Volley Image Wrapper used with standard Android ImageViews ( android.widget.ImageView)

VolleyImageWrapper.java

package com.example.exampleapp;

import android.widget.ImageView;

import com.android.volley.RequestQueue;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.ImageLoader.ImageContainer;

public final class VolleyImageWrapper {
  
	private static ImageLoader imageLoader = null;
	
	public static ImageLoader getImageLoader() {
		if (imageLoader == null) {
			RequestQueue requestQueue = VolleyRequestTask.getRequestQueue();
			imageLoader = new ImageLoader(requestQueue, new BitmapLruCache());
		} 
		return imageLoader;
	}
	/**
	 * Helper method to load remote image into an ImageView asynchronously via Volley.  The size of the ImageView is used to indicate the maximum size to Volley
	 * @param url The url to load the image from
	 * @param imageView The imageView to display the image into (as well as the loading/error resources)
	 * @param loadingResourceId The drawable resource id to display while the image is being retrieved. A value of 0 will not display a loading image.
	 * @param errorResourceId The drawable resource id to display if there is an error. A value of 0 will not display an error image.
	 * @return an ImageContainer object that can be used to cancel the request.
	 */
	public static ImageContainer loadIntoImageView(final String url, final ImageView imageView, final int loadingResourceId, final int errorResourceId) {
		
		if (imageView == null)
			return null;
		ImageLoader.ImageContainer imageContainer = getImageLoader().get(url, new ImageLoader.ImageListener() {
		             
		            public void onErrorResponse(VolleyError arg0) {		
		            	if (errorResourceId > 0) // set an error image if the download fails
		            		imageView.setImageResource(errorResourceId); 
		            }
		             
		            public void onResponse(ImageLoader.ImageContainer response, boolean isImmediate) {		            
		                if (response.getBitmap() != null) {
		                    imageView.setImageBitmap(response.getBitmap());
		                } else {
		                	if (loadingResourceId > 0)
		                		imageView.setImageResource(loadingResourceId);
		                }
		            }
		        }, imageView.getWidth(), imageView.getHeight());
		
		return imageContainer;
	}
	
	/**
	 * @see loadIntoImage(String, ImageView, int, int);
	 */
	public static ImageContainer loadIntoImageView(final String url, final ImageView imageView) {
		return loadIntoImageView(url, imageView, 0, 0);
	}
	
}