This app, called HeadUnit Reloaded (HUR), allows users to connect their Android devices to their car's head unit in three different ways: USB mode, WiFi, and self mode. In USB mode, users simply plug in a USB cable (or an OTG cable for tablets) and allow HUR to be the default app for the action. For devices with Android 7.0 or higher, users may need to select the connected USB device from the notification bar before the app starts. In WiFi mode, users must first install the WiFi Launcher app on their phone and select their car's Bluetooth. Then, they can enable the hotspot option and connect their car's unit to the phone's hotspot. Finally, they can open HUR and the app will start automatically. In self mode, users can use HUR and Android Auto on the same device by pressing the "Self-mode" button in HUR (as long as Android Auto is also installed on the device).
If users encounter any issues while using the app, there is a FAQ and troubleshooting section available on the XDA Developers forum. This includes information on how to enable video playback during driving on Android powered headunits, as well as how to change HUR settings and enable software decoding. The app is compatible with various head units, including Joying, Eonon, Grom Vline, Xtrons, PX5 and PX3 units, A-Sure, RK3188 units, RK3066 units, Avin, and others.
The original idea for this app was developed by the late Michael Read. If users have any difficulties using the app or need support, they can contact the developer. Overall, this app provides a convenient and versatile way for users to connect their Android devices to their car's head unit, making it easier to access and control their phone while driving.