I am unable to make a network call using Volley

Question

When I am making a network call using jsonObject request. I am not receiving any response. I always receive HTTP response for request=<[ ] before my URL. I have tried these l

Answer 1

Change your DefaultRetryPolicy with this:

DefaultRetryPolicy policy = new DefaultRetryPolicy(0,
                    DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
                    DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
jsonObject.setRetryPolicy(policy);

Answer 2

Another Solution using StringRequest to get Json Response

  private void callApi() {
    RequestQueue mrequestQueue;
    StringRequest stringRequest;
    mrequestQueue = Volley.newRequestQueue(this);
    stringRequest = new StringRequest(Request.Method.GET, DATA_URL, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {

            try {

                JSONObject jsonObject = new JSONObject(response);
                System.out.println("json"+jsonObject);


            } catch (JSONException e) {

                e.printStackTrace();
            }


        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            //Log.i(TAG, "Response: " + error.toString());

        }
    });
    mrequestQueue.add(stringRequest);


}

Answer 3

if your app is getting completed before response then it is causing connection timeout. you must add connection timeout in volley and retry policy also.Here is an example

        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST,
                url,
                request,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {


                    }
                }, new VolleyErrorListener(this, AuthController.LOGIN_ERROR)) {
            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                return new VolleyHeader().getHeaders();
            }
        };
        jsonObjectRequest.setRetryPolicy(new DefaultRetryPolicy(
                50000,
                0,
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
        NetworkRequestQueue.getInstance(mContext).getRequestQueue().add(jsonObjectRequest);

NetworkRequestQueue class is as follows:

public class NetworkRequestQueue {

    private static NetworkRequestQueue mInstance;
    private static Context mCtx;
    private RequestQueue mRequestQueue;
    private ImageLoader mImageLoader;


    private NetworkRequestQueue(Context context) {
        mCtx = context;
        mRequestQueue = getRequestQueue();

        mImageLoader = new ImageLoader(mRequestQueue,
                new ImageLoader.ImageCache() {
                    private final LruCache<String, Bitmap>
                            cache = new LruCache<String, Bitmap>(20);

                    @Override
                    public Bitmap getBitmap(String url) {
                        return cache.get(url);
                    }

                    @Override
                    public void putBitmap(String url, Bitmap bitmap) {
                        cache.put(url, bitmap);
                    }
                });
    }

    public static synchronized NetworkRequestQueue getInstance(Context context) {
        if (mInstance == null) {
            mInstance = new NetworkRequestQueue(context);
        }
        return mInstance;
    }

    public RequestQueue getRequestQueue() {
        if (mRequestQueue == null) {
            Cache cache = new DiskBasedCache(mCtx.getCacheDir(), 10 * 1024 * 1024);
            Network network = new BasicNetwork(new HurlStack());
            mRequestQueue = new RequestQueue(cache, network);
            // Don't forget to start the volley request queue
            mRequestQueue.start();
        }
        return mRequestQueue;
    }

    public ImageLoader getImageLoader() {
        return mImageLoader;
    }

}

Answer 4

Try this using String Request

public class TestActivity extends AppCompatActivity {
        RequestQueue requestQueue;
        String DATA_URL = "http://ec2-54-147-238-136.compute-1.amazonaws.com/hmc/api/getnewsfeeds?order=asc";
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            requestQueue = Volley.newRequestQueue(this);
            callApi();
        }
    
        private void callApi() {
            StringRequest stringRequest = new StringRequest(Request.Method.GET, DATA_URL, new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    Log.e("res", response);
                }
    
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Log.e("onErrorResponse: ", error.getLocalizedMessage());
                }
    
            });
    
            requestQueue.add(stringRequest);
        }

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