Where's my new Directory

[sterlingy]

I've seen various posts on this, and I've tried different things to no avail.

If File.ExternalWritable Then
        File.MakeDir(File.DirRootExternal, "Scooper")
        Dir = File.DirRootExternal & "/PooperScooper"

    Else
        File.MakeDir(File.DirRootExternal, "Scooper")
        Dir = File.DirRootExternal & "/Scooper"
Log("dir: " & Dir)
    End If

Here is where the directory was created, using DirRootExternal: "/storage/emulated/0/Scooper"

I'm running this on a Nexus 7, which doesn't have external storage.

So then I forced it to use DirInternal and this is where it put the directory: "/data/data/b4a.example/files/Scooper"

Needless to say, I can't find either of the directories on my device.

Any clues?

-Sterling

 

[bgsoft]

Hi Sterling

I'm not very expert in B4A, but I think you're confusing terms:

File.DirRootExternal = / storage/sdcard0. No external memory card

File.DirDefaultExternal = / storage/sdcard0/Android/data / "Package Name"/ files

File.DirInternal = / data / data / "Package Name" / files
The folder in the device internal storage that is uses to save application private data.


If you want to know where each directory you can do something as simple as:

Sub Activity_Click
   ' for test
   
   Log("File.ExternalWritable = " & File.ExternalWritable)
   Log("File.DirDefaultExternal= " & File.DirDefaultExternal)
   Log("File.DirRootExternal= " & File.DirRootExternal)
   Log("File.DirInternal= " & File.DirInternal)
   
End Sub

Hope that helps

Jesus

 

[Inman]

I'm running this on a Nexus 7, which doesn't have external storage.

On devices like Nexus 7 which doesn't have an sd card slot (and on devices like Galaxy S3 which has a large internal memory, in addition to the card slot), a large portion of the internal memory gets mounted as virtual SD card. And that is where the directory will get created when you use RootExternal or DefaultExternal.

 

[sterlingy]

This is what truly puzzles me:

Later in my code, I write to a file:

Dim raf As RandomAccessFile

raf.Initialize(File.DirRootExternal, "optionSetting.txt", False)
raf.WriteObject(opMusicCtrl.Top, True,raf.CurrentPosition)
raf.WriteObject(opSFXCtrl.Top, True,raf.CurrentPosition)
raf.Close

If the file doesn't exist, it is created, and this is in the DirRootExternal. So why won't it make the directory in the same folder?

-Sterling

 

[sterlingy]

When I run the app on my GalaxyS 3, it creates the file and the directory, in the same internal root directory that the file was created on the nexus, despite the fact that the GS3 does have an external memory card.

-Sterling

 

[bgsoft]

Hello

I do not understand your problem.
I tried your code and creates the file in File.DirRootExternal, which is:

storage/sdcard0

Where do you want to create the file?

if you want to save on the external memory card, you'll have to put this:

/storage/extSdCard

Uses a filemanager app and you will know what your name is. Or you can use the FileDialog of b4a

Jesus

 

[sterlingy]

I don't really care where the directory is created. My point is that it seems to work on my GS3 but not my Nexus7. Both can create a file in DirRootExternal, but only the GS3 can make a directory in DirRootExternal.

-Sterling

 

[bgsoft]

Try adding this in the Manifest, but it should work, but sometimes not known.

AddPermission (android.permission.READ_EXTERNAL_STORAGE)

-------------

public static final String READ_EXTERNAL_STORAGE
Added in API level 16

Allows an application to read from external storage.

Any app that declares the WRITE_EXTERNAL_STORAGE permission is implicitly granted this permission.

Currently, this permission is not enforced and all apps still have access to read from external storage without this permission. That will change in a future release and apps will require this permission to read from external storage. So if your app reads from the external storage, you should add this permission to your app now to ensure that it continues to work on future versions of Android.

You can test your app with the permission enforced by either running your app on the Android Emulator when running Android 4.1 or higher, or enabling Protect USB storage under Developer options in the Settings app on a device running Android 4.1 or higher.

Note: If both your minSdkVersion and targetSdkVersion values are set to 3 or lower, the system implicitly grants your app this permission. If you don't need this permission, be sure your targetSdkVersion is 4 or higher.
Constant Value: "android.permission.READ_EXTERNAL_STORAGE"
---------------

Jesus

 

[sterlingy]

Things are working. I didn't have to change the manifest. The error was in the communication between my PC and the device.

I was using windows to browse the device, and even search for the specific folder and files, but it never returned any results.

Eventually, I opened up ES File Explorer on the device, and sure enough, everything was there. I guess I won't be using the PC to look for files on the device anymore.

Cheers,

Sterling

 

[bgsoft]

I'm glad it works for you.

That happened to me once and I saw the problem with the phone filemanager.

After changing something on the phone, if you leave and re-enter Windows Explorer PC will have the information OK

regards

Jesus