react-native-scan-barcode (npm): A barcode scanner component for react native android. The library uses https://github.com/zxing/zxing to decode the barcodes. For iOS you can use https://github.com/lwansbrough/react-native-camera.
Keywords: react|react-native|react-component|android|scan-barcode|barcode|qrcode|scanner|barcodereader