Testing of Android Auto on the unit.
Having a complete Android head unit makes it questionable why you would use Android auto. Anyway, I tested it this afternoon.
Edit 25 May 2018: For older models Joying sold a Z-box usb adapter, to be able to use Android Auto from your phone onto the Joying head units. On these PX5 models they deliver an apk, the zlink.apk, that does the same. This means you no longer need an external adapter.
- Install Android Auto on your phone. As Android auto is not yet officially supported in (most countries of) Europe, you won't find it in the Play Store (I live in the Netherlands) so I downloaded it from apkmirror: https://www.apkmirror.com/apk/google-inc/android-auto/.
- Pair your phone via Bluetooth to your head unit (if you hadn't done that already)
- Connect your phone via a USB cable to your unit.
- Start the zlink app on your unit
Android auto, from my phone displayed on my unit, works fine. Android auto is straight-forward and well-thought out with simplicity and safety in mind.
But again: If you have a full functioning Android head unit, why would you need Android auto?
The only big bonus at this moment is that my phone fully supports OK Google which then also works over Android auto. It is so nice to simply say "OK Google", and then "do this, do that" without having to take your hands of the wheel (also because I don't have steering wheel buttons).
My PX5 head unit itself does not support OK Google at all at this moment with this android version/firmware. Also the Google Search voice input (tapping the microphone in the search bar) doesn't work at all. This is currently a big drawback.
In any case: If you want to use Android auto on your Joying, you are fine to go. I use pulsar music player, which supports Android auto, and the the only thing is that my music artwork is displayed at too big size. Probably because my phone's resolution is 1920x1080 and the head unit 1024x600.
(w.r.t. OK Google on the head unit itself: I reported this issue to Joying. I already pushed the latest Google Search (Velvet if you like) to my unit and updated the framework, but no go. It says that it can't connect to the internet. Even with my phone hotspot in the car over 4G+, giving a superstrong signal and giving (relatively) massive upload/download speeds for everything, it complains "I can't connect to the network")