Added in API level 23

Summary: Constants | Ctors | Methods | Inherited Methods

Call.Callback

Kotlin |Java

public static abstract class Call.Callback
extends Object

java.lang.Object
↳	android.telecom.Call.Callback

Defines callbacks which inform the InCallService of changes to a Call. These callbacks can originate from the Telecom framework, or a ConnectionService implementation.

You can handle these callbacks by extending the Callback class and overriding the callbacks that your InCallService is interested in. The callback methods include the Call for which the callback applies, allowing reuse of a single instance of your Callback implementation, if desired.

Use Call#registerCallback(Callback) to register your callback(s). Ensure Call#unregisterCallback(Callback) is called when you no longer require callbacks (typically in InCallService#onCallRemoved(Call)). Note: Callbacks which occur before you call Call#registerCallback(Callback) will not reach your implementation of Callback, so it is important to register your callback as soon as your InCallService is notified of a new call via InCallService#onCallAdded(Call).

Summary

Constants
`int`	`HANDOVER_FAILURE_DEST_APP_REJECTED` Handover failure reason returned via `onHandoverFailed(android.telecom.Call, int)` when the app to handover the call to rejects the handover request.
`int`	`HANDOVER_FAILURE_NOT_SUPPORTED` Handover failure reason returned via `onHandoverFailed(android.telecom.Call, int)` when a handover is initiated but the source or destination app does not support handover.
`int`	`HANDOVER_FAILURE_ONGOING_EMERGENCY_CALL` Handover failure reason returned via `onHandoverFailed(android.telecom.Call, int)` when there is ongoing emergency call.
`int`	`HANDOVER_FAILURE_UNKNOWN` Handover failure reason returned via `onHandoverFailed(android.telecom.Call, int)` when a handover fails for an unknown reason.
`int`	`HANDOVER_FAILURE_USER_REJECTED` Handover failure reason returned via `onHandoverFailed(android.telecom.Call, int)` when the remote user rejects the handover request.

Public constructors
`Callback()`

Public methods
`void`	`onCallDestroyed(Call call)` Invoked when the `Call` is destroyed.
`void`	`onCannedTextResponsesLoaded(Call call, List<String> cannedTextResponses)` Invoked when the text messages that can be used as responses to the incoming `Call` are loaded from the relevant database.
`void`	`onChildrenChanged(Call call, List<Call> children)` Invoked when the children of this `Call` have changed.
`void`	`onConferenceableCallsChanged(Call call, List<Call> conferenceableCalls)` Invoked upon changes to the set of `Call`s with which this `Call` can be conferenced.
`void`	`onConnectionEvent(Call call, String event, Bundle extras)` Invoked when a `Call` receives an event from its associated `Connection` or `Conference`.
`void`	`onDetailsChanged(Call call, Call.Details details)` Invoked when the details of this `Call` have changed.
`void`	`onHandoverComplete(Call call)` Invoked when Call handover from one `PhoneAccount` to other `PhoneAccount` has completed successfully.
`void`	`onHandoverFailed(Call call, int failureReason)` Invoked when Call handover from one `PhoneAccount` to other `PhoneAccount` has failed.
`void`	`onParentChanged(Call call, Call parent)` Invoked when the parent of this `Call` has changed.
`void`	`onPostDialWait(Call call, String remainingPostDialSequence)` Invoked when the post-dial sequence in the outgoing `Call` has reached a pause character.
`void`	`onRttInitiationFailure(Call call, int reason)` Invoked when the RTT session failed to initiate for some reason, including rejection by the remote party.
`void`	`onRttModeChanged(Call call, int mode)` Invoked when the RTT mode changes for this call.
`void`	`onRttRequest(Call call, int id)` Invoked when the remote end of the connection has requested that an RTT communication channel be opened.
`void`	`onRttStatusChanged(Call call, boolean enabled, Call.RttCall rttCall)` Invoked when the call's RTT status changes, either from off to on or from on to off.
`void`	`onStateChanged(Call call, int state)` Invoked when the state of this `Call` has changed.
`void`	`onVideoCallChanged(Call call, InCallService.VideoCall videoCall)` Invoked when the `Call.VideoCall` of the `Call` has changed.

