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refactor: split app wrapper from focused example code (multi-file apps)

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Convert 17 multi-file apps to the validated pattern: lib/main.dart keeps
only the MaterialApp bootstrap; a new lib/example.dart holds the full entry
screen and focused example code, importing existing supporting files
(screens/, tabs/, services/, models/, widgets/, utils/).

Apps: analytics_integration, animation_example, biometrics, bottom_sheet,
custom_home_drawer, google_signin, grid_layout, handling_routes,
image_editor, scan_qr_code, statless_counter_app, using_bottom_nav_bar,
using_custom_fonts, using_listview, using_listwheelscrollview,
using_platform_adaptive, view_pdf_file
This commit is contained in:
Nishant Srivastava
2026-08-18 00:48:50 +02:00
parent 780c0f1dbb
commit 6e3ff94bfe
34 changed files with 1002 additions and 766 deletions
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124
analytics_integration/lib/main.dart
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@@ -1,5 +1,4 @@
import 'package:analytics_integration/single_item_tile.dart';
import 'package:firebase_analytics/firebase_analytics.dart';
import 'package:analytics_integration/example.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
@@ -8,19 +7,10 @@ void main() async {
/// initialize your firebase project
await Firebase.initializeApp();
runApp(FlutterAnalyticsApp());
runApp(const FlutterAnalyticsApp());
}
class FlutterAnalyticsApp extends StatelessWidget {
/// create instance of FirebaseAnalytics as [analytics]
static FirebaseAnalytics analytics = FirebaseAnalytics.instance;
/// create observer for FirebaseAnalytics as [observer]
/// this observer sends events to Firebase Analytics when the
/// currently active route changes.
static FirebaseAnalyticsObserver observer =
FirebaseAnalyticsObserver(analytics: analytics);
const FlutterAnalyticsApp({super.key});
@override
@@ -35,114 +25,8 @@ class FlutterAnalyticsApp extends StatelessWidget {
/// this is used to observe navigation changes in the app
/// and sending data back to Firebase Analytics
navigatorObservers: <NavigatorObserver>[observer],
home: FlutterAnalyticsHome(
title: 'Flutter Analytics',
analytics: analytics,
observer: observer,
),
);
}
}
class FlutterAnalyticsHome extends StatefulWidget {
final String title;
final FirebaseAnalytics analytics;
final FirebaseAnalyticsObserver observer;
const FlutterAnalyticsHome({
super.key,
required this.title,
required this.analytics,
required this.observer,
});
@override
_FlutterAnalyticsHomeState createState() => _FlutterAnalyticsHomeState();
}
class _FlutterAnalyticsHomeState extends State<FlutterAnalyticsHome> {
late FirebaseAnalytics _analytics;
@override
void initState() {
/// initializing data to local variable [_analytics] for Firebase Analytics
/// that we made before for local use
_analytics = widget.analytics;
//// below three events are related to user which we are
//// sending to Firebase Analytics
_setUserIdInAnalytics();
_setUserPropertyInAnalytics();
_currentScreen();
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
title: Center(
child: Text(widget.title),
),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: ListView(
shrinkWrap: true,
children: <Widget>[
SizedBox(
height: 16,
),
SingleItemTile(
itemName: 'Carrot',
analytics: _analytics,
quantity: 1,
price: '100Rs',
),
SizedBox(
height: 16,
),
SingleItemTile(
itemName: 'Baby Carrot',
analytics: _analytics,
quantity: .5,
price: '50Rs',
),
SizedBox(
height: 16,
),
],
),
),
);
}
//// to create a unique user identifier for Analytics
//// send user id(if you app has)
Future<void> _setUserIdInAnalytics() async {
await _analytics.setUserId(id: 'alksj39hnfn49skvnghqwp40sm');
}
//// sending user related field to Analytics
/// below [name] is the name of the user property to set
/// [value] is the values of that property
Future<void> _setUserPropertyInAnalytics() async {
await _analytics.setUserProperty(
name: 'email',
value: 'johndoe@gmail.com',
);
}
/// Setting the current Screen of the app in [screenName]
/// and sending back to Analytics
Future<void> _currentScreen() async {
await _analytics.logEvent(
name: 'screen_view',
parameters: <String, Object>{
'screen_name': 'FlutterAnalyticsHome',
'screen_class': 'FlutterAnalyticsHome',
},
navigatorObservers: <NavigatorObserver>[Example.observer],
home: const Example(),
);
}
}