Sample QR Code Reader

Sample app showcasing how to implement QR Code Reading in Android using CameraX and 2 different libs:

• Google ML Kit - Barcode Scanning
• ZXing - Zebra Crossing

APK Sizes

It's worth mentioning that the final apk sizes using ZXing OR ML Kit are very different:

• Google ML Kit
  • debug: 14.1 MB
  • release: 12.5 MB
• ZXing
  • debug: 5.2 MB
  • release: 4.2 MB
• Just CameraX (running preview only) for comparison
  • debug: 4.9 MB
  • release: 4 MB

Git repository structure

There are 2 main branches in the repo:

• mlkit: branch with the ML Kit implementation in :app module
• zxing: branch with the ZXing implementation in :app module

References

The implementation here was based on two posts:

• How to Create a QR Code Scanner App in Android
• Using Google’s MLKit and CameraX for Lightweight Barcode Scanning