# RemoteConference.Callback
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
Summary:[Ctors](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#pubctors)\|[Methods](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#inhmethods)
# RemoteConference.Callback
*** ** * ** ***
[Kotlin](https://developer.android.com/reference/kotlin/android/telecom/RemoteConference.Callback "View this page in Kotlin")\|Java
`
public
static
abstract
class
RemoteConference.Callback
`
`
extends `[Object](https://developer.android.com/reference/java/lang/Object)`
``
`
|---|-------------------------------------------|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.telecom.RemoteConference.Callback |
*** ** * ** ***
Callback base class for[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference).
## Summary
| ### Public constructors ||
|------------------------------------------------------------------------------------------------------------------|---|
| ` `[Callback](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#Callback())`() ` |
| ### Public methods ||
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` void` | ` `[onConferenceableConnectionsChanged](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onConferenceableConnectionsChanged(android.telecom.RemoteConference,%20java.util.List))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference, `[List](https://developer.android.com/reference/java/util/List)`<`[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)`> conferenceableConnections) ` Invoked when the set of[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)s which can be added to this conference call have changed. |
| ` void` | ` `[onConnectionAdded](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onConnectionAdded(android.telecom.RemoteConference,%20android.telecom.RemoteConnection))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference, `[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)` connection) ` Invoked when a[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)is added to the conference call. |
| ` void` | ` `[onConnectionCapabilitiesChanged](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onConnectionCapabilitiesChanged(android.telecom.RemoteConference,%20int))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference, int connectionCapabilities) ` Indicates that the call capabilities of this`RemoteConference`have changed. |
| ` void` | ` `[onConnectionPropertiesChanged](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onConnectionPropertiesChanged(android.telecom.RemoteConference,%20int))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference, int connectionProperties) ` Indicates that the call properties of this`RemoteConference`have changed. |
| ` void` | ` `[onConnectionRemoved](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onConnectionRemoved(android.telecom.RemoteConference,%20android.telecom.RemoteConnection))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference, `[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)` connection) ` Invoked when a[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)is removed from the conference call. |
| ` void` | ` `[onDestroyed](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onDestroyed(android.telecom.RemoteConference))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference) ` Indicates that this`RemoteConference`has been destroyed. |
| ` void` | ` `[onDisconnected](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onDisconnected(android.telecom.RemoteConference,%20android.telecom.DisconnectCause))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference, `[DisconnectCause](https://developer.android.com/reference/android/telecom/DisconnectCause)` disconnectCause) ` Invoked when this`RemoteConference`is disconnected. |
| ` void` | ` `[onExtrasChanged](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onExtrasChanged(android.telecom.RemoteConference,%20android.os.Bundle))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference, `[Bundle](https://developer.android.com/reference/android/os/Bundle)` extras) ` Handles changes to the`RemoteConference`extras. |
| ` void` | ` `[onStateChanged](https://developer.android.com/reference/android/telecom/RemoteConference.Callback#onStateChanged(android.telecom.RemoteConference,%20int,%20int))`(`[RemoteConference](https://developer.android.com/reference/android/telecom/RemoteConference)` conference, int oldState, int newState) ` Invoked when the state of this`RemoteConferece`has changed. |
| ### 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*. | ||
## Public constructors
### Callback
```
public Callback ()
```
## Public methods
### onConferenceableConnectionsChanged
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onConferenceableConnectionsChanged (RemoteConference conference,
List conferenceableConnections)
```
Invoked when the set of[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)s which can be added to this conference call have changed.
| Parameters ||
|-----------------------------|-----------------------------------------------------------------------------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
| `conferenceableConnections` | `List`: The list of conferenceable[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)s.
|
### onConnectionAdded
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onConnectionAdded (RemoteConference conference,
RemoteConnection connection)
```
Invoked when a[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)is added to the conference call.
| Parameters ||
|--------------|----------------------------------------------------------------------------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
| `connection` | `RemoteConnection`: The[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)being added.
|
### onConnectionCapabilitiesChanged
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onConnectionCapabilitiesChanged (RemoteConference conference,
int connectionCapabilities)
```
Indicates that the call capabilities of this`RemoteConference`have changed. See[RemoteConference.getConnectionCapabilities()](https://developer.android.com/reference/android/telecom/RemoteConference#getConnectionCapabilities()).
| Parameters ||
|--------------------------|-----------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
| `connectionCapabilities` | `int`: The new capabilities of the`RemoteConference`.
|
### onConnectionPropertiesChanged
Added in[API level 25](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onConnectionPropertiesChanged (RemoteConference conference,
int connectionProperties)
```
Indicates that the call properties of this`RemoteConference`have changed. See[RemoteConference.getConnectionProperties()](https://developer.android.com/reference/android/telecom/RemoteConference#getConnectionProperties()).
| Parameters ||
|------------------------|-----------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
| `connectionProperties` | `int`: The new properties of the`RemoteConference`.
|
### onConnectionRemoved
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onConnectionRemoved (RemoteConference conference,
RemoteConnection connection)
```
Invoked when a[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)is removed from the conference call.
| Parameters ||
|--------------|------------------------------------------------------------------------------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
| `connection` | `RemoteConnection`: The[RemoteConnection](https://developer.android.com/reference/android/telecom/RemoteConnection)being removed.
|
### onDestroyed
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onDestroyed (RemoteConference conference)
```
Indicates that this`RemoteConference`has been destroyed. No further requests should be made to the`RemoteConference`, and references to it should be cleared.
| Parameters ||
|--------------|-----------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
### onDisconnected
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onDisconnected (RemoteConference conference,
DisconnectCause disconnectCause)
```
Invoked when this`RemoteConference`is disconnected.
| Parameters ||
|-------------------|--------------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
| `disconnectCause` | `DisconnectCause`: The () associated with this failed conference.
|
### onExtrasChanged
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onExtrasChanged (RemoteConference conference,
Bundle extras)
```
Handles changes to the`RemoteConference`extras.
| Parameters ||
|--------------|-------------------------------------------------------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
| `extras` | `Bundle`: The extras containing other information associated with the conference. This value may be`null`.
|
### onStateChanged
Added in[API level 23](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void onStateChanged (RemoteConference conference,
int oldState,
int newState)
```
Invoked when the state of this`RemoteConferece`has changed. See[RemoteConference.getState()](https://developer.android.com/reference/android/telecom/RemoteConference#getState()).
| Parameters ||
|--------------|-----------------------------------------------------------------------|
| `conference` | `RemoteConference`: The`RemoteConference`invoking this method.
|
| `oldState` | `int`: The previous state of the`RemoteConference`.
|
| `newState` | `int`: The new state of the`RemoteConference`.
|