```
@RequiresApi(api=29)
public interface StageRenderer
```
An interface to implement that can be used to build user interfaces. Implementing a StageRenderer provides all the necessary information about a Stage to create a complete UI.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onConnectionStateChanged(Stage stage, Stage.ConnectionState state, BroadcastException exception)`	The connection state of the associated `Stage` has changed.
`void`	`onError(BroadcastException exception)`	Triggers whenever an error occurs
`void`	`onParticipantJoined(Stage stage, ParticipantInfo participantInfo)`	A new participant has joined the Stage and started publishing.
`void`	`onParticipantLeft(Stage stage, ParticipantInfo participantInfo)`	A new participant has left the Stage or stopped publishing.
`void`	`onParticipantPublishStateChanged(Stage stage, ParticipantInfo participantInfo, Stage.PublishState publishState)`	The publish state of a participant has changed.
`void`	`onParticipantSubscribeStateChanged(Stage stage, ParticipantInfo participantInfo, Stage.SubscribeState subscribeState)`	The subscribe state of a participant has changed.
`void`	`onStreamsAdded(Stage stage, ParticipantInfo participantInfo, java.util.List<StageStream> streams)`	Triggers whenever a remote audio/video stream is added.
`void`	`onStreamsMutedChanged(Stage stage, ParticipantInfo participantInfo, java.util.List<StageStream> streams)`	Triggers whenever a stream is muted, the stream could either be `LocalStageStream` or `StageStream`
`void`	`onStreamsRemoved(Stage stage, ParticipantInfo participantInfo, java.util.List<StageStream> streams)`	Triggers whenever a remote audio/video stream is removed.

Method Detail

onError

void onError(@NonNull
             BroadcastException exception)

Triggers whenever an error occurs

Parameters:: exception - The error that occured

onConnectionStateChanged

void onConnectionStateChanged(@NonNull
                              Stage stage,
                              @NonNull
                              Stage.ConnectionState state,
                              @Nullable
                              BroadcastException exception)

The connection state of the associated Stage has changed.

Parameters:: stage - The Stage that had the connection state change.; state - The new connection state of the Stage.; exception - An error, if the state change was caused by an error.

onParticipantJoined
```
void onParticipantJoined(@NonNull
                         Stage stage,
                         @NonNull
                         ParticipantInfo participantInfo)
```
A new participant has joined the Stage and started publishing.

Parameters:

stage - The Stage that the participant joined and started publishing.

participantInfo - A description of the participant that joined and started publishing.

onParticipantLeft
```
void onParticipantLeft(@NonNull
                       Stage stage,
                       @NonNull
                       ParticipantInfo participantInfo)
```
A new participant has left the Stage or stopped publishing.

Parameters:

stage - The Stage that the participant left or stopped publishing.

participantInfo - A description of the participant that left or stopped publishing.

onParticipantPublishStateChanged

void onParticipantPublishStateChanged(@NonNull
                                      Stage stage,
                                      @NonNull
                                      ParticipantInfo participantInfo,
                                      @NonNull
                                      Stage.PublishState publishState)

The publish state of a participant has changed.

Parameters:: stage - The Stage associated with the participant that changed their publish state.; participantInfo - The participant that changed their publish state.; publishState - The new publish state.

onParticipantSubscribeStateChanged

void onParticipantSubscribeStateChanged(@NonNull
                                        Stage stage,
                                        @NonNull
                                        ParticipantInfo participantInfo,
                                        @NonNull
                                        Stage.SubscribeState subscribeState)

The subscribe state of a participant has changed.

Parameters:: stage - The Stage associated with the participant that changed their subscribe state.; participantInfo - The participant that changed their subscribe state.; subscribeState - The new subscribe state.

onStreamsAdded

void onStreamsAdded(@NonNull
                    Stage stage,
                    @NonNull
                    ParticipantInfo participantInfo,
                    @NonNull
                    java.util.List<StageStream> streams)

Triggers whenever a remote audio/video stream is added. This is the result of subscription state change

Parameters:: stage - The Stage associated with the added streams; participantInfo - The ParticipantInfo associated with the added streams.; streams - A list of added streams

onStreamsRemoved
```
void onStreamsRemoved(@NonNull
                      Stage stage,
                      @NonNull
                      ParticipantInfo participantInfo,
                      @NonNull
                      java.util.List<StageStream> streams)
```
Triggers whenever a remote audio/video stream is removed. This could be caused by either remote participant is no longer publishing or network issue

Parameters:

stage - The Stage associated with the removed streams

participantInfo - The ParticipantInfo associated with the removed streams.

streams - A list of removed streams

onStreamsMutedChanged

void onStreamsMutedChanged(@NonNull
                           Stage stage,
                           @NonNull
                           ParticipantInfo participantInfo,
                           @NonNull
                           java.util.List<StageStream> streams)

Triggers whenever a stream is muted, the stream could either be LocalStageStream or StageStream

Parameters:: stage - The Stage associated with the updated streams; participantInfo - The ParticipantInfo associated with the updated streams.; streams - A list of streams that have had their mute state changed

Interface StageRenderer