title: react-native scrollview doesn't scroll
body: <p>I can't seem to figure out why a screen in my Android app doesn't scroll at all in the Android emulator.  Here's my code:</p>
  
  <pre><code>import React, { Component } from 'react';
  import Dimensions from 'Dimensions';
  
  import {
    Text,
    ScrollView,
    View,
    TouchableHighlight,
    StyleSheet
  } from 'react-native';
  
  
  const win = Dimensions.get('window');
  
  class DeficiencyItem extends Component {
  
      render() {
          const touchable = {
                  width:win.width/2-20,
                  height:230,
                  backgroundColor:'red',
                };
          return (
              &lt;TouchableHighlight style={touchable}&gt;
                  &lt;View&gt;
                      &lt;Text&gt;Item Here&lt;/Text&gt;
                  &lt;/View&gt;
              &lt;/TouchableHighlight&gt;
          );
    }
  }
  
  export default class Items extends Component {
    static navigationOptions = {title:'hey'};
  
      constructor(props)
      {
          super(props);
      }
  
      render() {
  
          let deficiencies = [];
          for(let x = 0; x&lt;12;x++)
          {
              let row = &lt;DeficiencyItem key={x} /&gt;;
              deficiencies.push(row);
          }
          return (
              &lt;View style={{flex:1}}&gt;
                &lt;ScrollView style={{
                  margin:5,
                  flexWrap: 'wrap',
                  flexDirection:'row',
                }}&gt;
                 {deficiencies}
                &lt;/ScrollView&gt;
              &lt;/View&gt;
          );
    }
  }
  </code></pre>
  
  <p>There are items exceeding the bottom limit of the view port.  But touch drag to scroll in the emulator does nothing.  What did I do wrong?</p>