Value of null 0 java.lang.String cannot be converted to JSONObject [android]

Question

I am working on Coverage area for restaurants where I need to display message if the selected restaurant is not in coverage area. If it is in coverage area, the user can proceed to order the meal.

As far as there is restaurant is not null means if the restaurant is in coverage area, the app is running perfectly. When there is no coverage, say the JSON Array is null then the above mentioned error is displaying in catch block.

Here is the code:

`public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
                    super.onSuccess(statusCode, headers, response);
                    progressActivity.showContent();
                    JSONObject[] restaurants_arr = null;

                    hasCoverage = true;
                    try {
                        if (response != null)
                        {

                            JSONArray restaurants = response.getJSONArray("restaurants");

                            // if restaurants deliver to that area
                            if (restaurants.length() > 0 && restaurants.getJSONObject(0) != null)
                            {

                                restaurants_arr = new JSONObject[restaurants.length()];

                                int has_coverage = 1; // assume coverage is there..

                                for (int j = 0; j < Utils.cart_restaurants.size(); j++)
                                {
                                    RestaurantModel restaurant = Utils.cart_restaurants.get(j);
                                    String restaurantCartID = restaurant.getId();

                                    boolean found = false;
                                    for (int i = 0; i < restaurants.length(); i++) {
                                        restaurants_arr[i] = restaurants.getJSONObject(i);

                                        String restaurantID = restaurants_arr[i].get("restaurant_id").toString();

                                        if (restaurantCartID.equals(restaurantID))
                                        {
                                            found = true;
                                            break;
                                        }
                                    }  //end of inner for
                                    if (found == false)
                                    {
                                        Toast.makeText(CheckoutActivity.this, "There is no coverage for the Selected Area ", Toast.LENGTH_SHORT).show();
                                        hasCoverage = false;
                                        break;
                                    }

                                }
                                //end of outer for
                            } //end of if

                            else //if restaurants don't deliver to that area
                            {
                                hasCoverage = false;
                            }

                        } // end of if response != null
                        if(hasCoverage)
                        {
                            processOrder();
                        }
                        else
                        {
                            Toast.makeText(CheckoutActivity.this, "There is no coverage for the Selected Area ", Toast.LENGTH_SHORT).show();
                        }
                    } // end of try
                    catch (Exception ex) {
                        GSLogger.e(ex);
                        showError();
                    }
                }

`

When i set debug point, It not allowing me to get inside of if (restaurants.length() > 0 && restaurants.getJSONObject(0) != null) { this line.

Jacky · Accepted Answer · 2017-07-23 10:23:00Z

1

This is the Only change I made. Now It is working perfectly. if (!restaurants.getString(0).equals("null"))

answered Jul 23, 2017 at 10:23

Jacky

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Comments

anil90 · Accepted Answer · 2017-07-23 09:43:12Z

0

Apply a check to see if restaurant null

if (restaurant !=null && restaurants.length() > 0 && restaurants.getJSONObject(0) != null)

edited Jul 23, 2017 at 9:43

answered Jul 23, 2017 at 9:18

anil90

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2 Comments

Jacky Over a year ago

same error. JSONArray is null. I want to display toast message rather than going into try catch block

Mehran Zamani Over a year ago

print restaurants or toggle a breakpoint to see its value.

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