Android Question UsbManager RequestPermission not maintain after reboot

[kiki78]

Hi,

I use Android USB Host library since lot of year, but I have now problem with USB Permission.
UsbManager RequestPermission seems to work and display dialog, and allow permission.
But even if check "Use by default for this USB device", this acceptance is request each time I restart tablet.
Previously I receive this request only once at first run and after it is register for life.

Some idea ?

Regards,

 

[kiki78]

A possible explanation : https://www.sdgsystems.com/post/android-usb-permissions
For now I don't know how to implement that in my B4A project...

 

[Erel]

Have you added the device filter XML: https://www.b4x.com/android/forum/t...e-usb-serial-library.62216/page-2#post-415487

 

[kiki78]

Yes, this previously work since some years.
Previously we use different tablet since Android 4.0 but there are not available now.
We now try to use new tablet with Android 8.

 

[Erel]

It is not related to the Android version but rather to some devices not handling this properly.

 

[kiki78]

I solve the problem
The solution is on https://issuetracker.google.com/issues/77658221
For my project, I just add this line to Manifest Editor

SetActivityAttribute(main, android:directBootAware, "true")

Regards,

 

[Erel]

Good find!