Android 为什么RecyclerView适配器没有'；在手动卷轴上是否立即初始化其项目？

我在对话中使用了2个RecyclerViews。其中一个RecyclerView在其中进一步使用嵌套列表。到目前为止一切正常（没有身高问题）

但是，从另一个RecyclerView中，我拖动了一个图像/视图，并在另一个RecyclerView中希望将其删除

此功能工作正常，但出现以下问题：

当拖动的图像使用DragListener的可用拖动事件进入该区域时，我通常会高亮显示特定的文本区域（请参见下图）：

因此，如果我将图像拖到“Customer Voice 5”文本标题，它将高亮显示

当我将其拖动到第5个项目时，它会向下滚动（如DragListener中使用

smoothScrollBy（）

）编码的内容），第6个项目的标题“Customer Voice 6”文本标题也可见，但不会突出显示。它也不会进一步向下滚动以完全显示，此项上没有代码，就好像RecyclerView尚未在其onBindViewHolder（…）方法中更新/识别此项一样

现在，我将拖动的图像放到别处（无操作），然后再次将图像拖动到“Customer Header 6”，它会高亮显示！（还有滚动）这意味着在我第一次运行时丢弃图像后，RecyclerView已经对其进行了更新

因此，当我拖动时，拖动侦听器的事件操作\u拖动\u位置会持续运行，并且在发生这种情况时，Recycler视图似乎无法控制。那么，如何让DragListener和RecycleServiceAdapter这两个东西一起工作呢？[我知道RV如何使用支架上的物品，并在从脏视图列表看不见时重新使用]

我试着去改变；但是没有帮助。在这上面找不到其他东西。也许LinearLayoutManager可能会有所帮助，但无法将其与我的问题联系起来。下面是我的RV适配器的一些代码块

 @Override
    public void onBindViewHolder(MyHolder holder, int position) {


        Log.d("Log","OnBindViewHolder"+position);

        holder.customerVoiceTitle.setText(hashMap.get(position));  //Setting Header Text - "Customer Voice [position+1]"

        holder.customerVoiceTitle.setId(position + 100);   // Setting id to be able to detect each header while performing drag actions

        holder.customerVoiceTitle.setOnDragListener(new MyDragListener());

        customerVoiceMainHeaderText.setId(50);  //Neglect this for the time being, this is also a part of the issue.

        customerVoiceMainHeaderText.setOnDragListener(new MyDragListener());

        holder.totalWorkLayoutListView.setId(position + 150); //ListView also is utilized to perform drag actions

        holder.totalWorkLayoutListView.setOnDragListener(new MyDragListener());

        UtilityClass.setListViewHeightBasedOnChildren(holder.totalWorkLayoutListView, "", ""); //To avoid height inflation issues

      /*  if(allFlag) {
            customerVoiceWorkListCustomAdapter = new CustomerVoiceWorkListCustomAdapter(context, 5, true);
        }
        else if(!allFlag) {
            customerVoiceWorkListCustomAdapter = new CustomerVoiceWorkListCustomAdapter(context, 5, false);
        }*/

        holder.totalWorkLayoutListView.setAdapter(customerVoiceWorkListCustomAdapter);
    }




class MyDragListener implements View.OnDragListener {
        Drawable normalShape = context.getResources().getDrawable(R.drawable.bg_fragment_header_with_border);
        Drawable targetShape = context.getResources().getDrawable(R.drawable.target_shape);

        @Override
        public boolean onDrag(View v, DragEvent event) {


            // Handles each of the expected events
            switch (event.getAction()) {


                //signal for the start of a drag and drop operation.
                case DragEvent.ACTION_DRAG_STARTED:
                    // do nothing
                    break;

                //the drag point has entered the bounding box of the View
                case DragEvent.ACTION_DRAG_ENTERED:
                    if(v.getId() >= 100 && v.getId() < 150)  //For Header Text only
                    v.setBackground(targetShape);    //change the shape of the view
                    break;

                //the user has moved the drag shadow outside the bounding box of the View
                case DragEvent.ACTION_DRAG_EXITED:
                    if(v.getId() >= 100 && v.getId() < 150)  //For Header Text only
                    v.setBackground(normalShape);    //change the shape of the view back to normal
                    break;

                //drag shadow has been released,the drag point is within the bounding box of the View
                case DragEvent.ACTION_DROP:

                    Log.d("Log", "" + v.getId());
                    // if the view is the bottomlinear, we accept the drag item
                    if (v.getId() >= 100 && v.getId() < 150) {  //For Header Text only. If dragged image is dropped some changes take place inside the list. Not IMP now

                        TextView workListHeaderText = (TextView) v;
                        LinearLayout containerLayout = (LinearLayout) workListHeaderText.getParent();

                        ListView workLayoutList = (ListView) containerLayout.getChildAt(1);

                        customerVoiceWorkListCustomAdapter = new CustomerVoiceWorkListCustomAdapter(context, 5, true);

                        workLayoutList.setAdapter(customerVoiceWorkListCustomAdapter);

                    } else if (v.getId() == 50) {
                        allFlag = true;
                        TextView workListRootHeaderText = (TextView) v;
                        LinearLayout layout = (LinearLayout) workListRootHeaderText.getParent();

                        RecyclerView technicianAllotment = (RecyclerView) layout.getChildAt(1);

                        int childCount = technicianAllotment.getChildCount();


