App.js

import React, {Component} from 'react';
import * as firebase from 'firebase';
import {AppLoading, Font} from 'expo';
import {LoginNav} from './Router';
import Login from './Login';
import {Root} from "native-base"; // allows for toasts

const firebaseConfig = {
  apiKey: "AIzaSyCEbdjQNZ9IpoOmc5gWAVI4Doq224_JWUg",
  authDomain: "princetonevents-3aeed.firebaseapp.com",
  databaseURL: "https://princetonevents-3aeed.firebaseio.com",
  storageBucket: "princetonevents-3aeed.appspot.com"
};

export const firebaseApp = firebase.initializeApp(firebaseConfig);

class App extends Component {
  state = {
    loaded: false
  }

  componentWillMount() {
    this._loadFontsAsync();
  }

  _loadFontsAsync = async() => {
    await Font.loadAsync({'Roboto': require('native-base/Fonts/Roboto.ttf'),
    'Roboto_medium': require('native-base/Fonts/Roboto_medium.ttf')});

    this.setState({loaded: true});
  }

  render() {
    if (!this.state.loaded) {
      return <AppLoading/>
    }

    return (
        <LoginNav/>
    );
  }
}

export default App;