android - 无法使用 Android BluetoothProfile 连接到蓝牙 Health Device Fora

Question

我想通过 Android BluetoothPRofile 连接到 Fora 温度计并获取读数。以下是我的方法:-

1. 在 OnCreate() 中我写了这段代码:-

   if (!mBluetoothAdapter.getProfileProxy(this, mBluetoothServiceListener,
           BluetoothProfile.HEALTH)) {
       Toast.makeText(this, "No Health Profile Supported",
               Toast.LENGTH_LONG);
       return;
   }
   

2. 这会触发下面提到的 mBluetoothServiceListener 回调:-

   @SuppressLint("NewApi")
   private final BluetoothProfile.ServiceListener mBluetoothServiceListener =
   new BluetoothProfile.ServiceListener() {
   public void onServiceConnected(int profile, BluetoothProfile proxy) {
   
       Log.d(TAG, "onServiceConnected to profile: " + profile + " while health is " + BluetoothProfile.HEALTH);
       if (profile == BluetoothProfile.HEALTH) {
           mBluetoothHealth = (BluetoothHealth) proxy;
           if (Log.isLoggable(TAG, Log.DEBUG))
               Log.d(TAG, "onServiceConnected to profile: " + profile);
       }
       else if(profile == BluetoothProfile.HEADSET)
       {
           Log.d(TAG, "onServiceConnected to profile: " + profile);
       }
   }
   
   public void onServiceDisconnected(int profile) {
       if (profile == BluetoothProfile.HEALTH) {
           mBluetoothHealth = null;
       }
   }
   };
   

3. 在此之后，代码会搜索附近的蓝牙设备并将其显示在列表中。该列表项的 onclicklistener 调用以下代码:-

   boolean bool = mBluetoothHealth.registerSinkAppConfiguration(TAG, HEALTH_PROFILE_SOURCE_DATA_TYPE, mHealthCallback);
   
   // where HEALTH_PROFILE_SOURCE_DATA_TYPE = 0x1008 (it's a body thermometer)
   

4. 注册过程完成后，我会尝试像这样连接设备:-

       boolean bool = mBluetoothHealth.connectChannelToSource(mDevice, mHealthAppConfig);
   

5. 一旦完成上述所有步骤，BluetoothHealthCallback 就会在任何时候被调用设备连接状态改变

           private final BluetoothHealthCallback mHealthCallback = new BluetoothHealthCallback() {
   // Callback to handle application registration and unregistration events.  The service
   // passes the status back to the UI client.
   public void onHealthAppConfigurationStatusChange(BluetoothHealthAppConfiguration config,
           int status) {
       if (status == BluetoothHealth.APP_CONFIG_REGISTRATION_FAILURE) {
           mHealthAppConfig = null;
       } else if (status == BluetoothHealth.APP_CONFIG_REGISTRATION_SUCCESS) {
           mHealthAppConfig = config;
       } else if (status == BluetoothHealth.APP_CONFIG_UNREGISTRATION_FAILURE ||
               status == BluetoothHealth.APP_CONFIG_UNREGISTRATION_SUCCESS) {
       }
   }
   
   // Callback to handle channel connection state changes.
   // Note that the logic of the state machine may need to be modified based on the HDP device.
   // When the HDP device is connected, the received file descriptor is passed to the
   // ReadThread to read the content.
   public void onHealthChannelStateChange(BluetoothHealthAppConfiguration config,
           BluetoothDevice device, int prevState, int newState, ParcelFileDescriptor fd,
           int channelId) {
       if (Log.isLoggable(TAG, Log.DEBUG))
           Log.d(TAG, String.format("prevState\t%d ----------> newState\t%d",
                   prevState, newState));
       if (prevState == BluetoothHealth.STATE_CHANNEL_DISCONNECTED &&
               newState == BluetoothHealth.STATE_CHANNEL_CONNECTED) {
           if (config.equals(mHealthAppConfig)) {
               mChannelId = channelId;
   
               (new ReadThread(fd)).start();
           } else {
   
           }
       } else if (prevState == BluetoothHealth.STATE_CHANNEL_CONNECTING &&
               newState == BluetoothHealth.STATE_CHANNEL_DISCONNECTED) {
   
       } else if (newState == BluetoothHealth.STATE_CHANNEL_DISCONNECTED) {
           if (config.equals(mHealthAppConfig)) {
   
           } else {
   
           }
       }
   }
       };
   

在上述情况下，我得到 BluetoothHealthCallback 恰好 2 次:-

1. 我第一次得到 prevState = BluetoothHealth.STATE_CHANNEL_DISCONNECTED 和newState = BluetoothHealth.STATE_CHANNEL_CONNECTING

2. 在第二次我得到 prevState = BluetoothHealth.STATE_CHANNEL_CONNECTING 和newState = BluetoothHealth.STATE_CHANNEL_DISCONNECTED

即尝试连接到设备，但未成功。同样在这两个回调中，ParcelFileDescriptor 都是空的

*注意:设备已经配对

Answer 1

你认为你下面的“if”语句正确吗？

if (prevState == BluetoothHealth.STATE_CHANNEL_DISCONNECTED && newState == BluetoothHealth.STATE_CHANNEL_CONNECTED) {

它应该是(因为它发生在经典蓝牙设备上)

if (prevState == BluetoothHealth.STATE_CHANNEL_CONNECTING && newState == BluetoothHealth.STATE_CHANNEL_CONNECTED) {

先连接再连接

或者我可以只是

if (newState == BluetoothHealth.STATE_CHANNEL_CONNECTED) {

对其他“if”语句进行同样的更正。

此外，设备是否支持配对和连接选项？如果是，那么您可以尝试手动连接它。