因此，我需要获取用户的网络IPV4地址。这是我的以下代码和我用来获取IPV4地址的库。它们都不起作用。

import React, { useState } from 'react'
import { Text, View, Button } from 'react-native'
import axios from 'axios';
import * as Network from 'expo-network';
import NetInfo from "@react-native-community/netinfo";
import { NetworkInfo } from "react-native-network-info";
import DeviceInfo from 'react-native-device-info';
import publicIP from 'react-native-public-ip';

const App = () => {
  const [ipAddress, setIPAddress] = useState('');

  //react-native-network-info
  NetworkInfo.getIPV4Address().then(ipv4Address => {
    console.log(ipv4Address);
    setIPAddress(ipv4Address);
  });

  //react-native-device-info
  const getIpAddress = async () => {
    const ip = await DeviceInfo.getIpAddress();
    console.log(ip);
    setIPAddress(ip);
  };

  //react-native-public-ip
  publicIP()
    .then(ip => {
    console.log(ip);
    setIPAddress(ip);
    });

  //@react-native-community/netinfo
  NetInfo.fetch().then(state => {
    console.log("Connection type", state.type);
    console.log("Is connected?", state.isConnected);
  });

  //axios
  const getData = async () => {
    const res = await axios.get('https://geolocation-db.com/json/')
    console.log(res.data);
    setIPAddress(res.data.IPv4)
  };

  //expo-network
  const ipAlert = async () => {
    const ip = await Network.getIpAddressAsync()
    setIPAddress(ip);
  };

  return (
     <View style={{ top: 200 }}>
        <Text style={{ textAlign: 'center', fontSize: 20 }}>{ipAddress}</Text>
        <Button title='GET IP' onPress={getIpAddress} />
     </View>
   )
};

export default App;

正如你所看到的，我的代码已经尝试了所有的可能性。当我运行代码时，我要么得到公共IP地址，要么得到错误
错误：不变量冲突：无法调用JavaScript模块方法AppRegistry.runApplication（）。模块尚未注册为可调用。已注册的可调用JavaScript模块（n = 11）：Systrace、JSTimers、HeapCapture、SamplingProfiler、RCTLog、RCTDeviceEventEmitter、RCTNativeAppEventEmitter、GlobalPerformanceLogger、JSDevSupportModule、HMRClient、RCTEventEmitter。错误的常见原因是应用程序项目档案路径不正确。当JS配套损毁或载入React Native时发生早期初始化错误时，也会发生这种情况。
如有任何帮助，不胜感激。
：）
顺便说一句，我分别试了每一个，而不是全部一起。