Android Question Download and save the file

[medsport2012]

Hi
I'm trying to save the downloaded file with this code:

Sub DownloadAndSaveFile (Link As String)
    Dim j As HttpJob
    j.Initialize("", Me)
    j.Download(Link)
    Wait For (j) JobDone(j As HttpJob)
    If j.Success = True Then
        Dim out As OutputStream = File.OpenOutput(File.DirInternal, "Stop.mp3", False)
        File.Copy2Async(j.GetInputStream, out)
        out.Close
        Log("Success")
    Else
        Log("Fail")
    End If
    j.Release
End Sub

but nothing happens, If i write the path to the folder:

Dim out As OutputStream = File.OpenOutput("/storage/emulated/0/LS2018", "Stop.mp3", False)

I'am getting this error:

 

[DonManfred]

but nothing happens

Do you get the "Success" output in the log? I guess yes.

Please post errors as text instead of Images.

 

[medsport2012]

Yes, i got "Success", but the file wasn't saved, so problem is in saving.
Error:
Error occurred on line: 51 (Main)
java.io.FileNotFoundException: /storage/emulated/0/LS2018/Stop.mp3: open failed: EPERM (Operation not permitted)
at libcore.io.IoBridge.open(IoBridge.java:492)
at java.io.FileOutputStream.<init>(FileOutputStream.java:236)
at anywheresoftware.b4a.objects.streams.File.OpenOutput(File.java:449)
at b4a.example.main$ResumableSub_DownloadAndSaveFile.resume(main.java:499)
at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resumeAsUserSub(DebugResumableSub.java:48)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:348)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:193)
at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resume(DebugResumableSub.java:43)
at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:267)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:137)
at anywheresoftware.b4a.BA$2.run(BA.java:387)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:246)
at android.app.ActivityThread.main(ActivityThread.java:8506)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
Caused by: android.system.ErrnoException: open failed: EPERM (Operation not permitted)
at libcore.io.Linux.open(Native Method)
at libcore.io.ForwardingOs.open(ForwardingOs.java:166)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:254)
at libcore.io.ForwardingOs.open(ForwardingOs.java:166)
at android.app.ActivityThread$AndroidOs.open(ActivityThread.java:8367)
at libcore.io.IoBridge.open(IoBridge.java:478)
... 22 more

 

[DonManfred]

Yes, i got "Success", but the file wasn't saved, so problem is in saving.

It IS saved! In DirInternal.

But you are trying to save it to another place. This is the issues you have to start with,
As the error point out you do not have the permission to write to the path you want.

android.jar / targetSdkVersion / minSdkVersion

There are several versioned components that affect the compilation process and the runtime behavior of our apps. The purpose of this tutorial is to explain the differences between them and help you choose which version to use. Each Android version is mapped to an api level. You can see this...

www.b4x.com

 

[Mahares]

Dim out As OutputStream = File.OpenOutput("/storage/emulated/0/LS2018", "Stop.mp3", False)

From the looks of the path, it appears that it refers to File.DirExternal which requires runtime permission or in newer Android OS version you may not even be able to access the secondary storage at all. but the proper place to save it is File.DirInternal ( equivalent to XUI.DefaultFolder) which requires no permission.
Take a look here where you might be able to save it:

SaveAs - Let the user select a target folder + list of other related methods

B4A + B4i example: https://www.b4x.com/android/forum/threads/b4x-texteditor-save-and-load-external-files.132731/#post-838166 List of classes or libraries that can be used to access secondary storages: ContentChooser (Phone libray) - allows the user to select a resource or file using external...

www.b4x.com

 

[medsport2012]

It IS saved! In DirInternal.

But you are trying to save it to another place. This is the issues you have to start with,
As the error point out you do not have the permission to write to the path you want.

android.jar / targetSdkVersion / minSdkVersion

There are several versioned components that affect the compilation process and the runtime behavior of our apps. The purpose of this tutorial is to explain the differences between them and help you choose which version to use. Each Android version is mapped to an api level. You can see this...

www.b4x.com

I tried to find the file in explorer, but it isn't there, how can i find it?

 

[medsport2012]

As i understand, there is no access to this folder without root?

 

[medsport2012]

It IS saved! In DirInternal.

But you are trying to save it to another place. This is the issues you have to start with,
As the error point out you do not have the permission to write to the path you want.

android.jar / targetSdkVersion / minSdkVersion

There are several versioned components that affect the compilation process and the runtime behavior of our apps. The purpose of this tutorial is to explain the differences between them and help you choose which version to use. Each Android version is mapped to an api level. You can see this...

www.b4x.com

Thaks a lot, i managed to save the file but it's empty.

 

[eric19740521]

You need to give android file permission. and write to the correct location...

https://cdn.pixabay.com/download/audio/2022/03/10/audio_b195486a22.mp3?filename=price-of-freedom-33106.mp3

b4a APP downloaded mp3
I test the music file. The music is pleasant...
(Android-->data-->b4a.example-->files)

Maybe consider testing this code in b4j first. Maybe easier