public ScanLimitModelManager 自循环扫描() {
   wifiScanManager.自循环扫描();
   if (scanLimitModelManager == null) {
     scanLimitModelManager = new ScanLimitModelManager(wifiScanManager, databaseManager);
   }
   return scanLimitModelManager;
 }
 public LocatorRunController(Activity activity) {
   if (databaseManager == null) {
     databaseManager = new DatabaseManager(activity);
   }
   if (wifiScanManager == null) {
     wifiScanManager = new WifiScanManager(activity);
     wifiScanManager.setOnGotWifiResultListener(
         new OnGotWifiResultListener() {
           @Override
           public void getScanResult(List<Wifi> wifis) {
             databaseManager.add(wifis);
           }
         });
   }
 }