Android高手进阶教程(十一)--Android 通用获取Ip的方法(判断手机是否联网的方法)

大家好，我们这一节讲一下，Android获取Ip的一些方法,在我们开发中，有判断手机是否联网，或者想获得当前手机的Ip地址，当然WIFI连接的和

我们3G卡的Ip地址当然是不一样的.

首先我尝试了如下方法:

 

 WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
 WifiInfo wifiInfo = wifiManager.getConnectionInfo();
 int    ipAddress = wifiInfo.getIpAddress();

 WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
 WifiInfo wifiInfo = wifiManager.getConnectionInfo();
 int  ipAddress = wifiInfo.getIpAddress();

WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE); WifiInfo wifiInfo = wifiManager.getConnectionInfo(); int ipAddress = wifiInfo.getIpAddress();

但是获得的居然是一个整数，我尝试了用些数学方法都没有成功!,所以这种方法不可取!

最后查了一些资料，发现如下方法是比较通用的，我尝试了WIFI和G3卡，都获取了争取的Ip地址:代码如下:

 

 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(LOG_TAG, ex.toString());
     }
      return     null   ;
 }

 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(LOG_TAG, ex.toString());
     }
     return   null ;
 }

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(LOG_TAG, ex.toString()); } return null; }

当我的手机处于飞行状态是，获得Ip地址为空，刚好符合要求!!!

希望对大家有所帮助!谢谢~