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Supposing JSONObject is yours response from server
Step 1)
Create an Interface ServerCallback
package xx.xx.xx.utils;

    import org.json.JSONObject;

    public interface ServerCallback{
        void onSuccess(JSONObject result);
    }
Step 2) Supposing yours Volley server request method is in Controller class do this in yours anyActivity
Controller controller = new Controller();
controller.youFunctionForVolleyRequest(email, password, this, loginUrl, new ServerCallback() {
                    @Override
                    public void onSuccess(JSONObject response) {
                       // do stuff here 
                    }
                  }
               );
3) In yours Controller class , call ServerCallback function in inResponse()
 public void youFunctionForVolleyRequest(final String email , final String password ,final Context context , final String URL, final ServerCallback callback)
    {
        HashMap<String, String> params = new HashMap<String, String>();
        params.put("email", email);
        params.put("password", password);

        Log.e("sending json",params.toString());
        JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
                URL, new JSONObject(params), new Response.Listener<JSONObject>()
        {

            @Override
            public void onResponse(JSONObject response) {
               callback.onSuccess(response); // call call back function here

            }
        }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError error) {
                //VolleyLog.d("Volley error json object ", "Error: " + error.getMessage());

            }
        }){
            @Override
            public String getBodyContentType()
            {
                return "application/json";
            }
        };

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

    }

protected static void URLToJson(String _URL, final ServerCallback callback) {

        StringRequest stringRequest = new StringRequest(Request.Method.GET, _URL, new Response.Listener<String>()

        {

            @Override
            public void onResponse(String response) {
                callback.onSuccess(response); // call call back function here

            }
        }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError error) {
                //VolleyLog.d("Volley error json object ", "Error: " + error.getMessage());

            }
        }){
            @Override
            public String getBodyContentType()
            {
                return "application/json";
            }
        };

        // Adding request to request queue
        AppController.getInstance().addToRequestQueue(stringRequest);

    }

import android.app.Application;
import android.text.TextUtils;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;
public class AppController extends Application {

    public static final String TAG = AppController.class.getSimpleName();

    private RequestQueue mRequestQueue;
    private static AppController mInstance;

    @Override
    public void onCreate() {
        super.onCreate();
        mInstance = this;
    }

    public static synchronized AppController getInstance() {
        return mInstance;
    }

    public RequestQueue getRequestQueue() {
        if (mRequestQueue == null) {
            mRequestQueue = Volley.newRequestQueue(getApplicationContext());
        }

        return mRequestQueue;
    }

    // TODO adding request to queue
    // Request'i volley'in Q sırasına atıyoruz
    public <T> void addToRequestQueue(Request<T> req, String tag) {
        req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
        getRequestQueue().add(req);
    }

    // TODO adding request to queue
    // Request'i volley'in Q sırasına atıyoruz
    public <T> void addToRequestQueue(Request<T> req) {
        req.setTag(TAG);
        getRequestQueue().add(req);
    }

    // TODO cancel request from queue
    // Request'i volley'in Q sırasından çıkarıyoruz
    public void cancelPendingRequests(Object tag) {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(tag);
        }
    }

}

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