RecyclerView 中的 OnLongItemClick

Posted 2023-04-19

【中文标题】RecyclerView 中的 OnLongItemClick

【英文标题】：OnLongItemClick in RecyclerView

【发布时间】：2015-03-12 18:18:26

【问题描述】：

我开始在 android 中使用 RecyclerView。在我为我的适配器实现触摸侦听器之前，一切正常。

来自这个话题：

https://***.com/a/26826692/2923403

我可以正确实现子视图的监听器。但是，我想同时实现 OnItemClick 和 OnItemLongClick，然后出现问题。他们总是同时被解雇。首先是 OnItemClick，然后是 OnItemLongClick，这使我的函数无用。

这是我的自定义监听器代码（基于上面的代码，感谢 Fouad）：

public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener 
private OnItemClickListener mListener;

public static interface OnItemClickListener 
    public boolean onItemClick(View view, int position);

    public void onItemLongClick(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 childView = recyclerView.findChildViewUnder(e.getX(), e.getY());

            if (childView != null && mListener != null) 
                mListener.onItemLongClick(childView, recyclerView.getChildPosition(childView));
            
        

    );


@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.getChildPosition(childView));
        return true;
    
    return false;


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

对于实施：

mRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener(getActivity(),   mRecyclerView, new RecyclerItemClickListener.OnItemClickListener() 
@Override
 public boolean onItemClick(View view, int position) 
//This is fired 1st

 @Override
 public void onItemLongClick(View view, int position) 
//This comes later
));

你有什么解决办法吗？

【参考方案1】：

您可以在自定义适配器实现中添加侦听器。它会是这样的：

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> 

    public interface OnItemClickListener 
        public void onItemClicked(int position);
    

    public interface OnItemLongClickListener 
        public boolean onItemLongClicked(int position);
    

    private Fragment mFragment;

    public static class ViewHolder extends RecyclerView.ViewHolder 
        public View v;

        public ViewHolder(View v) 
            super(v);
            this.v = v;
        
    

    public RecyclerViewAdapter(Fragment fragment) 
        mFragment = fragment;
    

    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) 
        holder.v.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View v) 
                mFragment.onItemClicked(position);
            
        );
        holder.v.setOnLongClickListener(new View.OnLongClickListener() 
            @Override
            public boolean onLongClick(View v) 
                mFragment.onItemLongClicked(position);
                return true;
            
        );
    
    . . .

注意开头的接口定义。这样，您将 onClick 和 onLongClick 事件传递给您的片段进行处理。很方便，你知道的

【讨论】：

嗨。在我的情况下，看起来这两个事件仍然同时触发

您是否从回收视图中删除（禁用）onTouch 侦听器？你不需要它们。只需在您的活动或片段中实现RecyclerViewAdapter.OnItemClickListener 和RecyclerViewAdapter.OnItemLongClickListener，并覆盖各自的接口方法