如何在React Native上获取设备的ip？

 import android.content.Context;

 import android.net.wifi.WifiInfo;

 import android.net.wifi.WifiManager;

 import com.facebook.react.bridge.ReactApplicationContext;

 import com.facebook.react.bridge.ReactContextBaseJavaModule;

 import com.facebook.react.bridge.ReactMethod;

 public class DeviceInfoModule extends ReactContextBaseJavaModule {

     private final ReactApplicationContext reactContext;

     public DeviceInfoModule(ReactApplicationContext reactContext) {

         super(reactContext);

         this.reactContext = reactContext;

     }

     @Override

     public String getName() {

         return "DeviceInfo";

     }

     @ReactMethod

     public void getIPAddress(Callback callback) {

         WifiManager wifiManager = (WifiManager) reactContext.getApplicationContext().getSystemService(Context.WIFI_SERVICE);

         WifiInfo wifiInfo = wifiManager.getConnectionInfo();

         int ipAddress = wifiInfo.getIpAddress();

         String ip = String.format("%d.%d.%d.%d",

                 (ipAddress & 0xff),

                 (ipAddress >> 8 & 0xff),

                 (ipAddress >> 16 & 0xff),

                 (ipAddress >> 24 & 0xff));

         callback.invoke(ip);

     }

 }

 ```

 import com.facebook.react.ReactPackage;

 import com.facebook.react.bridge.NativeModule;

 import com.facebook.react.bridge.ReactApplicationContext;

 import com.facebook.react.uimanager.ViewManager;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.List;

 public class DeviceInfoPackage implements ReactPackage {

     @Override

     public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {

         List<NativeModule> modules = new ArrayList<>();

         modules.add(new DeviceInfoModule(reactContext));

         return modules;

     }

     @Override

     public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {

         return Collections.emptyList();

     }

 }

 ```

 // ...

 @Override

 protected List<ReactPackage> getPackages() {

     @SuppressWarnings("UnnecessaryLocalVariable")

     List<ReactPackage> packages = new PackageList(this).getPackages();

     packages.add(new DeviceInfoPackage()); // 添加DeviceInfoPackage

     return packages;

 }

 ```