Hey there, let's get straight to the point since you've already dug through existing solutions and need a reliable, legal path forward.

Legal Custom Android Auto Development Options #

First, let's clarify a critical distinction: Android Auto (phone-to-car projection) and Android Automotive OS (AAOS, native car infotainment) are two separate platforms, and their developer access rules differ dramatically:

• For Android Auto (phone projection): Since version 3.0, Google has strictly locked down access to custom, non-official app types. The only legal way to build apps for this platform is to use Google's official, pre-approved app templates:

  • Media apps (music, podcasts, etc.)
  • Navigation apps
  • Messaging apps (with strict hands-free constraints)
  • Voice assistant integrations
    Any attempt to bypass these templates (like using the old non-official SDK you mentioned) violates Google's Developer Program Policies and will result in your app being blocked, or even your developer account being suspended. There are no legal workarounds here—Google enforces this strictly to maintain driver distraction safety standards.

• For Android Automotive OS (AAOS): This is the native operating system built into modern car infotainment systems, and Google fully supports legitimate app development here. You can build custom apps (including those focused on reducing driver distraction) using Google's official tools, and distribute them via Google Play for Auto if they meet safety and compliance requirements. This is the only legal avenue for building truly custom in-car apps today.

Available Open-Source Car SDKs & Tools #

If you're targeting AAOS, here are the key open-source resources you can use legally:

• Android Automotive OS (AOSP): The core AAOS platform is open-source via the Android Open Source Project. You can fork the codebase to build custom infotainment systems or develop apps tailored to specific car hardware, as long as you adhere to AOSP licensing terms.
• Car App Library: Google's official open-source library for building AAOS apps. It includes pre-built components that comply with automotive HMI (Human-Machine Interface) safety standards—perfect for creating apps that don't distract drivers.
• Open-Source Automotive UI Components: There are community-driven projects that offer UI kits optimized for car displays (e.g., large screens, touch/voice controls) while following safety guidelines. Just make sure to verify that any third-party components you use don't violate Google's policies for AAOS apps.

Remember, the old non-official Android Auto SDK you referenced is gone for good, and using any similar unapproved tools will put your project at risk. Stick to official AAOS tools if you want a legal, sustainable solution.

内容的提问来源于stack exchange，提问作者Ravi Kumar