# AdvertiseCallback
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
Summary:[Constants](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#constants)\|[Ctors](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#pubctors)\|[Methods](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#inhmethods)
# AdvertiseCallback
*** ** * ** ***
[Kotlin](https://developer.android.com/reference/kotlin/android/bluetooth/le/AdvertiseCallback "View this page in Kotlin")\|Java
`
public
abstract
class
AdvertiseCallback
`
`
extends `[Object](https://developer.android.com/reference/java/lang/Object)`
``
`
|---|----------------------------------------|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.bluetooth.le.AdvertiseCallback |
*** ** * ** ***
Bluetooth LE advertising callbacks, used to deliver advertising operation status.
## Summary
| ### Constants ||
|-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `int` | [ADVERTISE_FAILED_ALREADY_STARTED](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#ADVERTISE_FAILED_ALREADY_STARTED) Failed to start advertising as the advertising is already started. |
| `int` | [ADVERTISE_FAILED_DATA_TOO_LARGE](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#ADVERTISE_FAILED_DATA_TOO_LARGE) Failed to start advertising as the advertise data to be broadcasted is larger than 31 bytes. |
| `int` | [ADVERTISE_FAILED_FEATURE_UNSUPPORTED](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#ADVERTISE_FAILED_FEATURE_UNSUPPORTED) This feature is not supported on this platform. |
| `int` | [ADVERTISE_FAILED_INTERNAL_ERROR](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#ADVERTISE_FAILED_INTERNAL_ERROR) Operation failed due to an internal error. |
| `int` | [ADVERTISE_FAILED_TOO_MANY_ADVERTISERS](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#ADVERTISE_FAILED_TOO_MANY_ADVERTISERS) Failed to start advertising because no advertising instance is available. |
| ### Public constructors ||
|---------------------------------------------------------------------------------------------------------------------------------|---|
| ` `[AdvertiseCallback](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#AdvertiseCallback())`() ` |
| ### Public methods ||
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` void` | ` `[onStartFailure](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#onStartFailure(int))`(int errorCode) ` Callback when advertising could not be started. |
| ` void` | ` `[onStartSuccess](https://developer.android.com/reference/android/bluetooth/le/AdvertiseCallback#onStartSuccess(android.bluetooth.le.AdvertiseSettings))`(`[AdvertiseSettings](https://developer.android.com/reference/android/bluetooth/le/AdvertiseSettings)` settingsInEffect) ` Callback triggered in response to[BluetoothLeAdvertiser.startAdvertising](https://developer.android.com/reference/android/bluetooth/le/BluetoothLeAdvertiser#startAdvertising(android.bluetooth.le.AdvertiseSettings,%20android.bluetooth.le.AdvertiseData,%20android.bluetooth.le.AdvertiseCallback))indicating that the advertising has been started successfully. |
| ### Inherited methods |
|-----------------------|---|
| 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,%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` | ` `[wait](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` | ` `[wait](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*. | ||
## Constants
### ADVERTISE_FAILED_ALREADY_STARTED
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public static final int ADVERTISE_FAILED_ALREADY_STARTED
```
Failed to start advertising as the advertising is already started.
Constant Value: 3 (0x00000003)
### ADVERTISE_FAILED_DATA_TOO_LARGE
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public static final int ADVERTISE_FAILED_DATA_TOO_LARGE
```
Failed to start advertising as the advertise data to be broadcasted is larger than 31 bytes.
Constant Value: 1 (0x00000001)
### ADVERTISE_FAILED_FEATURE_UNSUPPORTED
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public static final int ADVERTISE_FAILED_FEATURE_UNSUPPORTED
```
This feature is not supported on this platform.
Constant Value: 5 (0x00000005)
### ADVERTISE_FAILED_INTERNAL_ERROR
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public static final int ADVERTISE_FAILED_INTERNAL_ERROR
```
Operation failed due to an internal error.
Constant Value: 4 (0x00000004)
### ADVERTISE_FAILED_TOO_MANY_ADVERTISERS
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public static final int ADVERTISE_FAILED_TOO_MANY_ADVERTISERS
```
Failed to start advertising because no advertising instance is available.
Constant Value: 2 (0x00000002)
## Public constructors
### AdvertiseCallback
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public AdvertiseCallback ()
```
## Public methods
### onStartFailure
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onStartFailure (int errorCode)
```
Callback when advertising could not be started.
| Parameters ||
|-------------|----------------------------------------------------------------------------------------------|
| `errorCode` | `int`: Error code (see ADVERTISE_FAILED_\* constants) for advertising start failures.
|
### onStartSuccess
Added in[API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onStartSuccess (AdvertiseSettings settingsInEffect)
```
Callback triggered in response to[BluetoothLeAdvertiser.startAdvertising](https://developer.android.com/reference/android/bluetooth/le/BluetoothLeAdvertiser#startAdvertising(android.bluetooth.le.AdvertiseSettings,%20android.bluetooth.le.AdvertiseData,%20android.bluetooth.le.AdvertiseCallback))indicating that the advertising has been started successfully.
| Parameters ||
|--------------------|----------------------------------------------------------------------------------------------------------------------------|
| `settingsInEffect` | `AdvertiseSettings`: The actual settings used for advertising, which may be different from what has been requested.
|