عالم التطوير المتكامل: Firebase وFlutter يدًا بيد

flutter create firebase_flutter_project
cd firebase_flutter_project

dependencies:
  flutter:
    sdk: flutter
  firebase_core: ^1.10.0
  firebase_auth: ^3.3.0
  cloud_firestore: ^3.1.0

flutter pub get

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

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Firebase Demo',
      home: HomePage(),
    );
  }
}

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

class LoginPage extends StatefulWidget {
  @override
  _LoginPageState createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  final FirebaseAuth _auth = FirebaseAuth.instance;
  final TextEditingController _emailController = TextEditingController();
  final TextEditingController _passwordController = TextEditingController();

  Future<void> _signIn() async {
    try {
      UserCredential userCredential = await _auth.signInWithEmailAndPassword(
        email: _emailController.text,
        password: _passwordController.text,
      );
      print("User signed in: ${userCredential.user!.uid}");
    } catch (e) {
      print("Error during sign in: $e");
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Login')),
      body: Padding(
        padding: EdgeInsets.all(16.0),
        child: Column(
          children: [
            TextField(
              controller: _emailController,
              decoration: InputDecoration(labelText: 'Email'),
            ),
            TextField(
              controller: _passwordController,
              decoration: InputDecoration(labelText: 'Password'),
              obscureText: true,
            ),
            ElevatedButton(
              onPressed: _signIn,
              child: Text('Sign In'),
            ),
          ],
        ),
      ),
    );
  }
}

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

class RealtimeDatabaseExample extends StatefulWidget {
  @override
  _RealtimeDatabaseExampleState createState() => _RealtimeDatabaseExampleState();
}

class _RealtimeDatabaseExampleState extends State<RealtimeDatabaseExample> {
  final DatabaseReference _database = FirebaseDatabase.instance.reference().child('messages');
  final TextEditingController _messageController = TextEditingController();

  void _sendMessage() {
    if (_messageController.text.isNotEmpty) {
      _database.push().set({
        'text': _messageController.text,
        'timestamp': ServerValue.timestamp,
      });
      _messageController.clear();
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Realtime Database Example')),
      body: Column(
        children: [
          Expanded(
            child: StreamBuilder(
              stream: _database.onValue,
              builder: (context, snapshot) {
                if (snapshot.hasData && !snapshot.hasError && snapshot.data!.snapshot.value != null) {
                  var messages = Map<dynamic, dynamic>.from(snapshot.data!.snapshot.value as Map);
                  List<Widget> messageWidgets = [];
                  messages.forEach((key, value) {
                    messageWidgets.add(ListTile(
                      title: Text(value['text']),
                      subtitle: Text(DateTime.fromMillisecondsSinceEpoch(value['timestamp']).toString()),
                    ));
                  });
                  return ListView(children: messageWidgets.reversed.toList());
                } else {
                  return Center(child: CircularProgressIndicator());
                }
              },
            ),
          ),
          Padding(
            padding: EdgeInsets.all(8.0),
            child: Row(
              children: [
                Expanded(
                  child: TextField(
                    controller: _messageController,
                    decoration: InputDecoration(hintText: 'Enter message'),
                  ),
                ),
                IconButton(
                  icon: Icon(Icons.send),
                  onPressed: _sendMessage,
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

import 'dart:io';
import 'package:firebase_storage/firebase_storage.dart';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';

class CloudStorageExample extends StatefulWidget {
  @override
  _CloudStorageExampleState createState() => _CloudStorageExampleState();
}

class _CloudStorageExampleState extends State<CloudStorageExample> {
  File? _image;
  final picker = ImagePicker();

  Future getImage() async {
    final pickedFile = await picker.getImage(source: ImageSource.gallery);

    setState(() {
      if (pickedFile != null) {
        _image = File(pickedFile.path);
      }
    });
  }

  Future<void> uploadFile() async {
    if (_image == null) return;
    try {
      final ref = FirebaseStorage.instance.ref().child('uploads/${DateTime.now().toString()}');
      await ref.putFile(_image!);
      final url = await ref.getDownloadURL();
      print("File uploaded: $url");
    } catch (e) {
      print("Error during upload: $e");
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Cloud Storage Example')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            _image == null
                ? Text('No image selected.')
                : Image.file(_image!, height: 200),
            ElevatedButton(
              onPressed: getImage,
              child: Text('Pick Image'),
            ),
            Elev