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

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

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

其次，代码如下

publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//获取wifi服务
WifiManagerwifiManager=(WifiManager)getSystemService(Context.WIFI_SERVICE);
//判断wifi是否开启
if(!wifiManager.isWifiEnabled()){
wifiManager.setWifiEnabled(true);
}
WifiInfowifiInfo=wifiManager.getConnectionInfo();
intipAddress=wifiInfo.getIpAddress();
Stringip=intToIp(ipAddress);
EditTextet=(EditText)findViewById(R.id.EditText01);
et.setText(ip);
}
privateStringintToIp(inti){
return(i&0xFF)+"."+
((i>>8)&0xFF)+"."+
((i>>16)&0xFF)+"."+
(i>>24&0xFF);
}

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

其次，代码如下

publicStringgetLocalIpAddress()
{
try
{
for(Enumeration<NetworkInterface>en=NetworkInterface.getNetworkInterfaces();en.hasMoreElements();)
{
NetworkInterfaceintf=en.nextElement();
for(Enumeration<InetAddress>enumIpAddr=intf.getInetAddresses();enumIpAddr.hasMoreElements();)
{
InetAddressinetAddress=enumIpAddr.nextElement();
if(!inetAddress.isLoopbackAddress())
{
returninetAddress.getHostAddress().toString();
}
}
}
}
catch(SocketExceptionex)
{
Log.e("WifiPreferenceIpAddress",ex.toString());
}
returnnull;
}

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);

}

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