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 try {

    JSONObject reader = new JSONObject(response);

    JSONArray arr_ob = reader.getJSONArray("categories");

    for (int i = 0; i < arr_ob.length(); i++) {
     JSONObject for_cat_ob = arr_ob.getJSONObject(i);
     String cat_name = for_cat_ob.getString("cat_name");
     Log.d("peh19", "  " + cat_name);
    }

    Category_name = reader.getString("cat_name");
    // Category_image = reader.getString("cat_image");

    Log.d("abc12", Category_name + "");
    // Log.d("abc", Category_image + "");

   } catch (JSONException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    Log.d("5jan", e.toString() + " I catched");
   }
  } catch (Exception e) {
   Log.d("16test", e.toString());
  }

 }

{
    "categories": [
        {
            "cat_id": "99",
            "cat_name": "Smart Phones",
            "cat_image": "http://www.crazzybazaar.com/Bussiness_user/shoplogo/312590apple.png",
            "products": [
                {
                    "p_id": "187",
                    "p_name": "Panasonic P31",
                    "p_image": "http://www.crazzybazaar.com/Bussiness_user/productImages/thumb/thumb_5137337201433255PM_635_panasonic_p31.jpeg",
                    "p_mrp_price": "11490",
                    "p_discount": "39%",
                    "p_price": "6990"
                },
                {
                    "p_id": "186",
                    "p_name": "Micromax A177 Canvas Juice",
                    "p_image": "http://www.crazzybazaar.com/Bussiness_user/productImages/thumb/thumb_318162321201412001PM_635_micromax_canvas_juice_a177.jpeg",
                    "p_mrp_price": "9999",
                    "p_discount": "38%",
                    "p_price": "6190"
                },
                {
                    "p_id": "185",
                    "p_name": "Gionee Pioneer P3",
                    "p_image": "http://www.crazzybazaar.com/Bussiness_user/productImages/thumb/thumb_424142679290223154018158501654882165484016547841353714p2side13821784711383385287138736474713873656261387365852138917517213922782511395644013.png",
                    "p_mrp_price": "7549",
                    "p_discount": "15%",
                    "p_price": "6449"
                }
            ]
        },
        {
            "cat_id": "100",
            "cat_name": "Cell Phones",
            "cat_image": "http://www.crazzybazaar.com/Bussiness_user/shoplogo/42320mobile178.png",
            "products": [
                {
                    "p_id": "195",
                    "p_name": "Spice Boss Rhythm M-5367",
                    "p_image": "http://www.crazzybazaar.com/Bussiness_user/productImages/thumb/thumb_138590spicebossrhythmm5367mobilephoneblackmediumff1e25974bbcba9bcadbc1c0442b41c21391593374.jpg",
                    "p_mrp_price": "1560",
                    "p_discount": "18%",
                    "p_price": "1275"
                },
                {
                    "p_id": "194",
                    "p_name": "Spice Mi-300",
                    "p_image": "http://www.crazzybazaar.com/Bussiness_user/productImages/thumb/thumb_4985085302013103651AM_635_spice_mi_300.png",
                    "p_mrp_price": "2650",
                    "p_discount": "9%",
                    "p_price": "2400"
                },
                {
                    "p_id": "193",
                    "p_name": "Gionee L700",
                    "p_image": "http://www.crazzybazaar.com/Bussiness_user/productImages/thumb/thumb_310664Gionee L700.jpg",
                    "p_mrp_price": "1995",
                    "p_discount": "10%",
                    "p_price": "1799"
                }
            ]
        }
    ]
}