                        for (int listCount = 0; listCount < childCount; listCount++) {
                            LinearLayout linearLayout = (LinearLayout) technicianAllotment.getChildAt(listCount);
                            ListView workLayoutList = (ListView) linearLayout.getChildAt(1);

                            customerVoiceWorkListCustomAdapter = new CustomerVoiceWorkListCustomAdapter(context, 5, true);

                            workLayoutList.setAdapter(customerVoiceWorkListCustomAdapter);



                            UtilityClass.setListViewHeightBasedOnChildren(workLayoutList, "", "");
                        }

                    }
                    break;

                case DragEvent.ACTION_DRAG_LOCATION:  //This is used to scroll when dragged image is dragged to the bottom of screen


                    LinearLayout dropZoneView = (LinearLayout) v.getParent();

                    int topOfDropZone = dropZoneView.getTop();
                    int bottomOfDropZone = dropZoneView.getBottom();

                    int scrollY = recyclerView.getScrollY();
                    int scrollViewHeight = recyclerView.getMeasuredHeight();

                    Log.d("Log", "location: Scroll Y: " + scrollY + " Scroll Y+Height: " + (scrollY + scrollViewHeight));
                    Log.d("Log", " top: " + topOfDropZone + " bottom: " + bottomOfDropZone);

                    if (bottomOfDropZone > (scrollY + scrollViewHeight - 100)) {  //Manual scrolling down when image is dragged to bottom RV item
                        notifyDataSetChanged();
                        recyclerView.smoothScrollBy(0, 300);
                    }
                    if (topOfDropZone < (scrollY + 50))  //Manual scrolling up
                        recyclerView.smoothScrollBy(0, -50);

                    break;

                //the drag and drop operation has concluded.
                case DragEvent.ACTION_DRAG_ENDED:
                    if(v.getId() >= 100 && v.getId() < 150)
                    v.setBackground(normalShape);    //go back to normal shape

                default:
                    break;
            }
            return true;
        }
    }

@覆盖
公共无效onBindViewHolder（MyHolder，int位置）{
Log.d（“Log”，“OnBindViewHolder”+位置）；
holder.customerVoiceTitle.setText（hashMap.get（position））；//设置标题文本-“客户语音[position+1]”
holder.customerVoiceTitle.setId（位置+100）；//设置id以便在执行拖动操作时能够检测每个标题
holder.customerVoiceTitle.setOnDragListener（新的MyDragListener（））；
customerVoiceMainHeaderText.setId（50）；//暂时忽略这一点，这也是问题的一部分。
customerVoiceMainHeaderText.setOnDragListener（新的MyDragListener（））；
holder.totalWorkLayoutListView.setId（位置+150）；//ListView还用于执行拖动操作
holder.TotalWorklayOutList.setOnDragListener（新的MyDragListener（））；
UtilityClass.setListViewHeightBasedOnChildren（holder.TotalWorkLayOutList视图，“，”；//避免高度膨胀问题
/*如果（所有标志）{
customerVoiceWorkListCustomAdapter=新的customerVoiceWorkListCustomAdapter（上下文，5，true）；
}
如果（！allFlag），则为else{
customerVoiceWorkListCustomAdapter=新customerVoiceWorkListCustomAdapter（上下文，5，false）；
}*/
holder.totalWorkLayoutListView.setAdapter（customerVoiceWorkListCustomAdapter）；
}
类MyDragListener实现View.OnDragListener{
Drawable normalShape=context.getResources（）.getDrawable（R.Drawable.bg_fragment_header_和_border）；
Drawable targetShape=context.getResources（）.getDrawable（R.Drawable.target_shape）；
@凌驾
公共布尔onDrag（视图v，DrageEvent事件）{
//处理每个预期事件
开关（event.getAction（））{
//开始拖放操作的信号。
案例DrageEvent.ACTION\u DRAG\u已启动：
//无所事事
打破
//拖动点已进入视图的边界框
案例DrageEvent.ACTION\u DRAG\u输入：
如果（v.getId（）>=100&&v.getId（）<150）//仅用于标题文本
v、 setBackground（targetShape）；//更改视图的形状
打破
//用户已将拖曳阴影移动到视图的边界框外
案例DrageEvent.ACTION\u DRAG\u退出：
如果（v.getId（）>=100&&v.getId（）<150）//仅用于标题文本
v、 setBackground（normalShape）；//将视图的形状更改回法线
打破
//已释放拖曳阴影，拖曳点位于视图的边界框内
案例DrageEvent.ACTION_DROP：
Log.d（“Log”，“v.getId（））；
//如果视图是底部线性视图，则接受拖动项
如果（v.getId（）>=100&&v.getId（）<150）{//仅用于标题文本。如果拖放图像，则列表中会发生一些更改。现在不导入
TextView workListHeaderText=（TextView）v；
LinearLayout containerLayout=（LinearLayout）workListHeaderText.getParent（）；
ListView workLayoutList=（ListView）containerLayout.getChildAt（1）；
customerVoiceWorkListCustomAdapter=新的customerVoiceWorkListCustomAdapter（上下文，5，true）；
workLayoutList.setAdapter（customerVoiceWorkListCustomAdapter）；
}else if（v.getId（）==50）{
allFlag=true；
TextView workListRootHeaderText=（TextView）v；
LinearLayout布局=（LinearLayout）workListRootHeaderText.getParent（）；
RecyclerView Technician分配=（RecyclerView）布局。getChildAt（1）；
int childCount=technicianAllocation.getChildCount（）；
对于（int-listCount=0；listCount