Intent

@Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {
        holder.textHeader.setText(mDataSet.get(position).name);
        holder.textFooter.setText(mDataSet.get(position).age);
        holder.imageview.setImageResource(mDataSet.get(position).photoId);

         holder.relativeLayout.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 Intent intent = new Intent(mainActivity , DetailActivity.class);
                 intent.putExtra("id" , position );
                 mainActivity.startActivityForResult(intent , 1);
             }
         });