RecyclerView OnClickListener using interface

Question

I use RecyclerView adapter to display data inside an activity, I want to implement onClickListener inside the activity, currently, I am setting

Answer 1

You can let your Activity implements View.OnClickListener and pass it to adapter. Below is an example.

class  RAdapter extends RecyclerView.Adapter<>{
    View.OnClickListener listner;
    public RAdapter(View.OnClickListener listner) {
        this.listner = listner;
    }
    public void onBindViewHolder(MyHolder holder, final int position) {
        holder.vname.setOnClickListener(listner);

    }
}

But to handle click in Activity you will going to need clicked position. You can have it with adapter.getAdapterPosition() to validate which item is clicked.

Apart from that if you already have reference of Activity you can have OnClick inside adapter and call a public method of Activity with position to perform action.

A better way to handle clicks in ViewHolder. See the below example.

class Holder extends RecyclerView.ViewHolder implements View.OnClickListener {
        Button button;
        public Holder(View itemView) {
            super(itemView);
            button=itemView.findViewById(R.id.b1);
            button.setOnClickListener(this);
        }
        @Override
        public void onClick(View v) {
            if(v.getId()==R.id.b1){
                int position=getAdapterPosition();
                // Call a public method of Activity here 
                // with postion
            }
        }
    }