Android获取WIFI网关地址与子网掩码地址

1. WifiManager wm = (WifiManager)getSystemService(WIFI_SERVICE);  
2. DhcpInfo di = wm.getDhcpInfo();  
3. long getewayIpL=di.gateway;  
4. String getwayIpS=long2ip(getewayIpL);//网关地址  
5. long netmaskIpL=di.netmask;  
6. String netmaskIpS=long2ip(netmaskIpL);//子网掩码地址  
7.   
8. String long2ip(long ip){  
9.     StringBuffer sb=new StringBuffer();  
10.     sb.append(String.valueOf((int)(ip&0xff)));  
11.     sb.append('.');  
12.     sb.append(String.valueOf((int)((ip>>8)&0xff)));  
13.     sb.append('.');  
14.     sb.append(String.valueOf((int)((ip>>16)&0xff)));  
15.     sb.append('.');  
16.     sb.append(String.valueOf((int)((ip>>24)&0xff)));  
17.     return sb.toString();  
18. }  
19.   
20. //注意添加权限  
21. <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>  

Broadcast address:

public static String getBroadcastAddr() {
    DhcpInfo di = wm.getDhcpInfo();    return long2ip((di.ipAddress&di.netmask)|~di.netmask);}
private static String long2ip(long ip){
    StringBuffer sb=new StringBuffer();    sb.append(String.valueOf((int)(ip&0xff)));    sb.append('.');    sb.append(String.valueOf((int)((ip>>8)&0xff)));    sb.append('.');    sb.append(String.valueOf((int)((ip>>16)&0xff)));    sb.append('.');    sb.append(String.valueOf((int)((ip>>24)&0xff)));    return sb.toString();
}