/** * @author gongchaobin *  * LruCache缓存Bitmap * (基于内存的缓存,读取时间比较快) */public class LruCacheUtil {    private static final String TAG = LruCacheUtil.class.getSimpleName();    private int memClass;    private LruCache
     
       mMemoryCache;//高速缓存(系统)    public static final String BITMAP = "bitmap";        public LruCacheUtil(Context context){        memClass = ((ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE)).getMemoryClass();        final int cacheSize = 1024 * 1024 * memClass / 8;        mMemoryCache = new LruCache
      
       (cacheSize);    }        public void addBitmapToMemoryCache(String key, Bitmap bitmap) {        if (getBitmapFromMemCache(key) == null) {            mMemoryCache.put(key, bitmap);        }    }        public Bitmap getBitmapFromMemCache(String key) {        return mMemoryCache.get(key);    }}