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.
For RN >= 0.60
npm install @flyskywhy/react-native-smart-barcode --save
cd ios
pod install
For RN < 0.60
npm install @flyskywhy/[email protected] --save
react-native link @flyskywhy/react-native-smart-barcode
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
For RN < 0.60, need files edited below:
-
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 $(SRCROOT)/../../../react-native/React as recursive.
-
Dray raw folder to your project
-
Add
Privacy - Camera Usage Descriptionproperty in your info.plist(for ios 10)
If got
> A failure occurred while executing com.android.build.gradle.tasks.VerifyLibraryResourcesTask$Action
> Android resource linking failed
ERROR: node_modules/@flyskywhy/react-native-smart-barcode/android/build/intermediates/merged_res/release/values-v26/values-v26.xml:7: AAPT: error: resource android:attr/colorError not found.
you may need add below into YOUR_APP/android/build.gradle:
subprojects {
afterEvaluate {
project ->
if (project.hasProperty("android")) {
android {
compileSdkVersion = rootProject.compileSdkVersion
buildToolsVersion = rootProject.buildToolsVersion
}
}
}
}
For RN < 0.60, need files edited below:
- In
android/settings.gradle
...
include ':react-native-smart-barcode'
project(':react-native-smart-barcode').projectDir = new File(rootProject.projectDir, '../node_modules/@flyskywhy/react-native-smart-barcode/android')
- In
android/app/build.gradle
...
dependencies {
...
// From node_modules
implementation 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"/>
...
Install the package from npm with npm install @flyskywhy/react-native-smart-barcode --save.
Then, require it from your app's JavaScript files with import Barcode from '@flyskywhy/react-native-smart-barcode'.
import React, {
Component,
} from 'react'
import {
View,
StyleSheet,
Alert,
} from 'react-native'
import Barcode from '@flyskywhy/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)| 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 |