page_life_cycle 1.0.9

Because the widget of the flitter does not route the Onshow and onhide events, the Onshow and onhide events of the widget are added according to the routing changes.

example/lib/main.dart

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

import 'package:flutter/services.dart';
import 'package:page_life_cycle/page_life_cycle.dart';
import 'route.dart';
import 'package:fluro/fluro.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';

  @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.
    try {} 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) {
    final router = new Router();
    Routes.configureRoutes(router);
    return MaterialApp(
      onGenerateRoute: Routes.router.generator,
      navigatorObservers: [PageNavigatorObserver()],
    );
  }
}