Bluetooth가 off 되었어도 스캔할 수 있는 방법

    mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);

    mBluetoothAdapter = mBluetoothManager.getAdapter();

    // 리플랙션
    try {
        Method method = mBluetoothAdapter.getClass().getMethod("enableBLE");
        boolean result = (Boolean) method.invoke(mBluetoothAdapter);
        Log.d(TAG, ">> " +result);
    } catch (Exception e){
        Log.e(TAG, e.getMessage());
    }

    // 스캔
    mBluetoothAdapter.startLeScan(null, mLeScanCallback);