Added in API level 5

Summary: Nested Classes | Constants | Inherited Constants | Fields | Methods | Inherited Methods

BluetoothClass

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Kotlin |Java

public final class BluetoothClass
extends Object implements Parcelable

java.lang.Object
↳	android.bluetooth.BluetoothClass

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Represents a Bluetooth class, which describes general characteristics and capabilities of a device. For example, a Bluetooth class will specify the general device type such as a phone, a computer, or headset, and whether it's capable of services such as audio or telephony.

Every Bluetooth class is composed of zero or more service classes, and exactly one device class. The device class is further broken down into major and minor device class components.

BluetoothClass is useful as a hint to roughly describe a device (for example to show an icon in the UI), but does not reliably describe which Bluetooth profiles or services are actually supported by a device. Accurate service discovery is done through SDP requests, which are automatically performed when creating an RFCOMM socket with BluetoothDevice.createRfcommSocketToServiceRecord(UUID) and BluetoothAdapter.listenUsingRfcommWithServiceRecord(String, UUID)

Use BluetoothDevice#getBluetoothClass to retrieve the class for a remote device.

Summary

Nested classes
class	BluetoothClass.Device Defines all device class constants.
class	BluetoothClass.Service Defines all service class constants.

Constants
int	PROFILE_A2DP
int	PROFILE_HEADSET
int	PROFILE_HID

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<BluetoothClass>	CREATOR

Public methods
int	describeContents() Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
boolean	doesClassMatch(int profile) Check class bits for possible bluetooth profile support.
boolean	equals(Object o) Indicates whether some other object is "equal to" this one.
int	getDeviceClass() Return the (major and minor) device class component of this BluetoothClass.
int	getMajorDeviceClass() Return the major device class component of this BluetoothClass.
boolean	hasService(int service) Return true if the specified service class is supported by this BluetoothClass.
int	hashCode() Returns a hash code value for the object.
String	toString() Returns a string representation of the object.
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 timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
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

PROFILE_A2DP

Added in API level 33

public static final int PROFILE_A2DP

Constant Value: 1 (0x00000001)

PROFILE_HEADSET

Added in API level 33

public static final int PROFILE_HEADSET

Constant Value: 0 (0x00000000)

PROFILE_HID

Added in API level 33

public static final int PROFILE_HID

Constant Value: 3 (0x00000003)

Fields

CREATOR

Added in API level 5

public static final Creator<BluetoothClass> CREATOR

Public methods

describeContents

Added in API level 5

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

doesClassMatch

Added in API level 33

public boolean doesClassMatch (int profile)

Check class bits for possible bluetooth profile support. This is a simple heuristic that tries to guess if a device with the given class bits might support specified profile. It is not accurate for all devices. It tries to err on the side of false positives.

Parameters
profile	int: the profile to be checked

Returns
boolean	whether this device supports specified profile

equals

Added in API level 5

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.

Parameters
o	Object: This value may be null.

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

getDeviceClass

Added in API level 5

public int getDeviceClass ()

Return the (major and minor) device class component of this BluetoothClass.

Values returned from this function can be compared with the public constants in BluetoothClass.Device to determine which device class is encoded in this Bluetooth class.

Returns
int	device class component

getMajorDeviceClass

Added in API level 5

public int getMajorDeviceClass ()

Return the major device class component of this BluetoothClass.

Values returned from this function can be compared with the public constants in BluetoothClass.Device.Major to determine which major class is encoded in this Bluetooth class.

Returns
int	major device class component

hasService

Added in API level 5

public boolean hasService (int service)

Return true if the specified service class is supported by this BluetoothClass.

Valid service classes are the public constants in BluetoothClass.Service. For example, BluetoothClass.Service#AUDIO.

Parameters
service	int: valid service class

Returns
boolean	true if the service class is supported

hashCode

Added in API level 5

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.

Returns
int	a hash code value for this object.

toString

Added in API level 5

public String toString ()

Returns a string representation of the object.

Returns
String	a string representation of the object.

writeToParcel

Added in API level 5

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. This value cannot be null.
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