在NestedScrollView中使用RecycerView时性能不良

Question

recyclerView.setNestedScrollingEnabled(false);

在Androidmanifest中:

android:windowSoftInputMode="adjustNothing"

public class RecyclerContactAdapter extends RecyclerView.Adapter<RecyclerContactAdapter.ViewHolder> {

    private List<MobileContact> contacts;
    private Context context;

    public RecyclerContactAdapter() {
        contacts = new ArrayList<>();
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        this.context = parent.getContext();
        View view = LayoutInflater.from(context)
                .inflate(R.layout.item_recycler_contact, parent, false);

        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        //set data for view
    }

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

    protected class ViewHolder extends RecyclerView.ViewHolder {
        private TextView tvAlphabetHeader;
        private CircleImageView civAvatar;
        private TextView tvContactName;
        private TextView tvStatus;
        private CheckBox cbInvited;
        private RelativeLayout rlAlphabetHeader;
        private RelativeLayout rlContainer;

        protected ViewHolder(View itemView) {
            super(itemView);
            tvAlphabetHeader = itemView.findViewById(R.id.item_recycler_contact_tv_alphabet_header);
            civAvatar = itemView.findViewById(R.id.item_recycler_contact_civ_avatar);
            tvContactName = itemView.findViewById(R.id.item_recycler_contact_tv_name);
            tvStatus = itemView.findViewById(R.id.item_recycler_contact_tv_status);
            cbInvited = itemView.findViewById(R.id.item_recycler_contact_cb_contact);
            rlAlphabetHeader =  itemView.findViewById(R.id.item_recycler_contact_rl_alphabet);
            rlContainer = itemView.findViewById(R.id.item_recycler_contact_rl_contact);
        }
    }

    public void addAll(List<MobileContact> mobileContacts) {
        this.contacts.clear();
        this.contacts.addAll(mobileContacts);
        notifyDataSetChanged();
    }

    public void add(MobileContact mobileContact) {
        this.contacts.add(mobileContact);
    }

    public List<MobileContact> getContacts() {
        return this.contacts;
    }

}