Handler MAIN_THREAD_HANDLER = new Handler(Looper.getMainLooper());
MAIN_THREAD_HANDLER .post(new Runnable() {
@Override
public void run() {
   if (!containtsBluetoothDevice(device, bleIblazrDevices)) {
       device.connectGatt(context, false, btg);
       bluetoothAdapter.stopLeScan(scanCallback);
   }
});