json - using wikipedia api for fetching random articles my android app

Question

It keeps stopping and in summary it shows java.lang.reflect.InvoactonTargetException.... JSONException: No value.....

M uusing this link
https://en.wikipedia.org/w/api.php?format=json&action=query&generator=random&grnnamespace=0&prop=revisions%7Cimages&rvprop=content&grnlimit=10 [Mianctiviy code below] private fun fetchdata() { val url = "https://en.wikipedia.org/w/api.php?action=query&list=allcategories&acprefix=List+of&formatversion=2&format=json" val jsonObjectRequest = JsonObjectRequest(Request.Method.GET, url, null, Response.Listener{ val imgJsonArray = it.getJSONArray("allcategories") val itemarray = ArrayList() for (i in 0 until imgJsonArray.length()) { val imgJsonObject = imgJsonArray.getJSONObject(i) val img = images( imgJsonObject.getString("category"),

                    )
            itemarray.add(img)
        }
        madapter.update_img(itemarray)
    }, {
        Log.d("wkiki","something went wrong")
    })

     // Access the RequestQueue through your singleton class.
    MySingleton.getInstance(this).addToRequestQueue(jsonObjectRequest)
}

Answer 1

your approach to get data and parse json is very old try modern libraries like:

For Http requests:

Retrofit: https://square.github.io/retrofit/

Volley:https://developer.android.com/training/volley

and for json parsing:

Gson:https://github.com/google/gson

Moshi:https://github.com/square/moshi