BLE 设备用户定义名称存储在设备的广播包（Advertising Packet）中的 Local Name 字段中。可以使用以下代码示例来获取 BLE 设备的 Local Name：

private BluetoothAdapter.LeScanCallback mLeScanCallback =
        new BluetoothAdapter.LeScanCallback() {
    @Override
    public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {

        // Parse the advertising packet
        AdvertiseData data = AdvertiseData.parseFromBytes(scanRecord);

        // Get the local name
        String localName = data.getDeviceName();

        // Do something with the local name
        Log.d(TAG, "Found device with local name: " + localName);
    }
};