public IImage getImageForUri(Uri uri) {
if (!isChildImageUri(uri)) return null;
// Find the id of the input URI.
long matchId;
try {
matchId = ContentUris.parseId(uri);
} catch (NumberFormatException ex) {
Log.i(TAG, "fail to get id in: " + uri, ex);
return null;
}
// TODO: design a better method to get URI of specified ID
Cursor cursor = getCursor();
if (cursor == null) return null;
synchronized (this) {
cursor.moveToPosition(-1); // before first
for (int i = 0; cursor.moveToNext(); ++i) {
if (getImageId(cursor) == matchId) {
BaseImage image = mCache.get(i);
if (image == null) {
image = loadImageFromCursor(cursor);
mCache.put(i, image);
}
return image;
}
}
return null;
}
}
public IImage getImageAt(int i) {
BaseImage result = mCache.get(i);
if (result == null) {
Cursor cursor = getCursor();
if (cursor == null) return null;
synchronized (this) {
result = cursor.moveToPosition(i) ? loadImageFromCursor(cursor) : null;
mCache.put(i, result);
}
}
return result;
}
/**
* Add a bitmap to memory cache.
*
* @param data
* @param bitmap
* @param cornerRadio
*/
public void addBitmapToMenCache(String data, Bitmap bitmap, int cornerRadio) {
if (data == null || bitmap == null) {
return;
}
// Create a memory cache key with data url and corner radio.
String key = createKey(data, cornerRadio);
// Add to memory cache
if (mMemoryCache != null && mMemoryCache.get(key) == null) {
mMemoryCache.put(key, bitmap);
}
}
public void onTrimMemory(int level) {
synchronized (mMemoryCache) {
if (mMemoryCache != null) {
if (level >= ComponentCallbacks2.TRIM_MEMORY_MODERATE) { // 60
// Nearing middle of list of cached background apps
mMemoryCache.evictAll();
} else if (level >= ComponentCallbacks2.TRIM_MEMORY_BACKGROUND) { // 40
// Entering list of cached background apps
mMemoryCache.trimToSize(mMemoryCache.size() / 2);
}
}
}
}
public void onLowMemory() {
if (mMemoryCache != null) {
synchronized (mMemoryCache) {
mMemoryCache.evictAll();
}
}
}
public synchronized T getLock(T key) {
T value = super.get(key);
if (value == null) {
value = key;
super.put(key, value);
}
return value;
}
@Override
protected void entryRemoved(
boolean evicted, String key, CacheEntry oldValue, CacheEntry newValue) {
super.entryRemoved(evicted, key, oldValue, newValue);
if (newValue != null) return;
if (loading) return;
new File(directory, key).delete();
}
public void queryCache(String url, ImageCacheListener listener, DownloadRequest downloadRequest) {
if (url == null) {
listener.onImageNotFound(this, url, downloadRequest);
return;
}
String fullSizeCacheKey = getCacheKey(url);
String scaledCacheKey = "";
int desiredWidth = downloadRequest.getListener().getDesiredWidth();
int desiredHeight = downloadRequest.getListener().getDesiredHeight();
if (desiredWidth > 0 && desiredHeight > 0) {
scaledCacheKey = getCacheKey(url, desiredWidth, desiredHeight);
synchronized (mMemoryCache) {
Bitmap scaledBitmap = mMemoryCache.get(scaledCacheKey);
if (scaledBitmap != null) {
listener.onImageFound(this, scaledBitmap, url, downloadRequest);
return;
}
}
}
// First check the in-memory cache...
synchronized (mMemoryCache) {
Bitmap cachedBitmap = mMemoryCache.get(fullSizeCacheKey);
if (cachedBitmap != null) {
// ...notify listener immediately, no need to go async
listener.onImageFound(this, cachedBitmap, url, downloadRequest);
return;
}
}
if (mDiskCache != null) {
ThreadPoolAsyncTaskRunner.runTaskOnPool(
ThreadPoolAsyncTaskRunner.THUMBNAIL_THREAD_POOL,
new BitmapDecoderTask(url, listener, downloadRequest),
(Object[]) null);
return;
}
listener.onImageNotFound(this, url, downloadRequest);
}
public List<Bitmap> removeByPrefix(String cacheKeyPrefix) {
synchronized (mMemoryCache) {
List<Bitmap> bitmaps = mMemoryCache.removeByPrefix(getCacheKey(cacheKeyPrefix));
// TODO: Try to remove from disk cache
return bitmaps;
}
}
@Override
protected void trimToSize(int maxSize) {
// Before removing the non recycled bitmaps, first we remove all the
// Recycled Bitmaps
if (size > maxSize) {
evictionCount = evictionCount + cleanRecycledBitmaps();
}
super.trimToSize(maxSize);
}
public void remove(String cacheKey) {
synchronized (mMemoryCache) {
mMemoryCache.remove(getCacheKey(cacheKey));
}
try {
mDiskCache.remove(getCacheKey(cacheKey));
} catch (IOException e) {
e.printStackTrace();
}
}
public void clear() {
try {
mDiskCache.delete();
openDiskCache();
} catch (IOException e) {
e.printStackTrace();
}
synchronized (mMemoryCache) {
mMemoryCache.evictAll();
}
}
/**
* Get bitmap from memory cache.
*
* @param data
* @param cornerRadio
* @return
*/
public Bitmap getBitmapFromMemCache(String data, int cornerRadio) {
if (mMemoryCache != null) {
String key = createKey(data, cornerRadio);
final Bitmap memBitmap = mMemoryCache.get(key);
if (memBitmap != null) {
if (ImageWorker.DEBUG) {
Log.d(TAG, "Memory cache hit");
}
return memBitmap;
}
}
return null;
}
public BaseImageList(ContentResolver resolver, Uri uri, int sort, String bucketId) {
mSort = sort;
mBaseUri = uri;
mBucketId = bucketId;
mContentResolver = resolver;
mCursor = createCursor();
if (mCursor == null) {
Log.w(TAG, "createCursor returns null.");
}
// TODO: We need to clear the cache because we may "reopen" the image
// list. After we implement the image list state, we can remove this
// kind of usage.
mCache.clear();
}
public boolean hasKeyInMemory(String url, int preferredWidth, int preferredHeight) {
synchronized (mMemoryCache) {
return mMemoryCache.get(getCacheKey(url, preferredWidth, preferredHeight)) != null;
}
}
/** Add images to the cache */
private void addImageToCache(String key, Bitmap bitmap) {
if (getImageFromCache(key) == null && bitmap != null) mLruCache.put(key, bitmap);
}
/** Read the images from the cache */
private Bitmap getImageFromCache(String key) {
return mLruCache.get(key);
}
public void clearMemoryCache() {
synchronized (mMemoryCache) {
mMemoryCache.evictAll();
}
}
/** Clean caches, both memory cache and disk cache. */
public void cleanCaches() {
mDiskCache.clearCache();
mMemoryCache.evictAll();
}
protected void invalidateCache() {
mCache.clear();
}
/** Clean memory cache. */
public void cleanMemCache() {
mMemoryCache.evictAll();
}
public boolean hasKeyInMemory(String url) {
synchronized (mMemoryCache) {
return mMemoryCache.get(getCacheKey(url)) != null;
}
}
public void storeToMemory(Bitmap bitmap, String cacheKey) {
synchronized (mMemoryCache) {
mMemoryCache.put(cacheKey, bitmap);
}
}
