android - Exif data TAG_ORIENTATION always 0

Question

I need to know the orientation of an image from the gallery (taken by the camera). My initial approach was to use MediaStore.Images.Media.ORIENTATION which was working for my Droid 1. While testing on the HTC Thunderbolt that phone only saves 0 to that field.

I then moved to reading the exif data:

 ExifInterface exifReader = new ExifInterface(mFilePath);
 exifReader.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1);

This also returns 0 for every image. Anyone have ideas on how to properly get the orientation of a photo take on android?

Answer 1

Here is the code I used onActivityResult() in my activity. The intent returned was for picking an image of the type image/*. Works well for me!

Uri imageUri = intent.getData();
String[] orientationColumn = {MediaStore.Images.Media.ORIENTATION};
Cursor cur = managedQuery(imageUri, orientationColumn, null, null, null);
int orientation = -1;
if (cur != null && cur.moveToFirst()) {
    orientation = cur.getInt(cur.getColumnIndex(orientationColumn[0]));
}  
Matrix matrix = new Matrix();
matrix.postRotate(orientation);