7

我调用我的蓝牙适配器mBluetoothAdapter.startDiscovery();，然后它会返回一个蓝牙设备列表。当我按下其中一个设备时，我会这样做：

   mBluetoothGatt = bluetoothDevice.connectGatt(MainActivity.this, false, mGattCallback);

我的回调在哪里：

   private final BluetoothGattCallback mGattCallback =
        new BluetoothGattCallback() {
            @Override
            public void onConnectionStateChange(BluetoothGatt gatt, int status,
                                                int newState) {
                if (newState == BluetoothProfile.STATE_CONNECTED) {
                    mConnectionState = STATE_CONNECTED;
                    Log.i(TAG, "Connected to GATT server.");
                    Log.i(TAG, "Attempting to start service discovery:" +
                            mBluetoothGatt.discoverServices());
                    List<BluetoothGattService> listBGS = mBluetoothGatt.getServices();
                    Log.i("","list size: " + listBGS.size());

                } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
                    mConnectionState = STATE_DISCONNECTED;
                    Log.i(TAG, "Disconnected from GATT server.");
                }
            }

            @Override
            // New services discovered
            public void onServicesDiscovered(BluetoothGatt gatt, int status) {
                if (status == BluetoothGatt.GATT_SUCCESS) {
                    Log.w(TAG, "onServicesDiscovered GATT_SUCCESS: " + status);
                    List<BluetoothGattService> listBGS = mBluetoothGatt.getServices();
                    Log.i("","list size: " + listBGS.size());
                } else {
                    Log.w(TAG, "onServicesDiscovered received: " + status);
                }
            }

            @Override
            // Result of a characteristic read operation
            public void onCharacteristicRead(BluetoothGatt gatt,
                                             BluetoothGattCharacteristic characteristic,
                                             int status) {
                if (status == BluetoothGatt.GATT_SUCCESS) {
                    Log.w(TAG, "onCharacteristicRead GATT_SUCCESS: " + status + " / char: " + characteristic);
                }
            }
        };

现在，当我在手机上尝试它时，我在 onConnectionStateChange 上得到了 STATE_CONNECTED，然后我调用了 discoverServices，我得到了 GATT_SUCCESS onServicesDiscoveres。所以我可以从我的服务中获取 uuid。但是当我在信标上尝试它时，我返回 STATE_CONNECTED，当我调用 discoverServices 时，我返回一个状态代码：129 -> GATT_INTERNAL_ERROR 为什么我的信标会发生这种情况？还有另一种方法，我如何获取设备 uuid？对于beaconManager，我只需要UUID就可以做到这一点：

 try {
        beaconManager.startMonitoringBeaconsInRegion(new Region("myMonitoringUniqueId", null, null, null));
    } catch (RemoteException e) {    }

编辑

我知道信标应该要求我输入配对代码，但它没有。为什么？我尝试添加此代码：

    final IntentFilter pairingRequestFilter = new IntentFilter(BluetoothDevice.ACTION_PAIRING_REQUEST);
    pairingRequestFilter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY - 1);
    registerReceiver(mPairingRequestRecevier, pairingRequestFilter);

但是我仍然没有收到配对和输入密码的请求

这是我的pairingRequestReceiver：

  private final BroadcastReceiver mPairingRequestRecevier = new BroadcastReceiver()
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        if (BluetoothDevice.ACTION_PAIRING_REQUEST.equals(intent.getAction()))
        {
            final BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            int type = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, BluetoothDevice.ERROR);

            if (type == BluetoothDevice.PAIRING_VARIANT_PIN)
            {
                device.setPin(intToByteArray(123456));
                abortBroadcast();
            }
            else
            {
                Log.e("","Unexpected pairing type: " + type);
            }
        }
    }
};
4

1 回答 1

3

经过数小时的反复试验，我确实设法找到了一种让它像这样工作的方法： 1.我开始发现相同，但是当我选择蓝牙设备时，我要求像这样绑定（配对）它：

 private void pairDevice(BluetoothDevice device) {
    try {
        Method method = device.getClass().getMethod("createBond", (Class[]) null);
        method.invoke(device, (Object[]) null);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

我有一个 ACTION_BOND_STATE_CHANGED 接收器：

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

        if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
            final int state        = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR);
            final int prevState    = intent.getIntExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, BluetoothDevice.ERROR);

            if (state == BluetoothDevice.BOND_BONDED && prevState == BluetoothDevice.BOND_BONDING) {
                Log.i("","Paired");
                mBluetoothGatt = btDevice.connectGatt(MainActivity.this, false, mGattCallback);
            } else if (state == BluetoothDevice.BOND_NONE && prevState == BluetoothDevice.BOND_BONDED){
                Log.i("","Unpaired");
            }

        }
    }
};

我这样注册：

         IntentFilter intent = new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
    registerReceiver(mPairReceiver, intent);

只有在此之后，我才尝试连接我的 BluetoothGattCallback。因此，我可以发现服务，等等

于 2018-02-16T09:41:43.000 回答