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BluetoothDevice

public final class BluetoothDevice
extends Object implements Parcelable

java.lang.Object
↳	android.bluetooth.BluetoothDevice

Represents a remote Bluetooth device. A BluetoothDevice lets you create a connection with the respective device or query information about it, such as the name, address, class, and bonding state.

This class is really just a thin wrapper for a Bluetooth hardware address. Objects of this class are immutable. Operations on this class are performed on the remote Bluetooth hardware address, using the BluetoothAdapter that was used to create this BluetoothDevice.

To get a BluetoothDevice, use BluetoothAdapter#getRemoteDevice(String) to create one representing a device of a known MAC address (which you can get through device discovery with BluetoothAdapter) or get one from the set of bonded devices returned by BluetoothAdapter#getBondedDevices(). You can then open a BluetoothSocket for communication with the remote device, using createRfcommSocketToServiceRecord(java.util.UUID) over Bluetooth BR/EDR or using createL2capChannel(int) over Bluetooth LE.

Note: Requires the Manifest.permission.BLUETOOTH permission.

Developer Guides

For more information about using Bluetooth, read the Bluetooth developer guide.

See also:

Summary

Constants
`String`	`ACTION_ACL_CONNECTED` Broadcast Action: Indicates a low level (ACL) connection has been established with a remote device.
`String`	`ACTION_ACL_DISCONNECTED` Broadcast Action: Indicates a low level (ACL) disconnection from a remote device.
`String`	`ACTION_ACL_DISCONNECT_REQUESTED` Broadcast Action: Indicates that a low level (ACL) disconnection has been requested for a remote device, and it will soon be disconnected.
`String`	`ACTION_ALIAS_CHANGED` Broadcast Action: Indicates the alias of a remote device has been changed.
`String`	`ACTION_BOND_STATE_CHANGED` Broadcast Action: Indicates a change in the bond state of a remote device.
`String`	`ACTION_CLASS_CHANGED` Broadcast Action: Bluetooth class of a remote device has changed.
`String`	`ACTION_FOUND` Broadcast Action: Remote device discovered.
`String`	`ACTION_NAME_CHANGED` Broadcast Action: Indicates the friendly name of a remote device has been retrieved for the first time, or changed since the last retrieval.
`String`	`ACTION_PAIRING_REQUEST` Broadcast Action: This intent is used to broadcast PAIRING REQUEST Requires `Manifest.permission.BLUETOOTH_ADMIN` to receive.
`String`	`ACTION_UUID` Broadcast Action: This intent is used to broadcast the `UUID` wrapped as a `ParcelUuid` of the remote device after it has been fetched.
`int`	`BOND_BONDED` Indicates the remote device is bonded (paired).
`int`	`BOND_BONDING` Indicates bonding (pairing) is in progress with the remote device.
`int`	`BOND_NONE` Indicates the remote device is not bonded (paired).
`int`	`DEVICE_TYPE_CLASSIC` Bluetooth device type, Classic - BR/EDR devices
`int`	`DEVICE_TYPE_DUAL` Bluetooth device type, Dual Mode - BR/EDR/LE
`int`	`DEVICE_TYPE_LE` Bluetooth device type, Low Energy - LE-only
`int`	`DEVICE_TYPE_UNKNOWN` Bluetooth device type, Unknown
`int`	`ERROR` Sentinel error value for this class.
`String`	`EXTRA_BOND_STATE` Used as an int extra field in `ACTION_BOND_STATE_CHANGED` intents.
`String`	`EXTRA_CLASS` Used as a Parcelable `BluetoothClass` extra field in `ACTION_FOUND` and `ACTION_CLASS_CHANGED` intents.
`String`	`EXTRA_DEVICE` Used as a Parcelable `BluetoothDevice` extra field in every intent broadcast by this class.
`String`	`EXTRA_NAME` Used as a String extra field in `ACTION_NAME_CHANGED` and `ACTION_FOUND` intents.
`String`	`EXTRA_PAIRING_KEY` Used as an int extra field in `ACTION_PAIRING_REQUEST` intents as the value of passkey.
`String`	`EXTRA_PAIRING_VARIANT` Used as an int extra field in `ACTION_PAIRING_REQUEST` intents to indicate pairing method used.
`String`	`EXTRA_PREVIOUS_BOND_STATE` Used as an int extra field in `ACTION_BOND_STATE_CHANGED` intents.
`String`	`EXTRA_RSSI` Used as an optional short extra field in `ACTION_FOUND` intents.
`String`	`EXTRA_UUID` Used as an extra field in `ACTION_UUID` intents, Contains the `ParcelUuid`s of the remote device which is a parcelable version of `UUID`.
`int`	`PAIRING_VARIANT_PASSKEY_CONFIRMATION` The user will be prompted to confirm the passkey displayed on the screen or an app will confirm the passkey for the user.
`int`	`PAIRING_VARIANT_PIN` The user will be prompted to enter a pin or an app will enter a pin for user.
`int`	`PHY_LE_1M` Bluetooth LE 1M PHY.
`int`	`PHY_LE_1M_MASK` Bluetooth LE 1M PHY mask.
`int`	`PHY_LE_2M` Bluetooth LE 2M PHY.
`int`	`PHY_LE_2M_MASK` Bluetooth LE 2M PHY mask.
`int`	`PHY_LE_CODED` Bluetooth LE Coded PHY.
`int`	`PHY_LE_CODED_MASK` Bluetooth LE Coded PHY mask.
`int`	`PHY_OPTION_NO_PREFERRED` No preferred coding when transmitting on the LE Coded PHY.
`int`	`PHY_OPTION_S2` Prefer the S=2 coding to be used when transmitting on the LE Coded PHY.
`int`	`PHY_OPTION_S8` Prefer the S=8 coding to be used when transmitting on the LE Coded PHY.
`int`	`TRANSPORT_AUTO` No preference of physical transport for GATT connections to remote dual-mode devices
`int`	`TRANSPORT_BREDR` Prefer BR/EDR transport for GATT connections to remote dual-mode devices
`int`	`TRANSPORT_LE` Prefer LE transport for GATT connections to remote dual-mode devices

