android - 无法在 Lollipop 之前的设备上获取 iBeacon 的 UUID

我无法在 Lollipop 之前的设备上获得 iBeacon 的 UUID，但下面我的代码在 Marshmallow Nexus 5x 中工作。

我不想使用任何像 AltBeacon 或相关的库。

BluetoothManager bm = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
BluetoothAdapter mBluetoothAdapter = bm.getAdapter();
if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
    //Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    //startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
} else {
    BluetoothLeScanner scanner = mBluetoothAdapter.getBluetoothLeScanner();
    // scan for devices
    scanner.startScan(new ScanCallback() {
        @Override
        public void onScanResult(int callbackType, ScanResult result) {
            // get the discovered device as you wish
            // this will trigger each time a new device is found
            BluetoothDevice device = result.getDevice();
            if (device.getType() == BluetoothDevice.DEVICE_TYPE_LE) { //int the device type DEVICE_TYPE_CLASSIC, DEVICE_TYPE_LE DEVICE_TYPE_DUAL. DEVICE_TYPE_UNKNOWN if it's not available
                if (device.fetchUuidsWithSdp()) {
                    System.out.println(device.getName());
                    List<ParcelUuid> uuids = result.getScanRecord().getServiceUuids();
                    System.out.println(uuids);
                    System.out.println(getMajor(result.getScanRecord().getBytes()));
                    System.out.println(getMinor(result.getScanRecord().getBytes()));
                } else {
                    System.out.println("failed");
                }
            }
        }
    });
}

最佳答案

BluetoothManager bm = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
           BluetoothAdapter mBluetoothAdapter = bm.getAdapter();
           if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
               //Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
               //startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
           } else {

               if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                   BluetoothLeScanner scanner = mBluetoothAdapter.getBluetoothLeScanner();
                   // scan for devices
                   scanner.startScan(new ScanCallback() {
                       @TargetApi(Build.VERSION_CODES.LOLLIPOP)
                       @Override
                       public void onScanResult(int callbackType, ScanResult result) {
                           // get the discovered device as you wish
                           // this will trigger each time a new device is found
                           BluetoothDevice device = result.getDevice();
                           if (device.getType() == BluetoothDevice.DEVICE_TYPE_LE)//int    the device type DEVICE_TYPE_CLASSIC, DEVICE_TYPE_LE DEVICE_TYPE_DUAL. DEVICE_TYPE_UNKNOWN if it's not available
                           {
                               if (device.fetchUuidsWithSdp()) {
                                   System.out.println(device.getName());
                                   List<ParcelUuid> uuids = result.getScanRecord().getServiceUuids();
                                   System.out.println(uuids);
                                   System.out.println(getMajor(result.getScanRecord().getBytes()));
                                   System.out.println(getMinor(result.getScanRecord().getBytes()));

                               } else {
                                   System.out.println("failed");
                               }
                           }
                       }
                   });
               } else {
                   // targetting kitkat or bellow
                   mBluetoothAdapter.startLeScan(new BluetoothAdapter.LeScanCallback() {
                       @Override
                       public void onLeScan(BluetoothDevice device, int rssi, byte[] scanRecord) {
                           // get the discovered device as you wish\

                       }
                   });
               }
           }