Best place to attach onClickListener in recyclerview

问题

While i was looking at some tutorials about recycler view.some of them used the viewHolder constructor to attach the onClick listener while some of them used the onBindViewHolder method. which method is the best place to attach the onclicklistener. i'm really confused

回答1:

The method onBindViewHolder is called every time when you bind your view with data. So there is not the best place to set click listener. You don't have to set OnClickListener many times for the one View. So the best solution is to set click listener in onCreateViewHolder method. But the important thing is a how do you implement on click listener. If you for example want to get some model from list you can use getAdapterPosition() method from ViewHolder.

Look at the exmaple

@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {

    final View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.view_magazine_list_item, null);

    final ViewHolder result = new ViewHolder(view);
    view.setOnClickListener(new OnClickListener(){
          @Override
          public void onClick(View v){
             YourObject yourobject = yourObjectsList.get(result.getAdapterPosition()));
          }
    });
    return result;
}

回答2:

In ViewHolder is the better place:

public static class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

    //views declare here

    public ItemViewHolder(View convertView)
    {
        super(convertView);

        ... ...

        convertView.setOnClickListener(this);
    }



    @Override
    public void onClick(View v)
    {
       //do something to view here
           //also you can get view position by 'getPosition()' here     

    }


}

回答3:

Best practice to use the onClickListener inside the ViewHolder class of the Recyclview like below:-

public class ViewHolder extends RecyclerView.ViewHolder{    
        private View YOUR_VIEW;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            YOUR_VIEW = itemView.findViewById(R.id.YOUR_VIEW);

            YOUR_VIEW.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Toast.makeText(mContext,"Position==>> "+getAdapterPosition(),Toast.LENGTH_LONG).show();

                }
            });
    }
}

来源：https://stackoverflow.com/questions/28904479/best-place-to-attach-onclicklistener-in-recyclerview

标签

android

onclicklistener

android-recyclerview