Android-长按RecyclerView项目和ContextMenu [英] Android - Long Click on RecyclerView item and ContextMenu

问题描述

问题:在回收站视图中长时间单击某个项目时，无法显示上下文菜单，其中显示删除"选项"

Problem: Cannot display a context menu showing a "delete" option" when longclicking on an item within a recyclerview

预期结果:请参见下图

我快到了，但是我缺少一些东西可以使contextMenu显示在longClick上.

I'm almost there, but I'm missing something to make the contextMenu displayed on a longClick.

这是我放入viewHolder中的内容.我不知道应在onLongClick事件中添加什么内容以及在哪里显示上下文菜单.

Here is what I put in the viewHolder. I don't know what I should add and where to display the context menu in the onLongClick event.

我跳过了一些代码行，并保留了与我的问题相关的代码.

I skipped some lines of code and kept the ones relevant to my question.

非常感谢您的帮助，

我的界面可以处理两种类型的点击

public interface OnItemClickListener{
    void onItemClick(int position);
}

public interface OnItemLongClickListener{
    void onItemLongClick(int position);
}

观看者代码

public void bindLongClick(final int position, final OnItemLongClickListener onItemLongClickListener) {
        itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                onItemLongClickListener.onItemLongClick(position);
                return true;
            }
        });
    }

    @Override
    public void onCreateContextMenu(ContextMenu contextMenu, View view, ContextMenu.ContextMenuInfo contextMenuInfo){
            //menuInfo is null
        Log.v(LOG_TAG, "grrr");
        contextMenu.setHeaderTitle("Select The Action");
        contextMenu.add(0, view.getId(), 0, "Supprimer");//groupId, itemId, order, title
    }

适配器代码

@Override
    public void onBindViewHolder(CityListViewholder holder, int position) {
        holder.cityName.setText(cityArrayList.get(position).getCityName());
        holder.bindClick(position, onItemClickListener);
        holder.bindLongClick(position, onItemLongClickListener);
    }

然后，在活动中-我跳过了与我的问题无关的内容

mCityListAdapter = new CityListAdapter(mContext, cityArrayList, new CityListAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                mPager.setCurrentItem(position);
                mDrawerLayout.closeDrawers();
            }
        }, new CityListAdapter.OnItemLongClickListener() {
            @Override
            public void onItemLongClick(int position) {
                Log.v(LOG_TAG, "Position "+position);
            }
        });

        registerForContextMenu(mRecyclerView);

推荐答案

您需要的是显示内部带有列表的Dialog.像这样:

What you need there is to show Dialog with list inside. Like that:

    itemView.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            final CharSequence[] items = {"Supprimer", "etc", "etc1"};

            AlertDialog.Builder builder = new AlertDialog.Builder(mContext);

            builder.setTitle("Select The Action");
            builder.setItems(items, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int item) {
                }
            });
            builder.show();
            return true;
        }
    });

这篇关于Android-长按RecyclerView项目和ContextMenu的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！