Inherited constants

From interface android.os.Parcelable

`int`	`CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int`	`PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `writeToParcel(Parcel, int)`: the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`".

Fields
`public static final Creator<BluetoothDevice>`	`CREATOR`

Public methods
`BluetoothGatt`	`connectGatt(Context context, boolean autoConnect, BluetoothGattCallback callback)` Connect to GATT Server hosted by this device.
`BluetoothGatt`	`connectGatt(Context context, boolean autoConnect, BluetoothGattCallback callback, int transport, int phy, Handler handler)` Connect to GATT Server hosted by this device.
`BluetoothGatt`	`connectGatt(Context context, boolean autoConnect, BluetoothGattCallback callback, int transport, int phy)` Connect to GATT Server hosted by this device.
`BluetoothGatt`	`connectGatt(Context context, boolean autoConnect, BluetoothGattCallback callback, int transport)` Connect to GATT Server hosted by this device.
`boolean`	`createBond()` Start the bonding (pairing) process with the remote device.
`BluetoothSocket`	`createInsecureL2capChannel(int psm)` Create a Bluetooth L2CAP Connection-oriented Channel (CoC) `BluetoothSocket` that can be used to start a secure outgoing connection to the remote device with the same dynamic protocol/service multiplexer (PSM) value.
`BluetoothSocket`	`createInsecureRfcommSocketToServiceRecord(UUID uuid)` Create an RFCOMM `BluetoothSocket` socket ready to start an insecure outgoing connection to this remote device using SDP lookup of uuid.
`BluetoothSocket`	`createL2capChannel(int psm)` Create a Bluetooth L2CAP Connection-oriented Channel (CoC) `BluetoothSocket` that can be used to start a secure outgoing connection to the remote device with the same dynamic protocol/service multiplexer (PSM) value.
`BluetoothSocket`	`createRfcommSocketToServiceRecord(UUID uuid)` Create an RFCOMM `BluetoothSocket` ready to start a secure outgoing connection to this remote device using SDP lookup of uuid.
`int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`boolean`	`equals(Object o)` Indicates whether some other object is "equal to" this one.
`boolean`	`fetchUuidsWithSdp()` Perform a service discovery on the remote device to get the UUIDs supported.
`String`	`getAddress()` Returns the hardware address of this BluetoothDevice.
`String`	`getAlias()` Get the Bluetooth alias of the remote device.
`BluetoothClass`	`getBluetoothClass()` Get the Bluetooth class of the remote device.
`int`	`getBondState()` Get the bond state of the remote device.
`String`	`getName()` Get the friendly Bluetooth name of the remote device.
`int`	`getType()` Get the Bluetooth device type of the remote device.
`ParcelUuid[]`	`getUuids()` Returns the supported features (UUIDs) of the remote device.
`int`	`hashCode()` Returns a hash code value for the object.
`boolean`	`setPairingConfirmation(boolean confirm)` Confirm passkey for `PAIRING_VARIANT_PASSKEY_CONFIRMATION` pairing.
`boolean`	`setPin(byte[] pin)` Set the pin during pairing when the pairing method is `PAIRING_VARIANT_PIN` Requires `Manifest.permission.BLUETOOTH_ADMIN`.
`String`	`toString()` Returns a string representation of this BluetoothDevice.
`void`	`writeToParcel(Parcel out, int flags)` Flatten this object in to a Parcel.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


