I'm trying to connect my Android phone to Arduino board with USB Host Sheild in order to let Android to launch my app in accessory mode. Basically, it works perfectly well on older devices as Moto G (2015) - Android 6.0, Nexus 5 - Android 6.0.1 and ancient noname tablet with Android 4.4.2. But I noticed that on Android 7 and above the app doesn't get launched or no prompt accessory dialog is shown, I tried a few Huawei devices, Xiaomi all of them have Android 7 or above.
So, my question, is accessories API still available in Android 7+? Thanks in advance.
UPD. Seems I got pretty firm evidence that Accessory Mode is still available in Android. Basically, I tested my solution against Google Pixel 3XL with Android 10. Works well.
Thus my conclusion is, how well that mode supported is up to a manufacturer. Is there any ideas how enable this mode, maybe by installing custom ROMs or using some unofficial tweaks. Thanks.
Of course it does - but these stock ROM might lack an application to deal with it. The problem rather seems to be that usbremotecontrol.com went down - and the one snapshot available on archive.org looks strange. Just see which application is used on these Android 6.0 devices.