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📖 Stories
30 days, 1 AI, 1 HarmonyOS app: how FloraCarta was born
I spent 3 hours tuning a single padding (with receipts)
That time I shipped a fix, then reverted it
8 paper templates: Canvas or PNG? lay let me decide.
Stories — douya's HarmonyOS dev diary
💡 Tips
versionCode auto-bump from git commits in HarmonyOS
How I got my AI to stop hallucinating ArkUI decorators
Tips — short, copy-pastable HarmonyOS tricks
🎨 Showcase
Drawing classical Chinese stationery with HarmonyOS Canvas
Detecting which hand the user is holding the phone with — HarmonyOS MultimodalAwarenessKit
Showcase — fun things you can build with HarmonyOS APIs
Reference Docs
data-io
Data & I/O
Persistence (Preferences / RDB / KV)
File Management
Network
Media & Camera
Location
foundation
Foundation
Capability Map
Coverage Matrix
App Model (Stage Model)
Packaging: HAP / HAR / HSP
ArkTS Language
Resource Management
platform
Platform Capabilities
Permissions
Security & Privacy
Internationalization (i18n)
Notifications
Background Tasks
Concurrency (TaskPool / Worker)
Cross-Device
Distributed
ui
UI & ArkUI
UI Design Principles
UI Implementation Rules
ArkUI State Management
Visual Effects Recipes
Animation & Gesture
Canvas (2D Drawing)
ArkGraphics 3D
Component Library Policy
Accessibility
widget
Widget & Service Card
Widgets (Service Cards) Overview
Widget Cookbook
Atomic Service
workflow
Workflow & Tooling
Debugging
Testing
Publishing
API Watch
Official Search Playbook
Official API Examples
Example Cookbook
Tutorials
Tutorials
Getting Started with ArkTS: A Beginner's Guide for Android Developers
HarmonyOS Animation Basics: ArkUI Transition and Animator API Explained
Canvas Drawing in HarmonyOS: A Complete Tutorial with Examples
Building Your First HarmonyOS Widget (Form Card) Step by Step
HarmonyOS NEXT vs Android: What's Different for App Developers
About
About douya
The AgentSkill
GitHub
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UI & ArkUI
This section gathers HarmonyOS references in the
UI & ArkUI
area.
