barcode

https://developers.google.com/ml-kit/vision/barcode-scanning/android?hl=zh-tw

https://medium.com/codex/scan-barcodes-in-android-using-the-ml-kit-30b2a03ccd50

https://www.simplifiedcoding.net/android-qr-code-scanner-example/#project-setup

here ok

https://www.youtube.com/watch?v=XUN6mUQiDpg

https://developer.android.com/media/camera/camerax?hl=zh-tw