rtt_receiver.java

mRttBroadcastReceiver = new BroadcastReceiver() {
@Override public void onReceive(Context context, Intent intent)
{
  try
  {
    for (ScanResult scanResult: mWifiManager.getScanResults())
    {
      if (scanResult.is80211mcResponder())
      {
        RangingRequest.Builder rB = new RangingRequest.Builder();
        rB.addAccessPoint(scanResult);
        
        WifiRttManager rttManager = (WifiRttManager) mContext.getSystemService(Context.WIFI_RTT_RANGING_SERVICE);
        
        RangingResultCallback callback = mCallback; // your callback is here
        
        rttManager.startRanging(rangingRequestBuilder.build(),
                                mContext.getMainExecutor(),
                                callback);
        }
      }
    }
    catch (Throwable e) { }
  }
};
mContext.registerReceiver(mWifiBroadcastReceiver, newIntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));