react-native-smart-barcode

A smart barcode scanner component for React Native app. The library uses https://github.com/zxing/zxing to decode the barcodes for android, and also supports ios.

Preview

Installation

npm install react-native-smart-barcode --save

Notice

It can only be used greater-than-equal react-native 0.4.0 for ios, if you want to use the package less-than react-native 0.4.0, use npm install [email protected] --save

Installation (iOS)

• Drag RCTBarCode.xcodeproj to your project on Xcode.

• Click on your main project file (the one that represents the .xcodeproj) select Build Phases and drag libRCTBarCode.a from the Products folder inside the RCTBarCode.xcodeproj.

• Look for Header Search Paths and make sure it contains $(SRCROOT)/../../../react-native/React as recursive.

• Dray raw folder to your project

• Add Privacy - Camera Usage Description property in your info.plist(for ios 10)

Installation (Android)

• In android/settings.gradle

...
include ':react-native-smart-barcode'
project(':react-native-smart-barcode').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-smart-barcode/android')

• In android/app/build.gradle

...
dependencies {
    ...
    // From node_modules
    compile project(':react-native-smart-barcode')
}

• In MainApplication.java

...
private ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
    //  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
    @Override
    protected boolean getUseDeveloperSupport() {
      return BuildConfig.DEBUG;
    }

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

  public void setReactNativeHost(ReactNativeHost reactNativeHost) {
    mReactNativeHost = reactNativeHost;
  }

  @Override
  public ReactNativeHost getReactNativeHost() {
    return mReactNativeHost;
  }
...

• In MainActivity.java

...
import com.reactnativecomponent.barcode.RCTCapturePackage;    //import RCTCapturePackage
...
@Override
protected void onCreate(Bundle savedInstanceState) {
    MainApplication application = (MainApplication) this.getApplication();
    application.setReactNativeHost(new ReactNativeHost(application) {
        @Override
        protected boolean getUseDeveloperSupport() {
            return BuildConfig.DEBUG;
        }

        @Override
        protected List<ReactPackage> getPackages() {
            return Arrays.<ReactPackage>asList(
                    new MainReactPackage(),
                    new RCTCapturePackage(MainActivity.this)    //register Module
            );
        }

    });

    super.onCreate(savedInstanceState);
}

• In AndroidManifest.xml, add camera permissions

...
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.VIBRATE"/>

<uses-feature android:name="android.hardware.camera"/>
<uses-feature android:name="android.hardware.camera.autofocus"/>
...

Full Demo

see ReactNativeComponentDemos

Usage

Install the package from npm with npm install react-native-smart-barcode --save. Then, require it from your app's JavaScript files with import Barcode from 'react-native-smart-barcode'.

import React, {
    Component,
} from 'react'
import {
    View,
    StyleSheet,
    Alert,
} from 'react-native'

import Barcode from 'react-native-smart-barcode'
import TimerEnhance from 'react-native-smart-timer-enhance'

class BarcodeTest extends Component {

    // 构造
    constructor(props) {
        super(props);
        // 初始状态
        this.state = {
            viewAppear: false,
        };
    }

    render() {

        return (
            <View style={{flex: 1, backgroundColor: 'black',}}>
                {this.state.viewAppear ? <Barcode style={{flex: 1, }}
                                                  ref={ component => this._barCode = component }
                                                  onBarCodeRead={this._onBarCodeRead}/> : null}
            </View>
        )
    }

    componentDidMount() {
        let viewAppearCallBack = (event) => {
            this.setTimeout( () => {
                this.setState({
                    viewAppear: true,
                })
            }, 255)

        }
        this._listeners = [
            this.props.navigator.navigationContext.addListener('didfocus', viewAppearCallBack)
        ]

    }

    componentWillUnmount () {
        this._listeners && this._listeners.forEach(listener => listener.remove());
    }

    _onBarCodeRead = (e) => {
        console.log(`e.nativeEvent.data.type = ${e.nativeEvent.data.type}, e.nativeEvent.data.code = ${e.nativeEvent.data.code}`)
        this._stopScan()
        Alert.alert(e.nativeEvent.data.type, e.nativeEvent.data.code, [
            {text: 'OK', onPress: () => this._startScan()},
        ])
    }

    _startScan = (e) => {
        this._barCode.startScan()
    }

    _stopScan = (e) => {
        this._barCode.stopScan()
    }

}

export default TimerEnhance(BarcodeTest)

Props

Prop | Type | Optional | Default | Description ---------------------- | ------ | -------- | --------- | ----------- barCodeTypes | array | Yes | | determines the supported barcodeTypes scannerRectWidth | number | Yes | 255 | determines the width of scannerRect scannerRectHeight | number | Yes | 255 | determines the height of scannerRect scannerRectTop | number | Yes | 0 | determines the top shift of scannerRect scannerRectLeft | number | Yes | 0 | determines the left shift of scannerRect scannerLineInterval | number | Yes | 3000 | determines the interval of scannerLine's movement scannerRectCornerColor | string | Yes | #09BB0D | determines the color of scannerRectCorner