App.js

import React, { Component } from 'react';
import ContactsWrapper from 'react-native-contacts-wrapper';
import {
    StyleSheet,
    Text,
    View,
    TouchableOpacity
} from 'react-native';

export default class App extends Component {

    constructor(props) {
        super(props);
        this.onButtonPressed = this.onButtonPressed.bind(this);
    }

    onButtonPressed() {
        ContactsWrapper.getContact()
        .then((contact) => {
            // Replace this code
            console.log(contact);
        })
        .catch((error) => {
            console.log("ERROR CODE: ", error.code);
            console.log("ERROR MESSAGE: ", error.message);
        });
    }

    render() {
        return (
            <View style = {styles.container}>
                <TouchableOpacity onPress = {this.onButtonPressed}>
                    <View style = {styles.buttonWrapper}>
                        <Text style = {styles.buttonText}>Open Contact</Text>
                    </View>
                </TouchableOpacity>
            </View>

        );
    }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#999999',
  },
  buttonWrapper: {
      marginTop: 70,
      marginLeft: 20,
      marginRight:20,
      flexDirection: 'column',
      backgroundColor: '#00CCFF',
      borderRadius: 4
  },
  buttonText: {
      justifyContent: 'center',
      alignSelf: 'center',
      marginTop: 10,
      marginBottom: 10,
      marginHorizontal: 20,
      elevation: 1,
      color: '#FFFFFF'
  }
});