I am making a Client Server application for my Android
phone.
I have created a UDP
Server in Python
which sits and listens for connections.
I can put either the server IP
address in directly like 192.169.0.100
and it sends data fine. I can also put in 192.168.0.255
and it find the server on 192.169.0.100
.
Is it possible to get the broadcast address of the network my Android phone is connected to? I am only ever going to use this application on my Wifi
network or other Wifi
networks.
Cheers
From
private InetAddress getBroadcastAddress() throws IOException {
WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
DhcpInfo dhcp = wifi.getDhcpInfo();
// handle null somehow
int broadcast = (dhcp.ipAddress & dhcp.netmask) | ~dhcp.netmask;
byte[] quads = new byte[4];
for (int k = 0; k < 4; k++)
quads[k] = (byte) (broadcast >> (k * 8));
return InetAddress.getByAddress(quads);
}
This has the advantage of only looking at WIFI. I know OP said "I am only ever going to use this application on my Wifi network or other Wifi networks." but it's worth mentioning this in case someone else needs a non-wifi alternative.