DUDU-Meng Apologies for my ignorance; I was not aware that I needed to manually select the BT Music option to play music from my phone via Bluetooth... Apparently you have opted for a different implementation of BT audio in DUDU OS compared to the normal Android, where music is playing without having to select or enable an application. Music is playing correctly through bluetooth, and the information about the song title is displayed. However, the album/song picture thumbnail is not always displayed... It is very inconsistent... I don't know why. Other times it is not displayed at all; other times it is displayed in the music tab but not in the full-screen window... It needs improvement for sure...
In general the Bluetooth implementation also causes problems with my OBD adapter connection... Maybe you need to use the stock Android Bluetooth connectivity wizard... My OBD can connect through the original Android Bluetooth settings but not through the DUDU OS Bluetooth wizard; it is not even detected in DUDU OS Bluetooth wizard. Then if it disconnects, it has big trouble connecting again, even using the original Android settings menu... Apparently there is a layer that you have implemented in DUDU OS on top of/in parallel with the original Bluetooth connectivity wizard of Android... It works for some devices, but others have big problems connecting...