谷歌安卓移动视觉-如何阅读Ean13与插件(5和2个字符的长度)？

dependencies {
    implementation 'com.google.mlkit:barcode-scanning:16.1.1'
}

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.device.camera" />

import com.google.mlkit.vision.barcode.BarcodeScanner;
import com.google.mlkit.vision.barcode.BarcodeScannerOptions;
import com.google.mlkit.vision.barcode.common.Barcode;
import com.google.mlkit.vision.barcode.common.BarcodeFormat;

// ...

private BarcodeScanner barcodeScanner;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    BarcodeScannerOptions options = new BarcodeScannerOptions.Builder()
            .setRequestedBarcodeFormats(BarcodeFormat.EAN_13)
            .build();

    barcodeScanner = BarcodeScanner.create(options);
}

private void startCameraPreview() {
    // 在此处添加启动相机预览的代码
    // 例如，使用CameraX库或Camera2 API
}

private final BarcodeScanner.Callback barcodeCallback = new BarcodeScanner.Callback() {
    @Override
    public void onResults(@NonNull List<Barcode> barcodes) {
        for (Barcode barcode : barcodes) {
            if (barcode.getFormat() == BarcodeFormat.EAN_13) {
                String ean13Code = barcode.getRawValue();
                // 处理EAN-13条形码
                handleEan13Code(ean13Code);
            }
        }
    }

    @Override
    public void onFailure(@NonNull Exception e) {
        // 处理失败情况
    }
};

private void handleEan13Code(String ean13Code) {
    // 在此处处理EAN-13条形码
    // 例如，查询产品信息或验证条形码
}

@Override
protected void onResume() {
    super.onResume();
    startCameraPreview();
}

@Override
protected void onPause() {
    super.onPause();
    barcodeScanner.close();
}