content: /*******************************************************************************
   * Software Name : RCS IMS Stack
   *
   * Copyright (C) 2010-2016 Orange.
   *
   * 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.gsma.rcs.ri.utils;
  
  import android.support.v4.util.LruCache;
  
  /**
   * Created by yplo6403 on 07/12/2015.
   */
  public class BitmapCache {
  
      private static volatile BitmapCache sInstance;
      private LruCache<String, BitmapLoader.BitmapCacheInfo> mMemoryCache;
  
      private BitmapCache() {
          /*
           * Get max available VM memory, exceeding this amount will throw an OutOfMemory exception.
           * Stored in kilobytes as LruCache takes an int in its constructor.
           */
          final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
  
          /* Use 1/8th of the available memory for this memory cache. */
          final int cacheSize = maxMemory / 8;
  
          mMemoryCache = new LruCache<String, BitmapLoader.BitmapCacheInfo>(cacheSize) {
  
              /**
               * Measure item size in kilobytes rather than units which is more practical for a bitmap
               * cache
               */
              @Override
              protected int sizeOf(String key, BitmapLoader.BitmapCacheInfo bitmapCacheInfo) {
                  /*
                   * The cache size will be measured in kilobytes rather than number of items.
                   */
                  return bitmapCacheInfo.getBitmap().getByteCount() / 1024;
              }
          };
      }
  
      public static BitmapCache getInstance() {
          if (sInstance != null) {
              return sInstance;
          }
          synchronized (BitmapCache.class) {
              if (sInstance == null) {
                  sInstance = new BitmapCache();
              }
              return sInstance;
          }
      }
  
      public LruCache<String, BitmapLoader.BitmapCacheInfo> getMemoryCache() {
          return mMemoryCache;
      }
  }
  