Android: Read image file from disk, and upright.

exif_rotate_file.kt

    private fun Bitmap.rotate(degrees: Float): Bitmap {
        val matrix = Matrix()
        matrix.postRotate(degrees)
        val scaledBitmap = Bitmap.createScaledBitmap(this, width, height, true)
        return Bitmap.createBitmap(
            scaledBitmap,
            0,
            0,
            scaledBitmap.width,
            scaledBitmap.height,
            matrix,
            true
        )
    }

   private fun handleRotation(imgPath: String) {
        BitmapFactory.decodeFile(imgPath)?.let { origin ->
            try {
                ExifInterface(imgPath).apply {
                    getAttributeInt(
                        ExifInterface.TAG_ORIENTATION,
                        ExifInterface.ORIENTATION_UNDEFINED
                    ).let { orientation ->
                        when (orientation) {
                            ExifInterface.ORIENTATION_ROTATE_90 -> origin.rotate(270f)
                            ExifInterface.ORIENTATION_ROTATE_180 -> origin.rotate(180f)
                            ExifInterface.ORIENTATION_ROTATE_270 -> origin.rotate(90f)
                            ExifInterface.ORIENTATION_NORMAL -> origin
                            else -> origin
                        }.also { bitmap ->
                            //Update the input file with the new bytes.
                            try {
                                FileOutputStream(imgPath).use { fos ->
                                    bitmap.compress(
                                        Bitmap.CompressFormat.JPEG,
                                        100,
                                        fos
                                    )
                                }
                            } catch (e: Exception) {
                                e.printStackTrace()
                            }
                        }
                    }
                }
            } catch (e: IOException) {
                e.printStackTrace()
            }
        }
    }

origin.recycle() and bitmap.recycle() not required here?

should be, should not be.
let the client programmer decide who uses these pieces codes.