Android Dashcam Options for Cars and Android Auto

Yes, with suitable software and a legal, secure mount, but continuous power, heat, storage and interruptions need planning. The phone must not obstruct the driver's view.

Android Auto does not turn a connected phone or arbitrary camera into a dash cam by itself. Recording capability comes from dedicated hardware or a separate phone app.

A phone app can be convenient for occasional use. A dedicated camera is designed to remain mounted, start with the vehicle and manage loop recording independently.

Often, yes. Many cameras create a local Wi-Fi link for setup or transfers, although cloud and remote features require an internet connection.