小编cod*_*i14的帖子

我正在尝试使用蓝牙低功耗(BLE)通过Android应用程序连接到Arduino Uno.
我正在开发Android Studio,使用三星Galaxy S4进行测试,使用Android版本5.0.1
我按照以下链接开发:http ://www.truiton.com/2015/04/android-bluetooth-low-energy- ble-example /
我正在扫描设备,当我找到它时,我想在连接它之前得到它的UUID,以确保它是正确类型的设备:

mScanCallback = new ScanCallback() {
        @Override
        @TargetApi(21)
        public void onScanResult(int callbackType, ScanResult result) {
            BluetoothDevice btDevice = result.getDevice();
            ParcelUuid[] uuids = btDevice.getUuids(); //<-- this is always null!! :(

            Log.d(TAG, ""+btDevice.fetchUuidsWithSdp()); //<-- prints true.
            Log.d(TAG, "result : " + result.toString()); //<-- prints a bunch of relevant info that contains the UUID I want to check.
            Log.d(TAG, "uuids : " + uuids); //<-- prints null.
            /*
            for (ParcelUuid u : …