Android access to IP address implementation method _android

Android Get IP Address

Recently done project, there is a demand is the Android device to obtain the current IP function, after a query to solve the data, record the implementation method.

1. Using WiFi

Set user Permissions First

<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>

Second, the code is as follows

public void OnCreate (Bundle savedinstancestate) {

    super.oncreate (savedinstancestate);

    Setcontentview (r.layout.main);

    

    Get WIFI service

    wifimanager Wifimanager = (wifimanager) getsystemservice (context.wifi_service);

    Determine if WiFi is open 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) ;> & 0xFF) + "." +   

    (I >> & 0xFF);

   } 

2. Using GPRS

First, set the user access rights

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

Second, the code is as follows

Public String getlocalipaddress ()

  {

    try

    {

      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;

  }

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