Persisting USB permission after reboot without replugging device

Question

In an Android app, I need permission for a specific USB device (known vendor/product ID), which is permanently plugged on the Android device.

So far I've made the following observations:

• when using UsbManager.requestPermission() the permission is dismissed when replugging/rebooting and the popup's checkbox seems to have no effect at all on this behavior
• when using intent filters, the permission is properly re-granted when replugging the USB device (even when replugging after a reboot, if the popup's checkbox was checked) BUT the permission is not re-granted after reboot unless I unplug & replug the USB device.

Is it possible to make sure that the permission popup is displayed only once ? (especially in the scenario when the Android device is rebooted and the USB device remains plugged in)

NB: the app isn't installed in the system folder and therefore cannot use the MANAGE_USB permission.

Answer 1

The solution is to use intent filters and add the android:directBootAware="true" attribute on the associated activity so that the USB_DEVICE_ATTACHED event is correctly received after boot.

Answer 2

Persisting USB Permission is not possible, as the reboot option is stopping everything forcefully generally it makes the USB also unplugged.

There is one possibility to ask for replugging USB on reboot.

Is it possible to make sure that the permission popup is displayed only once? No

Because If your are connecting the usb which makes a deadlock situation for taking care of that they make it unplugged, rather than disturbing the system.

So it is not possible to make it USB Plugged-in.