Lifecycle Widget

The widget provided in this package 'LifecycleWidget' will emulate the lifecycle of an Activity or ViewController, providing the tools to intercept creation, resuming, pausing and disposing of the widget.

Platform Support

This package has been created for mobile support. Other platform may work, but they didn't have been tested.

Requirements

• Flutter >=3.10.0
• Dart >=3.0.0

Setup

Before you can use the LifecycleWidget, you have to create a RouteObserver and add it to you MaterialApp.

final RouteObserver<ModalRoute<dynamic>> routeObserver = RouteObserver<ModalRoute<dynamic>>();

class MyApp extends StatelessWidget {
  MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'MyApp',
      home: MyPage(),
      navigatorObservers: [
        routeObserver // <--- add it here
      ],
    );
  }
}

Usage

By wrapping your page in the LifecycleWidget, you can provide callback function to each event available.

import 'package:app_lifecycle_widget/app_lifecycle_widget.dart';

...

@override
  Widget build(BuildContext context) {
    return LifecycleWidget(
      onAppPaused: () => _addEvent('onAppPaused'),
      onPaused: () => _addEvent('onPaused'),
      onDispose: () => _addEvent('onDispose'),
      onResumed: () => _addEvent('onResumed'),
      onAppResumed: () => _addEvent('onAppResumed'),
      onCreate: () => _addEvent('onCreate'),
      onResumedFromStack: () => _addEvent('onResumedFromStack'),
      child: Scaffold(...),
    );
  }

This widget provides few overlapping methods for handling the resume state, in case you need a more granular management of your widget's lifecycle.

The onResumed method will be triggered on each instance of widget resume event, overlapping with the other events:

• when created (overlapping with onCreate method);
• when the user comes back from another view (overlapping with onResumedFromStack method);
• when the user resumes the app from a background state (overlapping with onAppResumed method); If you want to handle all resume events singularly, don't define the onResumed method.