Building a QR and barcode scanner for Android taught me that the hardest part is not simply detecting a code.
The real challenge is turning scanning into a useful workflow.
For my project, I wanted the app to do more than open a link after scanning. I wanted users to be able to keep scan history, organize results, work with QR codes and barcodes, and use the scanner as a practical productivity tool. The Android app is built with Kotlin and uses modern Android components.
For camera access, I use CameraX.
For code detection, I use ML Kit because it provides reliable support for QR codes and multiple barcode formats.
At first, scanning looks simple:
But once the app grows, many UX decisions appear.
For example: These details can have a bigger impact on the user experience than the scanner itself.
One thing I wanted to avoid was designing the app as if barcodes were only product numbers.
Barcode formats are also used in logistics, manufacturing, inventory systems and other workflows.
That means the app should treat scanned data flexibly instead of assuming every result is just a numeric product ID.
The project gradually evolved into a larger tool.
Instead of treating each scan as something temporary, the idea is to let users keep and organize useful information after scanning.
This is also why I am experimenting with productivity features around projects and data export.
The main lesson was simple:
A feature can work technically and still need a lot of work before it feels useful.
Camera performance, feedback, organization and small interface decisions all matter.
I am continuing to develop Android tools under NEVIRAX.
You can find the project and more technology-related content here: