@Override
public File get(String imageUri) {
DiskLruCache.Snapshot snapshot = null;
try {
snapshot = cache.get(getKey(imageUri));
return snapshot == null ? null : snapshot.getFile(0);
} catch (IOException e) {
L.e(e);
return null;
} finally {
if (snapshot != null) {
snapshot.close();
}
}
}
/**
* Tells whether the key exists in the disk cache.
*
* @param url the key to check for.
* @return true if it exists, false otherwise.
*/
private static boolean isBitmapInDiskCache(String url) {
String key = hashKeyForDisk(url);
if (mDiskCache != null) {
try {
DiskLruCache.Snapshot snapshot = mDiskCache.get(key);
if (snapshot == null) {
Log.d("DiskCache", "Miss: " + url);
return false;
} else {
Log.d("DiskCache", "Hit: " + url);
snapshot.close();
return true;
}
} catch (IOException iox) {
iox.printStackTrace();
}
}
return false;
}
/**
* Reads a Bitmap from the disk cache.
*
* @param url the url of the resource.
* @return the decoded Bitmap.
*/
private static Bitmap readBitmapFromDiskCache(String url) {
String key = hashKeyForDisk(url);
// This shouldn't happen, but better safe than sorry
if (mDiskCache != null) {
Bitmap bitmap = null;
try {
DiskLruCache.Snapshot snapshot = mDiskCache.get(key);
if (snapshot != null) {
// Load the Bitmap file from the cache and close the snapshot (closing
// the snapshot also closes the InputStream)
FileInputStream inputStream = (FileInputStream) snapshot.getInputStream(DISK_CACHE_INDEX);
bitmap = BitmapFactory.decodeFileDescriptor(inputStream.getFD());
snapshot.close();
}
} catch (IOException iox) {
iox.printStackTrace();
}
return bitmap;
}
return null;
}
