微擎版线上教育系统开发中，白板功能是如何实现的

implementation 'com.github.duty-os:white-sdk-android:2.7.6'
另外项目的build.gradle还需要添加：
maven { url "https://jitpack.io" }

protected WhiteSdk mWhiteSdk;//白板sdk
//白板操作时的相关配置
WhiteSdkConfiguration configuration = new WhiteSdkConfiguration(DeviceType.touch, 2, 0.2,true);
configuration.setUserCursor(true);
mWhiteSdk = new WhiteSdk(mIWhiteBoardView.getWhiteBoardView(), mContext, configuration,new UrlInterrupter() {
    @Override
    public String urlInterrupter(String sourceUrl) {
        return sourceUrl;
    }
});
// WhiteboardView实质上是webview，所以考虑到webview内存泄漏的问题，WhiteboardView最好动态生成
private WhiteboardView mWhiteboardView;
mWhiteboardView = new WhiteboardView(mContext);

//加入房间需要uuid，roomtoken
HashMap<String, String> payload = new HashMap<>();
if(userBean!=null){
    String avatar=userBean.getAvatar_thumb();
    payload.put("avatar",avatar);
}
RoomParams roomParams = new RoomParams(mUUid, mRoomToken);
roomParams.setUserPayload(payload);
WhiteSdk.joinRoom(roomParams, roomCallbacks，(Promise<Room>) mPromise);
//设置视角跟随主播模式
mRoom.setViewMode(ViewMode.Follower);

/**
 * 是否可写
 */
public void setWritable(boolean isable,Promise<Boolean> promise){
    if(mRoom==null){
        return;
    }
  if(mRoom.getWritable()==isable&&promise!=null){
        promise.then(true);
        return;
    }
    mRoom.setWritable(isable, promise);
}
调用MemberState的相关api可以进行相关教具操作。

if (mRoot != null) {
    mRoot.removeView(mWhiteboardView);
}
if (mWhiteboardView != null) {
    mWhiteboardView.stopLoading();
    // 退出时调用此方法，移除绑定的服务，否则某些特定系统会报错
    mWhiteboardView.getSettings().setJavaScriptEnabled(false);
    mWhiteboardView.clearHistory();
    mWhiteboardView.clearView();
    mWhiteboardView.removeAllViews();
    mWhiteboardView.destroy();
}
if (mWhiteBoardPresenter != null) {
    mWhiteBoardPresenter.release();
}
mWhiteboardView = null;
mWhiteBoardPresenter = null;