# BluetoothClassFactory
Summary:[Ctors](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory#pubctors)\|[Methods](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory#)
# BluetoothClassFactory
`
public
class
BluetoothClassFactory
`
`
extends `[Object](https://developer.android.com/reference/java/lang/Object)`
``
`
|---|-----------------------------------------------------------|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | com.google.android.things.bluetooth.BluetoothClassFactory |
*** ** * ** ***
Builder to instantiate a[BluetoothClass](https://developer.android.com/reference/android/bluetooth/BluetoothClass.html).
## Summary
| ### Public constructors ||
|------------------------------------------------------------------------------------------------------------------------------------------------------------|---|
| ` `[BluetoothClassFactory](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory#BluetoothClassFactory())`() ` |
| ### Public methods ||
|-----------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` static `[BluetoothClass](https://developer.android.com/reference/android/bluetooth/BluetoothClass.html) | ` `[build](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory#build(int, int))`(int service, int device) ` Construct the Bluetooth Class of Device (CoD) using the Service and Device values. |
| ` static `[BluetoothClass](https://developer.android.com/reference/android/bluetooth/BluetoothClass.html) | ` `[build](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory#build(byte[]))`(byte[] classOfDeviceBytes) ` Construct the Bluetooth Class of Device (CoD) value including the[BluetoothClass.Service](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Service.html),[BluetoothClass.Device.Major](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Device.Major.html)and minor device fields. |
| ### Inherited methods |
|-----------------------|---|
| [](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory#)From class` `[java.lang.Object](https://developer.android.com/reference/java/lang/Object)` ` |--------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` `[Object](https://developer.android.com/reference/java/lang/Object) | ` `[clone](https://developer.android.com/reference/java/lang/Object#clone())`() ` Creates and returns a copy of this object. | | ` boolean` | ` `[equals](https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object))`(`[Object](https://developer.android.com/reference/java/lang/Object)` obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` `[finalize](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 `[Class](https://developer.android.com/reference/java/lang/Class)`` | ` `[getClass](https://developer.android.com/reference/java/lang/Object#getClass())`() ` Returns the runtime class of this`Object`. | | ` int` | ` `[hashCode](https://developer.android.com/reference/java/lang/Object#hashCode())`() ` Returns a hash code value for the object. | | ` final void` | ` `[notify](https://developer.android.com/reference/java/lang/Object#notify())`() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` `[notifyAll](https://developer.android.com/reference/java/lang/Object#notifyAll())`() ` Wakes up all threads that are waiting on this object's monitor. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[toString](https://developer.android.com/reference/java/lang/Object#toString())`() ` Returns a string representation of the object. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait(long, int))`(long millis, int nanos) ` Causes the current thread to wait until another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#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](https://developer.android.com/reference/java/lang/Object#wait(long))`(long millis) ` Causes the current thread to wait until either another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#notifyAll())method for this object, or a specified amount of time has elapsed. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait())`() ` Causes the current thread to wait until another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#notifyAll())method for this object. | ||
## Public constructors
### BluetoothClassFactory
```
BluetoothClassFactory ()
```
## Public methods
### build
```
BluetoothClass build (int service,
int device)
```
Construct the Bluetooth Class of Device (CoD) using the Service and Device values.[BluetoothClass.Service](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Service.html)and[BluetoothClass.Device](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Device.html)hold some common values.
| Parameters ||
|-----------|-------------------------------------------------------------------------------------|
| `service` | `int`: Service value of the CoD (bytes 13-23)
|
| `device` | `int`: Combined device value, including Major and Minor values. (bytes 2-12)
|
| Returns ||
|-------------------------------------------------------------------------------------------------|---------------------------------------------------------------------|
| [BluetoothClass](https://developer.android.com/reference/android/bluetooth/BluetoothClass.html) | BluetoothClass which represents the specified device values.
|
**See also:**
- [BluetoothClass.Service](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Service.html)
- [BluetoothClass.Device](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Device.html)
- [BluetoothClass.Device.Major](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Device.Major.html)
- [Bluetooth CoD](https://www.bluetooth.com/specifications/assigned-numbers/baseband)
### build
```
BluetoothClass build (byte[] classOfDeviceBytes)
```
Construct the Bluetooth Class of Device (CoD) value including the[BluetoothClass.Service](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Service.html),[BluetoothClass.Device.Major](https://developer.android.com/reference/android/bluetooth/BluetoothClass.Device.Major.html)and minor device fields.
The byte representation of CoD are the Bluetooth Service, Device Major and Minor field from left to right, ie. MSB to LSB. Byte 0 is MSB and Byte 2 is LSB.
For eg., the byte representation of the Class of Device for an Audio Speaker is 0x200414. The parameters for it would be {0x20, 0x04, 0x14}.
| Parameters ||
|----------------------|------------------------------------------------------------------------------------------------------|
| `classOfDeviceBytes` | `byte`: Byte representation of Bluetooth CoD as in the Bluetooth specification. 3 byte array.
|
| Returns ||
|-------------------------------------------------------------------------------------------------|--------|
| [BluetoothClass](https://developer.android.com/reference/android/bluetooth/BluetoothClass.html) |
|
**See also:**
- [Bluetooth CoD](https://www.bluetooth.com/specifications/assigned-numbers/baseband)
-
## Interfaces
- [BluetoothConnectionCallback](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothConnectionCallback)
- [BluetoothPairingCallback](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothPairingCallback)
-
## Classes
- [BluetoothClassFactory](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothClassFactory)
- [BluetoothConfigManager](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothConfigManager)
- [BluetoothConnectionManager](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothConnectionManager)
- [BluetoothPairingCallback.PairingError](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothPairingCallback.PairingError)
- [BluetoothProfile](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothProfile)
- [BluetoothProfileManager](https://developer.android.com/reference/com/google/android/things/bluetooth/BluetoothProfileManager)
- [ConnectionParams](https://developer.android.com/reference/com/google/android/things/bluetooth/ConnectionParams)
- [PairingParams](https://developer.android.com/reference/com/google/android/things/bluetooth/PairingParams)