How to parseResult [JSONArray]?

Question

I am getting JSON data. How to use JSONArray when download & display image in GridView. How can I do acheive this? I refer Download and Display Image in Android GridView. It is JSONObject.

here is my code.

private void parseResult(String result) {
    try {
        JSONObject response = new JSONObject(result);
        JSONArray posts = response.optJSONArray("posts");
        GridItem item;
        for (int i = 0; i < posts.length(); i++) {
            JSONObject post = posts.optJSONObject(i);
            item = new GridItem();
            JSONArray img = post.getJSONArray("img");
            if (null != attachments && attachments.length() > 0) {
                JSONObject attachment = attachments.getJSONObject(0);
                if (img!= null)
                    item.setImage(img.getString("url"));
            }
            mGridData.add(item);
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

here is refer code,

{
  "status": "ok",
  "count": 45,
  "count_total": 397,
  "pages": 9,
  "posts": [
    {
      "id": 12378,
      "url": "http://stacktips.com/tutorials/android/speech-to-text-in-android",
    },
    {...},
    {...}
  ]
}

here is my JSON,

[
  {
    "id": "95",
    "name": "Cherry",
    "menu": [
      {
        "menu_id": "18",
        "img": "925dd3ad6d50fa5686a82af26515be5d.jpg"
      }
    ]
  },
  {...},
  {...}
]

oh, why you have to use JSONArray? you don't map your json string to java object? — Luong Dinh
– Luong Dinh, Commented Feb 21, 2017 at 9:00

rafsanahmad007 · Accepted Answer · 2017-02-21 09:32:02Z

2

try this code :

For refer code:

try{
    JSONObject  object = new JSONObject (result);
    JSONArray jsonArray = object.getJSONArray("posts");
    for(int i=0;i<jsonArray.length();i++){
         JSONObject object = jsonArray.getJSONObject(i);
         String id = object.getString("id");
         String img_url = object.getString("url");

         item = new GridItem();
          if (img_url!= null)
                   item.setImage(img_url);
            mGridData.add(item);
        }
     }
     catch (JSONException e){
           e.printStackTrace();
    }

For second JSON

 try{
    JSONArray jsonArray = new JSONArray(result);
    for(int i=0;i<jsonArray.length();i++){
         JSONObject object = jsonArray.getJSONObject(i);
         String id = object.getString("id");
         String name = object.getString("name");

         JSONArray menu = object.getJSONArray("menu");
         for(int j=0;j<menu.length();j++){
             JSONObject menu_object = menu.getJSONObject(j);
             String menu_id = menu_object.getString("menu_id");
             String image_url = menu_object.getString("img");
             item = new GridItem();
              if (image_url!= null)
                       item.setImage(image_url);
                mGridData.add(item);
            }
        }
     }
     catch (JSONException e){
           e.printStackTrace();
}

edited Feb 21, 2017 at 9:32

answered Feb 21, 2017 at 9:04

rafsanahmad007

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6 Comments

WPG Over a year ago

img.getString("url") I change image_url but can't solve method getString

rafsanahmad007 Over a year ago

check the edit...and there is two JSON ? which JSON image url u want to parse?

WPG Over a year ago

org.json.JSONException: Index 0 out of range [0..0) image_url is null

WPG Over a year ago

I use For second JSON; i add GridItem item; before for loop.

WPG Over a year ago

Log.i("hello",image_url); hello: 925dd3ad6d50fa5686a82af26515be5d.jpg but it doesn't show in GridView. I think something wrong me another code . Thank you

|

Patel Jaymin · Accepted Answer · 2017-02-21 09:08:23Z

1

Here is your solution :

    try {
        JSONObject response = new JSONObject(result);

        JSONArray menu = response.optJSONArray("menu");

        GridItem item;

        for (int i = 0; i < menu.length(); i++) {

            JSONObject post = menu.optJSONObject(i);

            String menu_id=post.getString("menu_id");

            String img=post.getString("img");


            item = new GridItem();

            item.setImage(img);


            mGridData.add(item);

        }
    } 
}

answered Feb 21, 2017 at 9:08

Patel Jaymin

2611 silver badge11 bronze badges

Comments

Kanaiya Katarmal · Accepted Answer · 2017-02-21 09:21:01Z

Please use google-gson library link

Example JSON String

{
  "title": "Free Music Archive - Albums",
  "message": "",
  "errors": [],
  "total": "11259",
  "total_pages": 2252,
  "page": 1,
  "limit": "5",
  "dataset": [
    {
      "album_id": "7596",
      "album_title": "Album 1",
      "images": [
        {
          "image_id": "1",
          "user_id": null
        }
      ]
    }
  ]
}

Albums.java

class Albums {
    public String title;
    public String message;
    public List<string> errors = new ArrayList<string>();
    public String total;
    public int total_pages;
    public int page;
    public String limit;
    List<dataset> dataset = new ArrayList<dataset>();
}

Main Class

Albums albums = gson.fromJson(jsonString, Albums.class);

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