Get clicked item and its position in RecyclerView
Based on the link: Why doesn't RecyclerView have onItemClickListener()? and How RecyclerView is different from Listview?, and also @Duncan's general idea, I give my solution here:
Define one interface
RecyclerViewClickListener
for a passing message from the adapter toActivity
/Fragment
:public interface RecyclerViewClickListener { public void recyclerViewListClicked(View v, int position); }
In
Activity
/Fragment
implement the interface, and also pass listener to adapter:@Override public void recyclerViewListClicked(View v, int position){... ...} //set up adapter and pass clicked listener this myAdapter = new MyRecyclerViewAdapter(context, this);
In
Adapter
andViewHolder
:public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ItemViewHolder> { ... ... private Context context; private static RecyclerViewClickListener itemListener; public MyRecyclerViewAdapter(Context context, RecyclerViewClickListener itemListener) { this.context = context; this.itemListener = itemListener; ... ... } //ViewHolder class implement OnClickListener, //set clicklistener to itemView and, //send message back to Activity/Fragment public static class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{ ... ... public ItemViewHolder(View convertView) { super(convertView); ... ... convertView.setOnClickListener(this); } @Override public void onClick(View v) { itemListener.recyclerViewListClicked(v, this.getPosition()); } } }
After testing, it works fine.
[UPDATE]
Since API 22, RecyclerView.ViewHolder.getPosition()
is deprecated, so instead with getLayoutPosition()
.
public class MyRvAdapter extends RecyclerView.Adapter<MyRvAdapter.MyViewHolder>{
public Context context;
public ArrayList<RvDataItem> dataItems;
...
constructor
overrides
...
class MyViewHolder extends RecyclerView.ViewHolder{
public TextView textView;
public Context context;
public MyViewHolder(View itemView, Context context) {
super(itemView);
this.context = context;
this.textView = (TextView)itemView.findViewById(R.id.textView);
// on item click
itemView.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
// get position
int pos = getAdapterPosition();
// check if item still exists
if(pos != RecyclerView.NO_POSITION){
RvDataItem clickedDataItem = dataItems.get(pos);
Toast.makeText(v.getContext(), "You clicked " + clickedDataItem.getName(), Toast.LENGTH_SHORT).show();
}
}
});
}
}
}