Android Question Unable to store in Pictures folder

[jlalexie]

Hello,

I'm trying to store an image in pictures.
But I get an error message:

java.lang.RuntimeException:

java.io.FileNotFoundException: /storage/emulated/0/Pictures/Image5_1.jpeg: open failed: EPERM (Operation not permitted)

I suppose there is a problem with permissions, but I don't know this subject.
Attached my manifest file.

Dim picturesFolder As String = File.Combine(File.DirRootExternal, "Pictures" )
StoreCanvasToJpeg (picturesFolder,filename)

Sub StoreCanvasToJpeg (folder As String, filename As String)
Dim Out As OutputStream

............


Out = File.OpenOutput(folder, filename, False)
CanvasCible.Bitmap.WriteToStream(Out, 100, "JPEG")
Out.Close
End Sub

<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="28"/>
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />

 

[Alexander Stolte]

Please read the following thread:

Runtime Permissions (Android 6.0+ Permissions)

1. Edit: In B4XPages the permission result event signature is: Wait For B4XPage_PermissionResult (Permission As String, Result As Boolean) 2. Important to read: https://www.b4x.com/android/forum/threads/android-jar-targetsdkversion-minsdkversion.87610/#content If the targetSdkVersion is...

www.b4x.com

especially the area of "READ_EXTERNAL_STORAGE / WRITE_EXTERNAL_STORAGE"

 

[Shelby]

Any chance the format of the problem image is not the same format as the rest of the images in the folder?

 

[jlalexie]

Thanks for answer

it works (tested on android 8 to 11)

I already have in manifest:

<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="28"/>

I made the following changes
In manifest

AddPermission(android.permission.WRITE_EXTERNAL_STORAGE)

Add runtime permission in main

rp.CheckAndRequest(rp.PERMISSION_WRITE_EXTERNAL_STORAGE)
Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
If Result = True Then
Activity.LoadLayout("main")
Log(rp.GetSafeDirDefaultExternal(""))
Else .....
End If

I store images in the folder

picturesFolderRoot As String = "/storage/emulated/0/DCIM/CEMP"

For others app datas to store:

StoreFolder=rp.GetSafeDirDefaultExternal("")