The HarmonyOS Developer Community is a learning-oriented community for developers to learn, communicate, ask questions, and share.
This article implements four timer scenarios — countdown, stopwatch, Pomodoro, and alarm — in HarmonyOS ArkUI, explaining design choices like setInterval vs Date.now() for precision, state machines for phase transitions, and lifecycle cleanup to avoid memory leaks.
This article explores floating-point precision issues in HarmonyOS development, demonstrating how float's 7-digit limit corrupts sensor data, why double increases memory 30% and fails in Native calls, and why BigDecimal kills real-time performance, concluding with a scenario-based selection strategy and validation mechanism.
This article demonstrates how to integrate HarmonyOS Media Library Kit's Moving Photo capability into a real app, covering selection, import, sandbox storage, data modeling, and playback with MovingPhotoView using the Time Travel Journal app as a case study.
HarmonyOS 7 introduces DevEco Code, an AI agent that plans and generates code, and DevEco CLI, which executes build, deploy, and test commands, together enabling a goal-oriented development loop with knowledge bases and reusable Skills for verified app delivery.
TianQu is a pure Kotlin, coroutine-driven routing framework for Kotlin Multiplatform/Compose Multiplatform that supports HarmonyOS, Android, and iOS, featuring compile-time KSP scanning, type-safe navigation, cross-module service discovery, ViewModel lifecycle binding, concurrent preloading, and dynamic feature loading.
HarmonyOS 7 launches as a fully self-developed OS removing Android compatibility, delivering 40% faster system response, 35% quicker app cold starts, 30% less memory use, on-device AI with 98% offline voice accuracy, and distributed collaboration across 16 devices at 8ms latency.
This article details a HarmonyOS network request library encapsulation featuring global configuration, chainable API, request/response interceptors, and support for JSON, form, binary, and multipart file uploads, with complete implementation code, usage examples, and pitfalls like ArkTS type constraints and large-file memory limits.
This tutorial demonstrates building a skateboard trick tracking app on HarmonyOS, covering trick library design, practice session storage using the Preferences API, combo management, statistical analytics, and key implementation pitfalls like data migration and async handling.
This guide demonstrates seven bytecode instrumentation scenarios using HarmonyOS AbcKitTS, including lifecycle tracking, function timing, privacy API monitoring, method replacement, attribute modification, click tracking, and parameter validation, with code examples and Hvigor plugin integration.
This article details building a dynamic HarmonyOS service card that shows real-time cooking progress on the desktop, using FormExtensionAbility in API 23 with a main-process push architecture and Preferences-based cross-process data bridge to overcome process isolation.
