Listening Wifi State

I want to set listener to listen on wireless state,can anyone help me with my code import android.telephony.PhoneStateListener; import android.telephony.TelephonyManager; ... Tel

Solution 1:

I came across that problem too, here's how I solved it.

In my activity onCreate(..) I did

this.registerReceiver(mWifiStateChangedReceiver,newIntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION));

and additionally i created the member 'mWifiStateChangedReceiver' this way

privateBroadcastReceivermWifiStateChangedReceiver=newBroadcastReceiver()
{

    @OverridepublicvoidonReceive(Context context, Intent intent)
    {
        // TODO Auto-generated method stubintextraWifiState= intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN);

        switch (extraWifiState)
        {
        case WifiManager.WIFI_STATE_DISABLED:
        case WifiManager.WIFI_STATE_DISABLING:
            enableUI(false);
            break;
        case WifiManager.WIFI_STATE_ENABLED:
            ConnectivityManagerconMan= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
            while(conMan.getActiveNetworkInfo() == null || conMan.getActiveNetworkInfo().getState() != NetworkInfo.State.CONNECTED)
            {
                try
                {
                    Thread.sleep(500);
                } catch (InterruptedException e)
                {
                    e.printStackTrace();
                }
            }
            update();
            enableUI(true);
            break;
        case WifiManager.WIFI_STATE_ENABLING:
            break;
        case WifiManager.WIFI_STATE_UNKNOWN:
            break;
        }

    }
};

As you can see, when I get WifiManager.WIFI_STATE_ENABLED I additionally test if the network is really connected, because a enabled WiFi doesn't mean it's connected. At least this was my guess, that's why I'm waiting till the network is really connected.

Solution 2:

If you want to listen to signal strength you can also listen at:

WifiManager.RSSI_CHANGED_ACTION

Solution 3:

The android system asks to switch to Data Traffic when WiFi is not connected but there is an issue. If you turn off WiFi when screen is off, it will constantly change between WiFi and 3G network and if you have selected apps to send data in the background, it will use the data connection which is costlier if you don't have unlimited data plan. Another issue is when you are in a area with not so strong WiFi signal, it will constantly change to Data Traffic and you will have issues with browsing or whatever. Third issue is battery as from what I've heard it's better(battery wise) to use the WiFi connection than the data, with one Add-on don't turn off WiFi when the screen is off.(even, I do so)because turning it off and on WiFi is most costly(battery) that to be always On. so therefore leave it to the android system.