参与者管理

• 用户加入频道的时间。
• 用户离开频道的时间。
• 用户状态发生重要变化的时间，如用户是否在说话或键入。

• VivoxService.Instance.ParticipantAddedToChannel

• VivoxService.Instance.ParticipantRemovedFromChannel

• VivoxParticipant.ParticipantMuteStateChanged

• VivoxParticipant.ParticipantSpeechDetected

• VivoxParticipant.ParticipantAudioEnergyChanged

VivoxParticipant

ParticipantAddedToChannel

ParticipantRemovedFromChannel

• PlayerId
• DisplayName
• VivoxParticipant 所属的频道的 ChannelName
• VivoxParticipant 是否为 IsSelf（表示频道内本地玩家的参与者）

• IsMuted 状态
• AudioEnergy
• SpeechDetected（玩家的 AudioEnergy 是否已增加到 Vivox 认为是语音的程度）

VivoxParticipant.ParticipantMuteStateChanged

VivoxParticipant.ParticipantSpeechDetected

VivoxParticipant.ParticipantAudioEnergyChanged

public class RosterManager : MonoBehaviour{    private const string LobbyChannelName = "lobbyChannel";    private Dictionary<string, List<RosterItem>> rosterObjects = new Dictionary<string, List<RosterItem>>();    public GameObject rosterItemPrefab;    private void Start()    {        VivoxService.Instance.ParticipantAddedToChannel += OnParticipantAdded;        VivoxService.Instance.ParticipantRemovedFromChannel += OnParticipantRemoved;    }    public void ClearAllRosters()    {        foreach(List<RosterItem> rosterList in rosterObjects.Values)        {            foreach(RosterItem item in rosterList)            {                Destroy(item.gameObject);            }            rosterList.Clear();        }        rosterObjects.Clear();    }    public void ClearChannelRoster(string channelName)    {        List<RosterItem> rosterList = rosterObjects[channelName];        foreach(RosterItem item in rosterList)        {            Destroy(item.gameObject);        }        rosterList.Clear();        rosterObjects.Remove(channelName);    }    private void CleanRoster(string channelName)    {        RectTransform rt = this.gameObject.GetComponent<RectTransform>();        rt.sizeDelta = new Vector2(0, rosterObjects[channelName].Count * 50);    }    void UpdateParticipantRoster(VivoxParticipant participant, bool isAddParticipant)    {        if (isAddParticipant)        {            GameObject newRosterObject = GameObject.Instantiate(rosterItemPrefab, this.gameObject.transform);            RosterItem newRosterItem = newRosterObject.GetComponent<RosterItem>();            List<RosterItem> thisChannelList;            if (rosterObjects.ContainsKey(participant.ChannelName))            {                //Add this object to an existing roster                rosterObjects.TryGetValue(participant.ChannelName, out thisChannelList);                newRosterItem.SetupRosterItem(participant);                thisChannelList.Add(newRosterItem);                rosterObjects[participant.ChannelName] = thisChannelList;            }            else            {                //Create a new roster to add this object to                thisChannelList = new List<RosterItem>();                thisChannelList.Add(newRosterItem);                newRosterItem.SetupRosterItem(participant);                rosterObjects.Add(participant.ChannelName, thisChannelList);            }            CleanRoster(participant.ChannelName);        }        else        {            if (rosterObjects.ContainsKey(participant.ChannelName))            {                RosterItem removedItem = rosterObjects[participant.ChannelName].FirstOrDefault(p => p.Participant.PlayerId == participant.PlayerId);                if (removedItem != null)                {                    rosterObjects[participant.ChannelName].Remove(removedItem);                    Destroy(removedItem.gameObject);                    CleanRoster(participant.ChannelName);                }                else                {                    Debug.LogError("Trying to remove a participant that has no roster item.");                }            }        }    }    void OnParticipantAdded(VivoxParticipant participant)    {        UpdateParticipantRoster(participant, true);    }    void OnParticipantRemoved(VivoxParticipant participant)    {        UpdateParticipantRoster(participant, false);    }}public class RosterItem : MonoBehaviour{    // Player specific items.    public VivoxParticipant Participant;    public Text PlayerNameText;    public Image ChatStateImage;    public Sprite MutedImage;    public Sprite SpeakingImage;    public Sprite NotSpeakingImage;    Button m_muteButton;    private void UpdateChatStateImage()    {        if (Participant.IsMuted)        {            ChatStateImage.sprite = MutedImage;        }        else        {            if (Participant.SpeechDetected)            {                ChatStateImage.sprite = SpeakingImage;            }            else            {                ChatStateImage.sprite = NotSpeakingImage;            }        }    }    public void SetupRosterItem(VivoxParticipant participant)    {        //Set the Participant variable of this RosterItem to the VivoxParticipant added in the RosterManager        Participant = participant;        PlayerNameText.text = Participant.DisplayName;        // Update the image to the active state of the user (either the SpeakingImage, the MutedImage, or the NotSpeakingImage) and then attach        // the function to run if an event is fired denoting a change to that users state        UpdateChatStateImage();        Participant.ParticipantMuteStateChanged += UpdateChatStateImage;        Participant.ParticipantSpeechDetected += UpdateChatStateImage;        //A button on the UI element itself is implemented to handle muting on the participant represented by the UI element        m_muteButton = gameObject.GetComponent<Button>();        m_muteButton.onClick.AddListener(() =>        {            // If already muted, unmute, and vice versa.            if (Participant.IsMuted)            {                Participant.UnmutePlayerLocally();            }            else            {                Participant.MutePlayerLocally();            }        });    }    void OnDestroy()    {        Participant.ParticipantMuteStateChanged -= UpdateChatStateImage;        Participant.ParticipantSpeechDetected -= UpdateChatStateImage;        m_muteButton.onClick.RemoveAllListeners();    }}