        
          android.os.Parcelable

`abstract int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`abstract void`	`writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

Constants

ACTION_ACL_CONNECTED

public static final String ACTION_ACL_CONNECTED

Broadcast Action: Indicates a low level (ACL) connection has been established with a remote device.

Always contains the extra field EXTRA_DEVICE.

ACL connections are managed automatically by the Android Bluetooth stack.

Requires Manifest.permission.BLUETOOTH to receive.

Constant Value: "android.bluetooth.device.action.ACL_CONNECTED"

ACTION_ACL_DISCONNECTED

public static final String ACTION_ACL_DISCONNECTED

Broadcast Action: Indicates a low level (ACL) disconnection from a remote device.

Always contains the extra field EXTRA_DEVICE.

ACL connections are managed automatically by the Android Bluetooth stack.

Requires Manifest.permission.BLUETOOTH to receive.

Constant Value: "android.bluetooth.device.action.ACL_DISCONNECTED"

ACTION_ACL_DISCONNECT_REQUESTED

public static final String ACTION_ACL_DISCONNECT_REQUESTED

Broadcast Action: Indicates that a low level (ACL) disconnection has been requested for a remote device, and it will soon be disconnected.

This is useful for graceful disconnection. Applications should use this intent as a hint to immediately terminate higher level connections (RFCOMM, L2CAP, or profile connections) to the remote device.

Always contains the extra field EXTRA_DEVICE.

Requires Manifest.permission.BLUETOOTH to receive.

Constant Value: "android.bluetooth.device.action.ACL_DISCONNECT_REQUESTED"

ACTION_ALIAS_CHANGED

public static final String ACTION_ALIAS_CHANGED

Broadcast Action: Indicates the alias of a remote device has been changed.

Always contains the extra field EXTRA_DEVICE.

Requires Manifest.permission.BLUETOOTH to receive.

Constant Value: "android.bluetooth.device.action.ALIAS_CHANGED"

ACTION_BOND_STATE_CHANGED

public static final String ACTION_BOND_STATE_CHANGED

Broadcast Action: Indicates a change in the bond state of a remote device. For example, if a device is bonded (paired).

Always contains the extra fields EXTRA_DEVICE, EXTRA_BOND_STATE and EXTRA_PREVIOUS_BOND_STATE.

Requires Manifest.permission.BLUETOOTH to receive.

Constant Value: "android.bluetooth.device.action.BOND_STATE_CHANGED"

ACTION_CLASS_CHANGED

public static final String ACTION_CLASS_CHANGED

Broadcast Action: Bluetooth class of a remote device has changed.

Always contains the extra fields EXTRA_DEVICE and EXTRA_CLASS.

Requires Manifest.permission.BLUETOOTH to receive.

See also:

BluetoothClass

Constant Value: "android.bluetooth.device.action.CLASS_CHANGED"

ACTION_FOUND

public static final String ACTION_FOUND

Broadcast Action: Remote device discovered.

Sent when a remote device is found during discovery.

Always contains the extra fields EXTRA_DEVICE and EXTRA_CLASS. Can contain the extra fields EXTRA_NAME and/or EXTRA_RSSI if they are available.

Requires Manifest.permission.BLUETOOTH and Manifest.permission.ACCESS_COARSE_LOCATION to receive.

Constant Value: "android.bluetooth.device.action.FOUND"

ACTION_NAME_CHANGED

public static final String ACTION_NAME_CHANGED

Broadcast Action: Indicates the friendly name of a remote device has been retrieved for the first time, or changed since the last retrieval.

Always contains the extra fields EXTRA_DEVICE and EXTRA_NAME.

