xUtils3 is an integrated Android toolkit that combines HTTP networking, image loading, ORM database queries, and view injection into a single cohesive library. It provides annotation-driven view binding and event handling, eliminating manual view lookups by scanning Java annotations at runtime through reflection.
The library includes a fluent LINQ-style ORM query builder for constructing type-safe database queries with filtering, grouping, aggregation, and pagination operations. Its HTTP networking layer supports multiple verbs, cookie management, and pluggable response parsing for structured data formats, while the file transfer capabilities enable range-header resume for interrupted downloads and large file uploads exceeding two gigabytes.
Image loading and caching are handled through a multi-level LRU system that stores thumbnails and originals in memory and on disk, with support for circular or rounded cropping. HTTP responses are cached locally by respecting Cache-Control, Last-Modified, and ETag headers with time-and-LRU eviction for stale entries.