react-native-barcodescanner

A barcode scanner component for React Native Android. For iOS you can use https://github.com/lwansbrough/react-native-camera. The library depends on https://github.com/dm77/barcodescanner and https://github.com/zxing/zxing.

Installation

npm i --save react-native-barcodescanner

Add it to your android project

• In android/setting.gradle

...
include ':ReactNativeBarcodescanner', ':app'
project(':ReactNativeBarcodescanner').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-barcodescanner/android')

• In android/app/build.gradle

...
dependencies {
    ...
    compile project(':ReactNativeBarcodescanner')
}

• register module (in MainActivity.java)

import com.eguma.barcodescanner.BarcodeScanner;  // <--- import

public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler {
  ......

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mReactRootView = new ReactRootView(this);

    mReactInstanceManager = ReactInstanceManager.builder()
      .setApplication(getApplication())
      .setBundleAssetName("index.android.bundle")
      .setJSMainModuleName("index.android")
      .addPackage(new MainReactPackage())
      .addPackage(new BarcodeScanner())              // <------ add here
      .setUseDeveloperSupport(BuildConfig.DEBUG)
      .setInitialLifecycleState(LifecycleState.RESUMED)
      .build();

    mReactRootView.startReactApplication(mReactInstanceManager, "ExampleRN", null);

    setContentView(mReactRootView);
  }

  ......

}

Example

var BarcodeScanner = require('react-native-barcodescanner');

var BarcodeScannerExampleApp = React.createClass({
  getInitialState() {
    return ({
      torchMode: 'off',
      cameraType: 'back',
    });
  },

  barcodeReceived(e) {
    console.log('Barcode: ' + e.data);
    console.log('Type: ' + e.type);
  },

  render() {
    return (
      <BarcodeScanner
        onBarCodeRead={this.barcodeReceived}
        style={{ flex: 1 }}
        torchMode={this.state.torchMode}
        cameraType={this.state.cameraType}
      />
    );
  }
});

Properties

onBarCodeRead

Will call the specified method when a barcode is detected in the camera's view. Event contains data (barcode value) and type (barcode type). The following barcode types can be recognised:

BarcodeFormat.UPC_A
BarcodeFormat.UPC_E
BarcodeFormat.EAN_13
BarcodeFormat.EAN_8
BarcodeFormat.RSS_14
BarcodeFormat.CODE_39
BarcodeFormat.CODE_93
BarcodeFormat.CODE_128
BarcodeFormat.ITF
BarcodeFormat.CODABAR
BarcodeFormat.QR_CODE
BarcodeFormat.DATA_MATRIX
BarcodeFormat.PDF_417

torchMode

Values: on, off (default)

Use the torchMode property to specify the camera torch mode.

cameraType

Values: back (default), front

Use the cameraType property to specify the camera to use. If you specify the front camera, but the device has no front camera the back camera is used.

Viewfinder properties

The following properties can be used to style the viewfinder:

viewFinderBackgroundColor, viewFinderBorderColor, viewFinderBorderWidth, viewFinderBorderLength, viewFinderDrawLaser, viewFinderLaserColor

All color values are strings and must be specified as #AARRGGBB (alpha, red, green, blue). viewFinderBorderWidth and viewFinderBorderLength are numbers, viewFinderDrawLaser is either true or false (default). For a better overview of the viewfinder see .