简体中文说明见 README.zh-CN.md。本仓库基于上游 DiPlay v0.2.10。

CarPlay for compatible BYD Android head units. Wired and wireless, with the familiar DiAuto interface. Independent app: com.shihab.diplay.cn; installs alongside official DiPlay.

BYD support scope: These projects focus on BYD cars. They may work on other brands, but other brands are unsupported and there are no plans to add support or fix brand-specific incompatibilities.

Download CN 0.2.10 · CN optimization log · All CN releases · Upstream DiPlay

Every CN change is written down in the CN optimization log — each release, what changed and why. Current base: upstream v0.2.10.

• Four dashboard modes: map only, official turn card only, map + official glass card, and map + a movable custom turn card (2 % steps, left/right and up/down; shows on straight-ahead too).
• Simplified Chinese by default when the car's language is unsupported; the wireless handoff watchdog steps aside once AirPlay is already active.
• Release APK built as a release variant with the official identity, sized like the official package.

Install on the car, not the iPhone. No jailbreak, dongle, Mac, account or authentication server is required for use. Core CarPlay does not require ADB; optional dashboard, battery, wheel-speed and parked-video features do. Your head unit must permit APK installation. Wireless supports Wi-Fi Direct or the car’s existing hotspot; Wi-Fi Direct requires Android 10+; the APK supports Android 9+ for wired use.

• Wired USB and wireless CarPlay with local authentication.
• BYD HUD navigation with arrows, distance and street names on verified firmware.
• Car hotspot support, improved audio buffering and saved receive diagnostics.
• Automatic address discovery, fixed-channel Wi-Fi fallbacks and successful-configuration memory.
• Icon/text size, resolution and frame rate; applying a display change reconnects CarPlay.
• Local diagnostic export. Reports are sent only if you choose to share them.
• Separate installation alongside DiAuto. Run one projection app at a time.

This is not an Apple-certified product. The APK bundles an experimental accessory identity recovered from public Carlinkit firmware, not a newly provisioned MFi identity for DiPlay. A bundled private key is extractable. Acceptance after future iOS updates, reliability across head units and suitability of that identity for general distribution are unresolved. This release invites community testing; it is not a guarantee of universal compatibility.

Earlier releases were tested on the development DiLink5.1 car: live windshield guidance and street names work, Car hotspot now starts CarPlay, and Wi-Fi Direct performance is substantially improved. Occasional audio cutouts remain and are deferred to a later update. The floating-map test build was installed on the development DiLink 5.1 car; feedback led to the pinch corrections in 0.2.9. Earlier wheel-speed and video contributions were tested on a BYD Tang with DiLink 5.0 and an iPhone 15 Pro on iOS 27; wheel-speed dead reckoning in tunnels remains unverified. Broader head-unit and iOS compatibility is not guaranteed. The HUD firmware scope and cleanup limits are documented in BYD navigation.

• CarPlay song metadata, playback position and album artwork for compatible Android launchers and media displays.
• Available-port selection when another service occupies AirPlay port 7000, with the selected port advertised to the iPhone.
• Targeted USBMUX padding handling that preserves complete following frames, and USB startup without completed wireless-hotspot settings.
• Wi-Fi Direct compatibility for unknown reported security types, bounded busy-channel retries and 5 GHz to 2.4 GHz fallback.
• Available Android echo cancellation and noise suppression during CarPlay calls, with previous audio mode restored afterward.
• BYD CAN/CANFD battery-protocol detection and a saved show/hide setting for the home-screen dashboard-map mirror.
• Optional video while in P uses a new player with seeking and ten-second skip controls. URL validation and redirects protect local Android resources; protected video remains unsupported.
• More Ukrainian translations and bounded Bluetooth, USB restart, boot and microphone diagnostics in exported reports.

Optional video requires network ADB and a valid parked-gear reading. Battery, dashboard and call effects depend on firmware and Android support. See 0.2.10 release notes for all ten contributions, regression fixes and validation limits. Existing device-specific wireless loss, microphone and reconnect reports still need hardware testing.

• Install and connect
• Compatibility and troubleshooting
• Privacy and diagnostic reports
• Build from source
• Validation
• Release notes
• CN optimization log
• Credits and licenses

The website is available in English, Arabic, Russian, Ukrainian, Spanish and Simplified Chinese. The app interface supports those same six languages. Choose the app language in Settings; on Android 13+, it stays synchronized with Android’s per-app language setting.

Based on xcertplay, GPL-3.0. The home/settings UI and website adapt DiAuto, AGPL-3.0; that license is included in docs/licenses. Preserve those notices when distributing modifications. CarPlay and its icon belong to Apple Inc.; no Apple or BYD affiliation or endorsement is implied.

This repository starts with a clean public source snapshot. Local research, tester reports and release-signing secrets are excluded. The complete source corresponding to the APK is provided with every release; experimental runtime identity assets are described separately in the build instructions and notices.

The release APK intentionally contains the experimental accessory identity. The Git repository and source archive exclude all accessory and Android signing keys; tests generate synthetic identities at runtime. Source/CI builds omit runtime identity assets by default. Local release builds explicitly select an external asset directory. Publishing the APK makes its bundled identity extractable; building locally does not preserve that identity's confidentiality.