public List<ScanResult> getWifiScanResults() {
    WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    return wifiManager.getScanResults();
  }
Event pushed to Otto Event Bus when Wifi Signal strength was changed
and list of WiFi Access Points was refreshed
network-events-library/src/main/java/com/github/pwittchen/networkevents/library/event/WifiSignalStrengthChanged.java