蓝牙与 Nrf UART 配对无法正常工作

Question

蓝牙配对工作不正常。我正在开发基于蓝牙与UART配对的应用程序。在这里，我包含了我的概念和程序。帮助我解决问题。

我的预期结果是如果用户按"连接"按钮。它应该是配对的，没有用户输入和配对请求和PIN的确认屏幕。 最后，设备将响应回已连接。

我的实际结果是确认屏幕和用户输入弹出窗口将打开。之后，设备配对。最后，设备没有响应我已连接。

我被困在这个问题上超过2天。帮助我摆脱这个问题。

1. 在 onstart(( 方法中注册配对

          IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_PAIRING_REQUEST);
         this.registerReceiver(mPairingRequestReceiver, filter);

2. 用于接收配对请求的广播接收器。

  private BroadcastReceiver mPairingRequestReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(BluetoothDevice.ACTION_PAIRING_REQUEST)) {
            try {
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                int pin = intent.getIntExtra("android.bluetooth.device.extra.PAIRING_KEY", 123456);
                //the pin in case you need to accept for an specific pin
                byte[] pinBytes;
                pinBytes = ("" + pin).getBytes("UTF-8");
                device.setPin(pinBytes);

        } catch (Exception e) {
                Log.e(TAG, "Error occurs when trying to auto pair");
                e.printStackTrace();
            }
        }
    }
};

/* 连接设备后，我正在创建绑定*/

     @Override
     public void onDeviceConnected(BluetoothDevice device) {
        device.createBond();
      }

Answer 1

您可以绕过本机蓝牙配对过程，并在语法上与蓝牙外围设备配对。试试这个：

为具有最高优先级的BluetoothDevice.ACTION_PAIRING_REQUEST注册接收器。

private void notPaired(){
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_PAIRING_REQUEST);
    filter.setPriority(SYSTEM_HIGH_PRIORITY-1);
    registerReceiver(mReceiver, filter);
    mDevice.createBound();// OR establish connection with the device and read characteristic for triggering the pairing process 
    getBoundState();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver()
{
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if(BluetoothDevice.ACTION_PAIRING_REQUEST.equals(action)){
            final BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            int type = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, BluetoothDevice.ERROR);
            if(type == BluetoothDevice.PAIRING_VARIANT_PIN){
                byte[] pin = "123456".getBytes();
                device.setPin(pin);
                Log.i("Pairing Process ", "Pairing Key Entered");
                abortBroadcast();
            }else
                Log.i("Pairing Process: ", "Unexected Pairing type");
        }
    }
};

要确保设备已配对，请注册接收器以进行BluetoothDevice.ACTION_BOND_STATE_CHANGED

private void getBoundState(){
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
    registerReceiver(boundStateReciver, filter);
}
private final BroadcastReceiver boundStateReciver= new BroadcastReceiver()
{
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
            final int d = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,-1);
            switch(d){
                case BluetoothDevice.BOND_BONDED:
                    Log.i("Pairing Process ", "Paired successfully");
                break;
            }
        }
    }
};

在"清单"中添加此权限

<uses-permission android:name="android.permission.BLUETOOTH_PRIVILEGED" />