Hyperlink-Android/app/src/main/java/dev/garrettmills/starship/hyperlink/scanner/QRCodeImageAnalyzer.java

package dev.garrettmills.starship.hyperlink.scanner;

import android.util.Log;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.camera.core.ImageAnalysis;
import androidx.camera.core.ImageProxy;
import androidx.core.content.ContextCompat;

import java.nio.ByteBuffer;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.ChecksumException;
import com.google.zxing.FormatException;
import com.google.zxing.NotFoundException;
import com.google.zxing.PlanarYUVLuminanceSource;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.multi.qrcode.QRCodeMultiReader;

import static android.graphics.ImageFormat.YUV_420_888;
import static android.graphics.ImageFormat.YUV_422_888;
import static android.graphics.ImageFormat.YUV_444_888;

public class QRCodeImageAnalyzer implements ImageAnalysis.Analyzer {
    private QRCodeListener listener;

    public QRCodeImageAnalyzer(QRCodeListener listener) {
        this.listener = listener;
    }

    @Override
    public void analyze(@NonNull ImageProxy image) {
        if ( image.getFormat() == YUV_420_888 || image.getFormat() == YUV_422_888 || image.getFormat() == YUV_444_888 ) {
            ByteBuffer byteBuffer = image.getPlanes()[0].getBuffer();
            byte[] imageData = new byte[byteBuffer.capacity()];
            byteBuffer.get(imageData);

            PlanarYUVLuminanceSource source = new PlanarYUVLuminanceSource(
                    imageData,
                    image.getWidth(), image.getHeight(),
                    0, 0,
                    image.getWidth(), image.getHeight(),
                    false
            );

            BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(source));

            try {
                Result result = new QRCodeMultiReader().decode(binaryBitmap);
                listener.onQRCodeFound(result.getText());
                Log.i("QRCodeImageAnalyzer", "QRCode found");
            } catch (FormatException | ChecksumException | NotFoundException e) {
                listener.onQRCodeNotFound();
                Log.i("QRCodeImageAnalyzer", "QRCode not found");
            }
        } else {
            Log.i("QRCodeImageAnalyzer", "Incorrect image format");
        }

        image.close();
    }
}