I have a list in a database and each item in the list has specific characteristics I want when I choose an item from the list; the detail_list page only displays the characteristics of this element by retrieving it from the firebase database.
- the home page shows me all the customer cards
- Detail page displays Detail card -detail card retrieve widgets from Card_Front -Card_Front shows me the details of the element I have chosen
=> how to retrieve the item selected in the list to display its details
HomePage
import 'dart:math';
import 'package:clickable_list_wheel_view/clickable_list_wheel_widget.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:../rotate/detail_page.dart';
import 'package:../rotate/page_notifier.dart';
import 'package:../rotate/size_config.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
class PageHome extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<PageHome> {
bool animateCardNumber = true;
final _scrollController = FixedExtentScrollController();
double _itemHeight = 60;
int _itemCount = 100;
@override
void initState() {
SystemChrome.setEnabledSystemUIOverlays([]);
super.initState();
}
@override
Widget build(BuildContext context) {
FirebaseAuth auth = FirebaseAuth.instance;
User user = auth.currentUser;
CollectionReference _productss = FirebaseFirestore.instance
.collection('Card')
.doc(user.uid)
.collection(user.uid);
SizeConfig().init(context);
return Scaffold(
backgroundColor: Colors.black,
appBar: AppBar(
backgroundColor: Colors.black,
leading: Icon(
Icons.arrow_back,
color: Colors.white,
size: SizeConfig.defaultHeight * 4,
),
),
body: SafeArea(
child: StreamBuilder(
stream: _productss.snapshots(),
builder: (context, AsyncSnapshot<QuerySnapshot> streamSnapshot) {
if (!streamSnapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
}
return ClickableListWheelScrollView(
scrollController: _scrollController,
itemHeight: 250,
itemCount: _itemCount,
onItemTapCallback: (indexx) {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DetailPage()));
},
child: ListWheelScrollView.useDelegate(
controller: _scrollController,
itemExtent: 250,
diameterRatio: 3,
offAxisFraction: -0.5,
physics: FixedExtentScrollPhysics(),
overAndUnderCenterOpacity: 0.5,
perspective: 0.002,
childDelegate: ListWheelChildBuilderDelegate(
childCount: streamSnapshot.data.docs.length,
builder: (context, index) {
final DocumentSnapshot documentSnapshot =
streamSnapshot.data.docs[0];
return Container(
padding:
EdgeInsets.only(bottom: SizeConfig.defaultHeight * 5),
child: AspectRatio(
aspectRatio: 5 / 3,
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
gradient: const LinearGradient(
colors: [
Color(0xFF0000FF),
Color(0XFF377CFF),
],
begin: Alignment.bottomLeft,
end: Alignment.topRight,
stops: [0, 0.8],
tileMode: TileMode.clamp)),
child: Padding(
padding: EdgeInsets.symmetric(
horizontal: SizeConfig.defaultWidth * 2,
vertical: SizeConfig.defaultHeight * 2),
child: Column(
children: [
Expanded(
flex: 2,
child: Row(
mainAxisAlignment:
MainAxisAlignment.spaceBetween,
children: [
Text(
"Card",
style: Theme.of(context)
.textTheme
.headline6
.copyWith(
fontWeight: FontWeight.bold,
color: Colors.white),
),
Transform.rotate(
angle: pi / 2,
child: Icon(
Icons.wifi,
size: SizeConfig.defaultHeight * 4,
color: Colors.white,
),
)
],
),
),
Spacer(
flex: 1,
),
Expanded(
flex: 2,
child: Row(
children: [
Transform.translate(
offset:
Offset(-SizeConfig.defaultWidth, 0),
),
],
),
),
Spacer(
flex: 1,
),
Expanded(
flex: 2,
child: Row(
children: [
Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text(
documentSnapshot['Name'],
style: Theme.of(context)
.textTheme
.bodyText1
.copyWith(color: Colors.white),
)
],
),
],
),
)
],
),
),
),
),
);
;
},
),
),
);
},
)
),
);
}
}
Detail page
import 'package:flutter/material.dart';
import 'package:../rotate/detail_card.dart';
import 'package:../rotate/size_config.dart';
class DetailPage extends StatefulWidget {
const DetailPage({Key key}) : super(key: key);
_DetailPageState createState() => _DetailPageState();
}
class _DetailPageState extends State<DetailPage> {
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.black,
appBar: AppBar(
backgroundColor: Colors.black,
leading: IconButton(
onPressed: () => Navigator.pop(context),
icon: Icon(
Icons.arrow_back,
color: Colors.white,
size: SizeConfig.defaultHeight * 4,
),
),
actions: [
Icon(
Icons.share,
color: Colors.white,
size: SizeConfig.defaultHeight * 4,
)
],
),
body: Stack(
alignment: Alignment.topCenter,
children: [
DetailCard(),
],
),
);
}
}
Detail_card
import 'package:flutter/material.dart';
import 'back_card.dart';
import 'front_card.dart';
class DetailCard extends StatefulWidget {
@override
_DetailCardState createState() => _DetailCardState();
}
class _DetailCardState extends State<DetailCard> {
bool animateCardNumber = true;
@override
void initState() {
Future.delayed(Duration(milliseconds: 1000),
() => setState(() => animateCardNumber = false));
super.initState();
}
@override
Widget build(BuildContext context) {
return Align(
alignment: Alignment.center,
child: Padding(
padding: EdgeInsets.fromLTRB(
SizeConfig.defaultWidth * 2,
0,
SizeConfig.defaultWidth * 2,
0 > 0.462
? SizeConfig.defaultHeight * 55
: SizeConfig.defaultHeight * 20),
child:
frontWidget: FrontCard(
showCardNumber: true,
animateCardNumber: animateCardNumber,
)));
}
}
Card_Front
import 'dart:math';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:../rotate/detail_page.dart';
import 'package:../rotate/size_config.dart';
class FrontCard extends StatefulWidget {
final bool showCardNumber;
bool animateCardNumber;
final DetailPage detailPage;
FrontCard({
Key key,
this.showCardNumber = false,
this.animateCardNumber = true,
this.detailPage,
}) : super(key: key);
@override
_FrontCardState createState() => _FrontCardState();
}
class _FrontCardState extends State<FrontCard> {
@override
Widget build(BuildContext context) {
FirebaseAuth auth = FirebaseAuth.instance;
User user = auth.currentUser;
CollectionReference _productss = FirebaseFirestore.instance
.collection('Card')
.doc(user.uid)
.collection(user.uid);
return StreamBuilder(
stream: _productss.snapshots(),
builder: (context, AsyncSnapshot<QuerySnapshot> streamSnapshot) {
if (!streamSnapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
}
final DocumentSnapshot documentSnapshot = streamSnapshot.data.docs[0];
return AspectRatio(
aspectRatio: 5 / 3,
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
gradient: const LinearGradient(
colors: [
Color(0xFF0000FF),
Color(0XFF377CFF),
],
begin: Alignment.bottomLeft,
end: Alignment.topRight,
stops: [0, 0.8],
tileMode: TileMode.clamp)),
child: Padding(
padding: EdgeInsets.symmetric(
horizontal: SizeConfig.defaultWidth * 2,
vertical: SizeConfig.defaultHeight * 2),
child: Column(
children: [
Expanded(
flex: 2,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
"Rest",
style: Theme.of(context)
.textTheme
.headline6
.copyWith(
fontWeight: FontWeight.bold,
color: Colors.white),
),
Transform.rotate(
angle: pi / 2,
child: Icon(
Icons.wifi,
size: SizeConfig.defaultHeight * 4,
color: Colors.white,
),
)
],
),
),
Spacer(
flex: 1,
),
Expanded(
flex: 2,
child: Row(
children: [
Expanded(
flex: 5,
child:
Text(
animateCardNumber
? documentSnapshot['Number']
.substring(0, value)
: documentSnapshot['Number'],
textAlign: TextAlign.center,
style: Theme.of(context)
.textTheme
.headline6
.copyWith(color: Colors.white),
);
},
)
],
),
),
Spacer(
flex: 1,
),
Expanded(
flex: 2,
child: Row(
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
documentSnapshot['Name'],
style: Theme.of(context)
.textTheme
.bodyText1
.copyWith(color: Colors.white),
)
],
),
],
),
)
],
),
),
),
);
});
}
}
CodePudding user response：
You have a lot of code posted here. I will take only the part that needs my help.
onItemTapCallback: (indexx) {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
// Pass the object to the details page constructor
DetailPage(
doc: streamSnapshot.data.docs[indexx]
)));
},
class DetailCard extends StatefulWidget {
final var doc;
DetailCard({required this.doc});
@override
_DetailCardState createState() => _DetailCardState();
}
class _DetailCardState extends State<DetailCard> {
bool animateCardNumber = true;
late var doc;
@override
void initState() {
Future.delayed(Duration(milliseconds: 1000),
() => setState(() => animateCardNumber = false));
super.initState();
doc = widget.doc; // Access the document that was passed through the constructor here.
}
@override
Widget build(BuildContext context) {
return Align(
alignment: Alignment.center,
child: Padding(
padding: EdgeInsets.fromLTRB(
SizeConfig.defaultWidth * 2,
0,
SizeConfig.defaultWidth * 2,
0 > 0.462
? SizeConfig.defaultHeight * 55
: SizeConfig.defaultHeight * 20),
child:
frontWidget: FrontCard(
showCardNumber: true,
animateCardNumber: animateCardNumber,
)));
}
}
CodePudding user response：
I was able to retrieve how many squares there are at the customer's but I could not read the data from each card and display it I replaced the results with static data=> ('aaaaaa') I want to recover the data of each card but each time an error is displayed: (An exception has occurred. NoSuchMethodError (NoSuchMethodError: The method '[]' was called on null. Receiver: null Tried calling: )) how to do ?!
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:provider/provider.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:..t/rotate/page_notifier.dart';
import 'package:../rotate/size_config.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:simple_animations/simple_animations.dart';
class PageHome extends StatefulWidget {
final String id;
const PageHome({
key,
this.id,
}) : super(key: key);
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<PageHome> {
String _idDoc;
DocumentSnapshot _res;
String _id;
List<QueryDocumentSnapshot> _produit = new List();
PageNotifier _pageNotifier = PageNotifier();
@override
void initState() {
_id = widget.id;
super.initState();
_getProductFromDatabaseUsingCategory();
}
_getProductFromDatabaseUsingCategory() {
FirebaseAuth auth = FirebaseAuth.instance;
User user = auth.currentUser;
CollectionReference cartsRef = FirebaseFirestore.instance
.collection('Card')
.doc(user.uid)
.collection(user.uid);
cartsRef.where('ID', arrayContains: _id).get().then((res) {
setState(() {
_produit = res.docs;
//_res = res as DocumentSnapshot<Object>;
});
});
}
@override
Widget build(BuildContext context) {
SizeConfig().init(context);
return Scaffold(
backgroundColor: Colors.black,
appBar: AppBar(
backgroundColor: Colors.black,
leading: Icon(
Icons.arrow_back,
color: Colors.white,
size: SizeConfig.defaultHeight * 4,
),
),
body: SafeArea(
child: ChangeNotifierProvider(
create: (_) => _pageNotifier,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
//HomeHeader(),
/* Balance(
previousIndex: _previousIndex, currentIndex: _currentIndex), */
_buildCardsList(),
//_buildPageIndicator(),
],
),
),
),
);
}
_buildCardsList() => Container(
margin: EdgeInsets.fromLTRB(10, 10, 0, 10),
height: MediaQuery.of(context).size.height - 250,
child: Expanded(
child: Transform(
transform: Matrix4.identity()
..translate(-SizeConfig.defaultWidth * 4)
..rotateZ(-pi / 2),
alignment: Alignment.center,
child: PageView.builder(
scrollDirection: Axis.vertical,
itemCount: _produit.length,
controller: _pageNotifier.pageController,
onPageChanged: (index) => setState(() {
_previousIndex = _currentIndex;
_currentIndex = index;
}),
itemBuilder: (context, index) {
return Consumer<PageNotifier>(
builder: (context, value, child) {
if (value.currentPage > index) {
double scaleFactor =
max(1 - (value.currentPage - index) * 0.4, 0.6);
double angleFactor =
min((value.currentPage - index) * 20, 20);
return Transform(
transform: Matrix4.identity()
..setEntry(3, 2, 0.001)
..scale(scaleFactor)
..rotateZ(-(pi / 180) * angleFactor),
alignment: Alignment.center,
child: child,
);
}
return child;
},
child: GestureDetector(
onTap: () {
String id = _produit[index].id;
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Scaffold(
backgroundColor: Colors.black,
appBar: AppBar(
backgroundColor: Colors.black,
leading: IconButton(
onPressed: () =>
Navigator.pop(context),
icon: Icon(
Icons.arrow_back,
color: Colors.white,
size: SizeConfig.defaultHeight * 4,
),
),
actions: [
Padding(
padding: EdgeInsets.only(
right: SizeConfig.defaultWidth *
2),
child: Icon(
Icons.share,
color: Colors.white,
size:
SizeConfig.defaultHeight * 4,
),
)
],
),
body: Stack(
alignment: Alignment.topCenter,
children: [
PlayAnimation(
tween:
Tween(begin: 0.2, end: 1.0),
curve: Curves.easeOut,
duration:
Duration(milliseconds: 200),
builder: (context, child,
value) =>
Transform.scale(
scale: value,
alignment: Alignment.center,
child: Opacity(
opacity: value,
child: child),
),
child: Align(
alignment: Alignment.center,
child: Padding(
padding: EdgeInsets.fromLTRB(
SizeConfig
.defaultWidth *
2,
0,
SizeConfig
.defaultWidth *
2,
0 > 0.462
? SizeConfig
.defaultHeight *
55
: SizeConfig.defaultHeight *
20
0 * 600),
child: Transform.scale(
scale: 0 > 0.462
? 1 - (0 - 0.462)
: 1,
child: FlippableWidget(
frontWidget:
FrontCard(
HolderName: _produit[
"HolderName"],
Number: '5555555',
ExpiryNumber:
'aaaaaa',
),
)),
))),
],
),
)));
},
child: Container(
padding: EdgeInsets.only(
bottom: SizeConfig.defaultHeight * 5),
child: FrontCard(
HolderName: 'aaaaaaaaaa',
Number: 'aaaaaa',
ExpiryNumber: 'aaaaaa',
),
),
),
);
}),
),
),
);
}