HarmonyOS Developer Technology

Jun 22, 2026 · Mobile Development

Log4a: Open-Source HarmonyOS Logging Library Boosts Performance & Security

Log4a, an open-source HarmonyOS logging library from One Day Accounting, uses a three-layer architecture with background Worker threads to prevent main-thread blocking, supports encrypted log storage, rolling logs, and server upload, and has been validated across apps with over one million users and ten million downloads.