有人使用RecyclerView找到了一种方法来设置一个onClickListener的项目在RecyclerView? 我想设置一个监听器为每个项目的布局,但这似乎有点太麻烦了 我确信有一种方法让RecyclerView监听onClick事件,但我不能完全弄清楚。


当前回答

以下是我所做的。这个解决方案同时支持onClick和onLongClick在两个RecyclerView项目和视图内的RecyclerView项目(内部视图)。

我在我选择的视图上标记viewHolder:

public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_item, null);
    ViewHolder viewHolder = new ViewHolder(itemView);

    itemView.setOnClickListener( this);
    itemView.setOnLongClickListener(this);
    viewHolder.imageIV.setOnClickListener(this);
    viewHolder.imageIV.setOnLongClickListener(this);

    viewHolder.imageIV.setTag(viewHolder);
    itemView.setTag(viewHolder);

    return viewHolder;
}

我使用holder.getPosition()在onClick()方法中检索位置(onLongClick类似):

public void onClick(View view) {
    ViewHolder holder = (ViewHolder) view.getTag();
    int position = holder.getPosition();

    if (view.getId() == holder.imageIV.getId()){
        Toast.makeText(context, "imageIV onClick at" + position, Toast.LENGTH_SHORT).show();
    } else {
        Toast.makeText(context, "RecyclerView Item onClick at " + position, Toast.LENGTH_SHORT).show();
    }
}

带有getChildPosition的变体也可以工作。请注意,对于内部视图,在onClick()中使用:

int position = recyclerView.getChildPosition((View)view.getParent());

在我看来,这个解决方案的优点是,当一个人点击图像,只有onclick()图像侦听器被调用,而当我结合Jacob的解决方案为一个RecyclerView项目视图和我的解决方案为内部视图的RecyclerView项目视图onclick()也被调用(当点击图像)。

其他回答

根据Yigit Boyar的说法,在RecyclerView上注册点击的最好方法是在ViewHolder的创建中定义点击,而不是仅仅为onBindViewHolder绑定的每个项目创建一个新的onClickListener

例子:

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BaseViewHolder<*> {
   val itemBinding = LayoutInflater.from(context).inflate(R.layout.my_layout, parent, false)

   val vh = MainViewHolder (itemBinding)
   vh.itemView.setOnClickListener {
       val pos = vh.adapterPosition
       if(pos != NO_POSITION){
           itemClickLister.onCocktailClick(myList[pos],pos)
       }
   }

   return vh
}

这里有一个更好的和不那么紧密耦合的方式来实现一个OnClickListener的RecyclerView。

用法片段:

RecyclerView recyclerView = findViewById(R.id.recycler);
recyclerView.addOnItemTouchListener(
    new RecyclerItemClickListener(context, recyclerView ,new RecyclerItemClickListener.OnItemClickListener() {
      @Override public void onItemClick(View view, int position) {
        // do whatever
      }

      @Override public void onLongItemClick(View view, int position) {
        // do whatever
      }
    })
);

RecyclerItemClickListener实现:

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;


public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
  private OnItemClickListener mListener;

  public interface OnItemClickListener {
    public void onItemClick(View view, int position);

    public void onLongItemClick(View view, int position);
  }

  GestureDetector mGestureDetector;

  public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
    mListener = listener;
    mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
        @Override
        public boolean onSingleTapUp(MotionEvent e) {
            return true;
        }

        @Override
        public void onLongPress(MotionEvent e) {
            View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
            if (child != null && mListener != null) {
                mListener.onLongItemClick(child, recyclerView.getChildAdapterPosition(child));
            }
        }
    });
}

  @Override public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
    View childView = view.findChildViewUnder(e.getX(), e.getY());
    if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
      mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
      return true;
    }
    return false;
  }

  @Override public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) { }

  @Override
  public void onRequestDisallowInterceptTouchEvent (boolean disallowIntercept){}
}

你可以实现View。OnClickListener到你的ViewHolder类

public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        
    public Item item
    @InjectView(R.id.tv_title) 
    public TextView tvTitle;
    @InjectView(R.id.rl_row) 
    public RelativeLayout rlRow;

    public ViewHolder(View v) {
        super(v);
        ButterKnife.inject(this, v);
        v.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        Log.e("item title",item.getTitle());
    }
}

