Creating a Finance Tracker Application in Flutter
Last Updated : 16 Aug, 2024
Developing a new tracker for finance is a good practice to improve your skills and build a helpful application. Through Flutter, an open-source UI toolkit developed by Google, it is possible to design for iOS/ Android, web, and desktop. Here you will find out the recipe of how to create a finance tracker application in Flutter excluding UI components that are not essential to such an application. By the end you should have a functional Android application with a feature for tracking expenses with a category, and an amount and a date and the data is stored locally using SQLite.
How to Build a Finance Tracker App in Flutter
To develop a finance tracker app using Flutter, follow these steps:
Project Directory Structure
Before diving into the code, let's look at the directory structure of our project:
Steps to Create a Finance Tracker App in Flutter
Step 1: Create a New Flutter Project
Open your terminal and create a new Flutter project by running the following command:
flutter create finance_tracker
cd finance_tracker
Step 2: Add Dependencies
To manage state and store data, we need to add the provider, intl, sqflite, and path_provider packages. Open the pubspec.yaml file and add the following dependencies:
Dart dependencies: flutter: sdk: flutter provider: ^6.0.3 intl: ^0.17.0 sqflite: ^2.0.0+4 path_provider: ^2.0.2
Run flutter pub get to install the packages.
Step 3: Define the Data Model
Create a file lib/models/transaction.dart to define the Transaction data model:
Dart class Transaction { final String id; final String category; final double amount; final DateTime date; Transaction({ required this.id, required this.category, required this.amount, required this.date, }); }
Step 4: State Management with Provider
Create a file lib/providers/transactions.dart to manage the state using the Provider package:
Dart import 'package:flutter/foundation.dart'; import '../models/transaction.dart'; import '../helpers/db_helper.dart'; class TransactionsProvider with ChangeNotifier { List<Transaction> _transactions = []; List<Transaction> get transactions => _transactions; void addTransaction(String category, double amount, DateTime date) { final newTransaction = Transaction( id: DateTime.now().toString(), category: category, amount: amount, date: date, ); _transactions.add(newTransaction); notifyListeners(); DBHelper.insert('transactions', { 'id': newTransaction.id, 'category': newTransaction.category, 'amount': newTransaction.amount, 'date': newTransaction.date.toIso8601String(), }); } Future<void> fetchAndSetTransactions() async { final dataList = await DBHelper.getData('transactions'); _transactions = dataList .map( (item) => Transaction( id: item['id'], category: item['category'], amount: item['amount'], date: DateTime.parse(item['date']), ), ) .toList(); notifyListeners(); } }
Step 5: Main Application Setup
Update lib/main.dart to set up the main structure of the app:
Dart import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import './providers/transactions.dart'; import './screens/home_screen.dart'; import './screens/add_transaction_screen.dart'; void main() { runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({super.key}); @override Widget build(BuildContext context) { return ChangeNotifierProvider( create: (ctx) => TransactionsProvider(), child: MaterialApp( title: 'Finance Tracker', theme: ThemeData( primarySwatch: Colors.blue, ), home: const HomeScreen(), routes: { AddTransactionScreen.routeName: (ctx) => const AddTransactionScreen(), }, ), ); } }
Step 6: Home Screen
Create a file lib/screens/home_screen.dart to display the list of transactions and provide a button to add new ones:
Dart import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import '../providers/transactions.dart'; import '../widgets/transaction_list.dart'; import 'add_transaction_screen.dart'; class HomeScreen extends StatelessWidget { const HomeScreen({super.key}); @override Widget build(BuildContext context) { final transactionsProvider = Provider.of<TransactionsProvider>(context); return Scaffold( appBar: AppBar( title: const Text('Finance Tracker'), ), body: FutureBuilder( future: transactionsProvider.fetchAndSetTransactions(), builder: (ctx, snapshot) => transactionsProvider.transactions.isEmpty ? const Center( child: Text("No transactions!"), ) : TransactionList(transactionsProvider.transactions), ), floatingActionButton: FloatingActionButton( child: const Icon(Icons.add), onPressed: () { Navigator.of(context).pushNamed(AddTransactionScreen.routeName); }, ), ); } }
Step 7: Transaction List Widget
Create a file lib/widgets/transaction_list.dart to display the list of transactions:
Dart import 'package:flutter/material.dart'; import '../models/transaction.dart'; class TransactionList extends StatelessWidget { final List<Transaction> transactions; const TransactionList(this.transactions, {super.key}); @override Widget build(BuildContext context) { return ListView.builder( itemCount: transactions.length, itemBuilder: (ctx, index) { return GestureDetector( onLongPress: () { }, child: Card( child: ListTile( title: Text(transactions[index].category), subtitle: Text(transactions[index].date.toString()), trailing: Text('\$${transactions[index].amount.toString()}'), ), ), ); }, ); } }
Step 8: Add Transaction Screen
Create a file lib/screens/add_transaction_screen.dart to add new transactions:
Dart import 'package:flutter/material.dart'; import 'package:provider/provider.dart'; import '../providers/transactions.dart'; class AddTransactionScreen extends StatefulWidget { static const routeName = '/add-transaction'; const AddTransactionScreen({super.key}); @override _AddTransactionScreenState createState() => _AddTransactionScreenState(); } class _AddTransactionScreenState extends State<AddTransactionScreen> { final _formKey = GlobalKey<FormState>(); String _category = 'Food'; double _amount = 0; DateTime _selectedDate = DateTime.now(); void _submitForm() { if (_formKey.currentState!.validate()) { _formKey.currentState!.save(); Provider.of<TransactionsProvider>(context, listen: false) .addTransaction(_category, _amount, _selectedDate); Navigator.of(context).pop(); } } void _presentDatePicker() { showDatePicker( context: context, initialDate: _selectedDate, firstDate: DateTime(2020), lastDate: DateTime.now(), ).then((pickedDate) { if (pickedDate == null) { return; } setState(() { _selectedDate = pickedDate; }); }); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('Add Transaction'), ), body: Padding( padding: const EdgeInsets.all(16.0), child: Form( key: _formKey, child: Column( children: <Widget>[ TextFormField( decoration: const InputDecoration(labelText: 'Amount'), keyboardType: TextInputType.number, validator: (value) { if (value!.isEmpty) { return 'Please enter an amount'; } return null; }, onSaved: (value) { _amount = double.parse(value!); }, ), DropdownButtonFormField( value: _category, items: ['Food', 'Travel', 'Entertainment'] .map((label) => DropdownMenuItem( value: label, child: Text(label), )) .toList(), onChanged: (value) { setState(() { _category = value as String; }); }, onSaved: (value) { _category = value as String; }, ), Row( children: <Widget>[ Expanded( child: Text( 'Date: ${_selectedDate.toLocal()}'.split(' ')[0], ), ), ElevatedButton( onPressed: _presentDatePicker, child: const Text('Choose Date'), ), ], ), const SizedBox(height: 20), ElevatedButton( onPressed: _submitForm, child: const Text('Add Transaction'), ), ], ), ), ), ); } }
Step 9: Local Storage Setup
Create a file lib/helpers/db_helper.dart to set up SQLite for local storage:
Dart import 'package:sqflite/sqflite.dart'; import 'package:path/path.dart'; class DBHelper { static Future<Database> database() async { final dbPath = await getDatabasesPath(); return openDatabase( join(dbPath, 'transactions.db'), onCreate: (db, version) { return db.execute( 'CREATE TABLE transactions(id TEXT PRIMARY KEY, category TEXT, amount REAL, date TEXT)', ); }, version: 1, ); } static Future<void> insert(String table, Map<String, Object> data) async { final db = await DBHelper.database(); db.insert( table, data, conflictAlgorithm: ConflictAlgorithm.replace, ); } static Future<List<Map<String, dynamic>>> getData(String table) async { final db = await DBHelper.database(); return db.query(table); } } Output:
Congratulations! You have created a simple but operational Finance Tracker Application in Flutter. This app enables users to enter transactions with categories, amounts, and dates and downloads and stores the data with the use of a SQLite database. You can improve it with adding a feature to edit the transaction, filter the data by date, and more useful tools to illustrate the data.
Git Application for the Finance Application : Finance Flutter Application
Of course, do whatever you need to do to develop and grow the app and its capabilities. Happy coding!
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