I can't install HA app on a car radio with Android

Hello. I have a Junsun brand Android car radio. I want to install the HA client for android, from Google Play, to have a car location sensor in my HA panel. But when I run it for the first time, after indicating the URL of my HA server, it only shows a white screen with the HA logo, without asking me for login, and it stays that way forever.
I have tried reinstalling the app, as well as deleting both the cache and the data storage.
How can I have the application installed, or failing that, a car location sensor that transmits the car’s GPS position to my HA panel?

Any ideas on how to monitor my android car radio? I would like to know the location of the car.

Additionally I would like to be able to install the home assistant app on the radio, but it does not reach the login as explained above.

Same problem here, junsun android unit, whrite screen after url input.

if the car does not have a WebView app installed then indeed the HA logn page will not load. WebVew needs to be installed as a system app and kept up to date in teh play store.