我正在尝试使用健康设备配置文件和示例通过蓝牙从 Onyx2（指尖血氧计）获取数据，这些数据可以在Android 开发者网站上找到。但我收到以下错误
E/BluetoothEventLoop.cpp(432): onHealthDeviceConnectionResult: D-Bus error: org.bluez.Error.HealthError (Error getting remote SDP records). 这个问题的原因是什么？顺便说一句，大约 50 次中的 1 次，我得到了数据。
// Callbacks to handle connection set up and disconnection clean up.
private final BluetoothProfile.ServiceListener mBluetoothServiceListener =
new BluetoothProfile.ServiceListener() {
public void onServiceConnected(int profile, BluetoothProfile proxy) {
if (profile == BluetoothProfile.HEALTH) {
mBluetoothHealth = (BluetoothHealth) proxy;
if (Log.isLoggable(TAG, Log.DEBUG))
Log.d(TAG, "onServiceConnected to profile: " + profile);
}
}
public void onServiceDisconnected(int profile) {
if (profile == BluetoothProfile.HEALTH) {
mBluetoothHealth = null;
}
}
};
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;
sendMessage(STATUS_HEALTH_APP_REG, RESULT_FAIL);
} else if (status == BluetoothHealth.APP_CONFIG_REGISTRATION_SUCCESS) {
mHealthAppConfig = config;
sendMessage(STATUS_HEALTH_APP_REG, RESULT_OK);
} else if (status == BluetoothHealth.APP_CONFIG_UNREGISTRATION_FAILURE ||
status == BluetoothHealth.APP_CONFIG_UNREGISTRATION_SUCCESS) {
sendMessage(STATUS_HEALTH_APP_UNREG,
status == BluetoothHealth.APP_CONFIG_UNREGISTRATION_SUCCESS ?
RESULT_OK : RESULT_FAIL);
}
}
// 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_CONNECTING &&
newState == BluetoothHealth.STATE_CHANNEL_CONNECTED) {
if (config.equals(mHealthAppConfig)) {
mChannelId = channelId;
sendMessage(STATUS_CREATE_CHANNEL, RESULT_OK);
(new ReadThread(fd)).start();
} else {
sendMessage(STATUS_CREATE_CHANNEL, RESULT_FAIL);
}
} else if (prevState == BluetoothHealth.STATE_CHANNEL_CONNECTING &&
newState == BluetoothHealth.STATE_CHANNEL_DISCONNECTED) {
sendMessage(STATUS_CREATE_CHANNEL, RESULT_FAIL);
} else if (newState == BluetoothHealth.STATE_CHANNEL_DISCONNECTED) {
if (config.equals(mHealthAppConfig)) {
sendMessage(STATUS_DESTROY_CHANNEL, RESULT_OK);
} else {
sendMessage(STATUS_DESTROY_CHANNEL, RESULT_FAIL);
}
}
}
};
// Initiates application registration through {@link
// BluetoothHDPService}.
Button registerAppButton = (Button) findViewById(R.id.button_register_app);
registerAppButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
sendMessage(BluetoothHDPService.MSG_REG_HEALTH_APP,
HEALTH_PROFILE_SOURCE_DATA_TYPE);
}
});
// Initiates application unregistration through {@link
// BluetoothHDPService}.
Button unregisterAppButton = (Button) findViewById(R.id.button_unregister_app);
unregisterAppButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
sendMessage(BluetoothHDPService.MSG_UNREG_HEALTH_APP, 0);
}
});
// Initiates channel creation through {@link BluetoothHDPService}. Some
// devices will
// initiate the channel connection, in which case, it is not necessary
// to do this in the
// application. When pressed, the user is asked to select from one of
// the bonded devices
// to connect to.
Button connectButton = (Button) findViewById(R.id.button_connect_channel);
connectButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
mAllBondedDevices = (BluetoothDevice[]) mBluetoothAdapter
.getBondedDevices().toArray(new BluetoothDevice[0]);
if (mAllBondedDevices.length > 0) {
int deviceCount = mAllBondedDevices.length;
if (mDeviceIndex < deviceCount)
mDevice = mAllBondedDevices[mDeviceIndex];
else {
mDeviceIndex = 0;
mDevice = mAllBondedDevices[0];
}
String[] deviceNames = new String[deviceCount];
int i = 0;
for (BluetoothDevice device : mAllBondedDevices) {
deviceNames[i++] = device.getName();
}
SelectDeviceDialogFragment deviceDialog = SelectDeviceDialogFragment
.newInstance(deviceNames, mDeviceIndex);
deviceDialog.show(getFragmentManager(), "deviceDialog");
}
}
});
// Initiates channel disconnect through {@link BluetoothHDPService}.
Button disconnectButton = (Button) findViewById(R.id.button_disconnect_channel);
disconnectButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
disconnectChannel();
}
});
registerReceiver(mReceiver, initIntentFilter());
}
// Sets up communication with {@link BluetoothHDPService}.
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName name, IBinder service) {
mHealthServiceBound = true;
Message msg = Message.obtain(null,
BluetoothHDPService.MSG_REG_CLIENT);
msg.replyTo = mMessenger;
mHealthService = new Messenger(service);
try {
mHealthService.send(msg);
} catch (RemoteException e) {
Log.w(TAG, "Unable to register client to service.");
e.printStackTrace();