Recycle View scrolls slow. How to fix it ?

[iharshb]

Hello, I just implemented expandable layout in recycle view . Data coming from web-service and passing array-list through adapter. Layout row file in Nested Linear Layouts. (may be its layouts load but I tried with Constraint layout . No Effect)
I am still finding the issue ! I am replacing view during expansion and collapse item view (I already commented that code. but still my recycle view is slow ) There is no use of any image storing in itemview . Help me to fix this issue.

for more details about question https://stackoverflow.com/questions/45790906/recycle-view-scrolls-slow-how-to-fix-it

`public class PendingOrdersAdapter extends RecyclerView.Adapter<PendingOrdersAdapter.ViewHolder> {

public LayoutInflater mInflater;
public HashSet<Integer> mExpandedPositionSet = new HashSet<>();
Context context;
ArrayList<CustomerDetails> list;


public PendingOrdersAdapter(Context context, ArrayList<CustomerDetails> list) {
    this.context = context;
    this.list = list;
    this.mInflater = LayoutInflater.from(context);
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View item = mInflater.inflate(R.layout.pending_order_item, parent, false);
    return new ViewHolder(item);
}


@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {

    holder.updateItem(position, holder);
    holder.tvOrderNo.setText("" + list.get(position).getOrderID());
    holder.tvCustomerName.setText("" + list.get(position).getCustomerName());
    holder.tvTotalPrice.setText("" + list.get(position).getTotalPrice());
    holder.tvCustomerContactNo.setText("" + list.get(position).getPrimaryContactNo());
    holder.tvProductWeight.setText("" + list.get(position).getProductWeight());
    holder.tvCustomerStatus.setText("" + list.get(position).getCustomerStatus());
    holder.tvDeliveryManStatus.setText("" + list.get(position).getDeliveryManStatus());
    holder.tvAddress.setText("" + list.get(position).getAddress());
    holder.tvDeliveryMan.setText("" + list.get(position).getCustomerName() + " ( " + list.get(position).getPrimaryContactNo() + " ) ");
    holder.tvTime.setText("" + list.get(position).getTime());
    holder.tvPickUpDate.setText("" + list.get(position).getPickupDate());

    holder.tvDeliveryCharge.setText("" + list.get(position).getDeliveryCharge());
  /*  cusLocation = list.get(position).getCusLocation();
    boLocation = list.get(position).getBoLocation();*/
  
  
  //Opening DialogFragment on Click Listner

    holder.tvDeliveryMan.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            AppCompatActivity activity = (AppCompatActivity) (context);

            android.app.FragmentTransaction ft = activity.getFragmentManager().beginTransaction();
            android.app.Fragment prev = activity.getFragmentManager().findFragmentByTag("dvdialog");
     
            if (prev != null) {
                ft.remove(prev);
            }
            ft.addToBackStack(null);

            DeliveryManDetailsDialog newFragment = new DeliveryManDetailsDialog();
            newFragment.show(ft, "dvdialog");

        }
    });

    holder.tvAddress.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            final int DRAWABLE_RIGHT = 2;

            
            //Address icon click listner right side
            
            if (event.getAction() == MotionEvent.ACTION_UP) {
                if (event.getRawX() >= (holder.tvAddress.getRight() - holder.tvAddress.getCompoundDrawables()[DRAWABLE_RIGHT].getBounds().width())) {

                    // your action here
                    Intent intent = new Intent(context, RouteActivity.class);
                    intent.putExtra("custLat", list.get(position).getCustLatitude());
                    intent.putExtra("custLong", list.get(position).getCustLongitude());
                    intent.putExtra("boLat", list.get(position).getBoLatitude());
                    intent.putExtra("boLong", list.get(position).getBosLongitude());

                    context.startActivity(intent);


                }


                return true;

            }
            return true;
        }
    });


