RtcEngineEventHandler class

The SDK uses the RtcEngineEventHandler class to send callbacks to the application, and the application inherits the methods of this class to retrieve these callbacks.

All methods in this class have their (empty) default implementations, and the application can inherit only some of the required events instead of all of them.

In the callbacks, the application should avoid time-consuming tasks or call blocking APIs (such as SendMessage), otherwise, the SDK may not work properly.

Constructors

RtcEngineEventHandler({WarningCallback? warning, ErrorCallback? error, ApiCallCallback? apiCallExecuted, UidWithElapsedAndChannelCallback? joinChannelSuccess, RtcStatsCallback? rejoinChannelSuccess, RtcStatsCallback? leaveChannel, UserAccountCallback? localUserRegistered, UserInfoCallback? userInfoUpdated, ClientRoleCallback? clientRoleChanged, UidWithElapsedCallback? userJoined, UserOfflineCallback? userOffline, ConnectionStateCallback? connectionStateChanged, NetworkTypeCallback? networkTypeChanged, EmptyCallback? connectionLost, TokenCallback? tokenPrivilegeWillExpire, EmptyCallback? requestToken, AudioVolumeCallback? audioVolumeIndication, UidCallback? activeSpeaker, ElapsedCallback? firstLocalAudioFrame, VideoFrameCallback? firstLocalVideoFrame, UidWithMutedCallback? userMuteVideo, VideoSizeCallback? videoSizeChanged, RemoteVideoStateCallback? remoteVideoStateChanged, LocalVideoStateCallback? localVideoStateChanged, RemoteAudioStateCallback? remoteAudioStateChanged, LocalAudioStateCallback? localAudioStateChanged, FallbackCallback? localPublishFallbackToAudioOnly, FallbackWithUidCallback? remoteSubscribeFallbackToAudioOnly, AudioRouteCallback? audioRouteChanged, RectCallback? cameraFocusAreaChanged, RectCallback? cameraExposureAreaChanged, FacePositionCallback? facePositionChanged, RtcStatsCallback? rtcStats, NetworkQualityCallback? lastmileQuality, NetworkQualityWithUidCallback? networkQuality, LastmileProbeCallback? lastmileProbeResult, LocalVideoStatsCallback? localVideoStats, LocalAudioStatsCallback? localAudioStats, RemoteVideoStatsCallback? remoteVideoStats, RemoteAudioStatsCallback? remoteAudioStats, EmptyCallback? audioMixingFinished, AudioMixingStateCallback? audioMixingStateChanged, SoundIdCallback? audioEffectFinished, RtmpStreamingStateCallback? rtmpStreamingStateChanged, EmptyCallback? transcodingUpdated, StreamInjectedStatusCallback? streamInjectedStatus, StreamMessageCallback? streamMessage, StreamMessageErrorCallback? streamMessageError, EmptyCallback? mediaEngineLoadSuccess, EmptyCallback? mediaEngineStartCallSuccess, MediaRelayStateCallback? channelMediaRelayStateChanged, MediaRelayEventCallback? channelMediaRelayEvent, VideoFrameWithUidCallback? firstRemoteVideoFrame, UidWithElapsedCallback? firstRemoteAudioFrame, UidWithElapsedCallback? firstRemoteAudioDecoded, UidWithMutedCallback? userMuteAudio, UrlWithErrorCallback? streamPublished, UrlCallback? streamUnpublished, TransportStatsCallback? remoteAudioTransportStats, TransportStatsCallback? remoteVideoTransportStats, UidWithEnabledCallback? userEnableVideo, UidWithEnabledCallback? userEnableLocalVideo, VideoFrameWithUidCallback? firstRemoteVideoDecoded, EnabledCallback? microphoneEnabled, EmptyCallback? connectionInterrupted, EmptyCallback? connectionBanned, AudioQualityCallback? audioQuality, EmptyCallback? cameraReady, EmptyCallback? videoStopped, MetadataCallback? metadataReceived, ElapsedCallback? firstLocalAudioFramePublished, ElapsedCallback? firstLocalVideoFramePublished, StreamPublishStateCallback? audioPublishStateChanged, StreamPublishStateCallback? videoPublishStateChanged, StreamSubscribeStateCallback? audioSubscribeStateChanged, StreamSubscribeStateCallback? videoSubscribeStateChanged, RtmpStreamingEventCallback? rtmpStreamingEvent, MediaRecordStateChangeCallback? mediaRecordStateChangeCallback, MediaRecordUploadSuccessCallback? mediaRecordUploadSuccessCallback})

Constructs a RtcEngineEventHandler

Properties

activeSpeaker ↔ UidCallback?

Reports which user is the loudest speaker.

getter/setter pair

apiCallExecuted ↔ ApiCallCallback?

Occurs when an API method is executed.

getter/setter pair

audioEffectFinished ↔ SoundIdCallback?

Occurs when the audio effect file playback finishes.

getter/setter pair

audioMixingFinished ↔ EmptyCallback?

Occurs when the audio mixing file playback finishes.

getter/setter pair

audioMixingStateChanged ↔ AudioMixingStateCallback?

