programmerguohuajing / DiPlay-Legacy-Android

# DiPlay Legacy Android
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> This project is modified from shihabal3amri/DiPlay with deep compatibility refactoring.
>
> **Scope difference with upstream**:
> - Upstream DiPlay supports **Android 7.0+ (API 24)** in latest releases, primarily targeting modern 64-bit platforms.
> - This project focuses on **Android 4.4 KitKat (API 19) through Android 6.0**, as well as legacy 32-bit automotive hardware architectures (`armeabi-v7a`, `x86`, Allwinner T3, MediaTek, AC8227L), low-level Linux usbfs driver hardening, and proprietary Bluetooth stacks (e.g., Hangsheng HSAE for Dongfeng Nissan).
>
> Upstream project: https://github.com/shihabal3amri/DiPlay
**CarPlay for compatible BYD and legacy Android head units.** Wired and wireless, with the familiar DiAuto interface. Independent app: `com.shihab.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.
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## 0.2.14 — public preview
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. The APK supports Android 9+ (API 28); wireless supports Wi-Fi Direct, the car’s existing hotspot or Existing Wi-Fi / Same LAN. Android 9 Wi-Fi Direct uses a firmware-dependent legacy path with generated group credentials and unverified requested frequency; see Android 9 Wi-Fi Direct. Android 10+ verifies its negotiated group frequency.
- 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.
- Legacy Android fallbacks for media keys, notification/services, USB configuration and requests, audio/video codecs, multidex and Java library APIs.
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