1 package com.bumptech.glide.load.engine.cache; 2 3 import com.bumptech.glide.load.Key; 4 import com.bumptech.glide.load.engine.Resource; 5 6 /** 7 * An interface for adding and removing resources from an in memory cache. 8 */ 9 public interface MemoryCache { 10 /** 11 * An interface that will be called whenever a bitmap is removed from the cache. 12 */ 13 interface ResourceRemovedListener { 14 void onResourceRemoved(Resource<?> removed); 15 } 16 17 /** 18 * Returns the sum of the sizes of all the contents of the cache in bytes. 19 */ 20 int getCurrentSize(); 21 22 /** 23 * Returns the current maximum size in bytes of the cache. 24 */ 25 int getMaxSize(); 26 27 /** 28 * Adjust the maximum size of the cache by multiplying the original size of the cache by the given multiplier. 29 * 30 * <p> 31 * If the size multiplier causes the size of the cache to be decreased, items will be evicted until the cache 32 * is smaller than the new size. 33 * </p> 34 * 35 * @param multiplier A size multiplier >= 0. 36 */ 37 void setSizeMultiplier(float multiplier); 38 39 /** 40 * Removes the value for the given key and returns it if present or null otherwise. 41 * 42 * @param key The key. 43 */ 44 Resource<?> remove(Key key); 45 46 /** 47 * Add bitmap to the cache with the given key. 48 * 49 * @param key The key to retrieve the bitmap. 50 * @param resource The {@link com.bumptech.glide.load.engine.EngineResource} to store. 51 * @return The old value of key (null if key is not in map). 52 */ 53 Resource<?> put(Key key, Resource<?> resource); 54 55 /** 56 * Set the listener to be called when a bitmap is removed from the cache. 57 * 58 * @param listener The listener. 59 */ 60 void setResourceRemovedListener(ResourceRemovedListener listener); 61 62 /** 63 * Evict all items from the memory cache. 64 */ 65 void clearMemory(); 66 67 /** 68 * Trim the memory cache to the appropriate level. Typically called on the callback onTrimMemory. 69 * 70 * @param level This integer represents a trim level as specified in {@link android.content.ComponentCallbacks2}. 71 */ 72 void trimMemory(int level); 73 } 74
