My listview is not displayin its content : Here is the code for MainActivity
How to view listview products please suggest me as soon as possible

    public class ProductList extends AppCompatActivity {
    public static ArrayList<ItemProductList> values1=new ArrayList<ItemProductList>();
    ListView list_productlist;
    Context context = this;
    public ItenProductAdapter mAdapter;
    String category,name1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_product_list);
        list_productlist = (ListView) findViewById(R.id.list_productlist);
        category=getIntent().getStringExtra("category");
        name1=getIntent().getStringExtra("name");
        loadJSON();
        mAdapter= new ItenProductAdapter(context,values1);
        list_productlist.setAdapter(mAdapter);
    }

    private void loadJSON() {
        StringRequest jsonObjReq = new StringRequest(Request.Method.POST,
                "http://arshinfosystems.co.in/demo/AoneRubber/productlist.php",
                new Response.Listener<String>() {


                    @Override
                    public void onResponse(String response) {
                        try {
                            JSONObject jObject = new JSONObject(response);
                            JSONArray jsonArray = jObject.getJSONArray("cart");
                            for (int i = 0; i < jsonArray.length(); i++) {

                                JSONObject jbjct = jsonArray.getJSONObject(i);
                                ItemProductList itemListModel = new ItemProductList();
                                itemListModel.thickness1 = jbjct.getString("thickness");
                                itemListModel.id1 = jbjct.getString("id");
                                itemListModel.price1 = jbjct.getString("price");
                                itemListModel.category1 = jbjct.getString("category");
                                itemListModel.name1=jbjct.getString("name");
                                itemListModel.sr_no=jbjct.getString("sr_no");
                                values1.add(itemListModel);
                            }


                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError error) {

                Toast.makeText(ProductList.this, error.toString(), Toast.LENGTH_SHORT).show();

            }
        }) {
            @Override
            protected Map<String, String> getParams() {
                Map<String, String> params = new HashMap<String, String>();
                params.put("category", category);
                params.put("name", name1);
                return params;
            }
        };
        jsonObjReq.setRetryPolicy(new DefaultRetryPolicy(50000,
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(jsonObjReq);
    }
}



Here is the code for Adapter
How to view listview products please suggest me as soon as possible please guys

    public class ItenProductAdapter extends BaseAdapter {
    public static ArrayList<ItemProductList> list1;
    String idValues = "";
    Context context;
    public static Integer total;
    Bitmap mIcon11 = null;
    ViewHolder holder;

    public ItenProductAdapter(Context context, ArrayList<ItemProductList> list) {
        super();
        this.list1 = list;
        this.context = context;


    }

    @Override
    public int getCount() {
        return 0;
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }
    static class ViewHolder {
        TextView txt_sr_no;
        TextView txt_thickness;
        TextView txt_rates;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {

            holder=new ViewHolder();
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.product_list_item, null);

            holder.txt_sr_no= (TextView) convertView.findViewById(R.id.txt_sr_no);
            holder.txt_thickness= (TextView) convertView.findViewById(R.id.txt_thickness);
            holder.txt_rates= (TextView) convertView.findViewById(R.id.txt_rates);

            convertView.setTag(holder);


        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.txt_sr_no.setText(list1.get(position).sr_no+")");
        holder.txt_thickness.setText(""+ list1.get(position).thickness1);
        holder.txt_rates.setText("RS "+list1.get(position).price1);




        return convertView;
    }
}

