How to use

/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/

``js
import React, { Component } from 'react';
import {
Platform,
StyleSheet,
Text,
View,
NativeModules,
DeviceEventEmitter
} from 'react-native';

const instructions = Platform.select({
ios: 'Press Cmd+R to reload,\n' +
'Cmd+D or shake for dev menu',
android: 'Double tap R on your keyboard to reload,\n' +
'Shake or press menu button for dev menu',
});

type Props = {};
export default class App extends Component {
componentDidMount(){
DeviceEventEmitter.addListener('onScanningResult',this.onScanningResult);
}
onScanningResult = (e)=> {
alert("监听触发啦")
console.log(e.result);
// DeviceEventEmitter.removeListener('onScanningResult',this.onScanningResult);//移除扫描监听
}
log(){
// NativeModules.BGNativeModuleExample.testPrint("Jack", {
// height: '1.78m',
// weight: '7kg'
// });
NativeModules.BGNativeModuleExample.testToast("aa")
}
callback(){
NativeModules.BGNativeModuleExample.getNativeClass(name => {
console.log("nativeClass: ", name);
alert(name)
});
}
promiseBack(){
NativeModules.BGNativeModuleExample.testPromises(false)
.then(result => {
alert("ok")
console.log("result is ", result);
})
.catch(result => {
alert("no")
console.log("result = ", result);
});
}
androidFinal(){
// alert(NativeModules.BGNativeModuleExample.BGModuleName)
alert(NativeModules.BGNativeModuleExample.c)
}
render() {
return (


Welcome to React Native!


To get started, edit App.js


{instructions}

this.log()}>点击
this.callback()}>回调函数
this.promiseBack()}>Promise回调
this.androidFinal()}>常量

);
}
}

const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
});

``
注释：添加module时候的build.gradle的SDK要和主工程的SDK相同最好