Occurs when the state of the local user's audio mixing file changes.

getter/setter pair

audioPublishStateChanged ↔ StreamPublishStateCallback?

Occurs when the audio publishing state changes.

getter/setter pair

audioQuality ↔ AudioQualityCallback?

Reports the statistics of the audio stream from each remote user/host.

getter/setter pair

audioRouteChanged ↔ AudioRouteCallback?

Occurs when the local audio playback route changes.

getter/setter pair

audioSubscribeStateChanged ↔ StreamSubscribeStateCallback?

Occurs when the audio subscribing state changes.

getter/setter pair

audioVolumeIndication ↔ AudioVolumeCallback?

Reports which users are speaking and the speakers' volume, and whether the local user is speaking.

getter/setter pair

cameraExposureAreaChanged ↔ RectCallback?

The camera exposure area has changed.

getter/setter pair

cameraFocusAreaChanged ↔ RectCallback?

Occurs when the camera focus area is changed.

getter/setter pair

cameraReady ↔ EmptyCallback?

Occurs when the camera is turned on and ready to capture video.

getter/setter pair

channelMediaRelayEvent ↔ MediaRelayEventCallback?

Reports events during the media stream relay.

getter/setter pair

channelMediaRelayStateChanged ↔ MediaRelayStateCallback?

Occurs when the state of the media stream relay changes.

getter/setter pair

clientRoleChanged ↔ ClientRoleCallback?

Occurs when the user role switches in a live broadcast. For example, from a host to an audience or from an audience to a host.

getter/setter pair

connectionBanned ↔ EmptyCallback?

Occurs when your connection is banned by the Meta Server.

getter/setter pair

connectionInterrupted ↔ EmptyCallback?

Occurs when the connection between the SDK and the server is interrupted.

getter/setter pair

connectionLost ↔ EmptyCallback?

Occurs when the SDK cannot reconnect to Meta's edge server 10 seconds after its connection to the server is interrupted.

getter/setter pair

connectionStateChanged ↔ ConnectionStateCallback?

Occurs when the network connection state changes.

getter/setter pair

error ↔ ErrorCallback?

Reports an error during SDK runtime.

getter/setter pair

facePositionChanged ↔ FacePositionCallback?

Reports the face detection result of the local user.

getter/setter pair

firstLocalAudioFrame ↔ ElapsedCallback?

Occurs when the first local audio frame is sent.

getter/setter pair

firstLocalAudioFramePublished ↔ ElapsedCallback?

Occurs when the first audio frame is published.

getter/setter pair

firstLocalVideoFrame ↔ VideoFrameCallback?

Occurs when the first local video frame is rendered.

getter/setter pair

firstLocalVideoFramePublished ↔ ElapsedCallback?

Occurs when the first video frame is published.

getter/setter pair

firstRemoteAudioDecoded ↔ UidWithElapsedCallback?

Occurs when the engine receives the first audio frame from a specified remote user.

getter/setter pair

firstRemoteAudioFrame ↔ UidWithElapsedCallback?

Occurs when the first remote audio frame is received.

getter/setter pair

firstRemoteVideoDecoded ↔ VideoFrameWithUidCallback?

Occurs when the first remote video frame is received and decoded.

getter/setter pair

firstRemoteVideoFrame ↔ VideoFrameWithUidCallback?

Occurs when the first remote video frame is rendered.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

joinChannelSuccess ↔ UidWithElapsedAndChannelCallback?

Occurs when the local user joins a specified channel.

getter/setter pair

lastmileProbeResult ↔ LastmileProbeCallback?

Reports the last-mile network probe result.

getter/setter pair

lastmileQuality ↔ NetworkQualityCallback?

Reports the last mile network quality of the local user once every two seconds before the user joins the channel. Last mile refers to the connection between the local device and Meta's edge server. After the application calls the RtcEngine.enableLastmileTest method, this callback reports once every two seconds the uplink and downlink last mile network conditions of the local user before the user joins the channel.

getter/setter pair

leaveChannel ↔ RtcStatsCallback?

Occurs when a user leaves the channel.

getter/setter pair

localAudioStateChanged ↔ LocalAudioStateCallback?

Occurs when the local audio stream state changes.

getter/setter pair

localAudioStats ↔ LocalAudioStatsCallback?

Reports the statistics of the local audio stream.

getter/setter pair

localPublishFallbackToAudioOnly ↔ FallbackCallback?

Occurs when the published media stream falls back to an audio-only stream due to poor network conditions or switches back to video stream after the network conditions improve.

getter/setter pair

localUserRegistered ↔ UserAccountCallback?

Occurs when the local user registers a user account.

getter/setter pair

localVideoStateChanged ↔ LocalVideoStateCallback?

Occurs when the local video state changes.

getter/setter pair

localVideoStats ↔ LocalVideoStatsCallback?

Reports the statistics of the local video streams.

getter/setter pair

mediaEngineLoadSuccess ↔ EmptyCallback?

Occurs when the media engine is loaded.

getter/setter pair

mediaEngineStartCallSuccess ↔ EmptyCallback?

