Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Nested Classes](https://developer.android.com/reference/android/bluetooth/BluetoothClass#nestedclasses) \| [Constants](https://developer.android.com/reference/android/bluetooth/BluetoothClass#constants) \| [Inherited Constants](https://developer.android.com/reference/android/bluetooth/BluetoothClass#inhconstants) \| [Fields](https://developer.android.com/reference/android/bluetooth/BluetoothClass#lfields) \| [Methods](https://developer.android.com/reference/android/bluetooth/BluetoothClass#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/bluetooth/BluetoothClass#inhmethods)

# BluetoothClass

*** ** * ** ***

[Kotlin](https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothClass "View this page in Kotlin") \|Java


`
public

final

class
BluetoothClass
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


implements

https://developer.android.com/reference/android/os/Parcelable


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.bluetooth.BluetoothClass |

<br />

*** ** * ** ***

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.

`https://developer.android.com/reference/android/bluetooth/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 `https://developer.android.com/reference/android/bluetooth/BluetoothDevice#createRfcommSocketToServiceRecord(java.util.UUID)` and `https://developer.android.com/reference/android/bluetooth/BluetoothAdapter#listenUsingRfcommWithServiceRecord(java.lang.String,%20java.util.UUID)`

Use `https://developer.android.com/reference/android/bluetooth/BluetoothDevice#getBluetoothClass()` to retrieve the class for a remote device.

## Summary

| ### Nested classes ||
|---|---|
| ` class` | `https://developer.android.com/reference/android/bluetooth/BluetoothClass.Device` Defines all device class constants. |
| ` class` | `https://developer.android.com/reference/android/bluetooth/BluetoothClass.Service` Defines all service class constants. |

| ### Constants ||
|---|---|
| `int` | `https://developer.android.com/reference/android/bluetooth/BluetoothClass#PROFILE_A2DP` |
| `int` | `https://developer.android.com/reference/android/bluetooth/BluetoothClass#PROFILE_HEADSET` |
| `int` | `https://developer.android.com/reference/android/bluetooth/BluetoothClass#PROFILE_HID` |

| ### Inherited constants |
|---|
| From interface `https://developer.android.com/reference/android/os/Parcelable` |---|---| | `int` | `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `https://developer.android.com/reference/android/os/Parcelable#describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor. | | `int` | `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)`: 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 https://developer.android.com/reference/android/os/Parcelable.Creator<https://developer.android.com/reference/android/bluetooth/BluetoothClass>` | `https://developer.android.com/reference/android/bluetooth/BluetoothClass#CREATOR` |

| ### Public methods ||
|---|---|
| ` int` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#describeContents()() ` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
| ` boolean` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#doesClassMatch(int)(int profile) ` Check class bits for possible bluetooth profile support. |
| ` boolean` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object o) ` Indicates whether some other object is "equal to" this one. |
| ` int` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#getDeviceClass()() ` Return the (major and minor) device class component of this `https://developer.android.com/reference/android/bluetooth/BluetoothClass`. |
| ` int` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#getMajorDeviceClass()() ` Return the major device class component of this `https://developer.android.com/reference/android/bluetooth/BluetoothClass`. |
| ` boolean` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#hasService(int)(int service) ` Return true if the specified service class is supported by this `https://developer.android.com/reference/android/bluetooth/BluetoothClass`. |
| ` int` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#hashCode()() ` Returns a hash code value for the object. |
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#toString()() ` Returns a string representation of the object. |
| ` void` | ` https://developer.android.com/reference/android/bluetooth/BluetoothClass#writeToParcel(android.os.Parcel,%20int)(https://developer.android.com/reference/android/os/Parcel out, int flags) ` Flatten this object in to a Parcel. |

| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class<?>` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(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` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(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` | ` https://developer.android.com/reference/java/lang/Object#wait()() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||
| From interface ` https://developer.android.com/reference/android/os/Parcelable ` |---|---| | ` abstract int` | ` https://developer.android.com/reference/android/os/Parcelable#describeContents()() ` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. | | ` abstract void` | ` https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)(https://developer.android.com/reference/android/os/Parcel dest, int flags) ` Flatten this object in to a Parcel. | ||

## Constants

### PROFILE_A2DP

Added in [API level 33](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final int PROFILE_A2DP
```

<br />

<br />

Constant Value:

1
(0x00000001)


### PROFILE_HEADSET

Added in [API level 33](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final int PROFILE_HEADSET
```

<br />

<br />

Constant Value:

0
(0x00000000)


### PROFILE_HID

Added in [API level 33](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final int PROFILE_HID
```

<br />

<br />

Constant Value:

3
(0x00000003)


## Fields

### CREATOR

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final Creator<BluetoothClass> CREATOR
```

<br />

<br />

## Public methods

### describeContents

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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 `https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)`,
the return value of this method must include the
`https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` bit.

<br />

| Returns ||
|---|---|
| `int` | a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or - `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` |

### doesClassMatch

Added in [API level 33](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

| Parameters ||
|---|---|
| `profile` | `int`: the profile to be checked <br /> |

| Returns ||
|---|---|
| `boolean` | whether this device supports specified profile <br /> |

### equals

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

| Parameters ||
|---|---|
| `o` | `Object`: This value may be `null`. <br /> |

| Returns ||
|---|---|
| `boolean` | `true` if this object is the same as the obj argument; `false` otherwise. <br /> |

### getDeviceClass

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getDeviceClass ()
```

Return the (major and minor) device class component of this `https://developer.android.com/reference/android/bluetooth/BluetoothClass`.

Values returned from this function can be compared with the public constants in `https://developer.android.com/reference/android/bluetooth/BluetoothClass.Device` to determine which device class is encoded in this Bluetooth class.

<br />

| Returns ||
|---|---|
| `int` | device class component <br /> |

### getMajorDeviceClass

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getMajorDeviceClass ()
```

Return the major device class component of this `https://developer.android.com/reference/android/bluetooth/BluetoothClass`.

Values returned from this function can be compared with the public constants in `https://developer.android.com/reference/android/bluetooth/BluetoothClass.Device.Major` to determine which major class is encoded in this Bluetooth
class.

<br />

| Returns ||
|---|---|
| `int` | major device class component <br /> |

### hasService

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean hasService (int service)
```

Return true if the specified service class is supported by this `https://developer.android.com/reference/android/bluetooth/BluetoothClass`.

Valid service classes are the public constants in `https://developer.android.com/reference/android/bluetooth/BluetoothClass.Service`. For
example, `https://developer.android.com/reference/android/bluetooth/BluetoothClass.Service#AUDIO`.

<br />

| Parameters ||
|---|---|
| `service` | `int`: valid service class <br /> |

| Returns ||
|---|---|
| `boolean` | true if the service class is supported <br /> |

### hashCode

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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
`https://developer.android.com/reference/java/util/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 `https://developer.android.com/reference/java/lang/Object#equals(java.lang.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 `https://developer.android.com/reference/java/lang/Object#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.

<br />

<br />

| Returns ||
|---|---|
| `int` | a hash code value for this object. <br /> |

### toString

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String toString ()
```

Returns a string representation of the object.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | a string representation of the object. <br /> |

### writeToParcel

Added in [API level 5](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void writeToParcel (Parcel out, 
                int flags)
```

Flatten this object in to a Parcel.

<br />

| Parameters ||
|---|---|
| `out` | `Parcel`: The Parcel in which the object should be written. This value cannot be `null`. <br /> |
| `flags` | `int`: Additional flags about how the object should be written. May be 0 or `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of the following: - `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE` |