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.

Constants

HANDOVER_FAILURE_DEST_APP_REJECTED

Added in API level 28

public static final int HANDOVER_FAILURE_DEST_APP_REJECTED

Handover failure reason returned via onHandoverFailed(android.telecom.Call, int) when the app to handover the call to rejects the handover request.

Will be returned when Call#handoverTo(PhoneAccountHandle, int, Bundle) is called and the destination PhoneAccountHandle's ConnectionService returns a null Connection from ConnectionService#onCreateOutgoingHandoverConnection(PhoneAccountHandle, ConnectionRequest).

For more information on call handovers, see Call.handoverTo(android.telecom.PhoneAccountHandle, int, android.os.Bundle).

Constant Value: 1 (0x00000001)

HANDOVER_FAILURE_NOT_SUPPORTED

Added in API level 28

public static final int HANDOVER_FAILURE_NOT_SUPPORTED

Handover failure reason returned via onHandoverFailed(android.telecom.Call, int) when a handover is initiated but the source or destination app does not support handover.

Will be returned when a handover is requested via Call.handoverTo(android.telecom.PhoneAccountHandle, int, android.os.Bundle) and the destination PhoneAccountHandle does not declare PhoneAccount#EXTRA_SUPPORTS_HANDOVER_TO. May also be returned when a handover is requested at the PhoneAccountHandle for the current call (i.e. the source call's Details#getAccountHandle()) does not declare PhoneAccount#EXTRA_SUPPORTS_HANDOVER_FROM.

For more information on call handovers, see Call.handoverTo(android.telecom.PhoneAccountHandle, int, android.os.Bundle).

Constant Value: 2 (0x00000002)

HANDOVER_FAILURE_ONGOING_EMERGENCY_CALL

Added in API level 28

public static final int HANDOVER_FAILURE_ONGOING_EMERGENCY_CALL

Handover failure reason returned via onHandoverFailed(android.telecom.Call, int) when there is ongoing emergency call.

This error code is returned when Call.handoverTo(android.telecom.PhoneAccountHandle, int, android.os.Bundle) is called on an emergency call, or if any other call is an emergency call.

Handovers are not permitted while there are ongoing emergency calls.

For more information on call handovers, see Call.handoverTo(android.telecom.PhoneAccountHandle, int, android.os.Bundle).

Constant Value: 4 (0x00000004)

HANDOVER_FAILURE_UNKNOWN

Added in API level 28

public static final int HANDOVER_FAILURE_UNKNOWN

Handover failure reason returned via onHandoverFailed(android.telecom.Call, int) when a handover fails for an unknown reason.

For more information on call handovers, see Call.handoverTo(android.telecom.PhoneAccountHandle, int, android.os.Bundle).

Constant Value: 5 (0x00000005)

HANDOVER_FAILURE_USER_REJECTED

Added in API level 28

public static final int HANDOVER_FAILURE_USER_REJECTED

Handover failure reason returned via onHandoverFailed(android.telecom.Call, int) when the remote user rejects the handover request.

For more information on call handovers, see Call.handoverTo(android.telecom.PhoneAccountHandle, int, android.os.Bundle).

Constant Value: 3 (0x00000003)

Public constructors

Callback

public Callback ()

Public methods

onCallDestroyed

Added in API level 23

public void onCallDestroyed (Call call)

Invoked when the Call is destroyed. Clients should refrain from cleaning up their UI for the Call in response to state transitions. Specifically, clients should not assume that a onStateChanged(android.telecom.Call, int) with a state of Call.STATE_DISCONNECTED is the final notification the Call will send. Rather, clients should wait for this method to be invoked.