Requires Manifest.permission.BLUETOOTH to receive.

Constant Value: "android.bluetooth.device.action.NAME_CHANGED"

ACTION_PAIRING_REQUEST

public static final String ACTION_PAIRING_REQUEST

Broadcast Action: This intent is used to broadcast PAIRING REQUEST

Requires Manifest.permission.BLUETOOTH_ADMIN to receive.

Constant Value: "android.bluetooth.device.action.PAIRING_REQUEST"

ACTION_UUID

public static final String ACTION_UUID

Broadcast Action: This intent is used to broadcast the UUID wrapped as a ParcelUuid of the remote device after it has been fetched. This intent is sent only when the UUIDs of the remote device are requested to be fetched using Service Discovery Protocol

Always contains the extra field EXTRA_DEVICE

Always contains the extra field EXTRA_UUID

Requires Manifest.permission.BLUETOOTH_ADMIN to receive.

Constant Value: "android.bluetooth.device.action.UUID"

BOND_BONDED

public static final int BOND_BONDED

Indicates the remote device is bonded (paired).

A shared link keys exists locally for the remote device, so communication can be authenticated and encrypted.

Being bonded (paired) with a remote device does not necessarily mean the device is currently connected. It just means that the pending procedure was completed at some earlier time, and the link key is still stored locally, ready to use on the next connection.

Constant Value: 12 (0x0000000c)

BOND_BONDING

public static final int BOND_BONDING

Indicates bonding (pairing) is in progress with the remote device.

Constant Value: 11 (0x0000000b)

BOND_NONE

public static final int BOND_NONE

Indicates the remote device is not bonded (paired).

There is no shared link key with the remote device, so communication (if it is allowed at all) will be unauthenticated and unencrypted.

Constant Value: 10 (0x0000000a)

DEVICE_TYPE_CLASSIC

public static final int DEVICE_TYPE_CLASSIC

Bluetooth device type, Classic - BR/EDR devices

Constant Value: 1 (0x00000001)

DEVICE_TYPE_DUAL

public static final int DEVICE_TYPE_DUAL

Bluetooth device type, Dual Mode - BR/EDR/LE

Constant Value: 3 (0x00000003)

DEVICE_TYPE_LE

public static final int DEVICE_TYPE_LE

Bluetooth device type, Low Energy - LE-only

Constant Value: 2 (0x00000002)

DEVICE_TYPE_UNKNOWN

public static final int DEVICE_TYPE_UNKNOWN

Bluetooth device type, Unknown

Constant Value: 0 (0x00000000)

ERROR

public static final int ERROR

Sentinel error value for this class. Guaranteed to not equal any other integer constant in this class. Provided as a convenience for functions that require a sentinel error value, for example:

Intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR)

Constant Value: -2147483648 (0x80000000)

EXTRA_BOND_STATE

public static final String EXTRA_BOND_STATE

Used as an int extra field in ACTION_BOND_STATE_CHANGED intents. Contains the bond state of the remote device.

Possible values are: BOND_NONE, BOND_BONDING, BOND_BONDED.

Constant Value: "android.bluetooth.device.extra.BOND_STATE"

EXTRA_CLASS

public static final String EXTRA_CLASS

Used as a Parcelable BluetoothClass extra field in ACTION_FOUND and ACTION_CLASS_CHANGED intents.

Constant Value: "android.bluetooth.device.extra.CLASS"

EXTRA_DEVICE

public static final String EXTRA_DEVICE

Used as a Parcelable BluetoothDevice extra field in every intent broadcast by this class. It contains the BluetoothDevice that the intent applies to.

Constant Value: "android.bluetooth.device.extra.DEVICE"

EXTRA_NAME

public static final String EXTRA_NAME

Used as a String extra field in ACTION_NAME_CHANGED and ACTION_FOUND intents. It contains the friendly Bluetooth name.

Constant Value: "android.bluetooth.device.extra.NAME"

EXTRA_PAIRING_KEY

public static final String EXTRA_PAIRING_KEY

Used as an int extra field in ACTION_PAIRING_REQUEST intents as the value of passkey.

