Android-RecyclerView系列 获取可见与不可见的View（亲测有效）

Posted 2021-09-23 彭老希

一、获取可见视图的View （存在屏幕范围内的View）

  // recyclerView -  RecyclerView 控件变量名
  RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
  // 方式一  position : 你需要获取的对应View的索引值即 index 
  View itemView1 = manager.getChildAt(position);
  // 方式二  position : 你需要获取的对应View的索引值即 index 
  View itemView2 = manager.findViewByPosition(position);

二、获取不可见视图的View

    /**
     * 获取RecyclerView的对于View
     * @param recyclerView
     * @param position
     * @return
     */
    public View getRecyclerViewItem(RecyclerView recyclerView,int position){
        if (recyclerView == null || recyclerView.getLayoutManager() == null || recyclerView.getAdapter() == null){
            return null;
        }
        if (position > recyclerView.getAdapter().getItemCount()){
            return null;
        }
        RecyclerView.ViewHolder viewHolder = recyclerView.getAdapter().createViewHolder(recyclerView,recyclerView.getAdapter().getItemViewType(position));
        recyclerView.getAdapter().onBindViewHolder(viewHolder,position);
        viewHolder.itemView.measure(View.MeasureSpec.makeMeasureSpec(recyclerView.getWidth(),View.MeasureSpec.EXACTLY),View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED));
        return viewHolder.itemView;
    }

备注：实际上就是借助 createViewHolder 和 onBindViewHolder 来创建出你需要获取的视图容器以及赋值后的item的实际视图对象View