Recyclerview refreshes blinks and crashes when deleting items

RecyclerView Refresh blink and delete Item Crash problem

/**
 * todo RecyclerView Refresh blink      Applicable to refresh single or multiple Item
 *  Problem cause analysis ：
 * RecyclerView There is one RecyclerViewPool Used to cache created item, Do not manually create RecyclerViewPool when , The system will automatically create a size of 5
 *  Of RecyclerViewPool.
 *  That means RecyclerView Of item The number is greater than 5, Each refresh will automatically call onCreateViewHolder().
 *  The newly created item If relevant content is not configured , The default values in the layout file... Are displayed . This causes flashing with and without data .
 * <p>
 *  Problem solution ：
 *  Manually create to RecyclerViewPool object , Specify its size , Again to RecyclerView object .
 * <p>
 *  source ：https://blog.csdn.net/u011433287/article/details/80859279
 *
 * @param view
 */
public static void noShank(RecyclerView view) {
    RecyclerView.RecycledViewPool pool = new RecyclerView.RecycledViewPool();
    pool.setMaxRecycledViews(0, 8);
    view.setRecycledViewPool(pool);
}

/**
 * todo RecyclerView Refresh blink      Applicable to refresh single or multiple Item
 *  Problem cause analysis ：
 * RecyclerView Downhill sliding 、 When adding new data , The default animation method will be automatically adjusted every time , It is expressed as a picture 
 *  from  0 -> 1  Set it up again , This will lead to the whole RecyclerView Show me from nothing , This causes a flashing condition 
 * <p>
 *  Problem solution ：
 *  Turn off by setting RecyclerView Animation effect of 
 * <p>
 *  source ：https://blog.csdn.net/d38825/article/details/86593843
 *
 * @param view
 * @param adapter
 */
public static void noShank(RecyclerView view, CommonAdapter adapter) {
    RecyclerView.ItemAnimator animator = view.getItemAnimator();
    if (animator instanceof SimpleItemAnimator) {
        ((SimpleItemAnimator) animator).setSupportsChangeAnimations(false);
    }
    view.getItemAnimator().setChangeDuration(0);
    adapter.setHasStableIds(true);
}

/**
 * todo RecyclerView Refresh blink      Applicable to refresh single Item
 *  Problem cause analysis ：
 *  because notifyDataSetChanged(); The whole is refreshed RecyclerView, And we just need to brush a single Item nothing more 
 * <p>
 *  Problem solution ：
 *  Use notifyItemChanged(int position); Refresh the specified location Item
 *
 * @param adapter
 * @param position
 */
public static void noShank(CommonAdapter adapter, int position) {
    adapter.notifyItemChanged(position);
}

**
     *  Delete the data at the specified index and refresh Item
     */
    public void deleteIndexData(int position) {
        // When users quickly click delete, they may be in Item When only two are left, an index exception is reported , as a result of position=1 Situated Item The delete operation has been performed 
        // But there is no such thing as to delete it , At this time, the data size is 1, So there's an error .
        // The solution is to judge when deleting position The size of is less than the total number of data .
        if (getItemCount() > 0 && position < getItemCount()) {
            this.dataList.remove(position);
//            notifyItemChanged(position);
            notifyItemRemoved(position);
            // todo  After the delete operation, be sure to call... At the end notifyItemRangeChanged(int positionStart, int itemCount)
            //   Method refresh to delete the Item Subsequent data , Otherwise, an index exception will occur 
            notifyItemRangeChanged(position, getItemCount());
        }
    }

About List Collection delete elements , I saw a better way on the Internet , Just use Iterator Iterator to delete .

	        if (getItemCount()>0&&position<getItemCount()){
		        Iterator<T> it = this.dataList.iterator();
		        while (it.hasNext()) {
		            if (it.next() == this.dataList.get(position)) {
		                it.remove();
		                notifyItemRemoved(position);
		                // todo  After the delete operation, be sure to call... At the end notifyItemRangeChanged(int positionStart, int itemCount)
		                //   Method refresh to delete the Item Subsequent data , Otherwise, an index exception will occur 
		                notifyItemRangeChanged(position, getItemCount());
		                return;// End the current method 
		        }
            }
        }

use List.remove() It can lead to List Change in length of , If at this time still carry on to List Errors will be reported during some length related operations , So it's best to use List Determine whether to delete or otherwise , use Iterator.remove() To delete . However, pointer exceptions still occur , So it's better to add another layer of judgment .