如何使用volley解析android中的json数组

Question

我试图获取这个 JSON 数组，但没有得到结果。有人可以告诉我如何使用齐射吗？我需要预订中的所有数据。请帮助我实现它。

{
    "code": 200,
    "savebooking": [
        {
            "Booking": {
                "id": "304",
                "contributor_id": "16",
                "table_of_content_id": "6791",
                "composition_id": "7469",
                "completion": "2017-06-30",
                "approved": null,
                "cdn_id": "328301423",
                "secret_token": "s-riQMc",
                "uploaded_on": "2017-06-16 07:51:35",
                "created": "2017-06-16 07:48:31",
                "modified": "2017-06-16 07:51:35"
            }
        },
        {
            "Booking": {
                "id": "305",
                "contributor_id": "16",
                "table_of_content_id": "6791",
                "composition_id": "7470",
                "completion": "2017-06-30",
                "approved": null,
                "cdn_id": "328318377",
                "secret_token": "s-naSse",
                "uploaded_on": "2017-06-16 10:43:39",
                "created": "2017-06-16 07:48:31",
                "modified": "2017-06-16 10:43:39"
            }
        },
        {
            "Booking": {
                "id": "306",
                "contributor_id": "16",
                "table_of_content_id": "6791",
                "composition_id": "7471",
                "completion": "2017-06-30",
                "approved": null,
                "cdn_id": null,
                "secret_token": null,
                "uploaded_on": null,
                "created": "2017-06-16 07:48:31",
                "modified": "2017-06-16 07:48:31"
            }
        },
        {
            "Booking": {
                "id": "307",
                "contributor_id": "16",
                "table_of_content_id": "6791",
                "composition_id": "7472",
                "completion": "2017-06-30",
                "approved": null,
                "cdn_id": null,
                "secret_token": null,
                "uploaded_on": null,
                "created": "2017-06-16 07:48:31",
                "modified": "2017-06-16 07:48:31"
            }
        }
    ]
}

如何使用 volley 解析此 JSON 响应？我已经尝试过但没有得到结果。

StringRequest postStringRequest = new StringRequest(Request.Method.POST, BOOK_API,
        new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                Log.d(TAG, "Response Check :" + response);
                try {
                    JSONObject json = new JSONObject(response);
                    JSONObject booking = json.getJSONArray("savebooking").getJSONObject("Booking");
                    Log.d(TAG, "booking Response Check :" + booking);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        });

Answer 1

这是

 //Here is main response object
JSONObject json = new JSONObject(response);

 //now get your  json array like this 
JSONArray booking = json.getJSONArray("savebooking");

// 现在检查数组长度 > 0

if(booking.length ()> 0){

 for(int countItem = 0;countItem<booking.length;countItem++){

       JSONObject bookingObject = booking.getJsonObject(countItem);

       String id = bookingObject.isNull("id")?"":bookingObject.optString("id");
   list.add(id);


 }

}