Android Question Error : java.io.FileNotFoundException: /storage/......

[ciginfo]

Hello,
I don't understant why I obtain this error :
java.io.FileNotFoundException: /storage/3064-3162 (Is a directory)
In the Manifest Editor, I have:
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="29"/>

An idea?
Thank you

Sub Globals
    Dim MySet1, MySet2 As Double
    Dim FileSETTINGS As String     
End Sub

Sub SAUVE_Click
    Dim Settings As List
    Settings.Initialize
    MySet1 = 100
    MySet2 = 200
    Settings.Add(MySet1)
    Settings.Add(MySet2)
    File.WriteList(File.DirRootExternal,FileSETTINGS,Settings)
End Sub

 

[JohnC]

Try adding this to the manifest:

SetApplicationAttribute(android:requestLegacyExternalStorage, true)

 

[DonManfred]

File.WriteList(File.DirRootExternal,FileSETTINGS,Settings)

android.jar / targetSdkVersion / minSdkVersion

Especially RuntimePermissions

To Access External Storages you need to use

ExternalStorage - Access SD cards and USB sticks

Before we start: External storage means a real sd card or a connected mass storage USB device. This class can also be used to access the secondary storage (File.DirRootExternal). This becomes relevant with newer versions of Android that restrict direct access. It has nothing to do with runtime...

www.b4x.com

 

[ciginfo]

Have I to write
File.WriteList(File.DirDefaultExternal,FileSETTINGS,Settings)
even if there is an external storage as à SD card ? Or i 'm following a bad track ?

 

[Pendrush]

File.DirDefaultExternal - this will be probably impossible to do with Android 12, you better use File.DirInternal.
More on links:
https://developer.android.com/training/data-storage

Storage updates in Android 11 | Android Developers

Android 11 introduces significant enhancements to external storage management, strengthening user data protection through improved scoped storage, new media file access methods, and refined permission models.

developer.android.com

 

[JohnC]

If the reason you are trying to save the settings to external memory is because you want to "export" your settings so the user can copy them elsewhere (cloud), then you can do that using the File Provider method:

[class] FileProvider - share files

Edit: FileProvider is included as an internal library now. After investigating several issues with the current FileProvider code that you can find in the forum, I decided to make some improvements and implement it in a class. Starting from Android 7 (API 24) you cannot directly share file uris...

www.b4x.com

Sharing files from your app with File Provider

Example was updated based on FileProvider class: https://www.b4x.com/android/forum/threads/class-fileprovider-share-files.97865/ See the above link if you are interested in sharing files from your app. This tutorial explains the steps required to implement a file picker that other applications...

www.b4x.com

 

[ciginfo]

Hello,
Now it runs with DirInternal,

Sub SAUVE_Param_Click
    Dim Settings As List
    Dim MySet1, MySet2 as Double
    Settings.Initialize
    MySet1 = 100
    MySet2 = 200
    Settings.Add(MySet1)
    Settings.Add(MySet2)
    File.WriteList(File.DirInternal,FileSETTINGS,Settings)
End Sub

But I cannot recover data : Error
java.io.FileNotFoundException: /data/user/0/ciginfo.Join_Me_New/files (Is a directory)

Sub LOAD_Param
    Dim List1 As List
    Dim MySet1, MySet2 As Double
    If File.Exists(File.DirInternal,FileSETTINGS) Then
        List1 = File.ReadList(File.DirInternal,FileSETTINGS)
        MySet1 = Location.Get(0)
        MySet2 = Location.Get(1)
        'Affiche
        LblSet1.Text = MySet1
        LblSet2.Text = MySet2
    End If
End Sub

Error With This line : List1 = File.ReadList(File.DirInternal,FileSETTINGS)

 

[DonManfred]

looks like FileSETTINGS is not set?

 

[ciginfo]

FileSETTINGS is declared in globals