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 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 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;
}
/**
* 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;
}
/**
* 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);
}
}
/** Read the images from the cache */
private Bitmap getImageFromCache(String key) {
return mLruCache.get(key);
}
public boolean hasKeyInMemory(String url, int preferredWidth, int preferredHeight) {
synchronized (mMemoryCache) {
return mMemoryCache.get(getCacheKey(url, preferredWidth, preferredHeight)) != null;
}
}
public boolean hasKeyInMemory(String url) {
synchronized (mMemoryCache) {
return mMemoryCache.get(getCacheKey(url)) != null;
}
}
