RecyclerView 中的 OnLongItemClick

Question

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：

我可以正确实现子视图的侦听器。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。

这是我的自定义侦听器代码（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？

Answer 1

您可以在自定义适配器实现中添加侦听器。它将类似于：

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。这样您就可以将 onClick 和 onLongClick 事件传递给您的片段进行处理。很方便，你知道

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