How to Build an Android QR Scanner in Kotlin (CameraX & ML Kit)

Google ML Kit provides on-device machine learning models for sub-millisecond barcode scanning in Android applications.

Gradle Dependencies

implementation 'com.google.mlkit:barcode-scanning:17.2.0'
implementation 'androidx.camera:camera-camera2:1.3.0'

ML Kit runs completely on-device without network latency, detecting QR codes even in low light and angled camera orientations.