Showing error

BackgroundTask.java

package in.apptonic.lalit.cardviewsample;

import android.content.Context;
import android.widget.Toast;

import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;

import in.apptonic.lalit.cardviewsample.model.News;

/**
 * Created by lalitkumarsonawane on 03/06/17.
 */

public class BackgroundTask {

    Context context;
    ArrayList<News> arrayList = new ArrayList<>();
    String url = "https://newsapi.org/v1/articles?source=techcrunch&sortBy=top&apiKey=eff7c7c5b2b7470e9f785483a9d9520b";


    public BackgroundTask(Context context) {
        this.context = context;
    }

    public ArrayList<News> getList() {

        final JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, url, null,
                new Response.Listener<JSONArray>() {
                    @Override
                    public void onResponse(JSONArray response) {

                        int count = 0;
                        while (count < response.length()) {

                            try {
                                JSONObject jsonObject = response.getJSONObject(count);

                                News news = new News(jsonObject.getString("title"), jsonObject.getString("description"), jsonObject.getString("urlToImage"));
                                arrayList.add(news);
                                count++;


                            } catch (JSONException e) {
                                e.printStackTrace();
                            }

                        }

                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(context, "Error while downloading news", Toast.LENGTH_SHORT).show();
                error.printStackTrace();

            }
        }

        );
        MySingleton.getmInstance(context).addToRequestque(jsonArrayRequest);
        return arrayList;


    }

}