关于android Ip地址的获取

1.如果使用WIFI可以用android自带的类来获取IP

首先设置用户权限

<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，代码如下   

1. public void onCreate(Bundle savedInstanceState) {  
2.         super.onCreate(savedInstanceState);  
3.         setContentView(R.layout.main);  
4.           
5.         //获取wifi服务  
6.         WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);  
7.         //判断wifi是否开启  
8.         if (!wifiManager.isWifiEnabled()) {   
9.         wifiManager.setWifiEnabled(true);     
10.         }   
11.         WifiInfo wifiInfo = wifiManager.getConnectionInfo();        
12.         int ipAddress = wifiInfo.getIpAddress();    
13.         String ip = intToIp(ipAddress);    
14.         EditText et = (EditText)findViewById(R.id.EditText01);  
15.         et.setText(ip);  
16.     }      
17.     private String intToIp(int i) {        
18.           
19.           return (i & 0xFF ) + "." +        
20.         ((i >> 8 ) & 0xFF) + "." +        
21.         ((i >> 16 ) & 0xFF) + "." +        
22.         ( i >> 24 & 0xFF) ;  
23.      }

2.java方法：这时相当于是用的java的类来获取ip，其实这个不仅可以获得GPRS的，wifi的一样能够获取！   

首先，设置用户上网权限     

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

其次，代码如下     

1. public String getLocalIpAddress()   
2.     {   
3.         try   
4.         {   
5.             for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();)   
6.             {   
7.                NetworkInterface intf = en.nextElement();   
8.                for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();)   
9.                {   
10.                    InetAddress inetAddress = enumIpAddr.nextElement();   
11.                    if (!inetAddress.isLoopbackAddress())   
12.                    {   
13.                        return inetAddress.getHostAddress().toString();   
14.                    }   
15.                }   
16.            }   
17.         }   
18.         catch (SocketException ex)   
19.         {   
20.             Log.e("WifiPreference IpAddress", ex.toString());   
21.         }   
22.         return null;   
23.     }   

3.可以通过创建一个socket，通过socket来获取本地的IP地址。

try{

        Socket socket = new Socket("www.baidu.com", 80);

        Log.i("", socket.getLocalAddress().toString());)}

        catch(Exception e){

                Log.i("",e.getMessage());

}

 

 

 

 

总之其实完全可以通过下面这个完整的文件来实现以上三个方法：

 

import java.net.InetAddress;

import java.net.NetworkInterface;

import java.net.Socket;

import java.util.Enumeration;

 

import android.app.Activity;

import android.net.wifi.WifiInfo;

import android.net.wifi.WifiManager;

import android.os.Bundle;

import android.text.format.Formatter;

import android.widget.EditText;
import android.widget.TextView;

 

public class IpAddressgetActivity extends Activity{

   

   //private TextView mText;

   

   @Override

   public void onCreate(Bundle savedInstanceState){

       super.onCreate(savedInstanceState);

       setContentView(R.layout.main);

       EditText et =(EditText)findViewById(R.id.edittext01);

       String ip = null;

       

       //Method 1

       WifiManager wifiManager = (WifiManager)getSystemService(WIFI_SERVICE);

       WifiInfo info =wifiManager.getConnectionInfo();

       ip = "wifiInfo :" +Formatter.formatIpAddress(info.getIpAddress());

       ip += "\n";

       

       //Method 2

       try{

           Socket socket = new Socket("10.40.73.41", 80);

           ip += "socket : " + socket.getLocalAddress().toString() +"\n";

       } catch (Exception e) {

           e.printStackTrace();

           //throw new RuntimeException();

       }

       

       //Method 3

       try {

           Enumeration<NetworkInterface>interfaces =NetworkInterface.getNetworkInterfaces();

           NetworkInterface inf =interfaces.nextElement();

           for (Enumeration<InetAddress>enumAddress =inf.getInetAddresses();enumAddress.hasMoreElements();){

               InetAddress in = enumAddress.nextElement();

               if(!in.isLinkLocalAddress()) {

                   ip += "NetworkInterface : " + in.getHostAddress() +"\n";

               }

           }

       }catch (Exception e) {

           e.printStackTrace();

           //throw new RuntimeException();

       }

       

       et.setText(ip);

   }

}