update RecyclerView after on click button plus

[javaddehban]

I have a shopping cart In this cart, I want to click on the plus button My RecyclerView will be upgraded

In this cart, I want to click on the mines button My RecyclerView will be upgraded
my code :

``
`public class ShopCartAdapter extends RecyclerView.Adapter<ShopCartAdapter.ShopCartHolder> {
List mDataset;
Context context;
String email, password;
List list;
TestTest adapter;

public void update(List<ShopCartGet> array) {
    mDataset = array;
    notifyDataSetChanged();
}



public class ShopCartHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    TextView title, price;
    TextView number_order, priceall;
    ImageView img, delete, minus, plus;
    Spinner sp;
    TextView id;
    int currentNos;
    int ids = 0;

    public void update(List<ShopCartGet> list) { 
        mDataset = list; 
        notifyDataSetChanged(); 
    }
    public void delete(int position) {
        list.remove(position);
        notifyItemRemoved(position);
    }

    public void increment() {
        currentNos = Integer.parseInt(number_order.getText().toString());
        number_order.setText(String.valueOf(++currentNos));
        ids = Integer.parseInt(id.getText().toString());
        email = ShopCart.string_from_sp;
        password = ShopCart.string_from_sp1;
    }

    public void Decrease() {
        currentNos = Integer.parseInt(number_order.getText().toString());
        number_order.setText(String.valueOf(--currentNos));
        ids = Integer.parseInt(id.getText().toString());
        email = ShopCart.string_from_sp;
        password = ShopCart.string_from_sp1;
    }

    public void update() {
        String BASE_URL = "http://laravel.cahoo.ir/json/android/update_basket.php";
        StringRequest stringRequest = new StringRequest(Request.Method.POST, BASE_URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
            }
        }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> params = new HashMap<>();
                params.put("email", email);
                params.put("order_id", String.valueOf(ids));
                params.put("number_order", String.valueOf(currentNos));
                params.put("password", password);

                return params;
            }

            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                return super.getHeaders();
            }
        };
        stringRequest.setRetryPolicy(new DefaultRetryPolicy(20000, 1, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
        RequestQueue queue = Volley.newRequestQueue(context);
        queue.add(stringRequest);

    }

    public void delete() {

        String BASE_URL = "xxx";


        StringRequest stringRequest = new StringRequest(Request.Method.POST, BASE_URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {


            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {


            }
        }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> params = new HashMap<>();
                params.put("email", email);
                params.put("order_id", String.valueOf(ids));
                params.put("number_order", String.valueOf(currentNos));
                params.put("password", password);


                return params;
            }

            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                return super.getHeaders();
            }
        };
        stringRequest.setRetryPolicy(new DefaultRetryPolicy(20000, 1, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
        RequestQueue queue = Volley.newRequestQueue(context);
        queue.add(stringRequest);

        notifyDataSetChanged();
    }

    public ShopCartHolder(View itemView) { 
        super(itemView);
        title = (TextView) itemView.findViewById(R.id.text_info);
        number_order = (TextView) itemView.findViewById(R.id.number_order);
        price = (TextView) itemView.findViewById(R.id.price);
        priceall = (TextView) itemView.findViewById(R.id.priceall);
        img = (ImageView) itemView.findViewById(R.id.image_mahsol);
        delete = (ImageView) itemView.findViewById(R.id.delet);
        minus = (ImageView) itemView.findViewById(R.id.minus);
        plus = (ImageView) itemView.findViewById(R.id.plus);
        id = (TextView) itemView.findViewById(R.id.ids);

        delete.setOnClickListener(this); //button onclick listener


        plus.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                increment();

                update();


            }
        });
        minus.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Decrease();
                update();

            }
        });
        delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.i("salam", "imag");
                delete();
            }
        });

    }



    @Override
    public void onClick(View v) {
        delete(getAdapterPosition()); //calls the method above to delete
    }


}

public ShopCartAdapter(Context context, List<ShopCartGet> myDataset) {
    this.mDataset = myDataset;
    this.context = context;

}

@Override
public ShopCartAdapter.ShopCartHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.sample_shop_cart, parent, false);
    ShopCartAdapter.ShopCartHolder dataObjectHolder = new ShopCartAdapter.ShopCartHolder(view);
    return dataObjectHolder;
}

@Override
public void onBindViewHolder(final ShopCartAdapter.ShopCartHolder holder, final int position) {

    holder.title.setText(mDataset.get(position).title);
    holder.price.setText(mDataset.get(position).price);
    holder.number_order.setText(mDataset.get(position).number_order);
    holder.id.setText(String.valueOf(mDataset.get(position).id));
    holder.priceall.setText(mDataset.get(position).pricall);

    Picasso.with(context)
            .load(mDataset.get(position).img)
            .placeholder(R.drawable.logolo)
            .into(holder.img);
}


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

public void delete(int position) { //removes the row
    mDataset.remove(position);
    notifyItemRemoved(position);
}

}
`