问纵向MLKit文本识别

EN

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)

    if(requestCode == REQUEST_IMAGE_CAPTURE && resultCode == Activity.RESULT_OK) {
        if (imageUri == null) {
            Log.d(TAG, "imageUri is null!")
            return
        }
        Log.d(TAG, "$imageUri")
        val bmp = MediaStore.Images.Media.getBitmap(contentResolver, imageUri)

        //we need to rotate the image as cameras can be embedded in the hardware in different orientations.  Make the bitmap upright before we attempt to process it..
        val rotatedImg = rotateImageIfRequired(this, bmp, imageUri!!)

        processImage(rotatedImg) //parse this into the ML vision
    } else {
        Log.d(TAG, "onActivityResult -> resultCode: $resultCode")
    }
}

private fun rotateImageIfRequired(context: Context, img: Bitmap, selectedImage: Uri): Bitmap {
    Log.d(TAG, "rotateImageIfRequired")
    val input = context.getContentResolver().openInputStream(selectedImage);
    var ei: ExifInterface? = null
    if (Build.VERSION.SDK_INT > 23)
        ei = ExifInterface(input);
    else
        ei = ExifInterface(selectedImage.getPath());

    val orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);

    when (orientation) {
        ExifInterface.ORIENTATION_ROTATE_90 -> return rotateImage(img, 90f);
        ExifInterface.ORIENTATION_ROTATE_180 -> return rotateImage(img, 180f);
        ExifInterface.ORIENTATION_ROTATE_270 -> return rotateImage(img, 270f);
        else -> return img;
    }
}

private fun rotateImage(img: Bitmap, degree: Float): Bitmap {
    Log.d(TAG, "rotateImage() degree: $degree")
    var matrix = Matrix();
    matrix.postRotate(degree);
    val rotatedImg = Bitmap.createBitmap(img, 0, 0, img.getWidth(), img.getHeight(), matrix, true);
    img.recycle();
    return rotatedImg;
}