Cannot call this method while Re

问题重现

RecylcerView不停的上拉加载更多 更新数据时（adapter执行notifyDataSetChanged）时出现java.lang.IllegalStateException: Cannot call this method while RecyclerView is computing a layout or scrolling android.support.v7.widget.RecyclerView

字面意思：当Recyclerview计算布局或滚动时，不能调用此方法

解决方法

因此解决方案就是在更新数据时多加一层判断，在没有计算布局 且没有滚动时才能调用此方法进行数据更新。

首先先了解一下RecyclerView.getScrollState() 的枚举值有三个：

    //停止滚动
    public static final int SCROLL_STATE_IDLE = 0;
    
    //正在被外部拖拽,一般为用户正在用手指滚动
    public static final int SCROLL_STATE_DRAGGING = 1;
    
    //自动滚动开始
    public static final int SCROLL_STATE_SETTLING = 2;
    

方法1

private void bindListData(final List<DataBean> data) {
        LogUtil.e("recyclerView.getScrollState() :" + recyclerView.getScrollState() );//0 , 1
        LogUtil.e("recyclerView.isComputingLayout() :" + recyclerView.isComputingLayout());//false

        //没有计算布局 且没有滚动时
        if (recyclerView.getScrollState() == RecyclerView.SCROLL_STATE_IDLE
                && (recyclerView.isComputingLayout() == false)) {
            //totalListBeanList.clear();
            totalListBeanList.addAll(data);
            dataAdapter.setData(totalListBeanList);
            dataAdapter.notifyDataSetChanged();
        }else {
            totalListBeanList.addAll(data);
        }
    }

方法2 （方法1的逆否）

private void bindListData(final List<DataBean> data) {
     
        //计算布局 或 滚动时
        if(recyclerView.getScrollState() != RecyclerView.SCROLL_STATE_IDLE 
           ||  (recyclerView.isComputingLayout() == true)){
            totalListBeanList.addAll(data);
        }else {
            //totalListBeanList.clear();
            totalListBeanList.addAll(data);
            dataAdapter.setData(totalListBeanList);
            dataAdapter.notifyDataSetChanged();
        }
    }

参考：
Cannot call this method while RecyclerView is computing a layout or scrolling android.support.v7.wid