android连接wifi时获取广播地址代码

private InetAddress getBroadcastAddress() throws IOException { 
WifiManager myWifiManager = (WifiManager) getSystemService(WIFI_SERVICE); 
DhcpInfo myDhcpInfo = myWifiManager.getDhcpInfo(); 
if (myDhcpInfo == null) { 
System.out.println("Could not get broadcast address"); 
return null; 
} 
int broadcast = (myDhcpInfo.ipAddress & myDhcpInfo.netmask) 
| ~myDhcpInfo.netmask; 
byte[] quads = new byte[4]; 
for (int k = 0; k < 4; k++) 
quads[k] = (byte) ((broadcast >> k * 8) & 0xFF); 
return InetAddress.getByAddress(quads); 
}