為Android藍牙連接定義密碼

Question

再次需要您的幫助：

我想與obd2-bluetooth-adapter建立連接。 因此，我看了AndroidSDK中的BluetoothChat-Example。 我能夠與計算機建立連接，但無法將android平板電腦與odb2-bluetooth-adapter（elm327）配對。 找到了一些提示，例如：

    myRemoteBluetoothDevice.setPassKey(....); 

首先，我無法在“ myRemoteBluetoothDevice”上使用該功能-然后我不知道在哪里使用此功能。 在連接線程內？

    public synchronized void connect(BluetoothDevice device, boolean secure) {
      if (D) Log.d(TAG, "connect to: " + device);

      // Cancel any thread attempting to make a connection
      if (mState == STATE_CONNECTING) {
        if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}
      }

      // Cancel any thread currently running a connection
      if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}

      // Start the thread to connect with the given device
      mConnectThread = new ConnectThread(device, secure);
      mConnectThread.start();
      setState(STATE_CONNECTING);
}

我認為可能的解決方案是實現事件偵聽器或類似的方法，當遠程設備需要密碼時調用該方法？ 但是我必須在哪里實施呢？ 我必須在哪里使用它？ 有人可以幫我嗎？

提前致謝 ！！！

PS：“我的應用”基於以下示例： https : //android.googlesource.com/platform/development/+/25b6aed7b2e01ce7b​​dc0dfa1a79eaf009ad178fe/samples/BluetoothChat/src/com/example/android/BluetoothChat/BluetoothChatService.java

問候。

編輯：

試圖實施第一個答案：

我的BroadcastReceiver：

    private final BroadcastReceiver mReceiverRequiresPin = new BroadcastReceiver(){

    @Override
    public void onReceive(Context context, Intent intent){

        try {
            BluetoothDevice newDevice =    intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            Class<?> btDeviceInstance =  Class.forName(BluetoothDevice.class.getCanonicalName());

            Method convert = btDeviceInstance.getMethod("convertPinToBytes", String.class);

            byte[] pin = (byte[]) convert.invoke(newDevice, "1234");

            Method setPin = btDeviceInstance.getMethod("setPin", byte[].class);
            boolean success = (Boolean) setPin.invoke(newDevice, pin);
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
};

還有我的連接方法，我在其中注冊broadcastReceiver：

    private void connect(CordovaArgs args, boolean secure,
    CallbackContext callbackContext) throws JSONException {

      final String actionPinRequested = "android.bluetooth.device.action.PAIRING_REQUEST";
    IntentFilter intentFilterPinRequested = new IntentFilter(actionPinRequested);

      cordova.getActivity().registerReceiver(mReceiverRequiresPin, intentFilterPinRequested);
    String macAddress = args.getString(0);
    BluetoothDevice device = bluetoothAdapter.getRemoteDevice(macAddress);

    if (device != null) {
        connectCallback = callbackContext;
        bluetoothSerialService.connect(device, secure);

        PluginResult result = new PluginResult(
                PluginResult.Status.NO_RESULT);
        result.setKeepCallback(true);
        callbackContext.sendPluginResult(result);

    } else {
        callbackContext.error("Could not connect to " + macAddress);
    }
}

非常感謝您的幫助！ 提前致謝。

沒有人有暗示嗎？

Answer 1

注冊以下廣播偵聽器：android.bluetooth.device.action.PAIRING_REQUEST。

在一次：

    BluetoothDevice newDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    Class<?> btDeviceInstance =  Class.forName(BluetoothDevice.class.getCanonicalName());

    Method convert = btDeviceInstance.getMethod("convertPinToBytes", String.class);

    byte[] pin = (byte[]) convert.invoke(newDevice, "1234");

    Method setPin = btDeviceInstance.getMethod("setPin", byte[].class);
    success = (Boolean) setPin.invoke(newDevice, pin);