一：建立json 檔案  放在  ./data/目錄下

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

二：在index.android.js檔案中讀取

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);