Constant Value: "android.bluetooth.device.extra.PAIRING_KEY"

EXTRA_PAIRING_VARIANT

public static final String EXTRA_PAIRING_VARIANT

Used as an int extra field in ACTION_PAIRING_REQUEST intents to indicate pairing method used. Possible values are: PAIRING_VARIANT_PIN, PAIRING_VARIANT_PASSKEY_CONFIRMATION,

Constant Value: "android.bluetooth.device.extra.PAIRING_VARIANT"

EXTRA_PREVIOUS_BOND_STATE

public static final String EXTRA_PREVIOUS_BOND_STATE

Used as an int extra field in ACTION_BOND_STATE_CHANGED intents. Contains the previous bond state of the remote device.

Possible values are: BOND_NONE, BOND_BONDING, BOND_BONDED.

Constant Value: "android.bluetooth.device.extra.PREVIOUS_BOND_STATE"

EXTRA_RSSI

public static final String EXTRA_RSSI

Used as an optional short extra field in ACTION_FOUND intents. Contains the RSSI value of the remote device as reported by the Bluetooth hardware.

Constant Value: "android.bluetooth.device.extra.RSSI"

EXTRA_UUID

public static final String EXTRA_UUID

Used as an extra field in ACTION_UUID intents, Contains the ParcelUuids of the remote device which is a parcelable version of UUID.

Constant Value: "android.bluetooth.device.extra.UUID"

PAIRING_VARIANT_PASSKEY_CONFIRMATION

public static final int PAIRING_VARIANT_PASSKEY_CONFIRMATION

The user will be prompted to confirm the passkey displayed on the screen or an app will confirm the passkey for the user.

Constant Value: 2 (0x00000002)

PAIRING_VARIANT_PIN

public static final int PAIRING_VARIANT_PIN

The user will be prompted to enter a pin or an app will enter a pin for user.

Constant Value: 0 (0x00000000)

PHY_LE_1M

public static final int PHY_LE_1M

Bluetooth LE 1M PHY. Used to refer to LE 1M Physical Channel for advertising, scanning or connection.

Constant Value: 1 (0x00000001)

PHY_LE_1M_MASK

public static final int PHY_LE_1M_MASK

Bluetooth LE 1M PHY mask. Used to specify LE 1M Physical Channel as one of many available options in a bitmask.

Constant Value: 1 (0x00000001)

PHY_LE_2M

public static final int PHY_LE_2M

Bluetooth LE 2M PHY. Used to refer to LE 2M Physical Channel for advertising, scanning or connection.

Constant Value: 2 (0x00000002)

PHY_LE_2M_MASK

public static final int PHY_LE_2M_MASK

Bluetooth LE 2M PHY mask. Used to specify LE 2M Physical Channel as one of many available options in a bitmask.

Constant Value: 2 (0x00000002)

PHY_LE_CODED

public static final int PHY_LE_CODED

Bluetooth LE Coded PHY. Used to refer to LE Coded Physical Channel for advertising, scanning or connection.

Constant Value: 3 (0x00000003)

PHY_LE_CODED_MASK

public static final int PHY_LE_CODED_MASK

Bluetooth LE Coded PHY mask. Used to specify LE Coded Physical Channel as one of many available options in a bitmask.

Constant Value: 4 (0x00000004)

PHY_OPTION_NO_PREFERRED

public static final int PHY_OPTION_NO_PREFERRED

No preferred coding when transmitting on the LE Coded PHY.

Constant Value: 0 (0x00000000)

PHY_OPTION_S2

public static final int PHY_OPTION_S2

Prefer the S=2 coding to be used when transmitting on the LE Coded PHY.

Constant Value: 1 (0x00000001)

PHY_OPTION_S8

public static final int PHY_OPTION_S8

Prefer the S=8 coding to be used when transmitting on the LE Coded PHY.

Constant Value: 2 (0x00000002)

TRANSPORT_AUTO

public static final int TRANSPORT_AUTO

No preference of physical transport for GATT connections to remote dual-mode devices

Constant Value: 0 (0x00000000)

TRANSPORT_BREDR

public static final int TRANSPORT_BREDR

Prefer BR/EDR transport for GATT connections to remote dual-mode devices

Constant Value: 1 (0x00000001)

TRANSPORT_LE

public static final int TRANSPORT_LE

Prefer LE transport for GATT connections to remote dual-mode devices

Constant Value: 2 (0x00000002)

Fields

CREATOR

public static final Creator<BluetoothDevice> CREATOR

Public methods

connectGatt

public BluetoothGatt connectGatt (Context context, 
                boolean autoConnect, 
                BluetoothGattCallback callback)

Connect to GATT Server hosted by this device. Caller acts as GATT client. The callback is used to deliver results to Caller, such as connection status as well as any further GATT client operations. The method returns a BluetoothGatt instance. You can use BluetoothGatt to conduct GATT client operations.

