Android Question USB Serial Run Time Permission (USB Serial Permisison Dialog )

[Microinvest]

Since Android 6 was introduced, apps might require various run time(dynamic) permission in order to allow different features. Currently B4A has Run Time permission, which allow app to ask user for run time permission, for example:

rp As RuntimePermissions
rp.CheckAndRequest(rp.PERMISSION_WRITE_EXTERNAL_STORAGE)

We used this dynamic runtime permission, but Today we found out that USB Permission Dialog is not appear in Android 10. And since Usb permission is "called" from usbmanager, not from permission, I can't use runtimepermission library for that purpose (for example rp.hardware.usb.action.USB_DEVICE_ATTACHED is not a valid statement). And I need solution with runtime permission - I already use solutions like this for older Android versions:

USB to Serial Permission

I've got a Prolific USB to Serial device. I've tried the felUsbSerial library and it works with it. I understand that as per many things with Android the user needs to give permission for the app to access it. That is fine when running it the first time. But it seems that after a reboot you...

www.b4x.com

https://www.b4x.com/android/forum/t...e-usb-serial-library.62216/page-2#post-415487 .

We also, already use Usb filter in manifest, but since Android 10 Android USB Permission dialog, is not appearing anymore (we haven't tested Android 9, the dialog works until Android 8.1, and doesn't work with Android 10). Example from Manifest:

AddPermission(android.hardware.usb.action.USB_DEVICE_DETACHED)
AddPermission(android.hardware.usb.action.USB_DEVICE_ATTACHED)

CreateResource(xml, device_filter.xml,
<resources>       
    <usb-device />   
</resources>
)
AddApplicationText(
<activity android:name=".main" >
   <intent-filter>
    <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
   </intent-filter> 
    <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" />  
</activity>
)

Help will be appreciated, please, note it is about Android 10 Runtime permission (usb serial dialog) and NOT permissions, defined in the manifest.

 

[Erel]

USB has nothing to do with the standard runtime permissions.

AddPermission(android.hardware.usb.action.USB_DEVICE_DETACHED)
AddPermission(android.hardware.usb.action.USB_DEVICE_ATTACHED)

This should be removed as these are not permissions.

Nothing has changed in Android 10, related to USB.
The device_filter.xml is not set correctly.

Example:

CreateResource(values, device_filter.xml,
<resources>
<usb-device vendor-id="1921" product-id="21891"/>
<usb-device vendor-id="3468" product-id="316"/>
<usb-device vendor-id="4292" product-id="60000"/>
</resources>
)

 

[Microinvest]

It is set correctly for unknown vendor_id's - it was tested and works in Andorid 4.4.2, 4.4, 5, 6, 7, 8.1 - not tested in 9, and not working on 3 different models under Android 10. I'm also sure in OTG cable and usb device as well (I tested them with older android devices).

As for the filter, the id is not set by purpose, as we don't know in advance what type of connector/adapter and or OTG user will connect (vendor-id will depepend on the particular model). That's why I focused in the first post on the fact that code, manifest and filter are working without any issue.

So if there is no change from Android 10 regarding these matters, how do you think we can define device filter, in case we don't know in advance what are vendor_id's?

As for my run time permission questions, those topics made me to think in this direction:

USB Permissions without prompt

I have 2 activities within my app. Say FirstActivity and SecondActivity. FirstActivity is the MAIN and LAUNCHER activity. SecondActivity uses usb devices. I want the prompt for USB permission to a...

stackoverflow.com

Android App Won't Remember USB Permission

I am trying to stop the app I am working on from asking for USB permissions each time the USB device is disconnected. I have followed: USB device access pop-up suppression? without much luck. The...

stackoverflow.com

Best Regards

 

[Erel]

You cannot use the device filter if you don't know the ids. You should instead use UsbManager.RequestPermission.