You need to account for all orientations not just 90 or 180. I am using this
File curFile = new File("path-to-file"); // ... This is an image file from my device.
Bitmap rotatedBitmap;
try {
ExifInterface exif = new ExifInterface(curFile.getPath());
int rotation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
int rotationInDegrees = exifToDegrees(rotation);
Matrix matrix = new Matrix();
if (rotation != 0f) {matrix.preRotate(rotationInDegrees);}
rotatedBitmap = Bitmap.createBitmap(bitmap,0,0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}catch(IOException ex){
Log.e(TAG, "Failed to get Exif data", ex);
}
and:
/**
* Gets the Amount of Degress of rotation using the exif integer to determine how much
* we should rotate the image.
* @param exifOrientation - the Exif data for Image Orientation
* @return - how much to rotate in degress
*/
private static int exifToDegrees(int exifOrientation) {
if (exifOrientation == ExifInterface.ORIENTATION_ROTATE_90) { return 90; }
else if (exifOrientation == ExifInterface.ORIENTATION_ROTATE_180) { return 180; }
else if (exifOrientation == ExifInterface.ORIENTATION_ROTATE_270) { return 270; }
return 0;
}