Flutter Learning Roadmap — What to Learn and How to Go From Beginner to Expert

The Flutter Learning Phases

Flutter knowledge builds in layers. Each phase depends on the previous one. Skipping phases is the #1 reason learners get stuck.

Phase 2 — Widget Fundamentals

Everything in Flutter is a Widget. A Widget is a Dart class that describes a piece of UI. Understanding widgets deeply is the most important skill in Flutter.

The two types of widgets you must master:

// StatelessWidget — UI that never changes after it's built
class GreetingCard extends StatelessWidget {
  final String name;
  const GreetingCard({super.key, required this.name});

  @override
  Widget build(BuildContext context) {
    return Text('Hello, $name!');
  }
}

// StatefulWidget — UI that can change (interactive)
class Counter extends StatefulWidget {
  const Counter({super.key});
  @override
  State<Counter> createState() => _CounterState();
}

class _CounterState extends State<Counter> {
  int _count = 0;  // This is the STATE

  void _increment() {
    setState(() {   // Tell Flutter to rebuild with new state
      _count++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Text('Count: $_count'),
        ElevatedButton(onPressed: _increment, child: const Text('+'))
      ],
    );
  }
}

Layout widgets to master in Phase 2:

• Column — stack widgets vertically
• Row — stack widgets horizontally
• Stack — layer widgets on top of each other
• Container — box with padding, margin, color, border
• Expanded / Flexible — fill available space
• ListView — scrollable list of widgets
• GridView — scrollable grid of widgets
• Padding / SizedBox / Center — spacing and alignment

Project to build: A profile card screen — photo, name, bio, social links. Pure UI, no logic yet.

Phase 5 — Backend Integration

Real apps need data from the internet. Phase 5 connects your Flutter app to the world.

REST API calls with http package:

import 'dart:convert';
import 'package:http/http.dart' as http;

class ApiService {
  static const baseUrl = 'https://api.rrskillverse.in';

  static Future<List<Topic>> getTopics() async {
    final response = await http.get(Uri.parse('$baseUrl/topics'));

    if (response.statusCode == 200) {
      final List data = jsonDecode(response.body);
      return data.map((json) => Topic.fromJson(json)).toList();
    } else {
      throw Exception('Failed to load topics');
    }
  }
}

What to learn in Phase 5:

• HTTP requests — GET, POST, PUT, DELETE using the http package
• JSON parsing — converting JSON to Dart objects with fromJson/toJson
• Firebase — Firestore for database, Auth for login, Storage for files
• SharedPreferences — simple local key-value storage (user settings, tokens)
• SQLite / Hive — local database for offline-first apps

Project to build: A weather app — call a real weather API, show current weather and 5-day forecast, save last searched city in SharedPreferences.