Android Question Android 13 and Android 14 PERMISSION_WRITE_EXTERNAL_STORAGE problem

H

hung

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Longtime User
This is the code working for years up to Android 12 since Android 8.

B4X: 
    gRp.CheckAndRequest(gRp.PERMISSION_WRITE_EXTERNAL_STORAGE)
    Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
    If Result Then
        Dim outs As OutputStream = File.OpenOutput(gRp.GetSafeDirDefaultExternal("") , gs_filename, False)
    ...
        outs.Close
    Else
        ToastMessageShow("Failed to create file", False)
    End If

manifest is like this
B4X: 
AddManifestText(<uses-permission
    android:name="android.permission.WRITE_EXTERNAL_STORAGE"
    android:maxSdkVersion="30" />
)

I recall it worked in Android 13 about a month ago. But now failed to get permission then prompt "Failed to create file" all the time.

I am not using Google Store but put apk in private server for download.

I recently compiled min sdk 21 and target sdk 35. Now recompiled as min sdk 21 and target sdk 33. Neither working.
 
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mcqueccu

mcqueccu

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H

hung

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Longtime User
Thanks. Tried your example which works but failed when I use GetSafeDirDefaultExternal.

I further debug then found the following

B4X: 
 gRp.CheckAndRequest(gRp.PERMISSION_WRITE_EXTERNAL_STORAGE)
    Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
    If Result Then
    ...

The problem is CheckAndRequest failed to return permissionResult (in Android 13 and 14, but no issue in Android 9-12), hence timeout then prompt "failed" message.

If I comment the CheckAndRequest and Wait For Acitivity_PermissionResult, and and comment "If Result then", I can create file in GetSafeDirDefaultExternal folder. i.e. my app has got access to create new files.

Then question is why CheckAndRequest(gRp.PERMISSION_WRITE_EXTERNAL_STORAGE) failed?
 
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Sagenut

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You are using
B4X: 
gRp.GetSafeDirDefaultExternal("")
As far as I know this does not require any permission.
So the request for
B4X: 
PERMISSION_WRITE_EXTERNAL_STORAGE
it's not needed, I think.
 
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H

hung

Active Member
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Longtime User
Thank you Sagenut. This works (I thought it was workaround ).

Also notice there was new b4x deployed by Erel. Download and use new ide to compile, solved other part of my problems. i.e. next time when Erel release a version, should download and recompile and test app asap.
 
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