Parameters
`context`	`Context`
`autoConnect`	`boolean`: Whether to directly connect to the remote device (false) or to automatically connect as soon as the remote device becomes available (true).
`callback`	`BluetoothGattCallback`: GATT callback handler that will receive asynchronous callbacks.

Returns
`BluetoothGatt`

Throws
`IllegalArgumentException`	if callback is null

connectGatt

public BluetoothGatt connectGatt (Context context, 
                boolean autoConnect, 
                BluetoothGattCallback callback, 
                int transport, 
                int phy, 
                Handler handler)

Parameters
`context`	`Context`
`autoConnect`	`boolean`: Whether to directly connect to the remote device (false) or to automatically connect as soon as the remote device becomes available (true).
`callback`	`BluetoothGattCallback`: GATT callback handler that will receive asynchronous callbacks.
`transport`	`int`: preferred transport for GATT connections to remote dual-mode devices `BluetoothDevice#TRANSPORT_AUTO` or `BluetoothDevice#TRANSPORT_BREDR` or `BluetoothDevice#TRANSPORT_LE`
`phy`	`int`: preferred PHY for connections to remote LE device. Bitwise OR of any of `BluetoothDevice#PHY_LE_1M_MASK`, `BluetoothDevice#PHY_LE_2M_MASK`, an d`BluetoothDevice#PHY_LE_CODED_MASK`. This option does not take effect if `autoConnect` is set to true.
`handler`	`Handler`: The handler to use for the callback. If `null`, callbacks will happen on an un-specified background thread.

Returns
`BluetoothGatt`

Throws
`NullPointerException`	if callback is null

connectGatt

public BluetoothGatt connectGatt (Context context, 
                boolean autoConnect, 
                BluetoothGattCallback callback, 
                int transport, 
                int phy)

Parameters
`context`	`Context`
`autoConnect`	`boolean`: Whether to directly connect to the remote device (false) or to automatically connect as soon as the remote device becomes available (true).
`callback`	`BluetoothGattCallback`: GATT callback handler that will receive asynchronous callbacks.
`transport`	`int`: preferred transport for GATT connections to remote dual-mode devices `BluetoothDevice#TRANSPORT_AUTO` or `BluetoothDevice#TRANSPORT_BREDR` or `BluetoothDevice#TRANSPORT_LE`
`phy`	`int`: preferred PHY for connections to remote LE device. Bitwise OR of any of `BluetoothDevice#PHY_LE_1M_MASK`, `BluetoothDevice#PHY_LE_2M_MASK`, and `BluetoothDevice#PHY_LE_CODED_MASK`. This option does not take effect if `autoConnect` is set to true.

Returns
`BluetoothGatt`

Throws
`NullPointerException`	if callback is null

connectGatt

public BluetoothGatt connectGatt (Context context, 
                boolean autoConnect, 
                BluetoothGattCallback callback, 
                int transport)

Parameters
`context`	`Context`
`autoConnect`	`boolean`: Whether to directly connect to the remote device (false) or to automatically connect as soon as the remote device becomes available (true).
`callback`	`BluetoothGattCallback`: GATT callback handler that will receive asynchronous callbacks.
`transport`	`int`: preferred transport for GATT connections to remote dual-mode devices `BluetoothDevice#TRANSPORT_AUTO` or `BluetoothDevice#TRANSPORT_BREDR` or `BluetoothDevice#TRANSPORT_LE`

Returns
`BluetoothGatt`

Throws
`IllegalArgumentException`	if callback is null

createBond

public boolean createBond ()

Start the bonding (pairing) process with the remote device.

This is an asynchronous call, it will return immediately. Register for ACTION_BOND_STATE_CHANGED intents to be notified when the bonding process completes, and its result.

Android system services will handle the necessary user interactions to confirm and complete the bonding process.
Requires Manifest.permission.BLUETOOTH_ADMIN

Returns
`boolean`	false on immediate error, true if bonding will begin

createInsecureL2capChannel

public BluetoothSocket createInsecureL2capChannel (int psm)

Create a Bluetooth L2CAP Connection-oriented Channel (CoC) BluetoothSocket that can be used to start a secure outgoing connection to the remote device with the same dynamic protocol/service multiplexer (PSM) value. The supported Bluetooth transport is LE only.

