The Barcode Scanner Plugin is used to scan barcodes and uses the ZXing Library (https://github.com/zxing/zxing).
For Android it uses the fork: https://github.com/OutSystems/zxing-android-embedded
In this projetct we are using the file zxing-android-embedded-4.2.0-OS.aar and adding through the plugin.xml. The file was compiled using jitpack and the download of the .aar file is from here