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package com.bumptech.glide.load.engine.cache;
import android.annotation.SuppressLint;
import com.bumptech.glide.load.Key;
import com.bumptech.glide.load.engine.Resource;
import com.bumptech.glide.util.LruCache;
/**
* An LRU in memory cache for {@link com.bumptech.glide.load.engine.Resource}s.
*/
public class LruResourceCache extends LruCache<Key, Resource<?>> implements MemoryCache {
private ResourceRemovedListener listener;
/**
* Constructor for LruResourceCache.
*
* @param size The maximum size in bytes the in memory cache can use.
*/
public LruResourceCache(int size) {
super(size);
}
@Override
public void setResourceRemovedListener(ResourceRemovedListener listener) {
this.listener = listener;
}
@Override
protected void onItemEvicted(Key key, Resource<?> item) {
if (listener != null) {
listener.onResourceRemoved(item);
}
}
@Override
protected int getSize(Resource<?> item) {
return item.getSize();
}
@SuppressLint("InlinedApi")
@Override
public void trimMemory(int level) {
if (level >= android.content.ComponentCallbacks2.TRIM_MEMORY_MODERATE) {
// Nearing middle of list of cached background apps
// Evict our entire bitmap cache
clearMemory();
} else if (level >= android.content.ComponentCallbacks2.TRIM_MEMORY_BACKGROUND) {
// Entering list of cached background apps
// Evict oldest half of our bitmap cache
trimToSize(getCurrentSize() / 2);
}
}
}
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