Parameters
`call`	`Call`: The `Call` being destroyed.

onCannedTextResponsesLoaded

Added in API level 23

public void onCannedTextResponsesLoaded (Call call, 
                List<String> cannedTextResponses)

Invoked when the text messages that can be used as responses to the incoming Call are loaded from the relevant database. See Call.getCannedTextResponses().

Parameters
`call`	`Call`: The `Call` invoking this method.
`cannedTextResponses`	`List`: The text messages useable as responses.

onChildrenChanged

Added in API level 23

public void onChildrenChanged (Call call, 
                List<Call> children)

Invoked when the children of this Call have changed. See Call.getChildren().

Parameters
`call`	`Call`: The `Call` invoking this method.
`children`	`List`: The new children of the `Call`.

onConferenceableCallsChanged

Added in API level 23

public void onConferenceableCallsChanged (Call call, 
                List<Call> conferenceableCalls)

Invoked upon changes to the set of Calls with which this Call can be conferenced.

Parameters
`call`	`Call`: The `Call` being updated.
`conferenceableCalls`	`List`: The `Call`s with which this `Call` can be conferenced.

onConnectionEvent

Added in API level 25

public void onConnectionEvent (Call call, 
                String event, 
                Bundle extras)

Invoked when a Call receives an event from its associated Connection or Conference.

Where possible, the Call should make an attempt to handle Connection events which are part of the android.telecom.* namespace. The Call should ignore any events it does not wish to handle. Unexpected events should be handled gracefully, as it is possible that a ConnectionService has defined its own Connection events which a Call is not aware of.

See Connection#sendConnectionEvent(String, Bundle), Conference#sendConferenceEvent(String, Bundle).

Parameters
`call`	`Call`: The `Call` receiving the event.
`event`	`String`: The event.
`extras`	`Bundle`: Extras associated with the connection event.

onDetailsChanged

Added in API level 23

public void onDetailsChanged (Call call, 
                Call.Details details)

Invoked when the details of this Call have changed. See Call.getDetails().

Parameters
`call`	`Call`: The `Call` invoking this method.
`details`	`Call.Details`: A `Details` object describing the `Call`.

onHandoverComplete

Added in API level 28

public void onHandoverComplete (Call call)

Invoked when Call handover from one PhoneAccount to other PhoneAccount has completed successfully.

For a full discussion of the handover process and the APIs involved, see Call.handoverTo(PhoneAccountHandle, int, Bundle).

Parameters
`call`	`Call`: The call which had initiated handover.

onHandoverFailed

Added in API level 28

public void onHandoverFailed (Call call, 
                int failureReason)

Invoked when Call handover from one PhoneAccount to other PhoneAccount has failed.

For a full discussion of the handover process and the APIs involved, see Call.handoverTo(PhoneAccountHandle, int, Bundle).

Parameters
`call`	`Call`: The call which had initiated handover.
`failureReason`	`int`: Error reason for failure. Value is `HANDOVER_FAILURE_DEST_APP_REJECTED`, `HANDOVER_FAILURE_NOT_SUPPORTED`, `HANDOVER_FAILURE_USER_REJECTED`, `HANDOVER_FAILURE_ONGOING_EMERGENCY_CALL`, or `HANDOVER_FAILURE_UNKNOWN`

onParentChanged

Added in API level 23

public void onParentChanged (Call call, 
                Call parent)

Invoked when the parent of this Call has changed. See Call.getParent().

Parameters
`call`	`Call`: The `Call` invoking this method.
`parent`	`Call`: The new parent of the `Call`.

onPostDialWait

Added in API level 23

public void onPostDialWait (Call call, 
                String remainingPostDialSequence)

Invoked when the post-dial sequence in the outgoing Call has reached a pause character. This causes the post-dial signals to stop pending user confirmation. An implementation should present this choice to the user and invoke Call.postDialContinue(boolean) when the user makes the choice.

