Android 获取IP地址的实现方法

<uses-permission Android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission><uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission><uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>

public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);        //获取wifi服务    WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);    //判断wifi是否开启    if (!wifiManager.isWifiEnabled()) {    wifiManager.setWifiEnabled(true);     }    WifiInfo wifiInfo = wifiManager.getConnectionInfo();       int ipAddress = wifiInfo.getIpAddress();     String ip = intToIp(ipAddress);     EditText et = (EditText)findViewById(R.id.EditText01);    et.setText(ip);  }    private String intToIp(int i) {            return (i & 0xFF ) + "." +       ((i >> 8 ) & 0xFF) + "." +       ((i >> 16 ) & 0xFF) + "." +       ( i >> 24 & 0xFF) ;   } 

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().toString();          }        }      }    }    catch (SocketException ex)    {      Log.e("WifiPreference IpAddress", ex.toString());    }    return null;  }