How QR Code Scanner Work in Android Studio

Updated 31 May 2021


In this article, we will read How QR Code Scanner Work in Android Studio . QR code stands for quick response code. It is 2 dimension bar code.QR code may store some data and this data can read by a Camera.

To generate your own QR Code you can go to this link.

Let’s start code


For the Camera and bar code Detector we will use the following dependency


In MainActivity we create a button and when you click on that button you will be redirected to Scanner Acitivity.



when you click on the button you will be redirected to ScanBarCodeActivity.


In initViews() method we parse intent data that is scanned from the scanner and on the resume method, we initialized initialiseDetectorsAndSources(). When we detect any code then reciveDetection() method will be called and intent data will be displayed.



Please check attached screenshot.In First Screenshot you can see Main Layout and when you click on scan button then camera will be open.After scanning QR code bar code detector will detect code and then you can see that code or search the link.



So Here we discussed  How QR Code Scanner Work in Android Studio . Thanks for reading this blog and You can get other blogs from here

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