JSONArray无法在Java中转换为JSONObject

Question

I want to get an json object from this string coming from this JSON file:

{
"categories": {
    "category": [
        {
            "label": "Collaboration",
            "thumbnail": "http://mywebite.com/dfsv",
            "description": "...",
            "contents": {
                "@attributes": {
                    "count": "79"
                }
            },
            "@attributes": {
                "id": "ZSQYN2"
            }
        },
        {
            "label": "Communication",
            "thumbnail": "http://mywebite.com/dfsv",
            "description": "...",
            "contents": {
                "@attributes": {
                    "count": "43"
                }
            },
            "@attributes": {
                "id": "uGQ9MC"
            }
        }
    ],
    "@attributes": {
        "page": "12",
        "limit": "0",
        "count": "111",
        "lang": "en"
    }
}

}

I'm using this code :

JSONObject obj = new JSONObject(myString);

And I got this error message:

Value ... of type org.json.JSONArray cannot be converted to JSONObject

And if I do :

JSONArray obj = new JSONArray(myString);

I got this error message:

Value ... of type org.json.JSONObject cannot be converted to JSONArray

...

Do you have any idea ?

Answer 1

JSONArray and JSONObject are two different things, and should not be type compatible with one another, so these errors make sense. This is a JSONArray:

["foo", "bar", "baz"]

This is a JSONObject:

{ "foo" : "bar", "baz" : "quux" }

You may be looking for JSONElement , which in APIs like Google's GSON is the common superclass between both arrays and objects.

Under the Android JSON API they're also not type compatible.

Answer 2

I've finally found a solution!

I replaced

JSONObject obj = new JSONObject(myString);

by :

JSONObject obj = new JSONObject(myString.substring(myString.indexOf("{"), myString.lastIndexOf("}") + 1));

Answer found here

Hope it will help someone!