Android手机获取IP地址的两种方法

<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) ; 
     }  

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

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; 
    }