Wrong picture orientation on Samsung devices

Hi,

After taking a picture with this library I create a Bitmap and set it in an ImageView as follow:

 public void onPictureTaken(CameraView cameraView, byte[] data) {
     Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
     imageView.setImageBitmap(bitmap);
}

This works fine on a Nexus 5X, however on Samsung devices the picture orientation appears to be incorrectly rotated 90 degrees to the left when the device orientation is portrait. Is there a way to fix this issue?

[ivacf]

I don’t think this is a issue with the library anymore, the application should be in charge of rotating the image if necessary by reading the image Exif data. This can be easily achieved using the new Exif support library

The exif library allows you to easily find out how much you have to rotate the image before you display it to the user. This is how it could be done:

@Override
public void onPictureTaken(CameraView cameraView, byte[] data) {
            // Find out if the picture needs rotating by looking at its Exif data
            ExifInterface exifInterface = new ExifInterface(new ByteArrayInputStream(data));
            int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);
            int rotationDegrees = 0;
            switch (orientation) {
                case ExifInterface.ORIENTATION_ROTATE_90:
                    rotationDegrees = 90;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    rotationDegrees = 180;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_270:
                    rotationDegrees = 270;
                    break;
            }
            // Create and rotate the bitmap by rotationDegrees
}

I think this issue can be closed now.

[MoustafaElsaghier]

Solved on Samsung and sony devices (tested devices).

I’ve solved this issue by checking if the width > height of the image then rotate by 90

private static int fixOrientation(Bitmap bitmap) {
        if (bitmap.getWidth() > bitmap.getHeight()) {
            return 90;
        }
        return 0;
    }

then I call this method to apply the rotation if needed

public static Bitmap flipIMage(Bitmap bitmap) {
        //Moustafa: fix issue of image reflection due to front camera settings
        Matrix matrix = new Matrix();
        int rotation = fixOrientation(bitmap);
        matrix.postRotate(rotation);
        matrix.preScale(-1, 1);
        return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
    }

the reason why I set scale by (-1,1) because I use front camera and need to fix the refliction issue of camera.

hope this solves the issue you have.