Failed to connect to a Bluetooth Bluetooth mobile device using Android BluetoothProfile

Question

I want to connect to a Fora thermometer via a Bluetooth Bluetooth file and get readings. The following is my approach: -

• In OnCreate (), I wrote this piece of code: -

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

• This calls the mBluetoothServiceListener callback, which is listed below: -

  @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;
      }
  }
  };
  

• After that, the code searches for neighboring Bluetooth devices and displays it in the list. The onclicklistener of this list item calls the following code: -

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

• As soon as the registration process is completed, I will try to connect the device as follows: -

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

• Once all of the above steps have been completed, BluetoothHealthCallback is called whenever the device's connection status changes

          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 {
  
          }
      }
  }
      };
  

In the above case, I get the BluetoothHealthCallback exactly 2 times: -

• prevState = BluetoothHealth.STATE_CHANNEL_DISCONNECTED newState = BluetoothHealth.STATE_CHANNEL_CONNECTING

• prevState = BluetoothHealth.STATE_CHANNEL_CONNECTING newState = BluetoothHealth.STATE_CHANNEL_DISCONNECTED

. , . ParcelFileDescriptor null

* :

Answer 1

, , ""?

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

( Bluetooth)

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

,

if (newState == BluetoothHealth.STATE_CHANNEL_CONNECTED) {

if.

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