TRTCCloud

  JSONObject jsonObj = new JSONObject();
  jsonObj.put("roomId", 102);
  jsonObj.put("userId", "userB");
  trtc.ConnectOtherRoom(jsonObj.toString());

  JSONObject jsonObj = new JSONObject();
  jsonObj.put("strRoomId", "102");
  jsonObj.put("userId", "userB");
  trtc.ConnectOtherRoom(jsonObj.toString());

    //In the small room that needs interaction, enter the room as an anchor and push audio and video streams
    TRTCCloud mainCloud = TRTCCloud.sharedInstance(mContext);
    TRTCCloudDef.TRTCParams mainParams = new TRTCCloudDef.TRTCParams();
    //Fill your params
    mainParams.role = TRTCCloudDef.TRTCRoleAnchor;
    mainCloud.enterRoom(mainParams, TRTCCloudDef.TRTC_APP_SCENE_LIVE);
    //...
    mainCloud.startLocalPreview(true, videoView);
    mainCloud.startLocalAudio(TRTCCloudDef.TRTC_AUDIO_QUALITY_DEFAULT);

    //In the large room that only needs to watch, enter the room as an audience and pull audio and video streams
    TRTCCloud subCloud = mainCloud.createSubCloud();
    TRTCCloudDef.TRTCParams subParams = new TRTCCloudDef.TRTCParams();
    //Fill your params
    subParams.role = TRTCCloudDef.TRTCRoleAudience;
    subCloud.enterRoom(subParams, TRTCCloudDef.TRTC_APP_SCENE_LIVE);
    //...
    subCloud.startRemoteView(userId, TRTCCloudDef.TRTC_VIDEO_STREAM_TYPE_BIG, view);
    //...
    //Exit from new room and release it.
    subCloud.exitRoom();
    mainCloud.destroySubCloud(subCloud);

{
  "roomId":102,
  "userId":"userC",
  "muteAudio":false,
  "muteVideo":true,
  "muteSubStream":false
}

{
  "strRoomId":"102",
  "userId":"userC",
  "muteAudio":false,
  "muteVideo":true,
  "muteSubStream":false
}