App.js

import { AppLoading } from "expo";
import { Asset } from "expo-asset";
import * as Font from "expo-font";
import React, { useState } from "react";
import { Platform, StatusBar, StyleSheet, View } from "react-native";
import { Ionicons } from "@expo/vector-icons";
import AppNavigator from "./navigation/AppNavigator";
import { Button, TouchableOpacity, Text } from "react-native";

import * as firebase from "firebase";

const firebaseConfig = {
  apiKey: "AIzaSyAHV3P2L3tquFM8B5NkU_J-HsR4MGW76qo",
  authDomain: "whattodo-e3e8d.firebaseapp.com",
  databaseURL: "https://whattodo-e3e8d.firebaseio.com",
  storageBucket: ""
};

setupStuff = () => {
  firebase
    .database()
    .ref("Category/Arts and Culture/Items/Singapore Art Museum")
    .update({
      Cost: "$20",
      Location: "8 Queen St",
      Rating: 5
    })
    .then(data => {
      //success callback
      console.log("data ", data);
    })
    .catch(error => {
      //error callback
      console.log("error ", error);
    });
};
firebase.initializeApp(firebaseConfig);
export default function App(props) {
  const [isLoadingComplete, setLoadingComplete] = useState(false);

  if (!isLoadingComplete && !props.skipLoadingScreen) {
    return (
      <AppLoading
        startAsync={loadResourcesAsync}
        onError={handleLoadingError}
        onFinish={() => handleFinishLoading(setLoadingComplete)}
      />
    );
  } else {
    return (
      <View style={styles.container}>
        {Platform.OS === "ios" && <StatusBar barStyle="default" />}
        <AppNavigator />
        {/* <TouchableOpacity onPress={this.setupStuff} style={styles.Button}>
          <Text>Admin Button</Text>
        </TouchableOpacity> */}
      </View>
    );
  }
}

async function loadResourcesAsync() {
  await Promise.all([
    Asset.loadAsync([
      require("./assets/images/robot-dev.png"),
      require("./assets/images/robot-prod.png")
    ]),
    Font.loadAsync({
      // This is the font that we are using for our tab bar
      ...Ionicons.font,
      // We include SpaceMono because we use it in HomeScreen.js. Feel free to
      // remove this if you are not using it in your app
      "space-mono": require("./assets/fonts/SpaceMono-Regular.ttf"),
      "Gotham-Bold": require("./assets/fonts/Gotham-Bold.ttf"),
      "Gotham-BoldItalic": require("./assets/fonts/Gotham-BoldItalic.ttf"),
      "Gotham-Book": require("./assets/fonts/Gotham-Book.ttf"),
      "Gotham-BookItalic": require("./assets/fonts/Gotham-BookItalic.ttf"),
      "Gotham-Light": require("./assets/fonts/Gotham-Light.ttf"),
      "Gotham-LightItalic": require("./assets/fonts/Gotham-LightItalic.ttf"),
      "Gotham-Medium": require("./assets/fonts/Gotham-Medium.ttf"),
      "Gotham-MediumItalic": require("./assets/fonts/Gotham-MediumItalic.ttf")
    })
  ]);
}

function handleLoadingError(error) {
  // In this case, you might want to report the error to your error reporting
  // service, for example Sentry
  console.warn(error);
}

function handleFinishLoading(setLoadingComplete) {
  setLoadingComplete(true);
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: "#fff"
  },
  Button: {
    flex: 2,
    marginTop: 200,
    padding: 40
  }
});