虽然有一个正确的答案，我在这里分享我的答案，希望这样会更方便。

WifiManager wifiMan = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInf = wifiMan.getConnectionInfo();
int ipAddress = wifiInf.getIpAddress();
String ip = String.format("%d.%d.%d.%d", (ipAddress & 0xff),(ipAddress >> 8 & 0xff),(ipAddress >> 16 & 0xff),(ipAddress >> 24 & 0xff));

虽然有一个正确的答案，我在这里分享我的答案，希望这样会更方便。

WifiManager wifiMan = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInf = wifiMan.getConnectionInfo();
int ipAddress = wifiInf.getIpAddress();
String ip = String.format("%d.%d.%d.%d", (ipAddress & 0xff),(ipAddress >> 8 & 0xff),(ipAddress >> 16 & 0xff),(ipAddress >> 24 & 0xff));

这是互联网上最简单的方法…… 首先，将此权限添加到您的manifest文件中…

“互联网” “ACCESS_NETWORK_STATE”

将此添加到Activity的onCreate文件中。

getPublicIP（）;

现在将这个函数添加到MainActivity.class中。

private void getPublicIP() { ArrayList<String> urls=new ArrayList<String>(); //to read each line new Thread(new Runnable(){ public void run(){ //TextView t; //to show the result, please declare and find it inside onCreate() try { // Create a URL for the desired page URL url = new URL("https://api.ipify.org/"); //My text file location //First open the connection HttpURLConnection conn=(HttpURLConnection) url.openConnection(); conn.setConnectTimeout(60000); // timing out in a minute BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream())); //t=(TextView)findViewById(R.id.TextView1); // ideally do this in onCreate() String str; while ((str = in.readLine()) != null) { urls.add(str); } in.close(); } catch (Exception e) { Log.d("MyTag",e.toString()); } //since we are in background thread, to post results we have to go back to ui thread. do the following for that PermissionsActivity.this.runOnUiThread(new Runnable(){ public void run(){ try { Toast.makeText(PermissionsActivity.this, "Public IP:"+urls.get(0), Toast.LENGTH_SHORT).show(); } catch (Exception e){ Toast.makeText(PermissionsActivity.this, "TurnOn wiffi to get public ip", Toast.LENGTH_SHORT).show(); } } }); } }).start(); }

如果你有一个壳;Ifconfig eth0也适用于x86设备

kotlin语言。

fun contextIP(context: Context): String {
    val wm: WifiManager = context.getSystemService(Context.WIFI_SERVICE) as WifiManager
    return Formatter.formatIpAddress(wm.connectionInfo.ipAddress)
}

下面的代码可能会帮助你..不要忘记添加权限..

public String getLocalIpAddress(){
   try {
       for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();  
       en.hasMoreElements();) {
       NetworkInterface intf = en.nextElement();
           for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
           InetAddress inetAddress = enumIpAddr.nextElement();
                if (!inetAddress.isLoopbackAddress()) {
                return inetAddress.getHostAddress();
                }
           }
       }
       } catch (Exception ex) {
          Log.e("IP Address", ex.toString());
      }
      return null;
}

在清单文件中添加以下权限。

 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

编码快乐! !