harmonyos-development

name harmonyos-development description Use when developing, reviewing, debugging, or migrating HarmonyOS NEXT native apps with ArkTS, ArkUI, DevEco Studio, DevEco Code, DevEco CLI, Agent Framework Kit, Stage model, UIAbility, .ets, module.json5, oh-package.json5, HAP/HSP/HAR, API 22-24, API 26 Beta1, HarmonyOS 6.1, HarmonyOS 6.1.1 Release, HarmonyOS 7 preview, HarmonyOS 26.0.0 Beta1, state management decorators, Navigation/NavPathStack, ArkTS concurrency, permissions, persistence, networking, media, Camera Kit, Scan Kit, Map Kit, Push Kit, Payment Kit, App Linking, Share Kit, Weather Service Kit, ArkGuard, APIAVAILABLE, ContainerReader, jsLeakWatcher, Linux CI, testing, performance, or common 鸿蒙开发 workflows. HarmonyOS (鸿蒙) Development Covers HarmonyOS 6.1 (API 23, stable) / 6.1.1 (API 24, Release) / HarmonyOS 7 developer preview (API 26 Beta1) / NEXT native app development — the Huawei mobile OS family that runs independently of Android (AOSP-free since HarmonyOS NEXT, released 2024). Primary language is ArkTS (a strict, statically-checked superset of TypeScript) and the primary UI framework is ArkUI (declarative, state-driven). Use API 24 Release as the default production baseline; use API 26 Beta1 only for preview, adaptation, and early compatibility work. Platform snapshot Item Value OS HarmonyOS 6.1 (stable, released 2026/04/20, API 23). HarmonyOS 6.1.1 (Release, released 2026/05/26, API 24). HarmonyOS 7 / 26.0.0 Beta1 (developer preview, released 2026/06/12, API 26). Pure HarmonyOS, AOSP-free Language ArkTS (primary), Cangjie (beta), C/C++ via NAPI UI framework ArkUI declarative (ArkUI-X for cross-platform) Compiler ArkCompiler — AOT to native machine code; LiteActor concurrency Package manager ohpm — oh-package.json5 ; registry at DevEco Service (OHPM Central) IDE DevEco Studio 6.1.1 Release (6.1.1.280; API 24 production). DevEco Studio 26.0.0 Beta1 (26.0.0.461; API 26 preview) App model Stage model (FA model is legacy — don't use in new apps) Packaging HAP (entry/feature), HSP (shared package), HAR (static archive), atomic .app Recommended API Use API 24 Release for production. Use API 26 Beta1 only for HarmonyOS 7 preview/adaptation. Sample catalog https://developer.huawei.com/consumer/cn/samples/ Release timeline (recent): HarmonyOS 6.0.1(21) — 2025/11/25 (initial stable with Mate 80 series) HarmonyOS 6.0.2(22) — 2026/01/23 (incremental update) HarmonyOS 6.0.0.328 Pollen Beta(23) — 2026/02/28 (closed beta, 25 models) HarmonyOS 6.1(23) — 2026/04/20 (stable general release) HarmonyOS 6.1.1(24) Beta 1 — 2026/04/30 (developer beta) HarmonyOS 6.1.1(24) Release — 2026/05/26 (API 24 Release; DevEco Studio 6.1.1.280) HarmonyOS 7 / 26.0.0 Beta1 — 2026/06/12 (API 26 developer preview; DevEco Studio 26.0.0.461) What's new in API 23 (HarmonyOS 6.1) ArkUI enhancements: Navigation supports binding the routing stack to the component itself and specifying a NavDestination as the navigation bar (home page) — no more separate root container needed Menu adds anchorPosition property: control popup position relative to upper-left of anchor with horizontal/vertical offsets Image component improved SVG parsing capabilities Batch of new C APIs for attribute styles (Native side) New C-side capabilities (Native/NAPI): UDMF (Unified Data Management Framework) C APIs Component drag-and-drop C APIs Cryptographic algorithm C APIs Data: relationalStore enhanced sendable function — better cross-thread data passing Graphics & AI: AI super frame feature in Graphics Accelerate Kit (frame interpolation for smoother animations) ArkWeb: further capability enhancements (intercept/cookies) What's new in API 24 (HarmonyOS 6.1.1 Release) Version baseline: API 24 is now a Release SDK (not only Beta). Use DevEco Studio 6.1.1 Release (6.1.1.280), HarmonyOS SDK 6.1.1 Release, Hvigor 6.24.2, ohpm 6.1.2.268, and Node.js 18.20.1 for API 24 projects. Release additions over Beta1: Ability Kit — AbilityStage adds callbacks before the first