Android IP address with java

Question

I\'m writing an Android video game that supports multiplayer. There is a dedicated server running which the androids connect to when the multiplayer button is clicked by ope

Answer 1

If you just need the IP for the Wifi connection you can retrieve the IP as a 32 bit integer:

WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
int ip = wifiInfo.getIpAddress();

Then, in order to construct the IP in dot-decimal notation; bit-shift and mask the result:

String ipString = String.format(
"%d.%d.%d.%d",
(ip & 0xff),
(ip >> 8 & 0xff),
(ip >> 16 & 0xff),
(ip >> 24 & 0xff));

android.permission.ACCESS_WIFI_STATE permission will be required in the manifest.