This is designed to be used with BluetoothAdapter#listenUsingInsecureL2capChannel() for peer-peer Bluetooth applications.

Use BluetoothSocket#connect to initiate the outgoing connection.

Application using this API is responsible for obtaining PSM value from remote device.

The communication channel may not have an authenticated link key, i.e. it may be subject to man-in-the-middle attacks. Use createL2capChannel(int) if an encrypted and authenticated communication channel is possible.
Requires Manifest.permission.BLUETOOTH

Parameters
`psm`	`int`: dynamic PSM value from remote device

Returns
`BluetoothSocket`	a CoC #BluetoothSocket ready for an outgoing connection This value cannot be `null`.

Throws
`IOException`	on error, for example Bluetooth not available, or insufficient permissions

createInsecureRfcommSocketToServiceRecord

public BluetoothSocket createInsecureRfcommSocketToServiceRecord (UUID uuid)

Create an RFCOMM BluetoothSocket socket ready to start an insecure outgoing connection to this remote device using SDP lookup of uuid.

The communication channel will not have an authenticated link key i.e it will be subject to man-in-the-middle attacks. For Bluetooth 2.1 devices, the link key will be encrypted, as encryption is mandatory. For legacy devices (pre Bluetooth 2.1 devices) the link key will be not be encrypted. Use createRfcommSocketToServiceRecord(UUID) if an encrypted and authenticated communication channel is desired.

This is designed to be used with BluetoothAdapter#listenUsingInsecureRfcommWithServiceRecord for peer-peer Bluetooth applications.

Use BluetoothSocket#connect to initiate the outgoing connection. This will also perform an SDP lookup of the given uuid to determine which channel to connect to.

The remote device will be authenticated and communication on this socket will be encrypted.

Hint: If you are connecting to a Bluetooth serial board then try using the well-known SPP UUID 00001101-0000-1000-8000-00805F9B34FB. However if you are connecting to an Android peer then please generate your own unique UUID.
Requires Manifest.permission.BLUETOOTH

Parameters
`uuid`	`UUID`: service record uuid to lookup RFCOMM channel

Returns
`BluetoothSocket`	a RFCOMM BluetoothServerSocket ready for an outgoing connection

Throws
`IOException`	on error, for example Bluetooth not available, or insufficient permissions

createL2capChannel

public BluetoothSocket createL2capChannel (int psm)

This is designed to be used with BluetoothAdapter#listenUsingL2capChannel() for peer-peer Bluetooth applications.

Use BluetoothSocket#connect to initiate the outgoing connection.

Application using this API is responsible for obtaining PSM value from remote device.

The remote device will be authenticated and communication on this socket will be encrypted.

Use this socket if an authenticated socket link is possible. Authentication refers to the authentication of the link key to prevent man-in-the-middle type of attacks.
Requires Manifest.permission.BLUETOOTH

Parameters
`psm`	`int`: dynamic PSM value from remote device

Returns
`BluetoothSocket`	a CoC #BluetoothSocket ready for an outgoing connection This value cannot be `null`.

Throws
`IOException`	on error, for example Bluetooth not available, or insufficient permissions

createRfcommSocketToServiceRecord

public BluetoothSocket createRfcommSocketToServiceRecord (UUID uuid)

Create an RFCOMM BluetoothSocket ready to start a secure outgoing connection to this remote device using SDP lookup of uuid.

This is designed to be used with BluetoothAdapter#listenUsingRfcommWithServiceRecord for peer-peer Bluetooth applications.

Use BluetoothSocket#connect to initiate the outgoing connection. This will also perform an SDP lookup of the given uuid to determine which channel to connect to.

The remote device will be authenticated and communication on this socket will be encrypted.

Use this socket only if an authenticated socket link is possible. Authentication refers to the authentication of the link key to prevent man-in-the-middle type of attacks. For example, for Bluetooth 2.1 devices, if any of the devices does not have an input and output capability or just has the ability to display a numeric key, a secure socket connection is not possible. In such a case, use createInsecureRfcommSocketToServiceRecord(UUID). For more details, refer to the Security Model section 5.2 (vol 3) of Bluetooth Core Specification version 2.1 + EDR.

