berkanaslan

import 'package:online_tpi_qms_mobile/model/user/user.dart';
import 'dart:convert';
import 'package:shared_preferences/shared_preferences.dart';

class SharedPrefs {
  static SharedPreferences _sharedPrefs;
  static Map<String, dynamic> _memoryPrefs = Map<String, dynamic>();

  factory SharedPrefs() => SharedPrefs._internal();

berkanaslan

import 'package:flutter/material.dart';
/// [Screen] Ekran oluşturrurken gereken tüm bilgileri tutacak
class Screen {
 /// BottomNavigationBar'da gösterilecek olan başlık
 final String title;

 /// BottomNavigationBar'da gösterilecek olan ikon
 final IconData icon;
 
 /// Ekranda akacak olan WidgetTree tutucusu

berkanaslan

const FIRST_SCREEN = 0;
const SECOND_SCREEN = 1;
const THIRD_SCREEN = 2;
const FOURTH_SCREEN = 3;

berkanaslan

class FirstScreen extends StatelessWidget {
  static const route = '/first';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('First Screen')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,

berkanaslan

class NavigationProvider extends ChangeNotifier {
  /// [NavigationProvider] edinmek için shortcode
  static NavigationProvider of(BuildContext context) =>
      Provider.of<NavigationProvider>(context, listen: false);

  // Açılış sayfası
  int _currentScreenIndex = FIRST_SCREEN;
  int get currentTabIndex => _currentScreenIndex;

  Route<dynamic> onGenerateRoute(RouteSettings settings) {

berkanaslan

   void setTab(int tab) {
    if (tab == currentTabIndex) {
      // TODO: Ekranın en üstüne dönme işlemleri: _scrollToTopOfPage();
    } else {
      _currentScreenIndex = tab;
      notifyListeners();
    }
  }
//...

berkanaslan

class Root extends StatelessWidget {
  static const route = '/';

  @override
  Widget build(BuildContext context) {
    return Consumer<NavigationProvider>(
      builder: (context, provider, child) {
        // Tanımladığımız screen'lardan BottomNavigationBar oluşturma
        final bottomNavigationBarItems = provider.screens
            .map(

berkanaslan

 Future<bool> onWillPop(BuildContext context) async {
    final currentNavigatorState = currentScreen.navigatorState.currentState;

    if (currentNavigatorState.canPop()) {
      currentNavigatorState.pop();
      return false;
    } else {
      if (currentTabIndex != FIRST_SCREEN) {
        setTab(FIRST_SCREEN);
        notifyListeners();

berkanaslan

 .... 
 Route<dynamic> onGenerateRoute(RouteSettings settings) {
    print('Oluşturulan rota: ${settings.name}');
    switch (settings.name) {
      case PushedScreen.route:
        return MaterialPageRoute(builder: (_) => PushedScreen());
      case SimpleScreen.route:
        return MaterialPageRoute(builder: (_) => SimpleScreen());
      default:
        return MaterialPageRoute(builder: (_) => Root());

berkanaslan

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

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        ChangeNotifierProvider(create: (_) => NavigationProvider()),
      ],
      child: Builder(