// Tag used to cancel the request
String tag_json_obj = "json_obj_req";
String url = "http://api.androidhive.info/volley/person_object.json";

JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,url, null,
      new Response.Listener<JSONObject>() {

        @Override
        public void onResponse(JSONObject response) {
          Log.d(TAG, response.toString());
        }
      }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
          VolleyLog.d(TAG, "Error: " + error.getMessage());
        }
      });

// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq, tag_json_obj);

// Tag used to cancel the request
String tag_string_req = "string_req";

String url = "http://api.androidhive.info/volley/string_response.html";

ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("Loading...");
pDialog.show();   

StringRequest strReq = new StringRequest(Method.GET,
      url, new Response.Listener<String>() {

        @Override
        public void onResponse(String response) {
          Log.d(TAG, response.toString());
          pDialog.hide();

        }
      }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
          VolleyLog.d(TAG, "Error: " + error.getMessage());
          pDialog.hide();
        }
      });

// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);

// Tag used to cancel the request
String tag_json_obj = "json_obj_req";

String url = "http://api.androidhive.info/volley/person_object.json";
ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("Loading...");
pDialog.show();   

  JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
      url, null,
      new Response.Listener<JSONObject>() {

        @Override
        public void onResponse(JSONObject response) {
          Log.d(TAG, response.toString());
          pDialog.hide();
        }
      }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
          VolleyLog.d(TAG, "Error: " + error.getMessage());
          pDialog.hide();
        }
      }) {

    @Override
    protected Map<String, String> getParams() {
      Map<String, String> params = new HashMap<String, String>();
      params.put("name", "Androidhive");
      params.put("email", "abc@androidhive.info");
      params.put("password", "password123");

      return params;
    }

  };

// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq, tag_json_obj);

// Tag used to cancel the request
String tag_json_obj = "json_obj_req";

String url = "http://api.androidhive.info/volley/person_object.json";

ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("Loading...");
pDialog.show();   

JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,url, null,new Response.Listener<JSONObject>() {
  @Override
  public void onResponse(JSONObject response) {
    Log.d(TAG, response.toString());
    pDialog.hide();
  }
}, new Response.ErrorListener() {
  @Override
  public void onErrorResponse(VolleyError error) {
    VolleyLog.d(TAG, "Error: " + error.getMessage());
    pDialog.hide();
  }
}) {

/**
* Passing some request headers
* */
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
  HashMap<String, String> headers = new HashMap<String, String>();
  headers.put("Content-Type", "application/json");
  headers.put("apiKey", "xxxxxxxxxxxxxxx");
  return headers;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq, tag_json_obj);

ImageLoader imageLoader = AppController.getInstance().getImageLoader();
// If you are using NetworkImageView
imgNetWorkView.setImageUrl(Const.URL_IMAGE, imageLoader);

ImageLoader imageLoader = AppController.getInstance().getImageLoader();

// If you are using normal ImageView
imageLoader.get(Const.URL_IMAGE, new ImageListener() {

  @Override
  public void onErrorResponse(VolleyError error) {
    Log.e(TAG, "Image Load Error: " + error.getMessage());
  }

  @Override
  public void onResponse(ImageContainer response, boolean arg1) {
    if (response.getBitmap() != null) {
      // load image into imageview
      imageView.setImageBitmap(response.getBitmap());
    }
  }
});

// Loading image with placeholder and error image
imageLoader.get(Const.URL_IMAGE, ImageLoader.getImageListener(imageView, R.drawable.ico_loading, R.drawable.ico_error));

Cache cache = AppController.getInstance().getRequestQueue().getCache();
Entry entry = cache.get(url);
if(entry != null){
  try {
    String data = new String(entry.data, "UTF-8");
    // handle data, like converting it to xml, json, bitmap etc.,
  } catch (UnsupportedEncodingException e) {   
    e.printStackTrace();
    }
  }
}else{
  // Cached response doesn't exists. Make network call here
}

AppController.getInstance().getRequestQueue().getCache().invalidate(url, true);

// String request
StringRequest stringReq = new StringRequest(....);

// disable cache
stringReq.setShouldCache(false);

AppController.getInstance().getRequestQueue().getCache().remove(url);

AppController.getInstance().getRequestQueue().getCache().clear();

String tag_json_arry = "json_req";
ApplicationController.getInstance().getRequestQueue().cancelAll("feed_request");

private Priority priority = Priority.HIGH;

StringRequest strReq = new StringRequest(Method.GET,
      Const.URL_STRING_REQ, new Response.Listener<String>() {

        @Override
        public void onResponse(String response) {
          Log.d(TAG, response.toString());
          msgResponse.setText(response.toString());
          hideProgressDialog();

        }
      }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
          VolleyLog.d(TAG, "Error: " + error.getMessage());
          hideProgressDialog();
        }
      }) {
    @Override
    public Priority getPriority() {
      return priority;
    }

  };