Parameters
`call`	`Call`: The `Call` invoking this method.
`remainingPostDialSequence`	`String`: The post-dial characters that remain to be sent.

onRttInitiationFailure

Added in API level 26

public void onRttInitiationFailure (Call call, 
                int reason)

Invoked when the RTT session failed to initiate for some reason, including rejection by the remote party.

This callback will ONLY be invoked to report a failure related to a user initiated session modification request (i.e. Call#sendRttRequest()).

If a call is initiated with TelecomManager#EXTRA_START_CALL_WITH_RTT specified, the availability of RTT can be determined by checking Details#PROPERTY_RTT once the call enters state Details#STATE_ACTIVE.

Parameters

Parameters
`call`	`Call`: The call which the RTT initiation failure occurred on.
`reason`	`int`: One of the status codes defined in `Connection.RttModifyStatus`, with the exception of `Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_SUCCESS`. Value is `Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_SUCCESS`, `Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_FAIL`, `Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_INVALID`, `Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_TIMED_OUT`, or `Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_REJECTED_BY_REMOTE`

call

Call: The call which the RTT initiation failure occurred on.

reason

int: One of the status codes defined in Connection.RttModifyStatus, with the exception of Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_SUCCESS. Value is Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_SUCCESS, Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_FAIL, Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_INVALID, Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_TIMED_OUT, or Connection.RttModifyStatus.SESSION_MODIFY_REQUEST_REJECTED_BY_REMOTE

onRttModeChanged

Added in API level 26

public void onRttModeChanged (Call call, 
                int mode)

Invoked when the RTT mode changes for this call.

Parameters
`call`	`Call`: The call whose RTT mode has changed.
`mode`	`int`: the new RTT mode, one of `RttCall#RTT_MODE_FULL`, `RttCall#RTT_MODE_HCO`, or `RttCall#RTT_MODE_VCO`

onRttRequest

Added in API level 26

public void onRttRequest (Call call, 
                int id)

Invoked when the remote end of the connection has requested that an RTT communication channel be opened. A response to this should be sent via Call.respondToRttRequest(int, boolean) with the same ID that this method is invoked with.

Parameters
`call`	`Call`: The call which the RTT request was placed on
`id`	`int`: The ID of the request.

onRttStatusChanged

Added in API level 26

public void onRttStatusChanged (Call call, 
                boolean enabled, 
                Call.RttCall rttCall)

Invoked when the call's RTT status changes, either from off to on or from on to off.

Parameters
`call`	`Call`: The call whose RTT status has changed.
`enabled`	`boolean`: whether RTT is now enabled or disabled
`rttCall`	`Call.RttCall`: the `RttCall` object to use for reading and writing if RTT is now on, null otherwise.

onStateChanged

Added in API level 23

public void onStateChanged (Call call, 
                int state)

Invoked when the state of this Call has changed. See Call.getState().

Parameters
`call`	`Call`: The `Call` invoking this method.
`state`	`int`: The new state of the `Call`. Value is `Call.STATE_NEW`, `Call.STATE_DIALING`, `Call.STATE_RINGING`, `Call.STATE_HOLDING`, `Call.STATE_ACTIVE`, `Call.STATE_DISCONNECTED`, `Call.STATE_SELECT_PHONE_ACCOUNT`, `Call.STATE_CONNECTING`, `Call.STATE_DISCONNECTING`, `Call.STATE_PULLING_CALL`, `Call.STATE_AUDIO_PROCESSING`, or `Call.STATE_SIMULATED_RINGING`

onVideoCallChanged

Added in API level 23

public void onVideoCallChanged (Call call, 
                InCallService.VideoCall videoCall)

Invoked when the Call.VideoCall of the Call has changed.

Parameters
`call`	`Call`: The `Call` invoking this method.
`videoCall`	`InCallService.VideoCall`: The `Call.VideoCall` associated with the `Call`.