Occurs when the media engine starts.

getter/setter pair

mediaRecordStateChangeCallback ↔ MediaRecordStateChangeCallback?

getter/setter pair

mediaRecordUploadSuccessCallback ↔ MediaRecordUploadSuccessCallback?

getter/setter pair

metadataReceived ↔ MetadataCallback?

Occurs when the local user receives the metadata.

getter/setter pair

microphoneEnabled ↔ EnabledCallback?

Occurs when the microphone is enabled/disabled.

getter/setter pair

networkQuality ↔ NetworkQualityWithUidCallback?

Reports the last mile network quality of each user in the channel once every two seconds.

getter/setter pair

networkTypeChanged ↔ NetworkTypeCallback?

Occurs when the network type changes.

getter/setter pair

rejoinChannelSuccess ↔ RtcStatsCallback?

Occurs when a user rejoins the channel after being disconnected due to network problems.

getter/setter pair

remoteAudioStateChanged ↔ RemoteAudioStateCallback?

Occurs when the remote audio state changes.

getter/setter pair

remoteAudioStats ↔ RemoteAudioStatsCallback?

Reports the statistics of the audio stream from each remote user/host.

getter/setter pair

remoteAudioTransportStats ↔ TransportStatsCallback?

Reports the transport-layer statistics of each remote audio stream.

getter/setter pair

remoteSubscribeFallbackToAudioOnly ↔ FallbackWithUidCallback?

Occurs when the remote media stream falls back to audio-only stream due to poor network conditions or switches back to video stream after the network conditions improve.

getter/setter pair

remoteVideoStateChanged ↔ RemoteVideoStateCallback?

Occurs when the remote video state changes.

getter/setter pair

remoteVideoStats ↔ RemoteVideoStatsCallback?

Reports the statistics of the video stream from each remote user/host. The SDK triggers this callback once every two seconds for each remote user/host. If a channel includes multiple remote users, the SDK triggers this callback as many times.

getter/setter pair

remoteVideoTransportStats ↔ TransportStatsCallback?

Reports the transport-layer statistics of each remote video stream.

getter/setter pair

requestToken ↔ EmptyCallback?

Occurs when the token has expired.

getter/setter pair

rtcStats ↔ RtcStatsCallback?

Reports the statistics of the RtcEngine once every two seconds.

getter/setter pair

rtmpStreamingEvent ↔ RtmpStreamingEventCallback?

Reports events during the RTMP streaming.

getter/setter pair

rtmpStreamingStateChanged ↔ RtmpStreamingStateCallback?

Occurs when the state of the RTMP streaming changes.

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

streamInjectedStatus ↔ StreamInjectedStatusCallback?

Reports the status of injecting the online media stream.

getter/setter pair

streamMessage ↔ StreamMessageCallback?

Occurs when the local user receives a remote data stream.

getter/setter pair

streamMessageError ↔ StreamMessageErrorCallback?

Occurs when the local user fails to receive a remote data stream.

getter/setter pair

streamPublished ↔ UrlWithErrorCallback?

Reports the result of calling the RtcEngine.addPublishStreamUrl method.

getter/setter pair

streamUnpublished ↔ UrlCallback?

Reports the result of calling the RtcEngine.removePublishStreamUrl method.

getter/setter pair

tokenPrivilegeWillExpire ↔ TokenCallback?

Occurs when the token expires in 30 seconds.

getter/setter pair

transcodingUpdated ↔ EmptyCallback?

Occurs when the publisher's transcoding settings are updated.

getter/setter pair

userEnableLocalVideo ↔ UidWithEnabledCallback?

Occurs when a remote user enables/disables the local video capture function.

getter/setter pair

userEnableVideo ↔ UidWithEnabledCallback?

Occurs when a remote user enables/disables the video module.

getter/setter pair

userInfoUpdated ↔ UserInfoCallback?

Occurs when the SDK gets the user ID and user account of the remote user.

getter/setter pair

userJoined ↔ UidWithElapsedCallback?

Occurs when a remote user (ChannelProfile.Communication)/host (ChannelProfile.LiveBroadcasting) joins the channel.

getter/setter pair

userMuteAudio ↔ UidWithMutedCallback?

Occurs when a remote user stops/resumes sending the audio stream.

getter/setter pair

userMuteVideo ↔ UidWithMutedCallback?

Occurs when a remote user stops/resumes sending the video stream.

getter/setter pair

userOffline ↔ UserOfflineCallback?

Occurs when a remote user (ChannelProfile.Communication)/host (ChannelProfile.LiveBroadcasting) leaves the channel.

getter/setter pair

videoPublishStateChanged ↔ StreamPublishStateCallback?

Occurs when the video publishing state changes.

getter/setter pair

videoSizeChanged ↔ VideoSizeCallback?

Occurs when the video size or rotation information of a remote user changes.

getter/setter pair

videoStopped ↔ EmptyCallback?

Occurs when the video stops playing.

getter/setter pair

videoSubscribeStateChanged ↔ StreamSubscribeStateCallback?

Occurs when the video subscribing state changes.

getter/setter pair

warning ↔ WarningCallback?

Reports a warning during SDK runtime.

getter/setter pair

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

process(String methodName, List data) → void

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited