USB Audio on Android 8.0.0 - Android Q&A, Help & Troubleshooting

So, I have an issue with audio out via USB. On android 7, I would plug an USB into the car headunit connecting it to the phone. In android 8, it doesn't recognize the device. The phone keeps disconnecting, shows android accessory connected, then it disconnects again until the HU throws an error
S7 Edge Exynos running Android 8.0.0 ERC6

Up. I've read somewhere that it has something to do with AOA, and that's not supported in Oreo. Is this the case ?

Same problem here. I've managed to get it working by forcing 'Audio Source' option under USB connection settings in Developer Options, but it has to be manually set each time. So if the head unit or connection freezes (which does happen), you have to physically reconnect and start from scratch. Which can't be done safely whilst driving...

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Help USB problem

Just got a Galaxy S3 a few days ago, everything was going fine. Transferring music to my phone from my MacBook Pro using Android File Transfer. Half way through the app stops transferring and I have to force quit on my laptop. Now when I reattach my usb cable I get the following message: "No Android device found Please connect your Android device with a USB cable to get started" My cable is connected, my phone is charging, but the phone is not showing that it is connected (no usb in notifications, can't choose between MTP/PTP...) So I can't continue to transfer my music I restarted both my MacBook Pro and phone. I tried to see if its my phone by connecting to my dock in my car and everything works fine, my Car Home Ultra app opens and works fine. HELP please. How can I get my phone to recognize my cpu via USB? It was working fine, but now nothing other than charging. I read on another thread too toggle USB debugging in developer options, tried both to no avail. Help please, I am an Android noob.

[Q] Android can't see usb and headphones connections

Hello!
When I connect my device (Nexus 7 2013) to PC or charger by USB, android can't see this connection. It shows that baterry don't charges, but in fact it charges. When tablet is off and I connect it to charger it shows charging picture. Android can't see connection to PC too & and PC can't see android device. I can connect it to PC in fastboot mode, but not in adb.
When I tried to connect my headphones to nexus and start to playing music, sound comes from external speakers on nexus, but not on headphones.
There was an issue with random rebooting and very fast eating battery, but I installed other (4.4.3) version of stock android and GO Launcher EX instead of standard launcher. And then comes this new issue described above.
I can flash other rom or restore factory settings, but I'm afraid of old bug with random reboots.
What can you advice to me?

Android Auto USB connection problem ?

Is there anyone success in connecting this phone to a car using "Android Auto" ? I try many roms in the kenzo development section but none of them makes the phone being detected by the car through USB. I had another Mi Note Pro on the CM13 rom and the phone is connected to the car through USB cable.
on my note 2 i have to connect the phone and then activate thhe MTP protocol. it gets deactivated automatically a few seconds later. after that android ajto works perfectly good. maybe this will help you
I know this is an old thread but any solution?

S9+ USB disconnect issue

I am having an issue where my S9+ intermittently disconnects from USB devices. Done the obvious thing of trying multiple USB leads but this does not change anything.
Flying a DJI drone that uses an android app connected via USB to a remote control unit. Maybe one in ten flights the USB feed from the Remote Control to the S9+ gets cut, making flight control problematic.
VW car with inbuilt Android Auto occasionally loses the USB connection and stops functioning.
In both instances no amount of re-plugging the USB C lead or rebooting the phone or android app fixes the issue. However as far as I can tell, in all cases power cycling the connected device, be it the Remote control for the UAV or the the VW radio (Car off for several minutes), immediately fixes the issue.
Does any body have an idea of what would cause the S9+ behave like this. Chopping the USB out of the blue. Seemingly the S9+ no longer recognises the specific device that is in plugged in to it and the associated app UNTIL the peripheral device is power cycled. Could this be the "Optimize Battery Usage" function running amok. Have disabled it for both apps but it is too early to tell if it has fixed it .

Oppo Reno2 Z unable to connect with Android Auto

I have recently purchased an Oppo Reno2 Z. One issue that I am having is with connecting phone Android Auto on my Sony AX-5000 car stereo. Android Auto was working on this car stereo with my previous phone (a Nokia 7 plus) without any issues, so I am confident the problem is with the Oppo phone and not the stereo or usb cables I have used. I also have found the odd post from other Oppo users with the same issue.
When connecting the Oppo Reno2 Z (running ColorOS 6.1) to the stereo, Android Auto does not start up and instead I get the message 'USB device not supported'. I am able to get Android Auto to work by initiating Developer Options on the Oppo and then changing 'Select USB Configuration' from 'Charging' to 'MTP (Media Transfer Protocol)', however this only works for that one time and next time I try to use Android Auto again I am forced to go through the above steps once again. It does not appear that it is possible to permanently change USB Configuration to MTP (Media Transfer Protocol).
Does anyone know of a permanent solution to this issue? I'm hoping that it may be fixed in ColorOS 7, however that is not yet available in Australia for this phone.
Many thanks in advance.

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