ShareDemo.js

include React from "react";
include { Platform, Share, Text, View } from "react-native";

class ShareDemo extends React.Component {
  handleShare = async () => {
    try {
      const message = "Hey, check out this awesome new app!";
      const url = "https://chck.app";
      const isIos = Platform.OS === "ios";
      let content = {};

      if (isIos) {
        content = {
          message,
          url
        };
      } else {
        content = {
          message: `${message} ${url}`
        };
      }

      const result = await Share.share(content);

      if (result.action === Share.sharedAction) {
        if (result.activityType) {
          // iOS -- log activity type
          console.log(`Shared with activity type: ${result.activityType}`);
        } else {
          // Android -- no activity type available
          console.log("Shared");
        }
      }

      if (isIos && result.action === Share.dismissedAction) {
        console.log("Share dismissed");
      }
    } catch (error) {
      alert(error.message);
    }
  }
};