处理项目长按回收站视图
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【中文标题】处理项目长按回收站视图【英文标题】:Handle on item long click on recycler view 【发布时间】:2015-07-16 16:26:02 【问题描述】:我有一个自定义recyclerView
的适配器,我想在recyclerView
的项目上的长按事件上打开一个弹出菜单。
我该怎么做?
【问题讨论】:
How to create context menu for RecyclerView 的可能重复项 【参考方案1】:这已经回答here。无论如何,你可以这样做:
class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, View.OnLongClickListener
private Article article;
private TextView nameTextView;
public ViewHolder(View itemView)
super(itemView);
itemView.setOnClickListener(this);
itemView.setOnLongClickListener(this);
nameTextView = (TextView) itemView.findViewById(R.id.grid_item_article_name_textView);
public void bind(Article article)
this.article = article;
nameTextView.setText(article.getName());
@Override
public void onClick(View view)
// Context context = view.getContext();
// article.getName()
@Override
public boolean onLongClick(View view)
// Handle long click
// Return true to indicate the click was handled
return true;
更新:如果您使用的是 Kotlin,请执行以下操作:
inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView),
View.OnClickListener, View.OnLongClickListener
init
itemView.setOnClickListener(this)
itemView.setOnLongClickListener(this)
private lateinit var article: Article
private val titleTextView: TextView = itemView.findViewById(R.id.item_article_title_textView)
fun bind(article: Article)
this.article = article
titleTextView.text = article.title
override fun onClick(view: View)
listener.onItemClick(article)
override fun onLongClick(view: View): Boolean
Toast.makeText(view.context, "long click", Toast.LENGTH_SHORT).show()
// Return true to indicate the click was handled
return true
【讨论】:
你必须让监听器下到 Viewholder,但它仍然比所有将 TouchListeners 添加到 RecylerView 的直接解决方案要容易得多【参考方案2】:我是这样做的:
static class ViewHolder extends RecyclerView.ViewHolder
TextView tvName;
ViewHolder(View v)
super(v);
tvName = (TextView) v.findViewById(R.id.textView_Username);
//Single Tapup
v.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
Toast.makeText(v.getContext(), "Position is " + getAdapterPosition(), Toast.LENGTH_SHORT).show();
);
//Long Press
v.setOnLongClickListener(new View.OnLongClickListener()
@Override
public boolean onLongClick(View v)
Toast.makeText(v.getContext(), "Position is " + getAdapterPosition(), Toast.LENGTH_SHORT).show();
return false;
);
【讨论】:
这对我来说是最简单的方法! (我正在使用带有 ItemTouchHelper 的 RecyclerView 将项目从视图中滑出,并通过长按来处理值。)谢谢!!!【参考方案3】:首先,您必须注册 Activity 以监听来自 recyclerView
的 longClick 事件(因此您不必使用任何类型的 onLongClickListener
...):
registerForContextMenu(recyclerView);
然后你创建一个菜单资源(context_menu.xml):
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:title="Mostra documento" android:id="@+id/context_menu_documents_fragment_view"></item>
<item android:title="Aggiungi ad un contenitore" android:id="@+id/context_menu_documents_fragment_add_to_box"></item>
<item android:title="Elimina documento" android:id="@+id/context_menu_documents_fragment_delete"></item>
</menu>
在您为上下文菜单注册的活动中,您会覆盖此方法:
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo)
super.onCreateContextMenu(menu, v, menuInfo);
// Inflate Menu from xml resource
MenuInflater menuInflater = getActivity().getMenuInflater();
menuInflater.inflate(R.menu.context_menu_documents_fragment, menu);
@Override
public boolean onContextItemSelected(MenuItem item)
Toast.makeText(getActivity(), " User selected something ", Toast.LENGTH_LONG).show();
return false;
这很重要,你必须像这样修改RecyclerView
适配器中的代码:
@Override
public void onBindViewHolder(final DocumentViewHolder viewHolder, int position)
...
viewHolder.itemView.setLongClickable(true);
...
现在您可以显示上下文菜单并拦截用户选择! 但是您无法知道用户单击了哪个项目,为此您必须使用这样的自定义 RecyclerView(来自 Renaud Cerrato 的原始代码):
public class ContextMenuRecyclerView extends RecyclerView
private RecyclerContextMenuInfo mContextMenuInfo;
public ContextMenuRecyclerView(Context context)
super(context);
public ContextMenuRecyclerView(Context context, AttributeSet attrs)
super(context, attrs);
public ContextMenuRecyclerView(Context context, AttributeSet attrs, int defStyle)
super(context, attrs, defStyle);
@Override
protected ContextMenu.ContextMenuInfo getContextMenuInfo()
return mContextMenuInfo;
@Override
public boolean showContextMenuForChild(View originalView)
final int longPressPosition = getChildAdapterPosition(originalView);
if (longPressPosition >= 0)
final long longPressId = getAdapter().getItemId(longPressPosition);
mContextMenuInfo = new RecyclerContextMenuInfo(longPressPosition, longPressId);
return super.showContextMenuForChild(originalView);
return false;
public static class RecyclerContextMenuInfo implements ContextMenu.ContextMenuInfo
public RecyclerContextMenuInfo(int position, long id)
this.position = position;
this.id = id;
final public int position;
final public long id;
在前面的onContextItemSelected()
方法中,您可以使用以下代码知道recyclerView
项目的id 和位置:
ContextMenuRecyclerView.RecyclerContextMenuInfo info = (ContextMenuRecyclerView.RecyclerContextMenuInfo) item.getMenuInfo();
最后,您必须修改 recyclerView 适配器和布局文件中的 getItemId() 方法,以确保您使用的是您的 recyclerView 而不是 android 的!
【讨论】:
【参考方案4】:我一直在努力获取点击时项目的位置,这对我有用:
public void onClick(View view)
ViewHolder holder =(ViewHolder)view.getTag();
int position = holder.getLayoutPosition();
Log.d("testing ","pos" +position);
【讨论】:
int position = getAdapterPosition() 将返回点击项目的位置。以上是关于处理项目长按回收站视图的主要内容,如果未能解决你的问题,请参考以下文章