和onBindViewHolder设置你的视图持有人的项目:

public void onBindViewHolder(ViewHolder holder, int position) {
    holder.tvTitle.setText(objects.get(position).getTitle());
    holder.item = objects.get(position);
}

我有一个很好的解决方案RecyclerView的onItemClickListener的项目和子项

步骤1—创建接口

public interface OnRecyclerViewItemClickListener
{
    /**
     * Called when any item with in recyclerview or any item with in item
     * clicked
     * 
     * @param position
     *            The position of the item
     * @param id
     *            The id of the view which is clicked with in the item or
     *            -1 if the item itself clicked
     */
    public void onRecyclerViewItemClicked(int position, int id);
}

步骤2-然后在适配器的onBindViewHolder方法中使用它,如下所示

/**
     * Custom created method for Setting the item click listener for the items and items with in items
     * @param listener OnRecyclerViewItemClickListener 
     */
    public void setOnItemClickListener(OnRecyclerViewItemClickListener listener)
    {
        this.listener = listener;
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, final int position)
    {
    
        // viewHolder.albumBg.setBackgroundResource(_itemData[position]
        // .getImageUrl());
    
        viewHolder.albumName.setText(arrayList.get(position).getName());
        viewHolder.artistName.setText(arrayList.get(position).getArtistName());
        String imgUrl = arrayList.get(position).getThumbImageUrl();
    
        makeImageRequest(imgUrl, viewHolder);
        viewHolder.parentView.setOnClickListener(new View.OnClickListener()
        {
    
            @Override
            public void onClick(View v)
            {
                listener.onRecyclerViewItemClicked(position, -1);
            }
        });
        viewHolder.settingButton.setOnClickListener(new View.OnClickListener()
        {
    
            @Override
            public void onClick(View v)
            {
                listener.onRecyclerViewItemClicked(position, v.getId());
            }
        });
    
    }
    
    // class to hold a reference to each item of RecyclerView
    public static class ViewHolder extends RecyclerView.ViewHolder
    {
    
        public TextView albumName, artistName;
        public ImageView albumIcon, settingButton;
        public LinearLayout parentView;
    
        public ViewHolder(View itemLayoutView)
        {
            super(itemLayoutView);
            // albumBg = (LinearLayout) itemLayoutView
            // .findViewById(R.id.albumDlbg);
            albumName = (TextView) itemLayoutView.findViewById(R.id.albumName);
            artistName = (TextView) itemLayoutView
                    .findViewById(R.id.artistName);
            albumIcon = (ImageView) itemLayoutView.findViewById(R.id.albumIcon);
            parentView = (LinearLayout) itemLayoutView
                    .findViewById(R.id.albumDlbg);
            settingButton = (ImageView) itemLayoutView
                    .findViewById(R.id.settingBtn);
        }
    
    }

步骤3-在活动或片段中找到并设置回收器视图,您正在使用此

recyclerView = (RecyclerView) rootview.findViewById(R.id.vmtopsongs);

        lm = new LinearLayoutManager(mActivity);
        lm.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(lm);
        recyclerView.addItemDecoration(
                new HorizontalDividerItemDecoration.Builder(getActivity())
                        .paint(Utils.getPaint()).build());
        PopularSongsadapter mAdapter = new PopularSongsadapter(gallery,
                mActivity, true);
        // set adapter
        recyclerView.setAdapter(mAdapter);
        mAdapter.setOnItemClickListener(this);
        // set item animator to DefaultAnimator
        recyclerView.setItemAnimator(new DefaultItemAnimator());

步骤4-最后在使用recyclerview的activity或fragment中实现接口

@Override
    public void onRecyclerViewItemClicked(int position, int id)
    {
        if(id==-1){
            Toast.makeText(mActivity, "complete item clicked", Toast.LENGTH_LONG).show();
        }else{
            Toast.makeText(mActivity, "setting button clicked", Toast.LENGTH_LONG).show();
        }
    }

