The HarmonyOS Developer Community is a learning-oriented community for developers to learn, communicate, ask questions, and share.
This tutorial demonstrates a full video transcoding workflow on HarmonyOS using the AVTranscoder API, covering instance creation, progress tracking, pause/resume/cancel controls, and playback of the transcoded output, with complete ArkTS code examples.
This article details integrating local LLMs into HarmonyOS apps, covering use cases like narrative generation and offline privacy, real-world benchmarks on Mate 60 Pro with Qwen2.5-0.5B, architecture using ArkTS and llama.cpp, performance optimizations via O3/LTO/KleidiAI, and key pitfalls like token limits and UI threading.
This guide explains how to combine spatialization and multi-device adaptation in HarmonyOS 7, recommending that ordinary apps first refine five core page types — home/workbench, list/detail, edit/form, empty states, and settings — by restructuring information hierarchy, master-detail layouts, confirmation boundaries, and responsive width thresholds before adding visual effects.
This guide introduces DevEcoCli, a unified command-line tool that wraps DevEco Studio's toolchain (ohpm, hvigor, hdc, emulator, hilog) for HarmonyOS app development, covering installation, core commands (create, build, run, emulator, docs, skills), and integration with AI coding agents like Claude Code and Cursor for natural-language-driven workflows.
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.
