如何在使用来自服务器的json提要时快速生成我的android应用程序

我在电子商务网站(magento 2)上生成了一个应用程序,当我试图启动我的应用程序时,它的处理速度非常慢,因为我的服务器中有许多产品。在使用JSON提要时,有没有任何可能的方法来加快我使用异步任务的速度。。请告诉我任何可能的方法

我的异步任务编码之一:

private class GetProduct extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // Showing progress dialog
        dialog_pro = new ProgressDialog(Healthy_Cat.this);
        dialog_pro.setMessage("Please wait...");
        dialog_pro.setCancelable(false);
        dialog_pro.show();

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        HttpHandler sh = new HttpHandler();
        String jsonStr = sh.makeServiceCall(url);



        if (jsonStr != null) {
            try {


                JSONArray items = new JSONArray(jsonStr);
                for (int i = 0; i < items.length(); i++) {
                    JSONObject c = items.getJSONObject(i);
                    pro_name = c.getString("name");
                    String price = c.getString("price");
                    JSONArray array = c.getJSONArray("custom_attributes");
                    for (int k = 0; k < array.length(); k++) {
                        JSONObject jb = array.getJSONObject(k);
                        String attr = jb.getString("attribute_code");

                        if (attr.equalsIgnoreCase("special_price")) {

                            splprice = jb.getString("value");

                        }
                    }


                    String sku = c.getString("sku");

                    JSONArray media = c.getJSONArray("media_gallery_entries");

                    for(int k = 0; k < media.length(); k++) {
                        JSONObject jb = media.getJSONObject(k);

                        String imageURL =  BaseURL_Helper.MediaBase +jb.getString("file");

                        media_image = imageURL;

                        // tmp hash map for single contact
                        Beanclass dataSet = new Beanclass();
                        dataSet.setTitle(pro_name);
                        dataSet.setImage(imageURL);
                        dataSet.setPrice(price);
                        dataSet.setSPLPrice(splprice);
                        dataSet.setSku(sku);
                        list.add(dataSet);

                        BeanclassList data = new BeanclassList();
                        data.setTitle(pro_name);
                        data.setImage(imageURL);
                        data.setSku(sku);
                        data.setSPLPrice(splprice);
                        data.setPrice(price);
                        listbean.add(data);

                    }

                }
            }catch (final JSONException e) {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        no_list.setVisibility(View.VISIBLE);

                    }
                });

            }
        } else {

            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(getApplicationContext(),
                            "May be Network error!!",
                            Toast.LENGTH_LONG)
                            .show();
                }
            });

        }

        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        super.onPostExecute(result);
        // Dismiss the progress dialog
        /**
         * Updating parsed JSON data into ListView
         * */
        if (dialog_pro.isShowing())
            dialog_pro.dismiss();

        mAdapter = new GridviewAdapter(Healthy_Cat.this,list);
        gridlist.setAdapter(mAdapter);

        Listadapter = new ListviewAdapter(Healthy_Cat.this,listbean);
        listview_pro.setAdapter(Listadapter);

    }

}