const baseUrl = 'http://services.odata.org/V4/TripPinService/People';
const query = { filter: { FirstName: 'Russell' } };

<OData baseUrl={baseUrl} query={query}>
  { ({ loading, error, data }) => (
    <div>
      { loading && {/* handle loading here */} }
      { error && {/* handle error here */} }
      { data && {/* handle data here */}}
    </div>
  )}
</OData>

import React, { Component } from 'react';
import {
  Text,
  View,
  ScrollView
} from 'react-native';
import { List, ListItem } from 'react-native-elements';

import OData from 'react-odata';
const baseUrl = 'http://PRIVATE/odata/Products';
// according to the code in odata.js we use false to send no options
// I also tried using { filter: { ProductId: 1 } };
// I also tried using { filter: { ProductId: '1' } };
const query = false;

class ProductList extends Component {
  onLearnMore = (user) => {
    this.props.navigation.navigate('Details', { ...user });
  };

  render() {
    return (
      <ScrollView>
        <OData baseUrl={baseUrl} query={query}>
          {({ loading, error, data }) => (
            <View style={{ height: 400 }}>
              <Text>HI THERE!!</Text>
              {loading && <Text>Loading...</Text>}
              {error && <Text>error...</Text>}
              {data &&
                <List>
                  <ListItem
                    key="1234"
                    title="Sample Item" />
                  <ListItem
                    key="1235"
                    title="Smaple Item 2" />
                  {data.map((product) => (
                    <ListItem
                      key={product.ProductId}
                      title={`${product.ItemCode}`}
                    />
                  ))}
                </List>
              }
            </View>
          )}
        </OData>
      </ScrollView>
    );
  }
}

export default Feed;

componentWillMount() {
   alert('fetching');
   fetch(baseUrl)
      .then((response) => response.json())
      .then((responseJson) => {
         alert('returned ' + responseJson.value[0].ItemCode);
         return responseJson.value
      })
      .catch((error) => { console.error(error) });
}