Parameters
`uuid`	`UUID`: service record uuid to lookup RFCOMM channel

Returns
`BluetoothSocket`	a RFCOMM BluetoothServerSocket ready for an outgoing connection

Throws
`IOException`	on error, for example Bluetooth not available, or insufficient permissions

describeContents

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
`int`	a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or `CONTENTS_FILE_DESCRIPTOR`

equals

public boolean equals (Object o)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

Parameters
`o`	`Object`: the reference object with which to compare.

Returns
`boolean`	`true` if this object is the same as the obj argument; `false` otherwise.

fetchUuidsWithSdp

public boolean fetchUuidsWithSdp ()

Perform a service discovery on the remote device to get the UUIDs supported.

This API is asynchronous and ACTION_UUID intent is sent, with the UUIDs supported by the remote end. If there is an error in getting the SDP records or if the process takes a long time, ACTION_UUID intent is sent with the UUIDs that is currently present in the cache. Clients should use the getUuids() to get UUIDs if service discovery is not to be performed.
Requires Manifest.permission.BLUETOOTH

Returns
`boolean`	False if the sanity check fails, True if the process of initiating an ACL connection to the remote device was started.

getAddress

public String getAddress ()

Returns the hardware address of this BluetoothDevice.

For example, "00:11:22:AA:BB:CC".

Returns
`String`	Bluetooth hardware address as string

getAlias

public String getAlias ()

Get the Bluetooth alias of the remote device.

Alias is the locally modified name of a remote device.
Requires Manifest.permission.BLUETOOTH

Returns
`String`	the Bluetooth alias, the friendly device name if no alias, or null if there was a problem

getBluetoothClass

public BluetoothClass getBluetoothClass ()

Get the Bluetooth class of the remote device.
Requires Manifest.permission.BLUETOOTH

Returns
`BluetoothClass`	Bluetooth class object, or null on error

getBondState

public int getBondState ()

Get the bond state of the remote device.

Possible values for the bond state are: BOND_NONE, BOND_BONDING, BOND_BONDED.
Requires Manifest.permission.BLUETOOTH

Returns
`int`	the bond state

getName

public String getName ()

Get the friendly Bluetooth name of the remote device.

The local adapter will automatically retrieve remote names when performing a device scan, and will cache them. This method just returns the name for this device from the cache.
Requires Manifest.permission.BLUETOOTH

Returns
`String`	the Bluetooth name, or null if there was a problem.

getType

public int getType ()

Get the Bluetooth device type of the remote device.
Requires Manifest.permission.BLUETOOTH

Returns
`int`	the device type `DEVICE_TYPE_CLASSIC`, `DEVICE_TYPE_LE` `DEVICE_TYPE_DUAL`. `DEVICE_TYPE_UNKNOWN` if it's not available

getUuids

public ParcelUuid[] getUuids ()

Returns the supported features (UUIDs) of the remote device.

This method does not start a service discovery procedure to retrieve the UUIDs from the remote device. Instead, the local cached copy of the service UUIDs are returned.

Use fetchUuidsWithSdp() if fresh UUIDs are desired.
Requires Manifest.permission.BLUETOOTH

Returns
`ParcelUuid[]`	the supported features (UUIDs) of the remote device, or null on error

hashCode

public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Returns
`int`	a hash code value for this object.

setPairingConfirmation

public boolean setPairingConfirmation (boolean confirm)

Confirm passkey for PAIRING_VARIANT_PASSKEY_CONFIRMATION pairing.
Requires Manifest.permission.BLUETOOTH_PRIVILEGED

Parameters
`confirm`	`boolean`

Returns
`boolean`	true confirmation has been sent out false for error

setPin

public boolean setPin (byte[] pin)

Set the pin during pairing when the pairing method is PAIRING_VARIANT_PIN

Requires Manifest.permission.BLUETOOTH_ADMIN.

Parameters
`pin`	`byte`

Returns
`boolean`	true pin has been set false for error

toString

public String toString ()

Returns a string representation of this BluetoothDevice.

Currently this is the Bluetooth hardware address, for example "00:11:22:AA:BB:CC". However, you should always use getAddress() if you explicitly require the Bluetooth hardware address in case the toString() representation changes in the future.

Returns
`String`	string representation of this BluetoothDevice

writeToParcel

public void writeToParcel (Parcel out, 
                int flags)

Flatten this object in to a Parcel.

Parameters
`out`	`Parcel`: The Parcel in which the object should be written.
`flags`	`int`: Additional flags about how the object should be written. May be 0 or `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES