BluetoothDevice

See also:

• BluetoothAdapter
• BluetoothSocket

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 fields EXTRA_DEVICE and EXTRA_TRANSPORT.

ACL connections are managed automatically by the Android Bluetooth stack.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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 fields EXTRA_DEVICE and EXTRA_TRANSPORT.

ACL connections are managed automatically by the Android Bluetooth stack.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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 and/or EXTRA_IS_COORDINATED_SET_MEMBER if they are available.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_SCAN permission which can be gained with Activity.requestPermissions(String[], int).
In addition, this requires either the Manifest.permission.ACCESS_FINE_LOCATION permission or a strong assertion that you will never derive the physical location of the device. You can make this assertion by declaring usesPermissionFlags="neverForLocation" on the relevant <uses-permission> manifest tag, but it may restrict the types of Bluetooth devices you can interact with.
Requires Manifest.permission.BLUETOOTH_SCAN

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH_ADMIN permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH_ADMIN permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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

ADDRESS_TYPE_ANONYMOUS

public static final int ADDRESS_TYPE_ANONYMOUS

Address type used to indicate an anonymous advertisement.

Constant Value: 255 (0x000000ff)

ADDRESS_TYPE_PUBLIC

public static final int ADDRESS_TYPE_PUBLIC

Hardware MAC Address of the device

Constant Value: 0 (0x00000000)

ADDRESS_TYPE_RANDOM

public static final int ADDRESS_TYPE_RANDOM

Address is either resolvable, non-resolvable or static.

Constant Value: 1 (0x00000001)

ADDRESS_TYPE_UNKNOWN

public static final int ADDRESS_TYPE_UNKNOWN

Address type is unknown or unavailable

Constant Value: 65535 (0x0000ffff)

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_IS_COORDINATED_SET_MEMBER

public static final String EXTRA_IS_COORDINATED_SET_MEMBER

Used as a boolean extra field in ACTION_FOUND intents. It contains the information if device is discovered as member of a coordinated set or not. Pairing with device that belongs to a set would trigger pairing with the rest of set members. See Bluetooth CSIP specification for more details.

Constant Value: "android.bluetooth.extra.IS_COORDINATED_SET_MEMBER"

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. The Bluetooth Passkey is a 6-digit numerical value represented as integer value in the range 0x00000000 \u2013 0x000F423F (000000 to 999999).

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_TRANSPORT

public static final String EXTRA_TRANSPORT

Used as an int extra field in ACTION_ACL_CONNECTED, ACTION_ACL_DISCONNECTED and ERROR(/#ACTION_ENCRYPTION_CHANGE) intents to indicate which transport is connected. Possible values are: TRANSPORT_BREDR and TRANSPORT_LE.

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

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. A null EXTRA_UUID indicates a timeout.

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

Constant representing the BR/EDR transport.

Constant Value: 1 (0x00000001)

TRANSPORT_LE

public static final int TRANSPORT_LE

Constant representing the Bluetooth Low Energy (BLE) Transport.

Constant Value: 2 (0x00000002)

CREATOR

public static final Creator<BluetoothDevice> CREATOR

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.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

connectGatt

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

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.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

connectGatt

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

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.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

connectGatt

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

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.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH_ADMIN permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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 person-in-the-middle attacks. Use createL2capChannel(int) if an encrypted and authenticated communication channel is possible.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.

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 person-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(String, UUID) 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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.

createL2capChannel

public 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. The supported Bluetooth transport is LE only.

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 person-in-the-middle type of attacks.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.

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(String, UUID) 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 person-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.

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.

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.

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.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

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, or the device is bonding and we have its UUIDs cached, 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. If there is an ongoing bonding process, service discovery or device inquiry, the request will be queued.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

getAddress

public String getAddress ()

Returns the hardware address of this BluetoothDevice.

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

getAddressType

public int getAddressType ()

Returns the address type of this BluetoothDevice, one of ADDRESS_TYPE_PUBLIC, ADDRESS_TYPE_RANDOM, ADDRESS_TYPE_ANONYMOUS, or ADDRESS_TYPE_UNKNOWN.

getAlias

public String getAlias ()

Get the locally modifiable name (alias) of the remote Bluetooth device.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

getBluetoothClass

public BluetoothClass getBluetoothClass ()

Get the Bluetooth class of the remote device.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

getType

public int getType ()

Get the Bluetooth device type of the remote device.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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.
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

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 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 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.

setAlias

public int setAlias (String alias)

Sets the locally modifiable name (alias) of the remote Bluetooth device. This method overwrites the previously stored alias. The new alias is saved in local storage so that the change is preserved over power cycles.

This method requires the calling app to have the Manifest.permission.BLUETOOTH_CONNECT permission. Additionally, an app must either have the Manifest.permission.BLUETOOTH_PRIVILEGED or be associated with the Companion Device manager (see CompanionDeviceManager.associate(AssociationRequest, android.companion.CompanionDeviceManager.Callback, Handler))
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).

setPairingConfirmation

public boolean setPairingConfirmation (boolean confirm)

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

setPin

public boolean setPin (byte[] pin)

Set the pin during pairing when the pairing method is PAIRING_VARIANT_PIN
For apps targeting Build.VERSION_CODES.R or lower, this requires the Manifest.permission.BLUETOOTH_ADMIN permission which can be gained with a simple <uses-permission> manifest tag.
For apps targeting Build.VERSION_CODES.S or or higher, this requires the Manifest.permission.BLUETOOTH_CONNECT permission which can be gained with Activity.requestPermissions(String[], int).
Requires Manifest.permission.BLUETOOTH_CONNECT

toString

public String toString ()

Returns a string representation of this BluetoothDevice.

For apps targeting Build.VERSION_CODES.UPSIDE_DOWN_CAKE (API level 34) or higher, this returns the MAC address of the device redacted by replacing the hexadecimal digits of leftmost 4 bytes (in big endian order) with "XX", e.g., "XX:XX:XX:XX:12:34". For apps targeting earlier versions, the MAC address is returned without redaction.

Warning: The return value of toString() may change in the future. It is intended to be used in logging statements. Thus apps should never rely on the return value of toString() in their logic. Always use other appropriate APIs instead (e.g., use getAddress() to get the MAC address).

writeToParcel

public void writeToParcel (Parcel out, 
                int flags)

Flatten this object in to a Parcel.