After searching tons of SO answers also I wasn't able to solve this.
I tried all 4 methods of No Firebase App '[DEFAULT]' has been created - call Firebase.initializeApp() in Flutter and Firebase but, couldn't solve the bug.
I tried adding Firebase.initializeApp() on initState() but, it also didn't work.
main.dart
import 'package:flutter/material.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:dashboard/app.dart';
import 'package:url_strategy/url_strategy.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
setPathUrlStrategy();
runApp(App());
}
app.dart
import 'package:flutter/material.dart';
import 'package:dashboard/routes/help_and_support.dart';
import 'package:dashboard/routes/homepage.dart';
import 'package:dashboard/routes/items.dart';
class App extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'vipatra',
theme: ThemeData(
primarySwatch: Colors.blue,
),
initialRoute: '/',
routes: {
'/': (context) => HomePage(),
'/items': (context) => ShowItems(),
'/help-and-support': (context) => HelpAndSupport(),
},
);
}
}
homepage.dart
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:dashboard/style.dart';
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('vipatra'),
),
drawer: Drawer(
child: ListView(
padding: EdgeInsets.zero,
children: <Widget>[
DrawerHeader(
child: Text(
'',
),
decoration: BoxDecoration(
color: Colors.blue,
),
),
ListTile(
leading: Icon(
Icons.inventory,
),
title: Text('Items'),
onTap: () {
Navigator.pushNamed(context, '/items');
},
),
ListTile(
leading: Icon(
Icons.reorder,
),
title: Text('All Transactions'),
onTap: () {
// Update the state of the app.
// ...
},
),
ListTile(
leading: Icon(
Icons.help_outline,
),
title: Text(
'Help & Support',
),
onTap: () {
Navigator.pushNamed(context, '/help-and-support');
},
)
],
),
),
body: SingleChildScrollView(
child: Container(
alignment: Alignment.center,
child: ConstrainedBox(
constraints: BoxConstraints(
maxWidth: 800,
),
child: Column(
children: [
Container(
alignment: Alignment.centerLeft,
padding: EdgeInsets.symmetric(
horizontal: 15,
vertical: 10,
),
child: Text(
'Items',
style: headerTextStyle,
),
),
Container(
padding: EdgeInsets.only(
bottom: 25,
),
child: Items(),
),
],
),
),
),
),
);
}
String? uid;
late List<Map<String, String>> items;
Future<String?> getUserId() async {
FirebaseAuth auth = FirebaseAuth.instance;
if (auth.currentUser != null) {
String uid = auth.currentUser!.uid;
print(uid);
return uid;
} else {
return null;
}
}
void getItems() async {
FirebaseFirestore db = FirebaseFirestore.instance;
db
.collection('biz')
.doc('demo')
.collection('items')
.get()
.then((QuerySnapshot<Map<String, dynamic>> querySnapshot) {
querySnapshot.docs.forEach((doc) {
items.add({
'name': doc.data()['item']['name'],
'price': doc.data()['item']['price'],
});
});
});
}
}
class Items extends StatefulWidget {
@override
_ItemsState createState() => _ItemsState();
}
class _ItemsState extends State<Items> {
@override
Widget build(BuildContext context) {
CollectionReference<Map<String, dynamic>> items = FirebaseFirestore.instance
.collection('biz')
.doc('biz-id')
.collection('items');
return StreamBuilder<QuerySnapshot<Map<String, dynamic>>>(
stream: items.snapshots(),
builder: (BuildContext context,
AsyncSnapshot<QuerySnapshot<Map<String, dynamic>>> snapshot) {
if (snapshot.hasError) {
return Text('Something went wrong');
}
if (snapshot.connectionState == ConnectionState.waiting) {
return Text("Loading");
}
return ListView.builder(
shrinkWrap: true,
itemCount: snapshot.data!.docs.length,
itemBuilder: (context, index) {
DocumentSnapshot<Map<String, dynamic>> document =
snapshot.data!.docs[index];
return Card(
child: ListTile(
onTap: () {},
leading: Text(
document.data()!['item']['name'],
),
title: Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
Container(
child: Text(
'₹ ${document.data()!['item']['price'].toString()}',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w500,
),
),
),
],
),
),
);
},
);
},
);
}
}
pubspec.yaml
name: dashboard
description: A new Flutter project.
publish_to: "none"
# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1
environment:
sdk: ">=2.12.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
url_launcher: ^6.0.4
url_strategy: ^0.2.0
firebase_core: ^1.2.0
cloud_firestore: ^2.2.0
firebase_auth: ^1.2.0
dev_dependencies:
flutter_test:
sdk: flutter
# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:
uses-material-design: true
# To add assets to your application, add an assets section, like this:
# assets:
# - images/a_dot_burr.jpeg
# - images/a_dot_ham.jpeg
# An image asset can refer to one or more resolution-specific "variants", see
# https://flutter.dev/assets-and-images/#resolution-aware.
# For details regarding adding assets from package dependencies, see
# https://flutter.dev/assets-and-images/#from-packages
# To add custom fonts to your application, add a fonts section here,
# in this "flutter" section. Each entry in this list should have a
# "family" key with the font family name, and a "fonts" key with a
# list giving the asset and other descriptors for the font. For
# example:
# fonts:
# - family: Schyler
# fonts:
# - asset: fonts/Schyler-Regular.ttf
# - asset: fonts/Schyler-Italic.ttf
# style: italic
# - family: Trajan Pro
# fonts:
# - asset: fonts/TrajanPro.ttf
# - asset: fonts/TrajanPro_Bold.ttf
# weight: 700
#
# For details regarding fonts from package dependencies,
# see https://flutter.dev/custom-fonts/#from-packages
Error I am getting:
The following FirebaseException was thrown building Items(dirty, state: _ItemsState#ce219):
[core/no-app] No Firebase App '[DEFAULT]' has been created - call Firebase.initializeApp()
The relevant error-causing widget was:
Items file:///C:/Users/vignesh/vipatra/dashboard/lib/routes/homepage.dart:90:26
When the exception was thrown, this was the stack:
#0 MethodChannelFirebase.app (package:firebase_core_platform_interface/src/method_channel/method_channel_firebase.dart:122:5)
#1 Firebase.app (package:firebase_core/src/firebase.dart:54:41)
#2 FirebaseFirestore.instance (package:cloud_firestore/src/firestore.dart:27:21)
#3 _ItemsState.build (package:dashboard/routes/homepage.dart:142:73)
#4 StatefulElement.build (package:flutter/src/widgets/framework.dart:4691:27)
#5 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4574:15)
#6 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
#7 Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
#8 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4553:5)
#9 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4737:11)
#10 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4548:5)
... Normal element mounting (10 frames)
#20 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
#21 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
#22 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6232:32)
... Normal element mounting (109 frames)
#131 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
#132 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
#133 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6232:32)
... Normal element mounting (238 frames)
#371 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
#372 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
#373 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6232:32)
... Normal element mounting (360 frames)
#733 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
#734 Element.updateChild (package:flutter/src/widgets/framework.dart:3360:20)
#735 RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:1189:16)
#736 RenderObjectToWidgetElement.update (package:flutter/src/widgets/binding.dart:1167:5)
#737 RenderObjectToWidgetElement.performRebuild (package:flutter/src/widgets/binding.dart:1181:7)
#738 Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
#739 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2582:33)
#740 AutomatedTestWidgetsFlutterBinding.drawFrame (package:flutter_test/src/binding.dart:1106:19)
#741 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:328:5)
#742 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1144:15)
#743 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1082:9)
#744 AutomatedTestWidgetsFlutterBinding.pump.<anonymous closure> (package:flutter_test/src/binding.dart:973:9)
#747 TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:71:41)
#748 AutomatedTestWidgetsFlutterBinding.pump (package:flutter_test/src/binding.dart:960:27)
#749 WidgetTester.pumpWidget.<anonymous closure> (package:flutter_test/src/widget_tester.dart:534:22)
#752 TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:71:41)
#753 WidgetTester.pumpWidget (package:flutter_test/src/widget_tester.dart:531:27)
#754 main.<anonymous closure> (file:///C:/Users/vignesh/vipatra/dashboard/test/widget_test.dart:6:18)
#755 main.<anonymous closure> (file:///C:/Users/vignesh/vipatra/dashboard/test/widget_test.dart:5:28)
#756 testWidgets.<anonymous closure>.<anonymous closure> (package:flutter_test/src/widget_tester.dart:156:29)
<asynchronous suspension>
<asynchronous suspension>
(elided 5 frames from dart:async and package:stack_trace)
════════════════════════════════════════════════════════════════════════════════════════════════════
00:04 +0 -1: Demo test [E]
Test failed. See exception logs above.
The test description was: Demo test
00:05 +0 -1: Some tests failed.
