ImageLoader implementation for my own fork of the Cast Companion Library using the Volley library. See: https://github.com/cbeyls/CastCompanionLibrary-android

VolleyImageLoader.java

package com.google.sample.castcompanionlibrary.cast.imageloader;

import android.content.Context;
import android.util.DisplayMetrics;

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

/**
 * ImageLoader implementation for the Cast Companion Library using the Volley library.
 * 
 * @author Christophe Beyls
 * 
 */
public class VolleyImageLoader implements ImageLoader {

	private final int mMaxImageSize;
	private final com.android.volley.toolbox.ImageLoader mVolleyLoader;

	private static class VolleyRequest implements ImageListener, ImageLoader.Request {

		private final Callbacks mCallbacks;
		private ImageContainer mContainer;

		public VolleyRequest(Callbacks callbacks) {
			mCallbacks = callbacks;
		}

		@Override
		public void onErrorResponse(VolleyError error) {
			mCallbacks.onResponse(null);
		}

		@Override
		public void onResponse(ImageContainer response, boolean isImmediate) {
			mCallbacks.onResponse(response.getBitmap());
		}

		public void setImageContainer(ImageContainer container) {
			mContainer = container;
		}

		@Override
		public String getUrl() {
			return mContainer.getRequestUrl();
		}
	}

	public VolleyImageLoader(Context context, com.android.volley.toolbox.ImageLoader loader) {
		// Use the device primary screen dimensions as max image size
		DisplayMetrics metrics = context.getResources().getDisplayMetrics();
		mMaxImageSize = Math.max(metrics.widthPixels, metrics.heightPixels);
		mVolleyLoader = loader;
	}

	@Override
	public Request load(String url, Callbacks callbacks) {
		VolleyRequest volleyRequest = new VolleyRequest(callbacks);
		volleyRequest.setImageContainer(mVolleyLoader.get(url, volleyRequest, mMaxImageSize, mMaxImageSize));
		return volleyRequest;
	}

	@Override
	public void cancelRequest(Request request) {
		((VolleyRequest) request).mContainer.cancelRequest();
	}
}