Fintech | Flutter Real Time Finance and Wallet Application UI Kit.

Introduction

Welcome to the Fintech | Flutter Real Time Finance and Wallet Application UI Kit Tutorial! This comprehensive guide will walk you through the step-by-step process of building a real-time finance and wallet application using Flutter and the Fintech UI Kit. By the end of this tutorial, you'll have a fully functional app that allows users to manage their finances, view transactions, and perform real-time transactions.

Before You Begin

To complete this tutorial, you'll need:

1. Familiarity with Flutter development and the Dart programming language.
2. A text editor or IDE (IntelliJ, Android Studio, etc.) to write your code.
3. The Fintech UI Kit downloaded and installed on your machine.
4. A Flutter project set up on your machine.

If you're new to Flutter, you can start with the official Flutter documentation to get started.

Section 1: Setting up the Project

1. Create a new Flutter project by running the command flutter create fintech_wallet_app in your terminal.
2. Open the project in your preferred editor or IDE.
3. Add the Fintech UI Kit to your project by running the command flutter pub add fintech_ui_kit in your terminal.
4. Import the UI Kit into your project by adding the following line to your pubspec.yaml file:

   dependencies:
   fintech_ui_kit: ^1.0.0

5. Run the command flutter pub get to retrieve the UI Kit and add it to your project.

Section 2: Building the App Structure

1. Create a new directory inside your project directory called lib.
2. Inside the lib directory, create a new file called main.dart.
3. Open the main.dart file and define the app's main widget:

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

void main() { runApp(MyApp()); }

class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Fintech Wallet App', theme: ThemeData( primarySwatch: Colors.blue, ), home: SplashPage(), ); } }

4. Create a new directory inside the `lib` directory called `pages`.
5. Inside the `pages` directory, create a new file called `splash.dart`.
6. Open the `splash.dart` file and define the splash screen widget:

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

class SplashPage extends StatefulWidget { @override _SplashPageState createState() => _SplashPageState(); }

class _SplashPageState extends State { @override void initState() { super.initState(); Future.delayed(Duration(seconds: 2), () { Navigator.pushReplacement( context, MaterialPageRoute(builder: (context) => HomePage()), ); }); }

@override Widget build(BuildContext context) { return Scaffold( body: Center( child: FintechCircularProgressIndicator(), ), ); } }

7. Repeat steps 4-6 to create the `HomePage` widget.

**Section 3: Implementing the UI Kit**

1. Open the `home.dart` file and replace the existing code with the following:

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

class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState(); }

class _HomePageState extends State { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Fintech Wallet App'), ), body: Padding( padding: const EdgeInsets.all(20.0), child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ FintechCard( title: 'Account Balance', value: '₹ 10,000.00', ), SizedBox(height: 20), FintechCard( title: 'Transaction History', value: 'View All', ), SizedBox(height: 20), FintechButton( child: Text('Deposit'), onPressed: () { // Implement deposit functionality }, ), ], ), ), ); } }

2. Add the FintechCard and FintechButton widgets to your app using the following code:

import 'package:fintech_ui_kit/fintech_ui_kit.dart';

class HomeScreen extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Home Screen'), ), body: Padding( padding: const EdgeInsets.all(20.0), child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ FintechCard( title: 'Account Balance', value: '₹ 10,000.00', ), SizedBox(height: 20), FintechCard( title: 'Transaction History', value: 'View All', ), SizedBox(height: 20), FintechButton( child: Text('Deposit'), onPressed: () { // Implement deposit functionality }, ), ], ), ), ); } }

**Section 4: Implementing Business Logic**

1. Add the following code to implement the deposit functionality:

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

class DepositScreen extends StatefulWidget { @override _DepositScreenState createState() => _DepositScreenState(); }

class _DepositScreenState extends State { final TextEditingController _amountController = TextEditingController(); final FintechValidator _validator = FintechValidator();

@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Deposit'), ), body: Padding( padding: const EdgeInsets.all(20.0), child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ FintechText( 'Enter Amount:', style: TextStyle(fontSize: 16), ), SizedBox(height: 10), FintechTextField( controller: _amountController, validator: (value) { if (value.isEmpty) { return 'Please enter an amount'; } else if (double.tryParse(value) == null) { return 'Invalid amount'; } else if (double.parse(value) <= 0) { return 'Amount must be greater than 0'; } else { return null; } }, ), SizedBox(height: 20), FintechButton( child: Text('Deposit'), onPressed: () { if (_validator.validate(_amountController.text)) { // Implement deposit logic here } else { ScaffoldMessenger.of(context).showSnackBar( SnackBar( content: Text('Invalid amount'), ), ); } }, ), ], ), ), ); } }

2. Add the following code to implement the transaction history functionality:

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

class TransactionHistoryScreen extends StatefulWidget { @override _TransactionHistoryScreenState createState() => _TransactionHistoryScreenState(); }

class _TransactionHistoryScreenState extends State { List _transactions = [];

@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Transaction History'), ), body: Padding( padding: const EdgeInsets.all(20.0), child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ _transactions.isEmpty ? FintechText('No transactions found') : ListView.builder( shrinkWrap: true, itemCount: _transactions.length, itemBuilder: (context, index) { return ListTile( title: Text(_transactions[index].description), subtitle: Text('₹ ${_transactions[index].amount}'), ); }, ), ], ), ), ); } }

class Transaction { String description; double amount;

Transaction({this.description, this.amount}); }

3. Add the following code to implement the account balance functionality:

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

class AccountBalanceScreen extends StatefulWidget { @override _AccountBalanceScreenState createState() => _AccountBalanceScreenState(); }

class _AccountBalanceScreenState extends State { double _balance = 10000.0;

@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Account Balance'), ), body: Padding( padding: const EdgeInsets.all(20.0), child: FintechCard( title: 'Account Balance', value: '₹ $_balance', ), ), ); } }

**Conclusion**

You've successfully completed the tutorial on building a real-time finance and wallet application using Flutter and the Fintech UI Kit. This application allows users to manage their finances, view transactions, and perform real-time transactions. You can customize and extend this application to meet your specific requirements.

Note: This tutorial is intended to provide a basic example of how to use the Fintech UI Kit. You will need to implement additional functionality and features to create a fully functional app.