,EPU,PFF,HYLD,GGOV,ULST,SPHD,HFIN,DGRW,LWC,ALD,LEMB,AGND,ITIP,EMHY,QLTC,TFI,SRLN,HYLS,SHM,GNMA,CEMB,IGOV,MINC,AGZD,FTSL,SPLV,GHYG,ISTB,ENGN,CMBS,GTIP,SCHO,SMMU,QLTA,SCHZ,HSPX,TUZ,GIY,GSY,TFLO,VMBS,CWB,FLOT,STPZ,MUAC,SCHR,BABZ,HYXU,GMTB,MUNI,WIP,MUAD,QLTB,SCHP,GMMB,MUAE,IPE,NYF,BNDX,MUAF,HYMB,TIPZ,CMF,LAG,ILTB,ITE,CLY,VGSH,VGIT,LTPZ,BABS,HYHG,EMCB,DVYL,VGLT,DHS,TLO,VWOB,IGHG,GLCB,RAVI,VCSH,BSV,BND,BIV,ISHG,SDYL,VCIT,SHY,BLV,HYG,VCLT,TENZ,DTN,BIL,AUD,DLN,DTD,FTSD,CAD,STIP,CORP,HYS,HOLD,TRSY,IEF,IBDA,COBO,BOND,MINT,MBB,CSJ,AGG,SUB,EMB,CIU,GVI,MUB,GBF,TIP,AGZ,CFT,LQD,TLT,IEI,TLH,DIA,BSJF,MONY&types=stats,quote&token=token_was_added_here');
//https://cloud.iexapis.com/v1/stock/market/batch?&types=price&symbols=aapl,fb,tsla&token=YOUR_TOKEN_HERE
//https://cloud.iexapis.com/v1/stock/market/batch?&types=quote&symbols=aapl,fb,tsla&token=
// Use the compute function to run parsePhotos in a separate isolate.
//https://cloud.iexapis.com/stable/stock/market/batch?symbols=CNPF,ICOL,PGX,MORL,EMLC,GYLD,IPFF,SMB,YDIV,YYY,PEY,PGF,SNLN,DVHL,AUNZ,MDIV,PHB,PFXF,FPE,TIPX,MLN,SDIV,SIPE,SEMF,EMAG,IEMF,EU,BSCM,LEMF,BSCL,BSCK,BSCJ,BSCI,DSUM,BSCF,KBWD,PCEF,BSCG,BSCH,HYEM,ITM,BKLN,PGHY,IBCE,PZT,IJNK,XMPT,THHY,QYLD,IHY,IYLD,SHYD,PRB,DVHI,GOVT,BSJJ,BSJK,RIGS,INY,IBCD,PZA,PFIG,IBCC,BSCE,PVI,MBG,CXA,FWDB,DIV,CHLC,BSJI,FLTR,PWZ,MUAH,IBDD,PICB,IBDB,BSJH,RVNU,BSJG,IBDC,XOVR,BSJE,EBND,PCY,BWX,SJNK,DES,ANGL,BAB,SST,EMCD,CBND,HYD,PLW,SCPB,FLRN,BWZ,KBWY,ELD,IBND,AOK,RWXL,ITR,DON,DGRS,JNK,TZD,EPU,PFF,HYLD,GGOV,ULST,SPHD,HFIN,DGRW,LWC,ALD,LEMB,AGND,ITIP,EMHY,QLTC,TFI,SRLN,HYLS,SHM,GNMA,CEMB,IGOV,MINC,AGZD,FTSL,SPLV,GHYG,ISTB,ENGN,CMBS,GTIP,SCHO,SMMU,QLTA,SCHZ,HSPX,TUZ,GIY,GSY,TFLO,VMBS,CWB,FLOT,STPZ,MUAC,SCHR,BABZ,HYXU,GMTB,MUNI,WIP,MUAD,QLTB,SCHP,GMMB,MUAE,IPE,NYF,BNDX,MUAF,HYMB,TIPZ,CMF,LAG,ILTB,ITE,CLY,VGSH,VGIT,LTPZ,BABS,HYHG,EMCB,DVYL,VGLT,DHS,TLO,VWOB,IGHG,GLCB,RAVI,VCSH,BSV,BND,BIV,ISHG,SDYL,VCIT,SHY,BLV,HYG,VCLT,TENZ,DTN,BIL,AUD,DLN,DTD,FTSD,CAD,STIP,CORP,HYS,HOLD,TRSY,IEF,IBDA,COBO,BOND,MINT,MBB,CSJ,AGG,SUB,EMB,CIU,GVI,MUB,GBF,TIP,AGZ,CFT,LQD,TLT,IEI,TLH,DIA,BSJF,MONY&types=quote,stats&token=
return compute(parsePhotos, response.body);
}
// A function that converts a response body into a List<Photo>.
