Singleton Pattern in Volley library

Singleton Pattern in Volley library

Google recommends that you use a common RequestQueue object for your app in the form of a Singleton. 

import android.content.Context;

import android.graphics.Bitmap;

import android.support.v4.util.LruCache;

import com.android.volley.RequestQueue;

import com.android.volley.toolbox.ImageLoader;

import com.android.volley.toolbox.Volley;

public class VolleySingleton {

private static VolleySingleton mInstance = null;

private RequestQueue mRequestQueue;

private ImageLoader mImageLoader;

private VolleySingleton(Context context){

mRequestQueue = Volley.newRequestQueue(context);

mImageLoader = new ImageLoader(this.mRequestQueue, new ImageLoader.ImageCache() {

private final LruCache<String, Bitmap> mCache = new LruCache<String, Bitmap>(10);

public void putBitmap(String url, Bitmap bitmap) {

mCache.put(url, bitmap);

}

public Bitmap getBitmap(String url) {

return mCache.get(url);

}

});

}

public static VolleySingleton getInstance(Context context){

if(mInstance == null){

mInstance = new VolleySingleton(context);

}

return mInstance;

}

public RequestQueue getRequestQueue(){

return this.mRequestQueue;

}

public ImageLoader getImageLoader(){

return this.mImageLoader;

}

}

use this

RequestQueue queue = VolleySingleton.getInstance(context).getRequestQueue();

//or

mImageLoader = VolleySingleton.getInstance(context).getImageLoader();