Android :: Android / How To Monitor WiFi Signal Strength

I would receive notifications when signal strength changes. I tried to create the following method and call it in the on Create():
private void initializeWiFiListener(){
Log.i(TAG, "executing initializeWiFiListener");
String connectivity_context = Context.WIFI_SERVICE;
final WifiManager wifi = (WifiManager)getSystemService(connectivity_context);
if(!wifi.isWifiEnabled()){
if(wifi.getWifiState() != WifiManager.WIFI_STATE_ENABLING){
wifi.setWifiEnabled(true);}}
register Receiver(new BroadcastReceiver(){@Override
public void onReceive(Context context, Intent intent) {
WifiInfo info = wifi.getConnectionInfo();
//TODO: implement methods for action handling}
new IntentFilter(WifiManager.RSSI_CHANGED_ACTION));}