Why does OnClickListener on a ViewHolder don't work?
Solution 1
Looking at the updated code: you are not setting the onClickListener to any of the views in the ViewHolder. It is an understandable mistake to forget the click listener.
Just use:
tvName.setOnClickListener(this);
star.setOnClickListener(this);
You can set to both or just one of them. You can also simply get the parent layout of these two views, so that the whole item itself in the adapter can be clickable.
itemView.setOnClickListener(this);
Solution 2
You can do it in your onBindViewHolder
@Override
public void onBindViewHolder(ReportViewHolder holder, int position {
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// handle your click here.
} });
}
Gian Segato
Updated on May 25, 2020Comments
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Gian Segato about 4 years
I'm trying to implement a way to handle item selection on a
RecyclerView
. I personally don't like the way suggested in some answers on SO of passing through gestures, and I thought that implementing anOnClickListener
, as suggested here and here, was waaay cleaner.The fact is that... this pattern doesn't actually work! I'm really not able to understand why my
OnClickListener.onClick
is never called. It's kinda like another method intercepts the click beforeonClick
can take care of it.This is my code:
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener { TextView tvName; ImageView star; public ViewHolder(View itemView) { super(itemView); tvName = (TextView) itemView.findViewById(R.id.CHAT_ITEM_name); star = (ImageView) itemView.findViewById(R.id.CHAT_ITEM_star); Fonts.setTypeface(tvName, regular); } @Override public void onClick(View view) { int position = getLayoutPosition(); select(position); } }
Unfortunately it's very important for me to able to access the position of the clicked item in the whole dataset, in order to remove it, so doing something like
indexOfChild
isn't acceptable too: I tried, but this method gives you the position of the item in the visibile part of the list, thus makinglist.remove(position)
impossible. -
kovac777 over 5 yearsThis method is not optimal for performance.!!! Click listeners more efficiantly setup in constructor of ViewHolder.
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Vishnu M. over 5 yearsThe onBindViewHolder() method is called every single time a new item is shown in the RecyclerView, so if you have a very large list you end up needlessly creating hundreds or even more click listeners. Creating the listeners in the ViewHolder limits the number of listeners created to a reasonable amount. (roughly the number of items on the screen)
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user2167877 over 5 yearsI agree especially if the number of items is dynamic not static.
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t3chb0t over 3 yearsWhat a terrible design that you have to actually set this and just overriding
onClick
doesn't work. Very intuitive :-\