How to detect when WIFI Connection has been established in Android?

Question

I need to detect when I have network connectivity over WIFI. What broadcast is sent to establish that a valid network connection has been made. I need to validate that a v

Answer 1

You can start a wifi connection if you give the user a choice to override the normal behavior of asking each time.

I choose to use three methods...

public boolean isOnline() 
{
 ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
 NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
 return (networkInfo != null && networkInfo.isConnected());
}  

This is quick check if there is an internet connect either Wifi or CellData. From here you can choose what action you want to take. Is it in Airplane mode needs to be checked also.

On a separate thread. I set a variable IpAddress to = " " And poll until I have a valid an ip address.

  WifiManager wifi;
  wifi = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
  WifiInfo wifiInfo = wifi.getConnectionInfo();
  int ipAddress = wifiInfo.getIpAddress();
  String ip = null;
  ip = String.format("%d.%d.%d.%d",
  (ipAddress & 0xff),
  (ipAddress >> 8 & 0xff),
  (ipAddress >> 16 & 0xff),
  (ipAddress >> 24 & 0xff));
  Log.e(" >>IP number Begin ",ip);

Another code snippet... If its not on turn it on (with users prior permission)

   if(wifi.isWifiEnabled()!=true)wifi.setWifiEnabled(true);