XPopup is an Android popup UI framework and overlay component library used to build customizable dialogs, bottom sheets, and overlay views. It serves as a dialog engine for creating high-performance popup views and provides a toolkit for executing entrance and exit transitions.
The library is distinguished by its ability to render ultra-long, high-resolution images using memory-efficient loading and drag-to-dismiss interactions. It supports displaying overlay views while an application is in the background through system overlay permissions.
The framework covers anchor-based positioning for dropdown behaviors, gesture-driven dismissal logic, and nested-scroll interaction management. It includes a set of standard components for centered dialogs and side drawers, managed by a lifecycle system that binds popups to host components to prevent memory leaks.