<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>  

其次，代碼如下

復(fù)制代碼代碼如下:

public void onCreate(Bundle savedInstanceState) {  

        super.onCreate(savedInstanceState);  

        setContentView(R.layout.main);  

        //獲取wifi服務(wù)  

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

        //判斷wifi是否開(kāi)啟  

        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) ;  

     }

2.使用GPRS

首先，設(shè)置用戶上網(wǎng)權(quán)限

復(fù)制代碼代碼如下:

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

其次，代碼如下

復(fù)制代碼代碼如下:

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("WifiPreference IpAddress", ex.toString());  

        }  

        return null;  

    }