Java tutorial
/** * Copyright 2013 Ognyan Bankov * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.radioeye.volley; 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; /** * Helper class that is used to provide references to initialized RequestQueue(s) and ImageLoader(s) * * @author Ognyan Bankov * */ public class MyVolley { private static RequestQueue mRequestQueue; private static ImageLoader mImageLoader; private MyVolley() { // no instances } public static void init(Context context) { mRequestQueue = Volley.newRequestQueue(context); mImageLoader = new ImageLoader(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 RequestQueue getRequestQueue() { if (mRequestQueue != null) { return mRequestQueue; } else { throw new IllegalStateException("RequestQueue not initialized"); } } /** * Returns instance of ImageLoader initialized with {@see FakeImageCache} which effectively means * that no memory caching is used. This is useful for images that you know that will be show * only once. * * @return */ public static ImageLoader getImageLoader() { if (mImageLoader != null) { return mImageLoader; } else { throw new IllegalStateException("ImageLoader not initialized"); } } }