Google Mobile Vision — Qr code detector

Bar-code/Qr code detection using Google mobile vision

Mobile Vision APIs which provide bar code detection APIs that read and decode different bar code types, faster, easily and on device.

Bar-code Formats is here,

1. Configure Build.gradle

Add a dependency for play services like this — get latest version from here Google APIs.

dependencies {
implementation 'com.google.android.gms:play-services-vision:15.0.2'
}

2.Setup the Bar-code Detector

look for QR codes and Data Matrices by setting BarcodeFormat.

//  Create your new BarcodeDetector using a builder, and tell it 
//  to look for QR codes and Data Matrices
BarcodeDetector detector =
        new BarcodeDetector.Builder(getApplicationContext())
                .setBarcodeFormats(Barcode.DATA_MATRIX |                Barcode.QR_CODE).build();

//check if our detector is operational before we use it.
if (!detector.isOperational()) {
    Toast.makeText(getApplicationContext(), 
"Could not set up the detector!", Toast.LENGTH_SHORT).show();
    return;
}

3.Detect Bar-code

Build frame using ByteBuffer or Bitmaps, detector returns a SparseArray of barcodes.

Frame frame = new Frame.Builder()
        .setImageData(yourByteBufferData, size.width,
                size.height, camFormat)
        .build();

Frame frame = new Frame.Builder().setBitmap(yourBitmap).build();

SparseArray<Barcode> barcodes = detector.detect(frame);
Barcode barcode = barcodes.valueAt(0);
Textview.setText(barcode.displayValue);

and that’s it — it’s that simple and easy to code and deploy!

Go ahead and explore Firebase ML KIT for Bar-Code detection, HERE.