flutter_engine_state 0.0.5

A simple plugin to know whether the engine flutter is already detached or still attached

example/lib/main.dart

import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:flutter_engine_state/flutter_engine_state.dart';
import 'package:shared_preferences/shared_preferences.dart';

@pragma('vm:entry-point')
Future<void> handleBackgroundGoogleMessage(
  RemoteMessage message,
) async {
  debugPrint('\n==========BACKGROUND==========\n');
  debugPrint('Got a message whilst in the background!');
  var sp = await SharedPreferences.getInstance();
  // Syncing between native and flutter
  await sp.reload();
  var state = sp.getInt("flutterEngineState");
  if (state != null) {
    debugPrint('flutterEngineState: $state');
  }
}

void main() {
  Firebase.initializeApp();
  FirebaseMessaging.onBackgroundMessage(handleBackgroundGoogleMessage);
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  final _flutterEngineStatePlugin = FlutterEngineState();

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion = await _flutterEngineStatePlugin.getPlatformVersion() ??
          'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Text('Running on: $_platformVersion\n'),
        ),
      ),
    );
  }
}