Ability is created and when a process starts from an application snapshot. ArkTS — adds enableLocalHandleDetection to keep EventHandler/libuv tasks inside the intended scope and avoid leaks; XML parsing adds XmlSAXHandler callbacks for SAX-style parsing. ArkWeb — download completion callbacks can retrieve the original URL and referrer URL. Call Service Kit — enterprise call service lookup for incoming/outgoing phone numbers. Camera Kit professional controls — flash-state event subscribe/unsubscribe; OIS query/set; lens focal length/equivalent focal length/min focus distance/distortion/intrinsic calibration/sensor size/pixel array/color-filter data; logical camera composition; auto/manual exposure; manual focus; ISO; physical aperture. CANN Kit — large-language-model inference acceleration APIs on PC devices. MDM Kit — manage hidden settings entries for the current user. Beta1 additions still relevant in API 24 Release: Camera Kit "Follow the Person" — automatic camera tracking API that keeps a person centered in frame via real-time crop/zoom. Useful for video calls, workout recording, vlogging: // Conceptual API — full signature in official docs cameraSession. enableSubjectTracking (camera. TrackingMode . PERSON ); Delayed preview output — add delayed preview directly to the stream pipeline instead of normal preview output, and configure its Surface separately. ArkTS VM diagnostics — heap information per VM thread, heap-warning callbacks after GC, and taskpool.execute() timeout settings. ArkUI — parallel-window state query, custom component migration across Ability instances, dynamic layout container, root node lookup for UIContext , async drag-drop decisions, onNeedSoftkeyboard , Canvas/OffscreenCanvas antialias , Tabs nested scrolling, multiline ellipsis modes ( MULTILINE_START , MULTILINE_CENTER ). ArkWeb — User-Agent Client Hints, default context-menu switch, URL whitelist and load/jump security controls. Audio Kit — independent audio session strategy/behavior for capture/rendering, plus OH_MIDI C APIs for USB/BLE MIDI devices. New/expanded Kits — Content Embed Kit, Enterprise Threat Protection Kit, FAST Kit, NearLink Kit, Network Boost Kit, Screen Time Guard Kit, Device Security Kit, Desktop Extension Kit. DevEco Studio — API 24 projects, Hot Reload for C++ and resource edits, expanded AppFreeze parsing, ComMemory UI memory analysis, strictCheckerOnly for faster strict syntax checks. HarmonyOS 7 / API 26 Beta1 preview (2026/06/12) Status (checked 2026/07/25): developer Beta, not the default production baseline. Huawei has not published API 26 Beta2, RC, or Release. Mention API 26 features only when the user asks about HarmonyOS 7, API 26, HDC 2026, preview adaptation, or Beta1 capabilities. For production code, prefer API 24 Release unless the project explicitly targets API 26 preview. Developer kit baseline: HarmonyOS SDK 26.0.0 Beta1 (OpenHarmony SDK Ohos_sdk_public 26.0.0.23 , API Version 26.0.0 Beta1) and DevEco Studio 26.0.0 Beta1 (26.0.0.461) . Toolchain: HarmonyOS Emulator 26.0.0.200 , Hvigor/hvigorw 6.26.1 , ohpm 26.0.0.410 , Node.js 24.14.1 , hstack 6.0.0 , compileSdkVersion: "26.0.0" , targetSdkVersion: "4.0.0(10)~26.0.0" . Version-number rule: Starting with API 26.0.0 , HarmonyOS developer kit API versions use SemVer ( X.Y.Z ) instead of the legacy X.Y.Z(N) format. X means a major version with substantial capabilities or adaptation-impacting changes, Y means a minor version with new capabilities, and Z means compatible fixes/small improvements. High-value API 26 Beta1 changes: Ability Kit — AgentCard support; ArkTS script-based app Skill development; package-name + clone-index app name lookup; ArkTS APIs for script management; C APIs for ModularObjectExtensionAbility . Accessibility Kit — system care mode integration for elder-friendly app experiences. Accessory Kit — new Kit for accessory wake-up, system service linkage, on-demand scheduling, and secure trust management. Account Kit — LoginWithHuaweiIDButton