推荐项目：React Native NetInfo

React Native NetInfo是一个API，它可以让你检查设备的网络状态，比如网络是否可用，是否是频繁变换网络，以及当前网络的类型等。

以下是一些使用React Native NetInfo的方法：

1. 检查网络状态

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

2. 监听网络状态变化

import { NetInfo } from "react-native";
 
const unsubscribe = NetInfo.addEventListener(state => {
  console.log("Connection type", state.type);
  console.log("Is connected?", state.isConnected);
});
 
// 用于停止监听
unsubscribe();

3. 检查网络类型

import { NetInfo } from "react-native";
 
NetInfo.fetch().then(state => {
  switch (state.type) {
    case "none":
      console.log("No network connection available.");
      break;
    case "wifi":
      console.log("Connected to WiFi network.");
      break;
    case "cellular":
      console.log("Connected to cellular network.");
      break;
    case "unknown":
      console.log("Network connection is unknown.");
      break;
  }
});

以上就是一些使用React Native NetInfo的基本方法，具体使用哪种方法，可以根据你的实际需求来决定。