Flutter track AppLifecycleState debug

Sample test

import 'package:flutter/material.dart';
import 'package:nft/utils/app_log.dart';

class HomePage extends StatefulWidget {
  const HomePage({Key key}) : super(key: key);

  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage>
    with WidgetsBindingObserver {
  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    /// Log app life cycle state
    logger.d(state);
  }

  @override
  Widget build(BuildContext context) {
    return Container();
  }
}

Output

- App is opening
- Press home
flutter: [D]  AppLifecycleState.inactive
flutter: [D]  AppLifecycleState.paused

- Open app by tap on app icon
flutter: [D]  AppLifecycleState.inactive
flutter: [D]  AppLifecycleState.resumed

- In recent application (double home tap on iPhone)
flutter: [D]  AppLifecycleState.inactive

- Kill app from recent application
flutter: [D]  AppLifecycleState.paused

About ‘detached’ state

When the application is in this state, the engine is running without a view. It can either be in the progress of attaching a view when engine was first initializes, or after the view being destroyed due to a Navigator pop. -Flutter-

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