supports custom multilingual text and loading animation. AR Engine — C API camera flash control; ArkTS preview stream image access; 3D Gaussian model loading; ArkTS/C APIs for external camera and sensor data. ArkUI / UI Design — system material configuration for Toggle, Tips, Toast, dialogs, menus, popups, custom dialogs, half modals, and Popup; component-level immersive light perception; global reuse pools for @Reusable / @ReusableV2 ; standard floating windows; title-area customization updates. ArkWeb — Chromium kernel upgraded from 132 to 144; new security configuration options. AVCodec Kit — H.265 hardware encoder CBRHQ mode; Audio Vivid encoding and C APIs. AVSession Kit — new extra-key enum values for scenario-specific AVSession metadata. Background Tasks Kit — reminder countdown instances add repeatInterval and repeatCount . Core File Kit — UNCACHE open option, recursive listFileExt , mmap-based file mapping, and sharing an app sandbox directory as system-visible. Core Vision Kit — image super-resolution and semantic text search over images. Data Augmentation Kit — mail intelligence handler for classification, summarization, and todo extraction. Device Security Kit — enhanced Star Shield confidential risk-control engine, unified risk-control credentials, privacy policy controls for camera/microphone/location, and file-event subscription/filtering. Driver Development Kit — query external USB hubs and develop user-mode drivers. Enterprise Data Guard Kit — file classification policy APIs getPolicy and isKia . Enterprise Space Kit — query dual-space state and determine whether the workspace is enterprise space. FAST Kit — real-number FFT and inverse FFT; intelligent sequence prediction. Graphics Accelerate Kit — game prelaunch feature to improve startup experience. Image Kit — metadata classes for GIF/JFIF/TIFF/PNG/AVIS plus XMP metadata. Input Kit — keyboard and mouse input event injection. Live View Kit — auxiliary-area template with percentage progress ring. NDK / JSVM — create ArrayBuffer from external memory. NearLink Kit — startScan scans all discoverable nearby NearLink devices. Network Boost Kit — netBoost.setDataFlowDesc sets flow descriptions from five-tuple data. Notification Kit — stronger notification management/display, including half-modal notification settings entry. Online Authentication Kit — DID (Decentralized Identifier) key generation, credential import/query/delete, and data signing. PDF Kit — convert specified regions across multiple pages into one image. Performance Analysis Kit — gray release fault-log collection and HiAppEvent app-freeze warning subscriptions. Preview Kit — file acceleration scanning, preload strategy customization, availability query, and file-operation event reporting. Push Kit — Live View push messages support Wearable devices. Remote Communication Kit — HttpVersionSelectCallback for HTTP version selection, HMS_Rcp_SetRequestGetDataCallback() for streaming upload, HMS_Rcp_SetFormOrder() for ordered forms, and QUIC C API. Scenario Fusion Kit — scenario sharing Button supports image, video, and text. Share Kit — phone-to-PC/2in1/tablet tap sharing can expose tap position on the receiving side. Spatial Recon Kit — 3DGS gaussian editing and spatial photo generation from a single photo. Scan Kit — query support for default/custom scan UI on the current device. API 26 behavior and UX changes to watch during adaptation: Ability Kit — public package-change common events ( COMMON_EVENT_PACKAGE_ADDED , REMOVED , CHANGED , CACHE_CLEARED ) add controls for In-House apps when targetSdkVersion >= 26.0.0 ; In-House apps must configure allowListenBundleChangedEvent in app.json5 for third-party listeners. ArkTS / JSVM — Chromium/V8 core upgrades 132 → 144; async function type detection is fixed; Wasm jitless default behavior changes; fastConvertToJSObject now preserves sibling text nodes when parsing XML. ArkUI — NodeAdapter.onAttachToNode , mouse rawDeltaX/rawDeltaY , LayoutPolicy.matchParent , EmbeddedComponent focus, WithTheme , queryNavDestinationInfo / onResult on the home NavDestination , NODE_SWIPER_EVENT_ON_CONTENT_DID_SCROLL , and shadow blur radius behavior have adaptation-impacting changes. Permissions — ohos.permission.READ_IMAGEVIDEO , getUidRxBytes , getUidTxBytes , and general permission policy behavior change under API 26 rules. UX — form controls minimum touch target changes from 28vp to 32vp for Button/Button-style Toggle/Select/Chip/ChipGroup; built-in text line breaking and small-language line height are optimized; Dialog, Toast, AlphabetIndexer, and text selection menu enable immersive system material by default. Disable globally with metadata name ohos.arkui.UIMaterial.state value disable , or per component with uiMaterial.Material.empty . API 26 V2 behavior-scope notes (official docs updated 2026/06/17): Always effective: JSVM/Chromium 132 → 144, async function type detection, fastConvertToJSObject sibling-text preservation, ArkUI rawDeltaX/rawDeltaY , Stage-only ArkUI API constraints, home NavDestination queryNavDestinationInfo / onResult , @ReusableV2 dynamic reuse identifiers, ArkWeb Chromium 132 → 144, READ_IMAGEVIDEO permission behavior, and notofonts small-language font updates. Effective only when targetSdkVersion >= 26.0.0 : In-House package-change event controls, JSVM Wasm jitless default behavior, NodeAdapter.onAttachToNode , attributed-string paragraph style with leading CustomSpan / ImageAttachment , LayoutPolicy.matchParent , EmbeddedComponent focus, WithTheme , NODE_SWIPER_EVENT_ON_CONTENT_DID_SCROLL , component shadow blur radius, getUidRxBytes / getUidTxBytes , permission policy changes, 32vp form-control touch targets, built-in text style optimization, immersive material defaults, and half-modal centered dialog max height. DevEco Studio 26.0.0 Beta1 additions: AI coding: custom Agent token usage display, conversation rollback, project Q&A with MCP Market tools / LSP tools / ArkTS and C++ semantic code search, built-in Inline Chat commands such as File Comments and Parameter Validation, UI Verification tool, and custom Commands. Editing/debugging: API 26.0.0 projects, Load/Unload Modules, ArkUI state-variable relation viewer, Code Scanner resource-leak checks, custom Clang-Tidy, ACL permission requests, 8-breakpoint preview, Car multi-screen emulator, scenario simulation, remote emulator control, Native debug startup acceleration, device projection, SQL-highlight database debugging, dump-file stack parsing, HiLog tag filtering, AppAnalyzer report diagnosis, and diagnostics for OOM/app-freeze/resource leaks. Performance analysis: Memory lane adds ArkWeb PA and JS Heap sub-lanes for Malloc allocation and ArkWeb Render-process JS heap usage, plus a Statistics tab for VMA counts and PSS memory min/max/average. Build/release: apiCompatibilityCheck , tsImportSoCheck , module nativeLib.enableSoDirCollection , syncNative , Hvigor getAllDependencyInfo , AppGallery package re-signing, Linux emulator support, and ohpmrc auto_skip_install , metadata_cache_effective , metadata_cache , plus exact-version metadata queries. Compatibility changes: DevEco Studio and Command Line Tools upgrade Node.js from 18 to 24 ; custom Hvigor/ohpm/ohpm-repo plugins need Node.js 24 adaptation. ohpm-repo 5.5.1 no longer depends on node-fetch ; plugins that relied on that bundled dependency must replace it or install node-fetch@2.7.0 themselves. DevEco Testing 26.0.0 Beta1: Stability testing can target specified entry points to trigger stability issues and expands memory-leak detection coverage. UX testing supports multi-device layout comparison across straight-screen and foldable devices. Test-service matrix includes local app listing precheck, performance baseline/monitoring, stability baseline, memory-leak testing, UX baseline and multi-device layout comparison, security baseline, power baseline, functional-experience baseline, exploratory testing, regression testing, device projection, UIViewer, app