Cashier App - Flutter with API Integration

Overview

A point-of-sale (POS) application built with Flutter using GetX for state management and MVVM architecture pattern. Features barcode scanning, offline capabilities, and integrated payment processing.

Features

Authentication & Setup

• 🔑 Username/password login (initial setup)
• 🏪 Store ID retrieval and storage (SharedPreferences)
• 📱 Device binding (owner-only via userID + appKey)

Product Management

• 🌐 API product sync on first login
• 💾 Local SQLite database storage (sqflite)
• 🔍 Product lookup by:
  • 📷 Barcode scanning
  • ⌨️ Manual barcode entry

Order Processing

• 🛒 Cart functionality with quantity adjustment
• 💰 Integrated payment methods:
  • Alipay API integration
  • WeChat Pay API integration
• 📄 Order history tracking

Technical Stack

• Framework: Flutter
• Architecture: MVVM Pattern
• State Management: GetX
• Local DB: SQLite (sqflite)
• API: RESTful integration
• Security: SharedPreferences for secure storage

Installation

git clone http://git.sixqin.com:3000/Bilal/CashierApp.git
flutter clean
flutter pub get