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.

Breaking change

React native 0.19 changed the ReactProps class which led to problems with updating native view properties (see facebook/react-native#5649). These errors are corrected in react-native-barcodescanner version 1.0.0. Use version 1.0.0 and larger for react native >=0.19 and for earlier react native versions use version 0.1.4.

Installation

npm i --save react-native-barcodescanner

Add it to your android project

In android/settings.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')
}

Add the following import statement:

import com.eguma.barcodescanner.BarcodeScanner;

...and then add BarcodeScanner to exported package list (MainActivity.java#getPackages):

public class MainActivity extends ReactActivity {
    // (...)

    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
        new MainReactPackage(),
        new BarcodeScanner()
      );
    }
}

Example

import React, {
  AppRegistry,
  Component,
} from 'react-native';
import BarcodeScanner from 'react-native-barcodescanner';

class BarcodeScannerExampleApp extends Component {
  constructor(props) {
    super(props);

    this.state = {
      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}
      />
    );
  }
}

AppRegistry.registerComponent('BarcodeScannerExampleApp', () => BarcodeScannerExampleApp);

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

s-rajaraman / react-native-barcodescanner Goto Github PK