您可以通过 NERoom 的互动白板，实现互动涂鸦、实时同步、文档共享等功能，满足在线教育、互动娱乐、金融面签、视频会议等低延时高互动场景的需求。

功能介绍

互动白板的应用场景包括：

• 在线教育：用于线上语言培训、K12 学科辅导等课堂教学场景，教师可借助涂鸦、文本、直线、激光笔等基础教具，边演示课件边勾画要点。
• 视频会议：用于视频会议、在线培训等企业协同场景，满足主讲实时演示讲解、多方协同交流的需求。
• 互动娱乐：用于你画我猜、互动涂鸦等娱乐场景，满足更多有趣的游戏互动玩法。
• 金融面签：用于视频面签、远程见证等金融场景，满足面签双方远程办理业务、进行签名确认的需求。

前提条件

创建房间时，已在NECreateRoomOptions方法中，设置enableWhiteboard=true，具体操作方法请参见创建房间。

配置步骤

1. 开始共享白板。

   fun startWhiteboardShare(callback: NECallback<Unit>)
   

2. 设置白板视图。

   fun setupWhiteboardCanvas(view: NEWhiteboardView)
   

3. 设置白板是否可绘制。

   fun setEnableDraw(enable: true/false, callback: NECallback<Unit>)
   

   enable的参数说明如下：

   • true：允许绘制。
   • false：不允许绘制。

4. 停止共享白板。

   fun stopWhiteboardShare(callback: NECallback<Unit>)
   

5. 重置白板视图。

   fun resetWhiteboardCanvas(view: NEWhiteboardView?)
   

6. 关闭某成员的白板共享。

   stopMemberWhiteboardShare(userUuid: String, callback: NECallback<Unit>)
   

示例代码

1.实现共享白板功能的示例代码如下：

                NERoomService roomService = NERoomKit.getInstance().getService(NERoomService.class);
                NERoomContext roomContext = roomService.getRoomContext(roomUuid);
                if (roomContext!=null){
                    roomContext.getWhiteboardController().startWhiteboardShare(new NECallback2<Unit>() {
                        @Override
                        public void onSuccess(@Nullable Unit unit) {
                            super.onSuccess(unit);
                            Log.d(TAG,"success");
                        }

                        @Override
                        public void onError(int code, @Nullable String message) {
                            super.onError(code, message);
                            Log.d(TAG,"error");
                        }
                    });
                }     

2.实现设置白板视图功能的示例代码如下：

        NERoomService roomService = NERoomKit.getInstance().getService(NERoomService.class);
        NERoomContext roomContext = roomService.getRoomContext(roomUuid);
        if (roomContext!=null){
            NEWhiteboardView whiteboardView = new NEWhiteboardView(this);
            whiteboardContainer.removeAllViews();
            whiteboardContainer.addView(whiteboardView);
            whiteboardController.setupWhiteboardCanvas(whiteboardView);
            roomContext.getWhiteboardController().setupWhiteboardCanvas(whiteboardView);
        }       

3.实现重置白板视图功能的示例代码如下：

        NERoomService roomService = NERoomKit.getInstance().getService(NERoomService.class);
        NERoomContext roomContext = roomService.getRoomContext(roomUuid);
        if (roomContext!=null){
            if (whiteboardContainer.getChildCount() > 0) {
                NEWhiteboardView whiteboardView = (NEWhiteboardView) whiteboardContainer.getChildAt(0);
                whiteboardController.resetWhiteboardCanvas(whiteboardView);
            }
        }        

4.实现设置白板是否可绘制功能的示例代码如下：

        NERoomService roomService = NERoomKit.getInstance().getService(NERoomService.class);
        NERoomContext roomContext = roomService.getRoomContext(roomUuid);
        if (roomContext != null) {
             roomContext.getWhiteboardController().setEnableDraw(true, new NECallback2<Unit>() {
                 @Override
                 public void onSuccess(@Nullable Unit unit) {
                     super.onSuccess(unit);
                     Log.d(TAG,"success");
                 }

                 @Override
                 public void onError(int code, @Nullable String message) {
                     super.onError(code, message);
                     Log.d(TAG,"error");
                 }
             });
        }

5.实现停止共享白板功能的示例代码如下：

NERoomService roomService = NERoomKit.getInstance().getService(NERoomService.class);
                NERoomContext roomContext = roomService.getRoomContext(roomUuid);
                if (roomContext!=null){
                    roomContext.getWhiteboardController().stopWhiteboardShare(new NECallback2<Unit>() {
                        @Override
                        public void onSuccess(@Nullable Unit unit) {
                            super.onSuccess(unit);
                            Log.d(TAG,"success");
                        }

                        @Override
                        public void onError(int code, @Nullable String message) {
                            super.onError(code, message);
                            Log.d(TAG,"error");
                        }
                    });
                }      

6.实现监听白板状态变更功能的示例代码如下：

        NERoomService roomService = NERoomKit.getInstance().getService(NERoomService.class);
        NERoomContext roomContext = roomService.getRoomContext(roomUuid);
        if (roomContext!=null){
            roomContext.addRoomListener(new NERoomListener() {
                @Override
                public void onMemberWhiteboardStateChanged(@NonNull NERoomMember member, boolean isSharing) {
                      if (isSharing){
                          Log.d(TAG,member.getUuid()+"is sharing whiteboard")
                      }else{
                          Log.d(TAG,member.getUuid()+"stop sharing whiteboard")
                      } 
                }

            });
        }

7. 实现关闭某成员的白板共享的示例代码如下：

        NERoomService roomService = NERoomKit.getInstance().getService(NERoomService.class);
        NERoomContext roomContext = roomService.getRoomContext(roomUuid);
        if (roomContext != null) {
            String userUuid = "uuid";
            roomContext.getWhiteboardController().stopMemberWhiteboardShare(userUuid, new NECallback2<Unit>() {
                @Override
                public void onSuccess(@Nullable Unit unit) {
                    Log.d(TAG,"success");
                }

                @Override
                public void onError(int code, @Nullable String message) {
                    Log.d(TAG,"error");
                }
            });
        }

相关API文档

方法	功能描述
setEnableDraw	设置白板可绘制。
setupWhiteboardCanvas	设置白板视图。
resetWhiteboardCanvas	重置白板视图。
startWhiteboardShare	开始共享白板。
stopWhiteboardShare	停止共享白板。
onMemberWhiteboardStateChanged	白板共享状态变更回调。
stopMemberWhiteboardShare	关闭某成员的白板共享。