一：创建json 文件 放在 ./data/目录下

{
"employees": [
{
"FamilyName": "张",
"giveName": "三",
"salary": 1
},
{
"FamilyName": "李",
"giveName": "四",
"salary": 2
},
{
"FamilyName": "王",
"giveName": "二",
"salary": 3
}
]
}

二：在index.android.js文件中读取

import React,{ Component } from 'react';
import {
  AppRegistry,StyleSheet,Image,Text,TouchableHighlight,TextInput,StatusBar,View
} from 'react-native';
import constantData from './data/SimpleSample.json';

export default class ViewProject extends Component {

     _onChangeText(newText) {
        console.log('inputed text:' + newText);
    }

    componentWillMount() {
    console.log("constantData  taype is ="+typeof(constantData));
    console.log("employees  taype is ="+typeof(constantData.employees));
    console.log("employees  length = "+constantData.employees.length);
    console.log("No.1 givenName ="+constantData.employees[0].giveName);
    console.log("No.1 FamilyName ="+constantData.employees[0].giveName);
    console.log("No.1 Salary"+constantData.employees[0].salary);
    console.log("type of No.1 Salary"+typeof(constantData.employees[0].salary));
    }

  render() {
    return (
      <View style={styles.container}>
        <Text
          onChangeText={(newText)=>{this._onChangeText(newText)}}
        />
      </View>
    );
  }


}



const styles = StyleSheet.create({
  container: {
    flex:1,justifyContent: 'center',alignItems: 'center',backgroundColor:'#F5FCFF'
  }
});
AppRegistry.registerComponent('ViewProject',() => ViewProject);