Android Question image is rotated when bitmap is loaded in the imageview

[leitor79]

Hi,

Sub chooser_Result (Success As Boolean, Dir As String, FileName As String)
    If Success Then
        Dim bmp As Bitmap
        bmp.Initialize(Dir, FileName)
        imgFoto.Bitmap = bmp
    End If
.
.
.

The image in the chooser is shown right, no matter if the picture was taken portrait or landscape or if it is a screenshot.

I've tried using the ExifData library, but orientation returns always 0:

Dim exif As ExifData
Dim sOrientation As String
exif.Initialize(Dir, FileName)
sOrientation = exif.getAttribute(exif.TAG_ORIENTATION)

I've checked here and here; It's correct to assume that if the orientation is 0, the picture has no orientation registered?

Thank you!

 

[Erel]

Try to copy the image to a temporary file (File.Copy2 and don't forget to close the OutputStream) and see whether exif returns the correct orientation of the newly created file.

 

[leitor79]

Thanks Erel, that seems to work (after trying 10 different pictures, none of the previous due to a device change)

Is there an explanation for this working with a copied file and not with the "original"?

Thank you very much!

 

[Erel]

The real problem here is that the exif.getAttribute returns 0 instead of throwing an error when it fails to read the attributes. It fails to read them because it cannot handle the dir passed which is not a real file system path.

 

[leitor79]

Thank you very much; I'm taking notes for some similar problem. I've noticed the "strange" path but I thought it could be manageable.

Thank you very much.