graph management, performance report auto-analysis, and report comparison. HarmonyOS AI development tools and capability highlights (officially surfaced 2026/06): DevEco Code — a HarmonyOS-focused AI coding Agent for planning, code generation, build/run, device logs, UI verification, ArkTS checking, knowledge lookup, debugging, and iterative repair. It complements DevEco Studio rather than replacing the SDK/toolchain. DevEco CLI — Agent-friendly command-line access to project creation, syntax checks, build, device run/debug, and other HarmonyOS engineering actions; use it for third-party coding Agents, automation, and CI/CD integration. CodeGenie — the DevEco Studio AI assistant/plugin remains a separate product surface. Huawei lists CodeGenie 6.1.1 Release, Command Line Tools 6.1.1 Release, and DevEco Studio 6.1.1 Release for the production toolchain; the API 26 toolchain remains Beta1. Agent Framework Kit — launches a combination of system Agents from an app through UI controls. Keep it distinct from Intents Kit (declaring app intents), ArkTS script-based app Skills (exposing app capabilities), and device-side A2A (Agent-to-Agent communication). HarmonyOS 7 experience areas — spatial-audio processing nodes, app/game quick start, cold-start network preconnection, QUIC and weak-network live-stream optimization, and LTPO variable frame rate are highlighted platform capabilities; confirm the installed API 26 SDK and device support before presenting them as generally available APIs. API 26 cloud debugging — AGC remote-device cloud debugging can filter devices by API 26 or system version 7.0.0.23 for early compatibility validation. For tool selection, capability boundaries, and answer rules, read references/ai-development-tools.md . Official documentation updates (2026/06/12) Huawei's release docs did not add a newer SDK after 26.0.0 Beta1, but the documentation change log added several developer-facing guides worth surfacing in answers: Ability Kit app lifecycle — new guides cover full app lifecycle state changes, startup configuration such as window mode and start page path, quick-start launch, user/app/system exits, and active/passive restart flows. Ark Intelligence Development Framework — new guides cover the framework overview, Intent Framework development, ArkTS script-based app Skill development, and device-side A2A framework development for exposing app capabilities to system agents such as Xiaoyi. Window management — 20+ development scenarios were reorganized and expanded, including window type, mode, layout, focus, and a new guide for locating common window logs/issues with hidumper . ArkTS Sendable practice — new Sendable migration/practice guide demonstrates using TurboTransJSON to operate on Sendable objects in ArkTS. FA model docs moved — FA model is no longer the recommended app model except mainly for lightweight smart wearables; general HarmonyOS app docs now retain Stage model content, while FA model guidance moved under lightweight wearable app development basics. Official documentation updates (2026/07) No newer HarmonyOS 7 SDK was published, but several official guides now affect implementation and review answers: Native C API compatibility — SDK API 22+ can use weak references with APIAVAILABLE for APIs newer than compatibleSdkVersion . Correct link dependencies, weak-library configuration for libraries absent on old devices, runtime fallbacks, and tests on both the oldest compatible device and the new-API device are mandatory. Compilation alone is insufficient because a missing dependency can fail only at runtime. Read references/native-api-compatibility.md . Linux CI pipeline — use JDK 17 and the matching Command Line Tools, prefer their bundled Node.js, install project/module dependencies, run Hvigor with --no-daemon , protect signing secrets, install signed HAPs with HDC, and enable caseSensitiveCheck to expose filename/import mismatches hidden by Windows or macOS. Read references/build-sign-release.md .