}

@Override
public int getItemViewType(int position) {
    return position;
}

@Override
public int getItemCount() {
    return list.size();
}

public void registerExpand(int position, ViewHolder holder) {
    
    if (mExpandedPositionSet.contains(position)) {
        
        //Replacing views at runtime and arrow animation
        
        ViewGroupUtils.replaceView(holder.timeLayout, holder.statusLayout);
        
        holder.orderbox.setBackgroundResource(R.drawable.box_fill_drawable);
        holder.ivArrow.animate().rotation(360).start();
        removeExpand(position);

       


    } else {
        ViewGroupUtils.replaceView(holder.statusLayout, holder.timeLayout);
        
        holder.orderbox.setBackgroundResource(R.drawable.box_fill_drawable_top);
        holder.ivArrow.animate().rotation(180).start();
        addExpand(position);


    }
}

public void removeExpand(int position) {


    mExpandedPositionSet.remove(position);


}

public void addExpand(int position) {


    mExpandedPositionSet.add(position);

}

public class ViewHolder extends RecyclerView.ViewHolder {
    public ExpandableLayout expandableLayout;
    public LinearLayout orderbox, orderbox_bottom;
    public ImageView ivArrow;
    public TextView tvAddress, tvOrderNo, tvCustomerName, tvTotalPrice, tvCustomerContactNo;
    public TextView tvProductWeight, tvCustomerStatus, tvDeliveryManStatus;
    public TextView tvDeliveryCharge, tvDeliveryMan, tvTime;
    public TextView tvPickUpDate;
    public LinearLayout statusLayout, statusParentLayout, timeLayout, timeParentLayout, addressLayout;


    public ViewHolder(final View itemView) {
        super(itemView);
        expandableLayout = (ExpandableLayout) itemView.findViewById(R.id.expandable_layout);
        orderbox = (LinearLayout) itemView.findViewById(R.id.orderbox);

        orderbox_bottom = (LinearLayout) itemView.findViewById(R.id.orderbox_bottom);
        ivArrow = (ImageView) itemView.findViewById(R.id.ivArrow);

        tvOrderNo = (TextView) itemView.findViewById(R.id.tvOrderNo);
        tvCustomerName = (TextView) itemView.findViewById(R.id.tvCustomerName);
        tvTotalPrice = (TextView) itemView.findViewById(R.id.tvTotalPrice);
        tvCustomerContactNo = (TextView) itemView.findViewById(R.id.tvCustomerContactNo);
        tvProductWeight = (TextView) itemView.findViewById(R.id.tvProductWeight);
        tvCustomerStatus = (TextView) itemView.findViewById(R.id.tvCustomerStatus);
        tvDeliveryManStatus = (TextView) itemView.findViewById(R.id.tvDeliveryManStatus);
        tvDeliveryCharge = (TextView) itemView.findViewById(R.id.tvDeliveryCharge);
        tvAddress = (TextView) itemView.findViewById(R.id.tvAddress);
        tvDeliveryMan = (TextView) itemView.findViewById(R.id.tvDeliveryMan);
        tvTime = (TextView) itemView.findViewById(R.id.tvTime);
        tvPickUpDate = (TextView) itemView.findViewById(R.id.tvPickUpDate);

        statusParentLayout = (LinearLayout) itemView.findViewById(R.id.statusParentLayout);
        statusLayout = (LinearLayout) itemView.findViewById(R.id.statusLayout);
        timeParentLayout = (LinearLayout) itemView.findViewById(R.id.timeParentLayout);
        timeLayout = (LinearLayout) itemView.findViewById(R.id.timeDateLayout);
        addressLayout = (LinearLayout) itemView.findViewById(R.id.addressLayout);
    }

    public void updateItem(final int position, final ViewHolder holder) {
        holder.orderbox.setBackgroundResource(R.drawable.box_fill_drawable_top);
        holder.expandableLayout.setOnExpandListener(new ExpandableLayout.OnExpandListener() {
            @Override
            public void onExpand(boolean expanded) {

                registerExpand(position, holder);

            }
        });

        expandableLayout.setExpand(mExpandedPositionSet.contains(position));

    }
}

}`