text: import React, {Component} from 'react';
  import { createAppContainer } from "react-navigation";
  import {createStackNavigator} from "react-navigation-stack";
  import './App.css';
  import ImageViewer from './ImageViewer.js'
  //import VideoViewer from './VideoViewer.js'
  //import AudioListener from './AudioListener.js'
  import HomePage from './HomePage.js'
  
  
  
  class App extends Component {
    render() 
    {
      return(
        <AppContainer />
      )
    }
  }
  
  
  const AppNavigator = createStackNavigator({
    Home: {
      screen: HomePage
    },
    Image: {
      screen: ImageViewer
    }
  });
  
  
  const AppContainer = createAppContainer(AppNavigator);
  
  export default App
  
  
  
  