List<Photo> parsePhotos(String responseBody) {
//final parsed = json.decode(responseBody).cast<Map<String,dynamic>>();
//return parsed.map<Photo>((json) => Photo.fromJson(json)).toList();
dynamic Obj = json.decode(responseBody);
debugPrint(responseBody, wrapWidth: 8192);
print(Obj.length);
List<Photo> photoList = [];
Obj.forEach((k, v) => photoList.add(Photo(k, v)));
return photoList;
}
class Photo {
String symbol;
//String companyName;
dynamic data;
// dynamic iexClose;
// dynamic quote;
Photo(this.symbol, this.data);
}
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
final appTitle = 'Monthly Paying ETFs';
return MaterialApp(
title: appTitle,
home: MyHomePage(title: appTitle),
);
}
}
class MyHomePage extends StatelessWidget {
final String title;
MyHomePage({Key key, this.title}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
drawer: Drawer(
// Add a ListView to the drawer. This ensures the user can scroll
// through the options in the drawer if there isn't enough vertical
// space to fit everything.
child: ListView(
// Important: Remove any padding from the ListView.
padding: EdgeInsets.zero,
children: <Widget>[
DrawerHeader(
child: Text('About'),
decoration: BoxDecoration(
color: Colors.grey,
),
),
ListTile(
title: Text(
'This app is to provide the list of ETF s that pay monthly dividend'),
onTap: () {
// Update the state of the app
// ...
// Then close the drawer
Navigator.pop(context);
},
),
ListTile(
title: Text('for questions or feedback please contact me at '),
onTap: () {
// Update the state of the app
// ...
// Then close the drawer
Navigator.pop(context);
},
),
],
),
),
appBar: AppBar(
title: Text(title),
backgroundColor: Colors.greenAccent,
),
body: FutureBuilder<List<Photo>>(
future: fetchPhotos(http.Client()),
builder: (context, snapshot) {
if (snapshot.hasError) print(snapshot.error);
return snapshot.hasData
? PhotosList(photos: snapshot.data)
: Center(child: CircularProgressIndicator());
},
),
);
}
}
class PhotosList extends StatefulWidget {
final List<Photo> photos;
PhotosList({Key key, this.photos})
: assert(photos != null),
super(key: key);
@override
_PhotosListState createState() => _PhotosListState();
}
class _PhotosListState extends State<PhotosList> {
@override
Widget build(BuildContext context) {
return bodyData();
}
SingleChildScrollView bodyData() => SingleChildScrollView(
scrollDirection: Axis.vertical,
// padding: EdgeInsets.all(0.0),
//padding: const EdgeInsets.symmetric(
// padding: new EdgeInsets.fromLTRB(0.001, .001, 1.0, 1.0),
padding: EdgeInsets.all(0.05),
// child: FittedBox(fit:BoxFit.contain,
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: FittedBox(
fit: BoxFit.fitHeight,
child: DataTable(
// sortColumnIndex: 1,
// sortAscending: true,
columns: <DataColumn>[
DataColumn(
label: Text("Company"),
onSort: (_, __) {
setState(() {
widget.photos.sort((a, b) => a.data["quote"]
["companyName"]
.compareTo(b.data["quote"]["companyName"]));
});
},
),
DataColumn(
label: Text("ttmDivRate"),
numeric: true,
onSort: (_, __) {
setState(() {
widget.photos.sort((a, b) => a.data["quote"]
["ttmDividendRate"]
.compareTo(b.data["quote"]["ttmDividendRate"]));
});
},
),
DataColumn(
label: Text("Price"),
numeric: true,
onSort: (_, __) {
setState(() {
widget.photos.sort((a, b) => a.data["quote"]
["latestPrice"]
.compareTo(b.data["quote"]["latestPrice"]));
});
},
),
],
rows: widget.photos
.map(
(photo) => DataRow(
cells: [
DataCell(
Text(
'${photo.data["stats"]["companyName"] ?? ""}'),
),
DataCell(
Text(
'${photo.data["stats"]["ttmDividendRate"] ?? ""}'),
),
//["quote"]["stats"]
DataCell(Text(
'${photo.data["stats"]["latestPrice"] ?? ""}')),
],
),
)
.toList())),
),
);
}