Android Question [B4X] B4XPages - how to handle PermissionResult

jahswant

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• Jun 11, 2020

• #2

Alexander Stolte said:

I see that the B4XPages has a "PermissionResult" event, how i use it right?

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B4X:

Sub Activity_PermissionResult (Permission As String, Result As Boolean)
    B4XPages.Delegate.Activity_PermissionResult(Permission, Result)
End Sub

 

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Erel

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• Jun 11, 2020

• #3

 

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agraham

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• Jun 11, 2020

• #4

B4X:

'This event will be called once, before the page becomes visible.
Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    'load the layout to Root
    Root.LoadLayout("Login")
    Page2.Initialize
    B4XPages.AddPage("Page 2", Page2)
    Page3.Initialize
    B4XPages.AddPage("Page 3", Page3)
    
    Dim rp As RuntimePermissions
    rp.CheckAndRequest(rp.PERMISSION_CAMERA)
    Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean)
    Log(Permission & " : " & Result)

End Sub

I've tried the above code to test getting the Camera permission but Result is always False! Am I missing something else?

 

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agraham

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• Jun 11, 2020

• #5

My bad I didn't have a Camera instance declared. Now what am I missing to get PERMISSION_WRITE_EXTERNAL_STORAGE to work?

EDIT: Apologies. , I'm really rusty at all this. I needed a reference to File.DirRootExternal to get the permissions. Why does Android make things so complicated

 

Last edited: Jun 11, 2020

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Erel

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• Jun 12, 2020

• #6

The solution is: go to the Logs tab and click on List Permissions. If you don't see the permission marked with an asterisk then you don't need to (and cannot) request it at runtime.

 

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Alexander Stolte

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• Jun 14, 2020

• #7

Erel said:

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hmm, is not working.
The permission request is not shown.

 

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• CrossPlatformProject.zip

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agraham

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• Jun 14, 2020

• #8

You need to add a Camera object to get the need for the permission to be recognised.

 

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Erel

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• Jun 14, 2020

• #9

Alexander See my previous answer.

 

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Alexander Stolte

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• Jun 14, 2020

• #10

Ahh i found the problem, the Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean) is not working if already the permission is allowed.

 

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Erel

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• Jun 14, 2020

• #11

Alexander Stolte said:

Ahh i found the problem, the Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean) is not working if already the permission is allowed.

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It is working assuming that you are using RuntimePermissions v1.11: https://www.b4x.com/android/forum/t...ot-closerequest-as-thought.118914/post-744026

The dialog will not appear however the event will be raised.

 

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