Android Question [FIXED] [B4X] B4XPages - problem with Permissions (not CloseRequest as thought)

[agraham]

I'm playing with CloseRequest which I have placed in B4XMainPage on the ThreePagesExample project. This is an Android 10 device.

'Return True to close, False to cancel
Private Sub B4XPage_CloseRequest As ResumableSub
    Dim sf As Object = xui.Msgbox2Async("Close?", "Title", "Yes", "Cancel", "No", Null)
    Wait For (sf) Msgbox_Result (Result As Int)
    If Result = xui.DialogResponse_Positive Then
        Return True
    End If
    Return False
End Sub

In order for this to keep working I seem to have to uninstall the app before re-installing it again. If I don't the app immediately crashes with a "Sub activity_permissionresult was not found" error when it is reinstalled, and when trying to run it subsequently. Uninstalling before reinstalling it again lets it then behave as expected.

 

[Erel]

I don't think that it is related to the CloseRequest event.

Does it happen in release mode? Can you post the full stack trace?

 

[agraham]

Yes, it happens in release mode. In fact I almost never use Debug mode. It also happens on my Android 8 Samsung A3 as well as my Android 10 Xaiomi Mi Max 3.

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
java.lang.Exception: Sub activity_permissionresult was not found.
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:219)
    at anywheresoftware.b4a.BA$2.run(BA.java:387)
    at android.os.Handler.handleCallback(Handler.java:883)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:224)
    at android.app.ActivityThread.main(ActivityThread.java:7520)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)

It seems to be an interaction between asking for PERMISSION_WRITE_EXTERNAL_STORAGE and trapping CloseRequest. If I comment out either the problem doesn't occur. Perhaps I've got the permission request in the wrong place.

 

[agraham]

You seem to need to allow the PERMISSION_WRITE_EXTERNAL_STORAGE for the problem to occur on the next re-installation. If you don't it behaves as expected.

 

[agraham]

Sorry. I was wrong about the involvement of CloseRequest. I was probably guilty of changing too many things each time I tested. The problem is solely related to accepting the PERMISSION_WRITE_EXTERNAL_STORAGE permission.

 

[Erel]

Confirmed and fixed in RuntimePermissions v1.11. It will be included in the next beta and is also attached (it is an internal library).

 

[ELDON RODRIGUES AQUINO]

Confirmed and fixed in RuntimePermissions v1.11. It will be included in the next beta and is also attached (it is an internal library).

Should I put this library in the BXA library folder or in the external library folder?

 

[asales]

Should I put this library in the BXA library folder or in the external library folder?

"it is an internal library":
B4X Library folder