content: import React, { Component } from 'react';
  import { View, Text } from 'react-native';
  import Contacts from 'react-native-contacts';
  
  export default class Contact extends Component {
    componentDidMount() {
      Contacts.getAll((err, contacts) => {
        if(err && err.type === 'permissionDenied'){
          // x.x
        } else {
          alert(JSON.stringify(contacts));
        }
      })
    }
    render() {
      return (
        <View>
          <Text>I am contact page.</Text>
        </View>
      );
    }
  }
  