Image rotation restore for devices with physically rotated camera

ImageRotationRestore.kt

 @Throws(IOException::class)
  private fun restoreBitmapRotation(bitmapFile: File): Bitmap {
    val exif = ExifInterface(Uri.fromFile(bitmapFile).path)
    val orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL)

    val rotationAngle = when (orientation) {
      ExifInterface.ORIENTATION_ROTATE_90 -> 90f
      ExifInterface.ORIENTATION_ROTATE_180 -> 180f
      ExifInterface.ORIENTATION_ROTATE_270 -> 270f
      else -> 0f
    }

    val imageToRotate = BitmapFactory.decodeFile(bitmapFile.absolutePath)
    val matrix = Matrix()
    matrix.postRotate(rotationAngle)

    return Bitmap.createBitmap(imageToRotate, 0, 0, imageToRotate.width, imageToRotate.height, matrix, true)
  }