蓝牙连接欺骗 -- bluetooth 领域 和 bluetooth-audio 领域 android 相关 的问题

I have a Nexus 6 running Nougat. I've always had it connected to my car speakers via Bluetooth. Last night, I hit play on my music app, and although the car's display screen showed the song info and the progress timer, and I was able to navigate through my playlist (i.e. the car thought it was playing), the sound came from the phone.

I thought it was an issue with the car's connection, but then today I tried to connect my bluetooth earbuds, which have worked fine in the past. The phone's bluetooth settings showed that the earbuds were paired, and the buds gave me the little beep tone to indicate pairing, but again, when I hit play, the sound came blasting out the phone speaker, rather than through the earbuds.

I've tried unpairing and setting up from scratch, and that doesn't seem to make a difference. Any ideas?