VolleySingleton.java

package com.twormobile.itrackmygps;

import android.content.Context;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;

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

    private static VolleySingleton instance;
    private RequestQueue mRequestQueue;

    private VolleySingleton(Context context) {
        if(mRequestQueue == null)
                mRequestQueue = Volley.newRequestQueue(context);
    }

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

    public RequestQueue getRequestQueue() {
        return mRequestQueue;
    }

    public <T> void addToRequestQueue(Request<T> req) {
        req.setTag(TAG);
        getRequestQueue().add(req);
    }

    public void cancelPendingRequests() {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(TAG);
        }
    }
}