Handle on item long click on recycler view

问题

I have an adapter that customizes a recyclerView and I want to open a popup menu on long click event on recyclerView's items. How can I do this?

回答1:

This has already been answered here. Anyway, you can do it like this:

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;
    }
}

Update: if you're using Kotlin do:

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
    }
}

回答2:

First you have to register your Activity to listen longClick events from the recyclerView (so you don't have to use any kind of onLongClickListener...):

registerForContextMenu(recyclerView);

Then you create a menu resource (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>

In the activity where you registered for context menu you override this methods:

@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;
    }

This is very important, you have to modify the code in your RecyclerView adapter like this:

@Override
    public void onBindViewHolder(final DocumentViewHolder viewHolder, int position) {

        ...
        viewHolder.itemView.setLongClickable(true);
        ...
    }

Now you are able to show contextual menu and intercept user selection! But you aren't able to know which item the user clicked, to do this you have to use a custom RecyclerView like this (original code from Renaud Cerrato):

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;
    }

}

In the previous onContextItemSelected() method you can know the recyclerView item id and position using this code:

ContextMenuRecyclerView.RecyclerContextMenuInfo info = (ContextMenuRecyclerView.RecyclerContextMenuInfo) item.getMenuInfo();

Finally you have to modify the getItemId() method in your recyclerView adapter and the layout file to make sure that you use your recyclerView and not the android one!

回答3:

I did in this way:

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;
            }
        });
    }
}

回答4:

I was struggling hard to fetch the position of item on click, this worked for me :

public void onClick(View view) {
    ViewHolder holder =(ViewHolder)view.getTag();
    int position = holder.getLayoutPosition();
    Log.d("testing ","pos" +position);
}

来源：https://stackoverflow.com/questions/30078344/handle-on-item-long-click-on-recycler-view