onRefresh.js

  onRefresh() {
    this.setState({ isRefreshing: true }); // true isRefreshing flag for enable pull to refresh indicator
    const url = `https://api.stackexchange.com/2.2/users?page=1&order=desc&sort=reputation&site=stackoverflow`;
    axios.get(url)
      .then(res => {
        let data = res.data.items
        this.setState({ isRefreshing: false, data: data }) // false isRefreshing flag for disable pull to refresh indicator, and clear all data and store only first page data
      })
      .catch(error => {
        this.setState({ isRefreshing: false, error: 'Something just went wrong' }) // false isRefreshing flag for disable pull to refresh
      });
  }