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XPay is a Java-based personal payment collection system designed around QR-code payments and order tracking. The open-source repository contains the version 2.0 code and supports payment workflows for services such as Alipay, WeChat, QQ Wallet, and UnionPay-style collection methods. Orders can carry identifiers that help match incoming transfers to individual transactions. Its unsigned personal-payment workflow relies on user review and email-based confirmation instead of continuously monitoring payment apps. ...

This project is a reference e-commerce application that demonstrates how to assemble a complete shopping experience with Flutter. It showcases core retail flows: product discovery and filtering, detailed product pages with images and specs, wishlists/favorites, cart management, and a checkout sequence. The UI mimics production patterns such as persistent navigation, responsive grids, and consistent typography to keep browsing fast and familiar. Under the hood, it illustrates state management...