为RecyclerView添加优雅的点击事件、长按事件

版权声明：本文为博主原创文章，如需转载请声明作者信息，谢谢。 https://blog.csdn.net/itCatface/article/details/77865013

本篇参考：Hugo的文章-Getting your clicks on RecyclerView

效果如下

一、完整的点击、长按事件支持类

1. 先要准备一份resources
   res -> values -> ids.xml ->

   <?xml version="1.0" encoding="utf-8"?>
   <resources>
       <item name="item_click_support" type="id" />
   </resources>

   // 2. 具体的支持类
   public class ItemClickSupport {
       private final RecyclerView mRecyclerView;
       private OnItemClickListener mOnItemClickListener;
       private OnItemLongClickListener mOnItemLongClickListener;
       private View.OnClickListener mOnClickListener = new View.OnClickListener() {
           @Override public void onClick(View v) {
               if (mOnItemClickListener != null) {
                   RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
                   mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
               }
           }
       };
       private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() {
           @Override public boolean onLongClick(View v) {
               if (mOnItemLongClickListener != null) {
                   RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
                   return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v);
               }
               return false;
           }
       };
       private RecyclerView.OnChildAttachStateChangeListener mAttachListener = new RecyclerView.OnChildAttachStateChangeListener() {
           @Override public void onChildViewAttachedToWindow(View view) {
               if (mOnItemClickListener != null) {
                   view.setOnClickListener(mOnClickListener);
               }
               if (mOnItemLongClickListener != null) {
                   view.setOnLongClickListener(mOnLongClickListener);
               }
           }
   
           @Override public void onChildViewDetachedFromWindow(View view) {
   
           }
       };
   
       private ItemClickSupport(RecyclerView recyclerView) {
           mRecyclerView = recyclerView;
           mRecyclerView.setTag(R.id.item_click_support, this);
           mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
       }
   
       public static ItemClickSupport addTo(RecyclerView view) {
           ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
           if (support == null) {
               support = new ItemClickSupport(view);
           }
           return support;
       }
   
       public static ItemClickSupport removeFrom(RecyclerView view) {
           ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
           if (support != null) {
               support.detach(view);
           }
           return support;
       }
   
       public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) {
           mOnItemClickListener = listener;
           return this;
       }
   
       public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) {
           mOnItemLongClickListener = listener;
           return this;
       }
   
       private void detach(RecyclerView view) {
           view.removeOnChildAttachStateChangeListener(mAttachListener);
           view.setTag(R.id.item_click_support, null);
       }
   
       // 点击接口
       public interface OnItemClickListener {
           void onItemClicked(RecyclerView recyclerView, int position, View v);
       }
   
       // 长按接口
       public interface OnItemLongClickListener {
           boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
       }
   }

二、使用方式

可在setAdapter()之后调用

// 点击
ItemClickSupport.addTo(rv).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
    @Override public void onItemClicked(RecyclerView recyclerView, int position, View v) {
        Toast.makeText(MainActivity.this, mDatas.get(position), Toast.LENGTH_SHORT).show();
    }
});

// 长按
ItemClickSupport.addTo(rv).setOnItemLongClickListener(new ItemClickSupport.OnItemLongClickListener() {
    @Override public boolean onItemLongClicked(RecyclerView recyclerView, int position, View v) {

        Toast.makeText(MainActivity.this, "长按" + mDatas.get(position) + "已删除", Toast.LENGTH_SHORT).show();

        // 需要自己处理position在集合中的位置(需考虑头、身、脚布局数量)
        mDatas.remove(position);
        if (lastVisible + 1 == mAdapter.getItemCount()) {
            addmore();
        }
        mAdapter.notifyItemRemoved(position);

        // 消耗事件
        return true;
    }
});