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Cache WeakReferences to our box art bitmaps after LRU evictions

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This commit is contained in:
Cameron Gutman 2020-06-10 23:13:07 -07:00
parent b5bd329ada
commit 4587c1550d
1 changed files with 41 additions and 3 deletions
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44
app/src/main/java/com/limelight/grid/assets/MemoryAssetLoader.java
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@ -5,6 +5,9 @@ import android.util.LruCache;
import com.limelight.LimeLog; import com.limelight.LimeLog;
import java.lang.ref.WeakReference;
import java.util.HashMap;
public class MemoryAssetLoader { public class MemoryAssetLoader {
private static final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024); private static final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
private static final LruCache<String, Bitmap> memoryCache = new LruCache<String, Bitmap>(maxMemory / 16) { private static final LruCache<String, Bitmap> memoryCache = new LruCache<String, Bitmap>(maxMemory / 16) {
@ -13,18 +16,51 @@ public class MemoryAssetLoader {
// Sizeof returns kilobytes // Sizeof returns kilobytes
return bitmap.getByteCount() / 1024; return bitmap.getByteCount() / 1024;
} }
@Override
protected void entryRemoved(boolean evicted, String key, Bitmap oldValue, Bitmap newValue) {
super.entryRemoved(evicted, key, oldValue, newValue);
if (evicted) {
// Keep a weak reference around to the bitmap as long as we can
evictionCache.put(key, new WeakReference<>(oldValue));
}
}
}; };
private static final HashMap<String, WeakReference<Bitmap>> evictionCache = new HashMap<>();
private static String constructKey(CachedAppAssetLoader.LoaderTuple tuple) { private static String constructKey(CachedAppAssetLoader.LoaderTuple tuple) {
return tuple.computer.uuid+"-"+tuple.app.getAppId(); return tuple.computer.uuid+"-"+tuple.app.getAppId();
} }
public Bitmap loadBitmapFromCache(CachedAppAssetLoader.LoaderTuple tuple) { public Bitmap loadBitmapFromCache(CachedAppAssetLoader.LoaderTuple tuple) {
Bitmap bmp = memoryCache.get(constructKey(tuple)); final String key = constructKey(tuple);
Bitmap bmp = memoryCache.get(key);
if (bmp != null) { if (bmp != null) {
LimeLog.info("Memory cache hit for tuple: "+tuple); LimeLog.info("LRU cache hit for tuple: "+tuple);
return bmp;
} }
return bmp;
WeakReference<Bitmap> bmpRef = evictionCache.get(key);
if (bmpRef != null) {
bmp = bmpRef.get();
if (bmp != null) {
LimeLog.info("Eviction cache hit for tuple: "+tuple);
// Put this entry back into the LRU cache
evictionCache.remove(key);
memoryCache.put(key, bmp);
return bmp;
}
else {
// The data is gone, so remove the dangling WeakReference now
evictionCache.remove(key);
}
}
return null;
} }
public void populateCache(CachedAppAssetLoader.LoaderTuple tuple, Bitmap bitmap) { public void populateCache(CachedAppAssetLoader.LoaderTuple tuple, Bitmap bitmap) {
@ -32,6 +68,8 @@ public class MemoryAssetLoader {
} }
public void clearCache() { public void clearCache() {
// We must evict first because that will push all items into the eviction cache
memoryCache.evictAll(); memoryCache.evictAll();
evictionCache.clear();
} }
} }