Android蓝牙:获取已发现设备的UUID

Edd*_*die 15

关于这个状态的文件 ......

始终包含额外字段 BluetoothDevice.EXTRA_UUID

然而,就像你一样,我发现这不是真的.

如果fetchUuidsWithSdp()在设备发现仍在进行时进行呼叫,BluetoothDevice.EXTRA_UUID则可以为空.

BluetoothAdapter.ACTION_DISCOVERY_FINISHED在拨打电话之前,您应该等到收到fetchUuidsWithSdp().

• 即使我在调用`fetchUuidsWithSdp()之前等待设备发现完成,我也会遇到同样的问题. (3认同)

Aru*_*mar 8

注意:此解决方案适用于CLASSIC蓝牙而不适用BLE.对于BLE检查如何发送特定制造商的数据在广告上的周侧

获取Uuids的问题在于您只有一个蓝牙适配器,我们不能使用适配器进行并行api调用.

正如埃迪指出的那样,等待BluetoothAdapter.ACTION_DISCOVERY_FINISHED然后再打电话fetchUuidsWithSdp().

仍然无法保证所有设备都能获取uuids.除此之外,必须等待每个后续调用fetchuuidsWithSdp() 完成,然后为另一个设备调用此方法.

请参阅下面的代码 -

ArrayList<BluetoothDevice> mDeviceList = new ArrayList<BluetoothDevice>();

private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            mDeviceList.add(device);
        } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
            // discovery has finished, give a call to fetchUuidsWithSdp on first device in list.
            if (!mDeviceList.isEmpty()) {
                BluetoothDevice device = mDeviceList.remove(0);
                boolean result = device.fetchUuidsWithSdp();
            }
        } else if (BluetoothDevice.ACTION_UUID.equals(action)) {
            // This is when we can be assured that fetchUuidsWithSdp has completed.
            // So get the uuids and call fetchUuidsWithSdp on another device in list

            BluetoothDevice deviceExtra = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            Parcelable[] uuidExtra = intent.getParcelableArrayExtra(BluetoothDevice.EXTRA_UUID);
            System.out.println("DeviceExtra address - " + deviceExtra.getAddress());
            if (uuidExtra != null) {
                for (Parcelable p : uuidExtra) {
                    System.out.println("uuidExtra - " + p);
                }
            } else {
                System.out.println("uuidExtra is still null");
            }
            if (!mDeviceList.isEmpty()) {
                BluetoothDevice device = mDeviceList.remove(0);
                boolean result = device.fetchUuidsWithSdp();
            }
        }
    }
}

更新:最新的Android版本(毫米及以上)将导致触发与每个设备的配对过程

• 确保注册意图。 (2认同)