更新Kotlin语言 我已经更新了kotlin的代码,其中只有整个视图有点击监听器。你可以根据上面的java代码编辑界面和代码来设置子项点击监听器。

适配器

class RecentPostsAdapter(private val list: MutableList<Post>) :
    RecyclerView.Adapter<RecentPostsAdapter.ViewHolder>() {
    private lateinit var onItemClickListener: OnItemClickListener

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        return ViewHolder(
            LayoutInflater.from(parent.context)
                .inflate(R.layout.listitem_recent_post, parent, false)
        )
    }

    override fun getItemCount(): Int {
        return list.size
    }

    fun setOnItemClickListener(onItemClickListener: OnItemClickListener) {
        this.onItemClickListener = onItemClickListener
    }

    private fun getItem(position: Int): Post {
        return list[position]
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.bind(getItem(position))
        holder.itemView.setOnClickListener(View.OnClickListener {
            onItemClickListener.onItemClick(
                position
            )
        })
    }

    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        private var imageView: NetworkImageView? = null
        private var tvTitle: TextView? = null
        private var tvExcerpt: TextView? = null
        private var htmlSpanner: HtmlSpanner = HtmlSpanner()

        init {
            imageView = itemView.findViewById(R.id.niv_post_image)
            tvTitle = itemView.findViewById(R.id.tv_post_title)
            tvExcerpt = itemView.findViewById(R.id.tv_post_excerpt)
        }

        fun bind(post: Post) {
            tvTitle?.text = post.title
            tvExcerpt?.text = htmlSpanner.fromHtml(post.excerpt)
        }
    }

    interface OnItemClickListener {
        fun onItemClick(position: Int)
    }
}

活动或片段

recyclerView = view.findViewById(R.id.rvHomeRecentPosts)
        recyclerView.layoutManager = LinearLayoutManager(view.context)
        list = mutableListOf()
        recentPostsAdapter = RecentPostsAdapter(list)
        recyclerView.adapter = recentPostsAdapter
        recentPostsAdapter.setOnItemClickListener(object:RecentPostsAdapter.OnItemClickListener{
            override fun onItemClick(position: Int) {
                (activity as MainActivity).findNavController(R.id.nav_host_fragment).navigate(R.id.action_nav_home_to_nav_post_detail)
            }

        })

对于kotlin句柄,根据Jacobs的回答单击RecyclerView答案

创建类RecyclerItemClickListener:

class RecyclerItemClickListener(context: Context, recyclerView: RecyclerView, listner: OnItemClickListener) : RecyclerView.OnItemTouchListener {

    var mGestureDetector: GestureDetector
    var mListner: OnItemClickListener
    
    interface OnItemClickListener {
        fun onItemClick(view: View, position: Int)
        fun onLongItemClick(view: View, position: Int)
    }

    init {
        this.mListner = listner
        mGestureDetector = GestureDetector(context, object : GestureDetector.SimpleOnGestureListener() {
            override fun onSingleTapUp(e: MotionEvent?): Boolean = true
            
            override fun onLongPress(e: MotionEvent?) {
                val child: View? = recyclerView.findChildViewUnder(e!!.getX(), e.getY())
                if (child != null && mListner != null) {
                    mListner.onLongItemClick(child, recyclerView.getChildAdapterPosition(child))
                }
            }
        })
    }

    override fun onTouchEvent(rv: RecyclerView, e: MotionEvent) = Unit

    override fun onInterceptTouchEvent(view: RecyclerView, e: MotionEvent): Boolean {
        val childView: View? = view.findChildViewUnder(e!!.getX(), e.getY())
        if (childView != null && mListner != null && mGestureDetector.onTouchEvent(e)) {
            mListner.onItemClick(childView, view.getChildAdapterPosition(childView))
            return true
        }
        return false
    }

    override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) = Unit

}

点击Any RecyclerView(在活动/片段内):

recyclerView.addOnItemTouchListener(
    RecyclerItemClickListener(this, recyclerView, object : RecyclerItemClickListener.OnItemClickListener {
        override fun onItemClick(view: View, position: Int) {
            // TODO catch click
        }

        override fun onLongItemClick(view: View, position: Int) {
            // TODO catch click
        }
    })
)